./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix014.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/mix014.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/mix014.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix014.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 20:40:53,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:40:53,770 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:40:53,773 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:40:53,774 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:40:53,790 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:40:53,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:40:53,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:40:53,794 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:40:53,797 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:40:53,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:40:53,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:40:53,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:40:53,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:40:53,800 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:40:53,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:40:53,800 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:40:53,801 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:40:53,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:40:53,802 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:40:53,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:40:53,802 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:40:53,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:40:53,803 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:40:53,803 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:40:53,803 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:40:53,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:40:53,803 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:40:53,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:40:53,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:40:53,805 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:40:53,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:40:53,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:40:53,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:40:53,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:40:53,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:40:53,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:40:53,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:40:53,807 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:40:53,807 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:40:53,807 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:40:53,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:40:53,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:40:53,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:40:54,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:40:54,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:40:54,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:40:54,080 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:40:54,080 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:40:54,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix014.opt.i [2024-06-21 20:40:54,970 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:40:55,210 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:40:55,210 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix014.opt.i [2024-06-21 20:40:55,230 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3d9a2162/ec1a1d8bf7a64aa6a2a151c37905ca51/FLAG7e28b5b71 [2024-06-21 20:40:55,239 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3d9a2162/ec1a1d8bf7a64aa6a2a151c37905ca51 [2024-06-21 20:40:55,241 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:40:55,242 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:40:55,242 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix014.opt.yml/witness.yml [2024-06-21 20:40:55,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:40:55,421 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:40:55,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:40:55,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:40:55,426 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:40:55,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:40:55" (1/2) ... [2024-06-21 20:40:55,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b6ac3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:40:55, skipping insertion in model container [2024-06-21 20:40:55,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:40:55" (1/2) ... [2024-06-21 20:40:55,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f4fafad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:40:55, skipping insertion in model container [2024-06-21 20:40:55,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:40:55" (2/2) ... [2024-06-21 20:40:55,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b6ac3b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:40:55, skipping insertion in model container [2024-06-21 20:40:55,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:40:55" (2/2) ... [2024-06-21 20:40:55,431 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:40:55,528 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:40:55,529 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:40:55,529 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 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)) && (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)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:40:55,529 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:40:55,529 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 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)) && (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)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:40:55,530 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:40:55,530 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-21 20:40:55,567 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:40:55,853 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:40:55,860 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 20:40:56,050 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:40:56,080 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:40:56,081 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:40:56 WrapperNode [2024-06-21 20:40:56,081 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:40:56,082 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:40:56,082 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:40:56,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:40:56,088 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,118 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,165 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-21 20:40:56,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:40:56,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:40:56,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:40:56,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:40:56,177 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,177 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,192 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,207 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 20:40:56,207 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,207 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,228 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,230 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,232 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,233 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,255 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:40:56,256 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:40:56,256 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:40:56,256 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:40:56,257 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 08:40:56" (1/1) ... [2024-06-21 20:40:56,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:40:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:40:56,290 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 20:40:56,310 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 20:40:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:40:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:40:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:40:56,326 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:40:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:40:56,326 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:40:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:40:56,326 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:40:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 20:40:56,326 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 20:40:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:40:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:40:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:40:56,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:40:56,329 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 20:40:56,443 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:40:56,445 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:40:56,819 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:40:56,820 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:40:56,962 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:40:56,962 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:40:56,963 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:40:56 BoogieIcfgContainer [2024-06-21 20:40:56,963 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:40:56,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:40:56,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:40:56,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:40:56,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:40:55" (1/4) ... [2024-06-21 20:40:56,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e2d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:40:56, skipping insertion in model container [2024-06-21 20:40:56,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:40:55" (2/4) ... [2024-06-21 20:40:56,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e2d76 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:40:56, skipping insertion in model container [2024-06-21 20:40:56,969 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 08:40:56" (3/4) ... [2024-06-21 20:40:56,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e2d76 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:40:56, skipping insertion in model container [2024-06-21 20:40:56,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:40:56" (4/4) ... [2024-06-21 20:40:56,970 INFO L112 eAbstractionObserver]: Analyzing ICFG mix014.opt.i [2024-06-21 20:40:56,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:40:56,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 20:40:56,984 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:40:57,032 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:40:57,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 20:40:57,087 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 20:40:57,088 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:40:57,089 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 5. Compared 91 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 20:40:57,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 20:40:57,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 20:40:57,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:40:57,107 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;@6183b39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:40:57,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 20:40:57,110 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:40:57,110 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:40:57,111 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:40:57,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:57,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:40:57,111 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 20:40:57,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:57,116 INFO L85 PathProgramCache]: Analyzing trace with hash 423968388, now seen corresponding path program 1 times [2024-06-21 20:40:57,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:57,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960482924] [2024-06-21 20:40:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:58,046 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 20:40:58,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:58,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960482924] [2024-06-21 20:40:58,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960482924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:58,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:58,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:40:58,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612270469] [2024-06-21 20:40:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:40:58,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:40:58,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:40:58,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-21 20:40:58,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:58,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:58,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-21 20:40:58,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:59,111 INFO L124 PetriNetUnfolderBase]: 6201/8845 cut-off events. [2024-06-21 20:40:59,111 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-21 20:40:59,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17601 conditions, 8845 events. 6201/8845 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 51097 event pairs, 4673 based on Foata normal form. 1/8528 useless extension candidates. Maximal degree in co-relation 17588. Up to 8487 conditions per place. [2024-06-21 20:40:59,164 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 20:40:59,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-21 20:40:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:40:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:40:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-21 20:40:59,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540880503144654 [2024-06-21 20:40:59,175 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 104 transitions. [2024-06-21 20:40:59,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-21 20:40:59,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:40:59,182 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 20:40:59,184 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 20:40:59,187 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 20:40:59,188 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 20:40:59,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:59,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:59,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:59,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:40:59,189 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 20:40:59,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash -587121513, now seen corresponding path program 1 times [2024-06-21 20:40:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:59,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217483955] [2024-06-21 20:40:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:59,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:59,836 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 20:40:59,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:59,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217483955] [2024-06-21 20:40:59,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217483955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:59,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:59,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:40:59,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298037339] [2024-06-21 20:40:59,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:59,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:40:59,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:40:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:40:59,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 20:40:59,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:59,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:59,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 20:40:59,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:00,867 INFO L124 PetriNetUnfolderBase]: 7096/9900 cut-off events. [2024-06-21 20:41:00,867 INFO L125 PetriNetUnfolderBase]: For 2066/2066 co-relation queries the response was YES. [2024-06-21 20:41:00,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22638 conditions, 9900 events. 7096/9900 cut-off events. For 2066/2066 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55904 event pairs, 4749 based on Foata normal form. 4/9837 useless extension candidates. Maximal degree in co-relation 22626. Up to 9657 conditions per place. [2024-06-21 20:41:00,922 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 20:41:00,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-21 20:41:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:41:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:41:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-21 20:41:00,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-21 20:41:00,927 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-21 20:41:00,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-21 20:41:00,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:41:00,934 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 20:41:00,934 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 20:41:00,935 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 20:41:00,935 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 20:41:00,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:00,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:00,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:00,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:41:00,939 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 20:41:00,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1020895933, now seen corresponding path program 1 times [2024-06-21 20:41:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:00,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419457360] [2024-06-21 20:41:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:01,706 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 20:41:01,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419457360] [2024-06-21 20:41:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419457360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:01,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:01,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:41:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610523467] [2024-06-21 20:41:01,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:01,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:41:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:41:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:41:01,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 20:41:01,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:41:01,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:01,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 20:41:01,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:02,875 INFO L124 PetriNetUnfolderBase]: 9050/12583 cut-off events. [2024-06-21 20:41:02,875 INFO L125 PetriNetUnfolderBase]: For 7208/7208 co-relation queries the response was YES. [2024-06-21 20:41:02,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31838 conditions, 12583 events. 9050/12583 cut-off events. For 7208/7208 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 70045 event pairs, 4826 based on Foata normal form. 7/12531 useless extension candidates. Maximal degree in co-relation 31824. Up to 12159 conditions per place. [2024-06-21 20:41:02,952 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 71 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-21 20:41:02,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 539 flow [2024-06-21 20:41:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:41:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:41:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-06-21 20:41:02,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-21 20:41:02,956 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 170 transitions. [2024-06-21 20:41:02,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 539 flow [2024-06-21 20:41:02,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 520 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 20:41:02,961 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-21 20:41:02,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 20:41:02,963 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 20:41:02,963 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-21 20:41:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:41:02,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:02,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:02,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:41:02,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:41:02,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash -105883722, now seen corresponding path program 1 times [2024-06-21 20:41:02,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:02,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872496264] [2024-06-21 20:41:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:02,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:03,938 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 20:41:03,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:03,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872496264] [2024-06-21 20:41:03,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872496264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:03,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:03,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:41:03,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590393899] [2024-06-21 20:41:03,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:03,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:41:03,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:41:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:41:04,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 20:41:04,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:04,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:04,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 20:41:04,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:05,376 INFO L124 PetriNetUnfolderBase]: 9079/12627 cut-off events. [2024-06-21 20:41:05,377 INFO L125 PetriNetUnfolderBase]: For 17062/17067 co-relation queries the response was YES. [2024-06-21 20:41:05,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37333 conditions, 12627 events. 9079/12627 cut-off events. For 17062/17067 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 70414 event pairs, 3910 based on Foata normal form. 18/12586 useless extension candidates. Maximal degree in co-relation 37316. Up to 12124 conditions per place. [2024-06-21 20:41:05,443 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 78 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-21 20:41:05,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 112 transitions, 684 flow [2024-06-21 20:41:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:41:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:41:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-21 20:41:05,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194968553459119 [2024-06-21 20:41:05,445 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 197 transitions. [2024-06-21 20:41:05,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 112 transitions, 684 flow [2024-06-21 20:41:05,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 672 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 20:41:05,452 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 389 flow [2024-06-21 20:41:05,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-21 20:41:05,453 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-21 20:41:05,453 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 389 flow [2024-06-21 20:41:05,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:05,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:05,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:05,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:41:05,454 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 20:41:05,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1284174288, now seen corresponding path program 1 times [2024-06-21 20:41:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:05,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638085955] [2024-06-21 20:41:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:06,110 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 20:41:06,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:06,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638085955] [2024-06-21 20:41:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638085955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:06,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:06,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:41:06,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072845208] [2024-06-21 20:41:06,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:41:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:41:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:41:06,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:41:06,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 20:41:06,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:06,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:41:06,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:07,330 INFO L124 PetriNetUnfolderBase]: 7920/11288 cut-off events. [2024-06-21 20:41:07,330 INFO L125 PetriNetUnfolderBase]: For 21902/21902 co-relation queries the response was YES. [2024-06-21 20:41:07,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36204 conditions, 11288 events. 7920/11288 cut-off events. For 21902/21902 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 64911 event pairs, 4036 based on Foata normal form. 3/11087 useless extension candidates. Maximal degree in co-relation 36183. Up to 10775 conditions per place. [2024-06-21 20:41:07,397 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 66 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-21 20:41:07,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 585 flow [2024-06-21 20:41:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:41:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:41:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-21 20:41:07,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-21 20:41:07,399 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 389 flow. Second operand 5 states and 136 transitions. [2024-06-21 20:41:07,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 585 flow [2024-06-21 20:41:07,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 516 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:41:07,406 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 351 flow [2024-06-21 20:41:07,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-21 20:41:07,407 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-21 20:41:07,407 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 351 flow [2024-06-21 20:41:07,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 20:41:07,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:07,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:07,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:41:07,408 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 20:41:07,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1179633152, now seen corresponding path program 1 times [2024-06-21 20:41:07,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:07,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955740903] [2024-06-21 20:41:07,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:07,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:08,223 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 20:41:08,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:08,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955740903] [2024-06-21 20:41:08,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955740903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:08,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:08,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:41:08,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417918824] [2024-06-21 20:41:08,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:08,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:41:08,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:41:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:41:08,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:41:08,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:08,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:08,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:41:08,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:09,680 INFO L124 PetriNetUnfolderBase]: 7911/11249 cut-off events. [2024-06-21 20:41:09,680 INFO L125 PetriNetUnfolderBase]: For 25135/25135 co-relation queries the response was YES. [2024-06-21 20:41:09,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36666 conditions, 11249 events. 7911/11249 cut-off events. For 25135/25135 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 64484 event pairs, 3900 based on Foata normal form. 3/11065 useless extension candidates. Maximal degree in co-relation 36643. Up to 10748 conditions per place. [2024-06-21 20:41:09,754 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-21 20:41:09,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 615 flow [2024-06-21 20:41:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:41:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:41:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 20:41:09,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 20:41:09,755 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 351 flow. Second operand 6 states and 162 transitions. [2024-06-21 20:41:09,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 615 flow [2024-06-21 20:41:09,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 586 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:41:09,766 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 397 flow [2024-06-21 20:41:09,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-21 20:41:09,767 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-21 20:41:09,767 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 397 flow [2024-06-21 20:41:09,767 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 20:41:09,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:09,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:09,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:41:09,768 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 20:41:09,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2080358189, now seen corresponding path program 1 times [2024-06-21 20:41:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:09,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271354831] [2024-06-21 20:41:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:10,560 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 20:41:10,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:10,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271354831] [2024-06-21 20:41:10,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271354831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:10,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:10,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:41:10,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965645309] [2024-06-21 20:41:10,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:41:10,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:41:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:41:10,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:10,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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 20:41:10,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:10,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:10,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:11,931 INFO L124 PetriNetUnfolderBase]: 9074/12590 cut-off events. [2024-06-21 20:41:11,931 INFO L125 PetriNetUnfolderBase]: For 39972/40064 co-relation queries the response was YES. [2024-06-21 20:41:11,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44529 conditions, 12590 events. 9074/12590 cut-off events. For 39972/40064 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69714 event pairs, 4533 based on Foata normal form. 14/12562 useless extension candidates. Maximal degree in co-relation 44506. Up to 12190 conditions per place. [2024-06-21 20:41:12,006 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2024-06-21 20:41:12,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 736 flow [2024-06-21 20:41:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:41:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:41:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 20:41:12,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-21 20:41:12,008 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 397 flow. Second operand 6 states and 167 transitions. [2024-06-21 20:41:12,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 736 flow [2024-06-21 20:41:12,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 693 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:41:12,020 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 450 flow [2024-06-21 20:41:12,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=450, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 20:41:12,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-21 20:41:12,020 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 450 flow [2024-06-21 20:41:12,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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 20:41:12,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:12,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:12,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:41:12,021 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 20:41:12,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:12,022 INFO L85 PathProgramCache]: Analyzing trace with hash 769553221, now seen corresponding path program 2 times [2024-06-21 20:41:12,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:12,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259620370] [2024-06-21 20:41:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:12,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:12,735 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 20:41:12,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:12,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259620370] [2024-06-21 20:41:12,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259620370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:12,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:12,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:41:12,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598489391] [2024-06-21 20:41:12,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:12,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:41:12,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:41:12,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:41:12,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:12,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 450 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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 20:41:12,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:12,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:12,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:14,098 INFO L124 PetriNetUnfolderBase]: 9050/12542 cut-off events. [2024-06-21 20:41:14,098 INFO L125 PetriNetUnfolderBase]: For 46479/46561 co-relation queries the response was YES. [2024-06-21 20:41:14,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45478 conditions, 12542 events. 9050/12542 cut-off events. For 46479/46561 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69332 event pairs, 4553 based on Foata normal form. 3/12498 useless extension candidates. Maximal degree in co-relation 45454. Up to 12160 conditions per place. [2024-06-21 20:41:14,165 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 66 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-06-21 20:41:14,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 696 flow [2024-06-21 20:41:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:41:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:41:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 20:41:14,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 20:41:14,167 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 450 flow. Second operand 6 states and 162 transitions. [2024-06-21 20:41:14,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 696 flow [2024-06-21 20:41:14,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 653 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:41:14,178 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 470 flow [2024-06-21 20:41:14,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-21 20:41:14,179 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-21 20:41:14,179 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 470 flow [2024-06-21 20:41:14,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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 20:41:14,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:14,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:14,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:41:14,180 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 20:41:14,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1516542569, now seen corresponding path program 1 times [2024-06-21 20:41:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:14,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290664821] [2024-06-21 20:41:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:14,973 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 20:41:14,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:14,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290664821] [2024-06-21 20:41:14,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290664821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:14,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:14,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:41:14,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585465961] [2024-06-21 20:41:14,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:14,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:41:14,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:14,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:41:14,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:41:15,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:15,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 470 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:15,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:15,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:15,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:16,459 INFO L124 PetriNetUnfolderBase]: 9316/13010 cut-off events. [2024-06-21 20:41:16,459 INFO L125 PetriNetUnfolderBase]: For 56150/56246 co-relation queries the response was YES. [2024-06-21 20:41:16,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48372 conditions, 13010 events. 9316/13010 cut-off events. For 56150/56246 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 72997 event pairs, 4256 based on Foata normal form. 9/12978 useless extension candidates. Maximal degree in co-relation 48347. Up to 12249 conditions per place. [2024-06-21 20:41:16,521 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 99 selfloop transitions, 55 changer transitions 0/162 dead transitions. [2024-06-21 20:41:16,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 162 transitions, 1330 flow [2024-06-21 20:41:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-21 20:41:16,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535377358490566 [2024-06-21 20:41:16,523 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 470 flow. Second operand 8 states and 227 transitions. [2024-06-21 20:41:16,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 162 transitions, 1330 flow [2024-06-21 20:41:16,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 162 transitions, 1167 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:16,542 INFO L231 Difference]: Finished difference. Result has 81 places, 109 transitions, 791 flow [2024-06-21 20:41:16,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=791, PETRI_PLACES=81, PETRI_TRANSITIONS=109} [2024-06-21 20:41:16,543 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-21 20:41:16,543 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 109 transitions, 791 flow [2024-06-21 20:41:16,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:16,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:16,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:16,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:41:16,543 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 20:41:16,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash 66596481, now seen corresponding path program 2 times [2024-06-21 20:41:16,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:16,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137918136] [2024-06-21 20:41:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:16,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:17,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:17,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137918136] [2024-06-21 20:41:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137918136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:17,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:17,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:41:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422369269] [2024-06-21 20:41:17,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:17,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:41:17,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:41:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:41:17,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:17,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 109 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:17,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:17,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:17,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:19,012 INFO L124 PetriNetUnfolderBase]: 9396/13132 cut-off events. [2024-06-21 20:41:19,012 INFO L125 PetriNetUnfolderBase]: For 73284/73442 co-relation queries the response was YES. [2024-06-21 20:41:19,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53303 conditions, 13132 events. 9396/13132 cut-off events. For 73284/73442 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 73657 event pairs, 4273 based on Foata normal form. 48/13143 useless extension candidates. Maximal degree in co-relation 53274. Up to 12319 conditions per place. [2024-06-21 20:41:19,212 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 86 selfloop transitions, 65 changer transitions 0/159 dead transitions. [2024-06-21 20:41:19,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 159 transitions, 1385 flow [2024-06-21 20:41:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:41:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:41:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 20:41:19,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2024-06-21 20:41:19,214 INFO L175 Difference]: Start difference. First operand has 81 places, 109 transitions, 791 flow. Second operand 7 states and 195 transitions. [2024-06-21 20:41:19,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 159 transitions, 1385 flow [2024-06-21 20:41:19,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 159 transitions, 1344 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 20:41:19,242 INFO L231 Difference]: Finished difference. Result has 86 places, 118 transitions, 1000 flow [2024-06-21 20:41:19,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1000, PETRI_PLACES=86, PETRI_TRANSITIONS=118} [2024-06-21 20:41:19,243 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-21 20:41:19,243 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 118 transitions, 1000 flow [2024-06-21 20:41:19,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:19,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:19,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:41:19,244 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 20:41:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1560468675, now seen corresponding path program 3 times [2024-06-21 20:41:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933065805] [2024-06-21 20:41:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:20,039 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 20:41:20,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:20,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933065805] [2024-06-21 20:41:20,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933065805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:20,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:20,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:41:20,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577964857] [2024-06-21 20:41:20,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:20,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:41:20,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:41:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:41:20,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:20,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 118 transitions, 1000 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:20,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:20,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:20,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:21,636 INFO L124 PetriNetUnfolderBase]: 9436/13213 cut-off events. [2024-06-21 20:41:21,636 INFO L125 PetriNetUnfolderBase]: For 86185/86387 co-relation queries the response was YES. [2024-06-21 20:41:21,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55874 conditions, 13213 events. 9436/13213 cut-off events. For 86185/86387 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 74395 event pairs, 4283 based on Foata normal form. 71/13235 useless extension candidates. Maximal degree in co-relation 55843. Up to 12347 conditions per place. [2024-06-21 20:41:21,735 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 85 selfloop transitions, 81 changer transitions 0/174 dead transitions. [2024-06-21 20:41:21,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 174 transitions, 1786 flow [2024-06-21 20:41:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:41:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:41:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 20:41:21,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 20:41:21,737 INFO L175 Difference]: Start difference. First operand has 86 places, 118 transitions, 1000 flow. Second operand 7 states and 196 transitions. [2024-06-21 20:41:21,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 174 transitions, 1786 flow [2024-06-21 20:41:21,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 174 transitions, 1617 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 20:41:21,827 INFO L231 Difference]: Finished difference. Result has 89 places, 132 transitions, 1213 flow [2024-06-21 20:41:21,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1213, PETRI_PLACES=89, PETRI_TRANSITIONS=132} [2024-06-21 20:41:21,827 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-06-21 20:41:21,828 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 132 transitions, 1213 flow [2024-06-21 20:41:21,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:21,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:21,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:21,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:41:21,828 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:41:21,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash 243728001, now seen corresponding path program 4 times [2024-06-21 20:41:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:21,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421840098] [2024-06-21 20:41:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:22,646 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 20:41:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421840098] [2024-06-21 20:41:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421840098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:22,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:22,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:41:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392793526] [2024-06-21 20:41:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:41:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:41:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:41:22,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:22,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 132 transitions, 1213 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:22,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:22,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:22,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:24,239 INFO L124 PetriNetUnfolderBase]: 9420/13172 cut-off events. [2024-06-21 20:41:24,239 INFO L125 PetriNetUnfolderBase]: For 87102/87301 co-relation queries the response was YES. [2024-06-21 20:41:24,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55647 conditions, 13172 events. 9420/13172 cut-off events. For 87102/87301 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 74023 event pairs, 4295 based on Foata normal form. 92/13220 useless extension candidates. Maximal degree in co-relation 55615. Up to 12336 conditions per place. [2024-06-21 20:41:24,326 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 83 selfloop transitions, 79 changer transitions 0/170 dead transitions. [2024-06-21 20:41:24,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 170 transitions, 1729 flow [2024-06-21 20:41:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:41:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:41:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 20:41:24,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202156334231806 [2024-06-21 20:41:24,328 INFO L175 Difference]: Start difference. First operand has 89 places, 132 transitions, 1213 flow. Second operand 7 states and 193 transitions. [2024-06-21 20:41:24,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 170 transitions, 1729 flow [2024-06-21 20:41:24,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 170 transitions, 1584 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 20:41:24,406 INFO L231 Difference]: Finished difference. Result has 93 places, 132 transitions, 1240 flow [2024-06-21 20:41:24,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1240, PETRI_PLACES=93, PETRI_TRANSITIONS=132} [2024-06-21 20:41:24,407 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-21 20:41:24,407 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 132 transitions, 1240 flow [2024-06-21 20:41:24,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:24,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:24,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:24,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:41:24,408 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:41:24,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1191976963, now seen corresponding path program 1 times [2024-06-21 20:41:24,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:24,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033295828] [2024-06-21 20:41:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:24,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:25,032 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 20:41:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033295828] [2024-06-21 20:41:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033295828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:25,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:25,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:41:25,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262488368] [2024-06-21 20:41:25,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:25,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:41:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:41:25,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:41:25,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:41:25,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 132 transitions, 1240 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:25,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:25,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:41:25,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:26,509 INFO L124 PetriNetUnfolderBase]: 9680/14029 cut-off events. [2024-06-21 20:41:26,509 INFO L125 PetriNetUnfolderBase]: For 98326/98358 co-relation queries the response was YES. [2024-06-21 20:41:26,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58225 conditions, 14029 events. 9680/14029 cut-off events. For 98326/98358 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 82766 event pairs, 4572 based on Foata normal form. 20/14013 useless extension candidates. Maximal degree in co-relation 58191. Up to 13044 conditions per place. [2024-06-21 20:41:26,611 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 126 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2024-06-21 20:41:26,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 151 transitions, 1592 flow [2024-06-21 20:41:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:41:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:41:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 20:41:26,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-21 20:41:26,612 INFO L175 Difference]: Start difference. First operand has 93 places, 132 transitions, 1240 flow. Second operand 5 states and 133 transitions. [2024-06-21 20:41:26,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 151 transitions, 1592 flow [2024-06-21 20:41:26,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 151 transitions, 1399 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:26,693 INFO L231 Difference]: Finished difference. Result has 92 places, 136 transitions, 1118 flow [2024-06-21 20:41:26,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1118, PETRI_PLACES=92, PETRI_TRANSITIONS=136} [2024-06-21 20:41:26,694 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-21 20:41:26,694 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 136 transitions, 1118 flow [2024-06-21 20:41:26,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:26,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:26,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:26,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:41:26,695 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 20:41:26,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:26,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1828093313, now seen corresponding path program 1 times [2024-06-21 20:41:26,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:26,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381961752] [2024-06-21 20:41:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:26,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:27,487 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 20:41:27,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:27,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381961752] [2024-06-21 20:41:27,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381961752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:27,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:27,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:41:27,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946255295] [2024-06-21 20:41:27,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:27,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:41:27,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:27,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:41:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:41:27,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:27,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 136 transitions, 1118 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:27,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:27,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:27,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:29,129 INFO L124 PetriNetUnfolderBase]: 9450/13211 cut-off events. [2024-06-21 20:41:29,129 INFO L125 PetriNetUnfolderBase]: For 107907/108082 co-relation queries the response was YES. [2024-06-21 20:41:29,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 13211 events. 9450/13211 cut-off events. For 107907/108082 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 73639 event pairs, 4270 based on Foata normal form. 94/13277 useless extension candidates. Maximal degree in co-relation 58934. Up to 12364 conditions per place. [2024-06-21 20:41:29,220 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 93 selfloop transitions, 86 changer transitions 0/187 dead transitions. [2024-06-21 20:41:29,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 187 transitions, 1804 flow [2024-06-21 20:41:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:41:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:41:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 20:41:29,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-21 20:41:29,222 INFO L175 Difference]: Start difference. First operand has 92 places, 136 transitions, 1118 flow. Second operand 7 states and 198 transitions. [2024-06-21 20:41:29,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 187 transitions, 1804 flow [2024-06-21 20:41:29,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 187 transitions, 1763 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 20:41:29,296 INFO L231 Difference]: Finished difference. Result has 96 places, 144 transitions, 1376 flow [2024-06-21 20:41:29,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1376, PETRI_PLACES=96, PETRI_TRANSITIONS=144} [2024-06-21 20:41:29,297 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-21 20:41:29,297 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 144 transitions, 1376 flow [2024-06-21 20:41:29,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:29,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:29,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:29,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:41:29,298 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 20:41:29,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:29,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1828087733, now seen corresponding path program 2 times [2024-06-21 20:41:29,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:29,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673727575] [2024-06-21 20:41:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:30,283 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 20:41:30,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:30,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673727575] [2024-06-21 20:41:30,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673727575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:30,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450046109] [2024-06-21 20:41:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:30,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:30,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:30,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:30,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 144 transitions, 1376 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 20:41:30,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:30,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:30,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:32,083 INFO L124 PetriNetUnfolderBase]: 9488/13278 cut-off events. [2024-06-21 20:41:32,083 INFO L125 PetriNetUnfolderBase]: For 122119/122283 co-relation queries the response was YES. [2024-06-21 20:41:32,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60865 conditions, 13278 events. 9488/13278 cut-off events. For 122119/122283 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 74303 event pairs, 4261 based on Foata normal form. 88/13344 useless extension candidates. Maximal degree in co-relation 60829. Up to 12404 conditions per place. [2024-06-21 20:41:32,182 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 100 selfloop transitions, 93 changer transitions 0/201 dead transitions. [2024-06-21 20:41:32,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 201 transitions, 2134 flow [2024-06-21 20:41:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 20:41:32,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 20:41:32,184 INFO L175 Difference]: Start difference. First operand has 96 places, 144 transitions, 1376 flow. Second operand 8 states and 220 transitions. [2024-06-21 20:41:32,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 201 transitions, 2134 flow [2024-06-21 20:41:32,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 201 transitions, 1830 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:32,294 INFO L231 Difference]: Finished difference. Result has 98 places, 152 transitions, 1402 flow [2024-06-21 20:41:32,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=98, PETRI_TRANSITIONS=152} [2024-06-21 20:41:32,295 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-21 20:41:32,295 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 152 transitions, 1402 flow [2024-06-21 20:41:32,295 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 20:41:32,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:32,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:32,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:41:32,295 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 20:41:32,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1129886793, now seen corresponding path program 3 times [2024-06-21 20:41:32,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:32,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276443291] [2024-06-21 20:41:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:32,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:33,245 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 20:41:33,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276443291] [2024-06-21 20:41:33,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276443291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:33,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:33,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026192722] [2024-06-21 20:41:33,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:33,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:33,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:33,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:33,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 152 transitions, 1402 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 20:41:33,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:33,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:33,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:35,150 INFO L124 PetriNetUnfolderBase]: 9528/13354 cut-off events. [2024-06-21 20:41:35,151 INFO L125 PetriNetUnfolderBase]: For 134154/134381 co-relation queries the response was YES. [2024-06-21 20:41:35,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62158 conditions, 13354 events. 9528/13354 cut-off events. For 134154/134381 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 74918 event pairs, 4259 based on Foata normal form. 149/13474 useless extension candidates. Maximal degree in co-relation 62122. Up to 12446 conditions per place. [2024-06-21 20:41:35,261 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 103 selfloop transitions, 105 changer transitions 0/216 dead transitions. [2024-06-21 20:41:35,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 216 transitions, 2220 flow [2024-06-21 20:41:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-21 20:41:35,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 20:41:35,262 INFO L175 Difference]: Start difference. First operand has 98 places, 152 transitions, 1402 flow. Second operand 9 states and 243 transitions. [2024-06-21 20:41:35,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 216 transitions, 2220 flow [2024-06-21 20:41:35,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 216 transitions, 2039 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:41:35,368 INFO L231 Difference]: Finished difference. Result has 102 places, 160 transitions, 1566 flow [2024-06-21 20:41:35,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1566, PETRI_PLACES=102, PETRI_TRANSITIONS=160} [2024-06-21 20:41:35,369 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-21 20:41:35,369 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 160 transitions, 1566 flow [2024-06-21 20:41:35,369 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 20:41:35,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:35,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:35,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:41:35,369 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:41:35,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1034364685, now seen corresponding path program 4 times [2024-06-21 20:41:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842498077] [2024-06-21 20:41:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:36,328 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 20:41:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:36,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842498077] [2024-06-21 20:41:36,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842498077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:36,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:36,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:36,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850401148] [2024-06-21 20:41:36,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:36,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:36,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:36,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 160 transitions, 1566 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 20:41:36,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:36,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:36,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:38,127 INFO L124 PetriNetUnfolderBase]: 9512/13298 cut-off events. [2024-06-21 20:41:38,128 INFO L125 PetriNetUnfolderBase]: For 148984/149186 co-relation queries the response was YES. [2024-06-21 20:41:38,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62961 conditions, 13298 events. 9512/13298 cut-off events. For 148984/149186 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 74177 event pairs, 4282 based on Foata normal form. 109/13372 useless extension candidates. Maximal degree in co-relation 62924. Up to 12430 conditions per place. [2024-06-21 20:41:38,239 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 92 selfloop transitions, 103 changer transitions 0/203 dead transitions. [2024-06-21 20:41:38,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 203 transitions, 2112 flow [2024-06-21 20:41:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 20:41:38,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-21 20:41:38,241 INFO L175 Difference]: Start difference. First operand has 102 places, 160 transitions, 1566 flow. Second operand 8 states and 215 transitions. [2024-06-21 20:41:38,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 203 transitions, 2112 flow [2024-06-21 20:41:38,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 203 transitions, 1793 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 20:41:38,375 INFO L231 Difference]: Finished difference. Result has 103 places, 160 transitions, 1468 flow [2024-06-21 20:41:38,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1468, PETRI_PLACES=103, PETRI_TRANSITIONS=160} [2024-06-21 20:41:38,375 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-21 20:41:38,376 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 160 transitions, 1468 flow [2024-06-21 20:41:38,376 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 20:41:38,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:38,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:38,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:41:38,376 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 20:41:38,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1026735988, now seen corresponding path program 1 times [2024-06-21 20:41:38,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:38,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286067148] [2024-06-21 20:41:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:39,363 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 20:41:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286067148] [2024-06-21 20:41:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286067148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:39,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:39,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:39,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736682268] [2024-06-21 20:41:39,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:39,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:39,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:39,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 160 transitions, 1468 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 20:41:39,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:39,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:39,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:41,256 INFO L124 PetriNetUnfolderBase]: 10339/14853 cut-off events. [2024-06-21 20:41:41,256 INFO L125 PetriNetUnfolderBase]: For 167183/167185 co-relation queries the response was YES. [2024-06-21 20:41:41,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68616 conditions, 14853 events. 10339/14853 cut-off events. For 167183/167185 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 85863 event pairs, 4590 based on Foata normal form. 6/14829 useless extension candidates. Maximal degree in co-relation 68578. Up to 13961 conditions per place. [2024-06-21 20:41:41,367 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 177 selfloop transitions, 21 changer transitions 0/206 dead transitions. [2024-06-21 20:41:41,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 206 transitions, 2055 flow [2024-06-21 20:41:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 20:41:41,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-21 20:41:41,369 INFO L175 Difference]: Start difference. First operand has 103 places, 160 transitions, 1468 flow. Second operand 8 states and 207 transitions. [2024-06-21 20:41:41,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 206 transitions, 2055 flow [2024-06-21 20:41:41,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 206 transitions, 1773 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:41:41,511 INFO L231 Difference]: Finished difference. Result has 104 places, 167 transitions, 1320 flow [2024-06-21 20:41:41,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=104, PETRI_TRANSITIONS=167} [2024-06-21 20:41:41,512 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-21 20:41:41,512 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 167 transitions, 1320 flow [2024-06-21 20:41:41,512 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 20:41:41,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:41,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:41,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:41:41,513 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 20:41:41,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash -954468852, now seen corresponding path program 1 times [2024-06-21 20:41:41,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:41,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188868196] [2024-06-21 20:41:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:41,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:42,316 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 20:41:42,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:42,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188868196] [2024-06-21 20:41:42,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188868196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:42,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:42,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:41:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188936261] [2024-06-21 20:41:42,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:42,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:41:42,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:42,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:41:42,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:41:42,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:42,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 167 transitions, 1320 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:42,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:42,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:42,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:44,077 INFO L124 PetriNetUnfolderBase]: 11229/15714 cut-off events. [2024-06-21 20:41:44,077 INFO L125 PetriNetUnfolderBase]: For 214974/215181 co-relation queries the response was YES. [2024-06-21 20:41:44,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77061 conditions, 15714 events. 11229/15714 cut-off events. For 214974/215181 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 89508 event pairs, 4210 based on Foata normal form. 26/15721 useless extension candidates. Maximal degree in co-relation 77021. Up to 14821 conditions per place. [2024-06-21 20:41:44,213 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 158 selfloop transitions, 46 changer transitions 0/213 dead transitions. [2024-06-21 20:41:44,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 213 transitions, 2034 flow [2024-06-21 20:41:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:41:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:41:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 20:41:44,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-21 20:41:44,215 INFO L175 Difference]: Start difference. First operand has 104 places, 167 transitions, 1320 flow. Second operand 7 states and 192 transitions. [2024-06-21 20:41:44,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 213 transitions, 2034 flow [2024-06-21 20:41:44,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 213 transitions, 1964 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:41:44,390 INFO L231 Difference]: Finished difference. Result has 106 places, 173 transitions, 1438 flow [2024-06-21 20:41:44,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1438, PETRI_PLACES=106, PETRI_TRANSITIONS=173} [2024-06-21 20:41:44,390 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-21 20:41:44,390 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 173 transitions, 1438 flow [2024-06-21 20:41:44,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:44,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:44,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:44,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:41:44,391 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 20:41:44,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:44,391 INFO L85 PathProgramCache]: Analyzing trace with hash -840789372, now seen corresponding path program 2 times [2024-06-21 20:41:44,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:44,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865317729] [2024-06-21 20:41:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:44,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:45,221 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 20:41:45,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:45,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865317729] [2024-06-21 20:41:45,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865317729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:45,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:45,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:41:45,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184266858] [2024-06-21 20:41:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:45,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:41:45,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:41:45,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:41:45,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:45,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 173 transitions, 1438 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:45,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:45,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:45,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:47,073 INFO L124 PetriNetUnfolderBase]: 11214/15674 cut-off events. [2024-06-21 20:41:47,073 INFO L125 PetriNetUnfolderBase]: For 242484/242677 co-relation queries the response was YES. [2024-06-21 20:41:47,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79747 conditions, 15674 events. 11214/15674 cut-off events. For 242484/242677 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 89083 event pairs, 4826 based on Foata normal form. 18/15669 useless extension candidates. Maximal degree in co-relation 79706. Up to 14936 conditions per place. [2024-06-21 20:41:47,222 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 157 selfloop transitions, 45 changer transitions 0/211 dead transitions. [2024-06-21 20:41:47,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 211 transitions, 1972 flow [2024-06-21 20:41:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:41:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:41:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 20:41:47,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 20:41:47,223 INFO L175 Difference]: Start difference. First operand has 106 places, 173 transitions, 1438 flow. Second operand 7 states and 189 transitions. [2024-06-21 20:41:47,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 211 transitions, 1972 flow [2024-06-21 20:41:47,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 211 transitions, 1871 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:41:47,380 INFO L231 Difference]: Finished difference. Result has 110 places, 173 transitions, 1439 flow [2024-06-21 20:41:47,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1439, PETRI_PLACES=110, PETRI_TRANSITIONS=173} [2024-06-21 20:41:47,380 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-21 20:41:47,380 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 173 transitions, 1439 flow [2024-06-21 20:41:47,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:47,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:47,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:47,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:41:47,381 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:41:47,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash 422896408, now seen corresponding path program 1 times [2024-06-21 20:41:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85782852] [2024-06-21 20:41:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:48,094 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 20:41:48,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85782852] [2024-06-21 20:41:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85782852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:48,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:48,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:41:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790636348] [2024-06-21 20:41:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:48,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:41:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:41:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:41:48,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:48,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 173 transitions, 1439 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:48,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:48,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:48,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:49,932 INFO L124 PetriNetUnfolderBase]: 11228/15772 cut-off events. [2024-06-21 20:41:49,932 INFO L125 PetriNetUnfolderBase]: For 263993/264022 co-relation queries the response was YES. [2024-06-21 20:41:50,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80678 conditions, 15772 events. 11228/15772 cut-off events. For 263993/264022 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88893 event pairs, 5060 based on Foata normal form. 20/15780 useless extension candidates. Maximal degree in co-relation 80635. Up to 15042 conditions per place. [2024-06-21 20:41:50,080 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 172 selfloop transitions, 24 changer transitions 0/212 dead transitions. [2024-06-21 20:41:50,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 212 transitions, 2095 flow [2024-06-21 20:41:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:41:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:41:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 20:41:50,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-21 20:41:50,081 INFO L175 Difference]: Start difference. First operand has 110 places, 173 transitions, 1439 flow. Second operand 6 states and 163 transitions. [2024-06-21 20:41:50,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 212 transitions, 2095 flow [2024-06-21 20:41:50,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 212 transitions, 1993 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:50,314 INFO L231 Difference]: Finished difference. Result has 110 places, 181 transitions, 1491 flow [2024-06-21 20:41:50,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1491, PETRI_PLACES=110, PETRI_TRANSITIONS=181} [2024-06-21 20:41:50,315 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-21 20:41:50,315 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 181 transitions, 1491 flow [2024-06-21 20:41:50,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:50,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:50,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:50,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:41:50,316 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 20:41:50,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1294151098, now seen corresponding path program 2 times [2024-06-21 20:41:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:50,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273731825] [2024-06-21 20:41:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:50,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:51,018 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 20:41:51,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:51,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273731825] [2024-06-21 20:41:51,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273731825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:51,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:51,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:41:51,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215253102] [2024-06-21 20:41:51,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:41:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:41:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:41:51,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:51,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 181 transitions, 1491 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:51,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:51,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:51,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:52,826 INFO L124 PetriNetUnfolderBase]: 11214/15764 cut-off events. [2024-06-21 20:41:52,827 INFO L125 PetriNetUnfolderBase]: For 293630/293678 co-relation queries the response was YES. [2024-06-21 20:41:52,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83892 conditions, 15764 events. 11214/15764 cut-off events. For 293630/293678 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 89054 event pairs, 5047 based on Foata normal form. 31/15784 useless extension candidates. Maximal degree in co-relation 83848. Up to 15030 conditions per place. [2024-06-21 20:41:52,968 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 164 selfloop transitions, 24 changer transitions 0/204 dead transitions. [2024-06-21 20:41:52,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 204 transitions, 1945 flow [2024-06-21 20:41:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:41:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:41:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:41:52,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-21 20:41:52,969 INFO L175 Difference]: Start difference. First operand has 110 places, 181 transitions, 1491 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:41:52,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 204 transitions, 1945 flow [2024-06-21 20:41:53,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 204 transitions, 1877 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 20:41:53,327 INFO L231 Difference]: Finished difference. Result has 114 places, 181 transitions, 1480 flow [2024-06-21 20:41:53,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1480, PETRI_PLACES=114, PETRI_TRANSITIONS=181} [2024-06-21 20:41:53,328 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-21 20:41:53,328 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 181 transitions, 1480 flow [2024-06-21 20:41:53,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:53,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:53,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:53,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:41:53,328 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 20:41:53,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:53,329 INFO L85 PathProgramCache]: Analyzing trace with hash 428616280, now seen corresponding path program 1 times [2024-06-21 20:41:53,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:53,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221951741] [2024-06-21 20:41:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:53,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:54,012 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 20:41:54,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:54,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221951741] [2024-06-21 20:41:54,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221951741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:54,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:54,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:41:54,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330803439] [2024-06-21 20:41:54,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:54,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:41:54,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:54,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:41:54,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:41:54,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:54,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 181 transitions, 1480 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:54,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:54,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:54,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:55,919 INFO L124 PetriNetUnfolderBase]: 10410/14922 cut-off events. [2024-06-21 20:41:55,920 INFO L125 PetriNetUnfolderBase]: For 274364/274366 co-relation queries the response was YES. [2024-06-21 20:41:55,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78960 conditions, 14922 events. 10410/14922 cut-off events. For 274364/274366 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 85739 event pairs, 4426 based on Foata normal form. 4/14895 useless extension candidates. Maximal degree in co-relation 78914. Up to 14053 conditions per place. [2024-06-21 20:41:56,035 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 186 selfloop transitions, 21 changer transitions 0/215 dead transitions. [2024-06-21 20:41:56,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 215 transitions, 2150 flow [2024-06-21 20:41:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:41:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:41:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 20:41:56,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-21 20:41:56,036 INFO L175 Difference]: Start difference. First operand has 114 places, 181 transitions, 1480 flow. Second operand 6 states and 160 transitions. [2024-06-21 20:41:56,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 215 transitions, 2150 flow [2024-06-21 20:41:56,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 215 transitions, 2080 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:41:56,249 INFO L231 Difference]: Finished difference. Result has 115 places, 189 transitions, 1565 flow [2024-06-21 20:41:56,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1565, PETRI_PLACES=115, PETRI_TRANSITIONS=189} [2024-06-21 20:41:56,249 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-21 20:41:56,250 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 189 transitions, 1565 flow [2024-06-21 20:41:56,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:56,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:56,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:56,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:41:56,250 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 20:41:56,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1317947580, now seen corresponding path program 2 times [2024-06-21 20:41:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:56,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634101151] [2024-06-21 20:41:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:56,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:56,920 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 20:41:56,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:56,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634101151] [2024-06-21 20:41:56,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634101151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:56,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:56,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:41:56,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089190349] [2024-06-21 20:41:56,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:56,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:41:56,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:56,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:41:56,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:41:57,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:41:57,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 189 transitions, 1565 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:57,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:57,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:41:57,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:58,761 INFO L124 PetriNetUnfolderBase]: 10396/14908 cut-off events. [2024-06-21 20:41:58,762 INFO L125 PetriNetUnfolderBase]: For 302270/302277 co-relation queries the response was YES. [2024-06-21 20:41:58,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81850 conditions, 14908 events. 10396/14908 cut-off events. For 302270/302277 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 85756 event pairs, 4403 based on Foata normal form. 8/14889 useless extension candidates. Maximal degree in co-relation 81803. Up to 14041 conditions per place. [2024-06-21 20:41:58,865 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 180 selfloop transitions, 21 changer transitions 0/209 dead transitions. [2024-06-21 20:41:58,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 209 transitions, 2027 flow [2024-06-21 20:41:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:41:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:41:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:41:58,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-21 20:41:58,866 INFO L175 Difference]: Start difference. First operand has 115 places, 189 transitions, 1565 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:41:58,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 209 transitions, 2027 flow [2024-06-21 20:41:59,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 209 transitions, 1947 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 20:41:59,070 INFO L231 Difference]: Finished difference. Result has 119 places, 189 transitions, 1536 flow [2024-06-21 20:41:59,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1536, PETRI_PLACES=119, PETRI_TRANSITIONS=189} [2024-06-21 20:41:59,070 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-21 20:41:59,070 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 189 transitions, 1536 flow [2024-06-21 20:41:59,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:59,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:59,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:59,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:41:59,071 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 20:41:59,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash -290147534, now seen corresponding path program 1 times [2024-06-21 20:41:59,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:59,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104370667] [2024-06-21 20:41:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:59,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:59,983 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 20:41:59,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:59,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104370667] [2024-06-21 20:41:59,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104370667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:59,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:59,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:59,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86653139] [2024-06-21 20:41:59,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:59,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:59,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:59,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:59,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:00,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:42:00,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 189 transitions, 1536 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:00,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:00,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:42:00,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:02,036 INFO L124 PetriNetUnfolderBase]: 11524/16137 cut-off events. [2024-06-21 20:42:02,036 INFO L125 PetriNetUnfolderBase]: For 390453/390670 co-relation queries the response was YES. [2024-06-21 20:42:02,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92098 conditions, 16137 events. 11524/16137 cut-off events. For 390453/390670 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 92173 event pairs, 4119 based on Foata normal form. 63/16185 useless extension candidates. Maximal degree in co-relation 92049. Up to 14395 conditions per place. [2024-06-21 20:42:02,189 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 106 changer transitions 0/245 dead transitions. [2024-06-21 20:42:02,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 245 transitions, 2390 flow [2024-06-21 20:42:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 20:42:02,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 20:42:02,190 INFO L175 Difference]: Start difference. First operand has 119 places, 189 transitions, 1536 flow. Second operand 8 states and 224 transitions. [2024-06-21 20:42:02,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 245 transitions, 2390 flow [2024-06-21 20:42:02,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 245 transitions, 2323 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:02,413 INFO L231 Difference]: Finished difference. Result has 121 places, 193 transitions, 1778 flow [2024-06-21 20:42:02,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1778, PETRI_PLACES=121, PETRI_TRANSITIONS=193} [2024-06-21 20:42:02,413 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-21 20:42:02,414 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 193 transitions, 1778 flow [2024-06-21 20:42:02,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:02,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:02,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:02,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:42:02,414 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 20:42:02,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1281866224, now seen corresponding path program 2 times [2024-06-21 20:42:02,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:02,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379776834] [2024-06-21 20:42:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:02,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:03,323 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 20:42:03,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:03,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379776834] [2024-06-21 20:42:03,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379776834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:03,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:03,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:03,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848080466] [2024-06-21 20:42:03,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:03,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:03,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:03,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:03,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:03,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:42:03,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 193 transitions, 1778 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:03,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:03,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:42:03,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:05,679 INFO L124 PetriNetUnfolderBase]: 11748/16501 cut-off events. [2024-06-21 20:42:05,679 INFO L125 PetriNetUnfolderBase]: For 435562/435738 co-relation queries the response was YES. [2024-06-21 20:42:05,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96722 conditions, 16501 events. 11748/16501 cut-off events. For 435562/435738 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 94925 event pairs, 4551 based on Foata normal form. 99/16575 useless extension candidates. Maximal degree in co-relation 96673. Up to 15231 conditions per place. [2024-06-21 20:42:05,853 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 128 selfloop transitions, 107 changer transitions 0/244 dead transitions. [2024-06-21 20:42:05,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 244 transitions, 2470 flow [2024-06-21 20:42:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 20:42:05,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 20:42:05,855 INFO L175 Difference]: Start difference. First operand has 121 places, 193 transitions, 1778 flow. Second operand 8 states and 220 transitions. [2024-06-21 20:42:05,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 244 transitions, 2470 flow [2024-06-21 20:42:06,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 244 transitions, 2333 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:42:06,116 INFO L231 Difference]: Finished difference. Result has 125 places, 196 transitions, 1932 flow [2024-06-21 20:42:06,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1932, PETRI_PLACES=125, PETRI_TRANSITIONS=196} [2024-06-21 20:42:06,116 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-21 20:42:06,116 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 196 transitions, 1932 flow [2024-06-21 20:42:06,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:06,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:06,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:06,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:42:06,117 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 20:42:06,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:06,117 INFO L85 PathProgramCache]: Analyzing trace with hash 331477576, now seen corresponding path program 3 times [2024-06-21 20:42:06,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:06,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388520700] [2024-06-21 20:42:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:06,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:07,161 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 20:42:07,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:07,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388520700] [2024-06-21 20:42:07,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388520700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:07,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:07,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:07,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207210510] [2024-06-21 20:42:07,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:07,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:07,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:07,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:07,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:42:07,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 196 transitions, 1932 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:07,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:07,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:42:07,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:09,317 INFO L124 PetriNetUnfolderBase]: 11780/16568 cut-off events. [2024-06-21 20:42:09,318 INFO L125 PetriNetUnfolderBase]: For 465738/465980 co-relation queries the response was YES. [2024-06-21 20:42:09,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99593 conditions, 16568 events. 11780/16568 cut-off events. For 465738/465980 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 95796 event pairs, 4761 based on Foata normal form. 91/16633 useless extension candidates. Maximal degree in co-relation 99542. Up to 15171 conditions per place. [2024-06-21 20:42:09,485 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 128 selfloop transitions, 110 changer transitions 0/247 dead transitions. [2024-06-21 20:42:09,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 247 transitions, 2620 flow [2024-06-21 20:42:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 20:42:09,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-21 20:42:09,487 INFO L175 Difference]: Start difference. First operand has 125 places, 196 transitions, 1932 flow. Second operand 8 states and 222 transitions. [2024-06-21 20:42:09,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 247 transitions, 2620 flow [2024-06-21 20:42:09,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 247 transitions, 2383 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:09,843 INFO L231 Difference]: Finished difference. Result has 127 places, 198 transitions, 1976 flow [2024-06-21 20:42:09,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1976, PETRI_PLACES=127, PETRI_TRANSITIONS=198} [2024-06-21 20:42:09,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-21 20:42:09,843 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 198 transitions, 1976 flow [2024-06-21 20:42:09,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:09,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:09,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:09,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:42:09,844 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:42:09,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1216281800, now seen corresponding path program 1 times [2024-06-21 20:42:09,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:09,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089999673] [2024-06-21 20:42:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:09,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:10,659 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 20:42:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:10,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089999673] [2024-06-21 20:42:10,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089999673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:10,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:10,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:42:10,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857733865] [2024-06-21 20:42:10,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:10,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:42:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:42:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:42:10,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:42:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 198 transitions, 1976 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:42:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:13,034 INFO L124 PetriNetUnfolderBase]: 12539/17562 cut-off events. [2024-06-21 20:42:13,034 INFO L125 PetriNetUnfolderBase]: For 500967/500994 co-relation queries the response was YES. [2024-06-21 20:42:13,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105153 conditions, 17562 events. 12539/17562 cut-off events. For 500967/500994 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 98880 event pairs, 4870 based on Foata normal form. 34/17588 useless extension candidates. Maximal degree in co-relation 105101. Up to 16467 conditions per place. [2024-06-21 20:42:13,228 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 186 selfloop transitions, 65 changer transitions 0/258 dead transitions. [2024-06-21 20:42:13,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 258 transitions, 3022 flow [2024-06-21 20:42:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:42:13,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:42:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 20:42:13,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-21 20:42:13,229 INFO L175 Difference]: Start difference. First operand has 127 places, 198 transitions, 1976 flow. Second operand 7 states and 194 transitions. [2024-06-21 20:42:13,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 258 transitions, 3022 flow [2024-06-21 20:42:13,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 258 transitions, 2773 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:13,693 INFO L231 Difference]: Finished difference. Result has 129 places, 213 transitions, 2107 flow [2024-06-21 20:42:13,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2107, PETRI_PLACES=129, PETRI_TRANSITIONS=213} [2024-06-21 20:42:13,698 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-21 20:42:13,698 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 213 transitions, 2107 flow [2024-06-21 20:42:13,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:13,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:13,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:13,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:42:13,698 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:42:13,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:13,698 INFO L85 PathProgramCache]: Analyzing trace with hash -302771640, now seen corresponding path program 4 times [2024-06-21 20:42:13,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:13,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437400636] [2024-06-21 20:42:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:13,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:14,627 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 20:42:14,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:14,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437400636] [2024-06-21 20:42:14,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437400636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:14,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:14,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:14,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862466438] [2024-06-21 20:42:14,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:14,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:14,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:14,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:42:14,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 213 transitions, 2107 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:14,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:14,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:42:14,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:17,295 INFO L124 PetriNetUnfolderBase]: 12113/17120 cut-off events. [2024-06-21 20:42:17,295 INFO L125 PetriNetUnfolderBase]: For 554153/554398 co-relation queries the response was YES. [2024-06-21 20:42:17,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108596 conditions, 17120 events. 12113/17120 cut-off events. For 554153/554398 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 99838 event pairs, 4186 based on Foata normal form. 164/17254 useless extension candidates. Maximal degree in co-relation 108542. Up to 15521 conditions per place. [2024-06-21 20:42:17,505 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 151 selfloop transitions, 112 changer transitions 0/272 dead transitions. [2024-06-21 20:42:17,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 272 transitions, 3071 flow [2024-06-21 20:42:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-21 20:42:17,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-21 20:42:17,507 INFO L175 Difference]: Start difference. First operand has 129 places, 213 transitions, 2107 flow. Second operand 8 states and 228 transitions. [2024-06-21 20:42:17,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 272 transitions, 3071 flow [2024-06-21 20:42:17,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 272 transitions, 2980 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 20:42:17,965 INFO L231 Difference]: Finished difference. Result has 135 places, 217 transitions, 2357 flow [2024-06-21 20:42:17,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2357, PETRI_PLACES=135, PETRI_TRANSITIONS=217} [2024-06-21 20:42:17,965 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 20:42:17,966 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 217 transitions, 2357 flow [2024-06-21 20:42:17,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:17,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:17,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:17,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:42:17,966 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:42:17,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash -155988674, now seen corresponding path program 5 times [2024-06-21 20:42:17,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:17,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997616423] [2024-06-21 20:42:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:17,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:19,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:19,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997616423] [2024-06-21 20:42:19,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997616423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:19,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:19,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:19,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174972022] [2024-06-21 20:42:19,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:19,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:19,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:19,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:19,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:42:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 217 transitions, 2357 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:42:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:22,091 INFO L124 PetriNetUnfolderBase]: 12241/17317 cut-off events. [2024-06-21 20:42:22,092 INFO L125 PetriNetUnfolderBase]: For 596164/596411 co-relation queries the response was YES. [2024-06-21 20:42:22,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111616 conditions, 17317 events. 12241/17317 cut-off events. For 596164/596411 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 101288 event pairs, 4848 based on Foata normal form. 170/17457 useless extension candidates. Maximal degree in co-relation 111560. Up to 16058 conditions per place. [2024-06-21 20:42:22,288 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 154 selfloop transitions, 107 changer transitions 0/270 dead transitions. [2024-06-21 20:42:22,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 270 transitions, 3115 flow [2024-06-21 20:42:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 20:42:22,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-21 20:42:22,290 INFO L175 Difference]: Start difference. First operand has 135 places, 217 transitions, 2357 flow. Second operand 8 states and 222 transitions. [2024-06-21 20:42:22,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 270 transitions, 3115 flow [2024-06-21 20:42:22,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 270 transitions, 2956 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:42:22,762 INFO L231 Difference]: Finished difference. Result has 139 places, 219 transitions, 2484 flow [2024-06-21 20:42:22,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2484, PETRI_PLACES=139, PETRI_TRANSITIONS=219} [2024-06-21 20:42:22,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-21 20:42:22,763 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 219 transitions, 2484 flow [2024-06-21 20:42:22,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:22,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:22,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:22,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:42:22,763 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:42:22,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash -297261390, now seen corresponding path program 6 times [2024-06-21 20:42:22,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:22,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656936298] [2024-06-21 20:42:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:24,042 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 20:42:24,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:24,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656936298] [2024-06-21 20:42:24,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656936298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:24,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:24,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:24,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087132569] [2024-06-21 20:42:24,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:24,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:24,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:42:24,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 219 transitions, 2484 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 20:42:24,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:24,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:42:24,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:27,254 INFO L124 PetriNetUnfolderBase]: 12369/17509 cut-off events. [2024-06-21 20:42:27,255 INFO L125 PetriNetUnfolderBase]: For 633820/634052 co-relation queries the response was YES. [2024-06-21 20:42:27,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114429 conditions, 17509 events. 12369/17509 cut-off events. For 633820/634052 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 102790 event pairs, 4861 based on Foata normal form. 119/17604 useless extension candidates. Maximal degree in co-relation 114371. Up to 16250 conditions per place. [2024-06-21 20:42:27,619 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 163 selfloop transitions, 106 changer transitions 0/278 dead transitions. [2024-06-21 20:42:27,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 278 transitions, 3282 flow [2024-06-21 20:42:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-21 20:42:27,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115303983228512 [2024-06-21 20:42:27,620 INFO L175 Difference]: Start difference. First operand has 139 places, 219 transitions, 2484 flow. Second operand 9 states and 244 transitions. [2024-06-21 20:42:27,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 278 transitions, 3282 flow [2024-06-21 20:42:28,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 278 transitions, 3044 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:28,013 INFO L231 Difference]: Finished difference. Result has 142 places, 221 transitions, 2532 flow [2024-06-21 20:42:28,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2532, PETRI_PLACES=142, PETRI_TRANSITIONS=221} [2024-06-21 20:42:28,013 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-21 20:42:28,014 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 221 transitions, 2532 flow [2024-06-21 20:42:28,014 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 20:42:28,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:28,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:28,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:42:28,014 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 20:42:28,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1063213820, now seen corresponding path program 2 times [2024-06-21 20:42:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:28,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430544006] [2024-06-21 20:42:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:28,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:28,874 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 20:42:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430544006] [2024-06-21 20:42:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430544006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:28,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:28,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:42:28,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952367085] [2024-06-21 20:42:28,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:28,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:42:28,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:42:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:42:28,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:42:28,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 221 transitions, 2532 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:28,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:28,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:42:28,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:31,801 INFO L124 PetriNetUnfolderBase]: 13292/18711 cut-off events. [2024-06-21 20:42:31,801 INFO L125 PetriNetUnfolderBase]: For 674519/674538 co-relation queries the response was YES. [2024-06-21 20:42:31,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121542 conditions, 18711 events. 13292/18711 cut-off events. For 674519/674538 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 107104 event pairs, 5055 based on Foata normal form. 24/18727 useless extension candidates. Maximal degree in co-relation 121483. Up to 17472 conditions per place. [2024-06-21 20:42:31,958 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 189 selfloop transitions, 72 changer transitions 0/268 dead transitions. [2024-06-21 20:42:31,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 268 transitions, 3540 flow [2024-06-21 20:42:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:42:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:42:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 20:42:31,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-21 20:42:31,959 INFO L175 Difference]: Start difference. First operand has 142 places, 221 transitions, 2532 flow. Second operand 7 states and 188 transitions. [2024-06-21 20:42:31,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 268 transitions, 3540 flow [2024-06-21 20:42:32,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 268 transitions, 3300 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:32,599 INFO L231 Difference]: Finished difference. Result has 143 places, 231 transitions, 2607 flow [2024-06-21 20:42:32,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2607, PETRI_PLACES=143, PETRI_TRANSITIONS=231} [2024-06-21 20:42:32,599 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-21 20:42:32,600 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 231 transitions, 2607 flow [2024-06-21 20:42:32,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:32,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:32,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:32,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:42:32,600 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:42:32,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash 805578870, now seen corresponding path program 7 times [2024-06-21 20:42:32,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:32,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666780026] [2024-06-21 20:42:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:32,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:33,770 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 20:42:33,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666780026] [2024-06-21 20:42:33,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666780026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:33,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:33,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:33,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666673097] [2024-06-21 20:42:33,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:33,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:33,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:33,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:42:33,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 231 transitions, 2607 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 20:42:33,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:33,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:42:33,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:37,071 INFO L124 PetriNetUnfolderBase]: 12663/17948 cut-off events. [2024-06-21 20:42:37,071 INFO L125 PetriNetUnfolderBase]: For 710629/710852 co-relation queries the response was YES. [2024-06-21 20:42:37,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119219 conditions, 17948 events. 12663/17948 cut-off events. For 710629/710852 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 105883 event pairs, 4899 based on Foata normal form. 173/18093 useless extension candidates. Maximal degree in co-relation 119158. Up to 16664 conditions per place. [2024-06-21 20:42:37,268 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 178 selfloop transitions, 110 changer transitions 0/297 dead transitions. [2024-06-21 20:42:37,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 297 transitions, 3479 flow [2024-06-21 20:42:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:42:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:42:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-06-21 20:42:37,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-06-21 20:42:37,270 INFO L175 Difference]: Start difference. First operand has 143 places, 231 transitions, 2607 flow. Second operand 10 states and 267 transitions. [2024-06-21 20:42:37,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 297 transitions, 3479 flow [2024-06-21 20:42:37,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 297 transitions, 3346 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 20:42:37,975 INFO L231 Difference]: Finished difference. Result has 150 places, 233 transitions, 2772 flow [2024-06-21 20:42:37,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2772, PETRI_PLACES=150, PETRI_TRANSITIONS=233} [2024-06-21 20:42:37,976 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-21 20:42:37,976 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 233 transitions, 2772 flow [2024-06-21 20:42:37,976 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 20:42:37,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:37,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:37,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:42:37,976 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:42:37,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:37,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1341222948, now seen corresponding path program 8 times [2024-06-21 20:42:37,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:37,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147647985] [2024-06-21 20:42:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:37,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:39,086 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 20:42:39,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:39,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147647985] [2024-06-21 20:42:39,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147647985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:39,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:39,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154598912] [2024-06-21 20:42:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:39,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:42:39,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 233 transitions, 2772 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 20:42:39,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:39,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:42:39,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:42,116 INFO L124 PetriNetUnfolderBase]: 12609/17840 cut-off events. [2024-06-21 20:42:42,116 INFO L125 PetriNetUnfolderBase]: For 740126/740313 co-relation queries the response was YES. [2024-06-21 20:42:42,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119109 conditions, 17840 events. 12609/17840 cut-off events. For 740126/740313 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 104869 event pairs, 4898 based on Foata normal form. 118/17920 useless extension candidates. Maximal degree in co-relation 119047. Up to 16586 conditions per place. [2024-06-21 20:42:42,301 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 170 selfloop transitions, 108 changer transitions 0/287 dead transitions. [2024-06-21 20:42:42,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 287 transitions, 3524 flow [2024-06-21 20:42:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-21 20:42:42,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073375262054507 [2024-06-21 20:42:42,302 INFO L175 Difference]: Start difference. First operand has 150 places, 233 transitions, 2772 flow. Second operand 9 states and 242 transitions. [2024-06-21 20:42:42,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 287 transitions, 3524 flow [2024-06-21 20:42:43,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 287 transitions, 3250 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 20:42:43,193 INFO L231 Difference]: Finished difference. Result has 151 places, 233 transitions, 2726 flow [2024-06-21 20:42:43,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2726, PETRI_PLACES=151, PETRI_TRANSITIONS=233} [2024-06-21 20:42:43,193 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-21 20:42:43,194 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 233 transitions, 2726 flow [2024-06-21 20:42:43,194 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 20:42:43,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:43,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:43,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:42:43,194 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:42:43,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:43,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1886740373, now seen corresponding path program 1 times [2024-06-21 20:42:43,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:43,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707081069] [2024-06-21 20:42:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:43,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:44,241 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 20:42:44,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:44,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707081069] [2024-06-21 20:42:44,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707081069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:44,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:44,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:44,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845479727] [2024-06-21 20:42:44,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:44,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:44,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:44,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:42:44,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 233 transitions, 2726 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 20:42:44,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:44,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:42:44,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:47,516 INFO L124 PetriNetUnfolderBase]: 13423/18856 cut-off events. [2024-06-21 20:42:47,516 INFO L125 PetriNetUnfolderBase]: For 768545/768549 co-relation queries the response was YES. [2024-06-21 20:42:47,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124309 conditions, 18856 events. 13423/18856 cut-off events. For 768545/768549 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 107791 event pairs, 4901 based on Foata normal form. 8/18840 useless extension candidates. Maximal degree in co-relation 124246. Up to 17508 conditions per place. [2024-06-21 20:42:47,693 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 174 selfloop transitions, 115 changer transitions 0/296 dead transitions. [2024-06-21 20:42:47,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 296 transitions, 3626 flow [2024-06-21 20:42:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-21 20:42:47,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-21 20:42:47,695 INFO L175 Difference]: Start difference. First operand has 151 places, 233 transitions, 2726 flow. Second operand 9 states and 235 transitions. [2024-06-21 20:42:47,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 296 transitions, 3626 flow [2024-06-21 20:42:48,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 296 transitions, 3356 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 20:42:48,413 INFO L231 Difference]: Finished difference. Result has 153 places, 242 transitions, 2842 flow [2024-06-21 20:42:48,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2466, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2842, PETRI_PLACES=153, PETRI_TRANSITIONS=242} [2024-06-21 20:42:48,414 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-21 20:42:48,414 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 242 transitions, 2842 flow [2024-06-21 20:42:48,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 20:42:48,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:48,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:48,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:42:48,415 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:42:48,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:48,415 INFO L85 PathProgramCache]: Analyzing trace with hash 883227981, now seen corresponding path program 2 times [2024-06-21 20:42:48,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:48,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292619563] [2024-06-21 20:42:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:48,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:49,628 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 20:42:49,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:49,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292619563] [2024-06-21 20:42:49,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292619563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:49,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:49,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:49,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579858045] [2024-06-21 20:42:49,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:49,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:49,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 20:42:49,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 242 transitions, 2842 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 20:42:49,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:49,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 20:42:49,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand