./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix026_power.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix026_power.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:52:35,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:52:35,768 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:52:35,774 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:52:35,774 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:52:35,802 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:52:35,803 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:52:35,803 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:52:35,804 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:52:35,805 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:52:35,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:52:35,806 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:52:35,807 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:52:35,809 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:52:35,810 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:52:35,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:52:35,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:52:35,813 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:52:35,813 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:52:35,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:52:35,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:52:35,814 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:52:35,814 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:52:35,814 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:52:35,815 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:52:35,815 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:52:35,815 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:52:35,815 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:52:35,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:52:35,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:52:35,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:52:35,817 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:52:35,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:52:35,817 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:52:35,817 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:52:35,818 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:52:35,818 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:52:35,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:52:35,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:52:35,818 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:52:35,818 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:52:35,819 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:52:35,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:52:35,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:52:35,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:52:36,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:52:36,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:52:36,013 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:52:36,014 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:52:36,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix026_power.opt_tso.opt.yml/witness.yml [2024-06-21 20:52:36,215 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:52:36,215 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:52:36,216 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i [2024-06-21 20:52:37,154 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:52:37,377 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:52:37,378 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i [2024-06-21 20:52:37,397 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9020e4aea/ad8f5fb404be447c8813c25e8350b22d/FLAGf8861be9d [2024-06-21 20:52:37,407 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9020e4aea/ad8f5fb404be447c8813c25e8350b22d [2024-06-21 20:52:37,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:52:37,410 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:52:37,414 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:52:37,414 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:52:37,418 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:52:37,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:52:36" (1/2) ... [2024-06-21 20:52:37,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ecf14e4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:37, skipping insertion in model container [2024-06-21 20:52:37,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:52:36" (1/2) ... [2024-06-21 20:52:37,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c3fd649 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:37, skipping insertion in model container [2024-06-21 20:52:37,431 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:52:37" (2/2) ... [2024-06-21 20:52:37,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ecf14e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:37, skipping insertion in model container [2024-06-21 20:52:37,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:52:37" (2/2) ... [2024-06-21 20:52:37,431 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:52:37,529 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:52:37,531 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ((((((((((((((((((((((! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 20:52:37,531 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 20:52:37,531 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 20:52:37,531 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 20:52:37,531 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:52:37,532 INFO L106 edCorrectnessWitness]: ghost_update [L863-L863] multithreaded = 1; [2024-06-21 20:52:37,595 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:52:37,926 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:52:37,937 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 20:52:38,125 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:52:38,159 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:52:38,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38 WrapperNode [2024-06-21 20:52:38,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:52:38,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:52:38,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:52:38,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:52:38,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,232 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-21 20:52:38,233 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:52:38,233 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:52:38,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:52:38,236 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:52:38,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,248 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,260 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 20:52:38,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,261 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,287 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,290 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,299 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:52:38,300 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:52:38,300 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:52:38,300 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:52:38,301 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (1/1) ... [2024-06-21 20:52:38,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:52:38,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:52:38,358 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 20:52:38,398 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 20:52:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:52:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:52:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:52:38,413 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:52:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:52:38,413 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:52:38,414 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:52:38,414 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:52:38,414 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 20:52:38,414 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 20:52:38,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:52:38,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:52:38,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:52:38,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:52:38,416 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 20:52:38,565 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:52:38,567 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:52:38,973 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:52:38,974 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:52:39,150 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:52:39,150 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:52:39,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:52:39 BoogieIcfgContainer [2024-06-21 20:52:39,151 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:52:39,152 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:52:39,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:52:39,155 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:52:39,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:52:36" (1/4) ... [2024-06-21 20:52:39,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e503d4b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:52:39, skipping insertion in model container [2024-06-21 20:52:39,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:52:37" (2/4) ... [2024-06-21 20:52:39,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e503d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:52:39, skipping insertion in model container [2024-06-21 20:52:39,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:38" (3/4) ... [2024-06-21 20:52:39,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e503d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:52:39, skipping insertion in model container [2024-06-21 20:52:39,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:52:39" (4/4) ... [2024-06-21 20:52:39,157 INFO L112 eAbstractionObserver]: Analyzing ICFG mix026_power.opt_tso.opt.i [2024-06-21 20:52:39,171 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:52:39,172 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 20:52:39,172 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:52:39,211 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:52:39,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 20:52:39,257 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 20:52:39,257 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:52:39,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:52:39,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 20:52:39,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 20:52:39,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:52:39,309 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;@4fa8bc33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:52:39,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 20:52:39,312 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:52:39,312 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:52:39,312 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:52:39,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:39,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:52:39,313 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 20:52:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash 393972039, now seen corresponding path program 1 times [2024-06-21 20:52:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:39,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247274905] [2024-06-21 20:52:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:39,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:40,478 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 20:52:40,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:40,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247274905] [2024-06-21 20:52:40,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247274905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:40,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:40,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:52:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669989146] [2024-06-21 20:52:40,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:40,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:52:40,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:52:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:52:40,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 20:52:40,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:52:40,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:40,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 20:52:40,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:41,817 INFO L124 PetriNetUnfolderBase]: 8152/11667 cut-off events. [2024-06-21 20:52:41,817 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-21 20:52:41,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23154 conditions, 11667 events. 8152/11667 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65865 event pairs, 6174 based on Foata normal form. 1/11304 useless extension candidates. Maximal degree in co-relation 23141. Up to 11108 conditions per place. [2024-06-21 20:52:41,877 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 20:52:41,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-21 20:52:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:52:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:52:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-21 20:52:41,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-21 20:52:41,888 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 99 transitions. [2024-06-21 20:52:41,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-21 20:52:41,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:52:41,892 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 20:52:41,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 20:52:41,896 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 20:52:41,896 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 20:52:41,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:52:41,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:41,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:52:41,897 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 20:52:41,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash 650993028, now seen corresponding path program 1 times [2024-06-21 20:52:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:41,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109681871] [2024-06-21 20:52:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:41,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:42,454 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 20:52:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109681871] [2024-06-21 20:52:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109681871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:42,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:42,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:52:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412966287] [2024-06-21 20:52:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:42,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:52:42,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:42,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:52:42,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:52:42,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 20:52:42,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 20:52:42,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:42,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 20:52:42,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:43,852 INFO L124 PetriNetUnfolderBase]: 9527/13244 cut-off events. [2024-06-21 20:52:43,852 INFO L125 PetriNetUnfolderBase]: For 2494/2494 co-relation queries the response was YES. [2024-06-21 20:52:43,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29983 conditions, 13244 events. 9527/13244 cut-off events. For 2494/2494 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72021 event pairs, 5670 based on Foata normal form. 8/13249 useless extension candidates. Maximal degree in co-relation 29971. Up to 12883 conditions per place. [2024-06-21 20:52:43,919 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 20:52:43,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 325 flow [2024-06-21 20:52:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:52:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:52:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-21 20:52:43,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6105769230769231 [2024-06-21 20:52:43,921 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 127 transitions. [2024-06-21 20:52:43,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 325 flow [2024-06-21 20:52:43,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:52:43,923 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 20:52:43,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 20:52:43,924 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 20:52:43,924 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 20:52:43,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 20:52:43,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:43,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:43,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:52:43,925 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 20:52:43,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:43,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1957078821, now seen corresponding path program 1 times [2024-06-21 20:52:43,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:43,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059371558] [2024-06-21 20:52:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:43,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:45,198 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 20:52:45,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:45,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059371558] [2024-06-21 20:52:45,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059371558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:45,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:45,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:52:45,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165296152] [2024-06-21 20:52:45,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:45,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:52:45,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:52:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:52:45,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 20:52:45,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:45,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:45,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 20:52:45,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:46,749 INFO L124 PetriNetUnfolderBase]: 9511/13194 cut-off events. [2024-06-21 20:52:46,749 INFO L125 PetriNetUnfolderBase]: For 7072/7072 co-relation queries the response was YES. [2024-06-21 20:52:46,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33307 conditions, 13194 events. 9511/13194 cut-off events. For 7072/7072 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71614 event pairs, 4705 based on Foata normal form. 8/13199 useless extension candidates. Maximal degree in co-relation 33293. Up to 12817 conditions per place. [2024-06-21 20:52:46,839 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 70 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-21 20:52:46,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 484 flow [2024-06-21 20:52:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:52:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:52:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-21 20:52:46,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 20:52:46,841 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 180 transitions. [2024-06-21 20:52:46,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 484 flow [2024-06-21 20:52:46,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 456 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 20:52:46,844 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 20:52:46,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 20:52:46,845 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 20:52:46,845 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 20:52:46,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:46,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:46,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:46,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:52:46,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:52:46,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:46,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1193988501, now seen corresponding path program 1 times [2024-06-21 20:52:46,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:46,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020563462] [2024-06-21 20:52:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:46,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:47,516 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 20:52:47,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:47,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020563462] [2024-06-21 20:52:47,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020563462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:47,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:47,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:52:47,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881329305] [2024-06-21 20:52:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:47,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:52:47,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:52:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:52:47,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:52:47,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:47,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:47,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:52:47,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:48,751 INFO L124 PetriNetUnfolderBase]: 8107/11579 cut-off events. [2024-06-21 20:52:48,752 INFO L125 PetriNetUnfolderBase]: For 11520/11520 co-relation queries the response was YES. [2024-06-21 20:52:48,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31984 conditions, 11579 events. 8107/11579 cut-off events. For 11520/11520 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 65093 event pairs, 4373 based on Foata normal form. 3/11412 useless extension candidates. Maximal degree in co-relation 31967. Up to 11029 conditions per place. [2024-06-21 20:52:48,807 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-21 20:52:48,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 445 flow [2024-06-21 20:52:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:52:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:52:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 20:52:48,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2024-06-21 20:52:48,809 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 131 transitions. [2024-06-21 20:52:48,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 445 flow [2024-06-21 20:52:48,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 407 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:48,814 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 264 flow [2024-06-21 20:52:48,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-21 20:52:48,815 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-21 20:52:48,815 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 264 flow [2024-06-21 20:52:48,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:48,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:48,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:48,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:52:48,816 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 20:52:48,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:48,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2107554694, now seen corresponding path program 1 times [2024-06-21 20:52:48,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:48,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311957942] [2024-06-21 20:52:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:48,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:49,545 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 20:52:49,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:49,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311957942] [2024-06-21 20:52:49,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311957942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:49,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:49,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:52:49,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818099557] [2024-06-21 20:52:49,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:49,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:52:49,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:49,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:52:49,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:52:49,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:52:49,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:49,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:49,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:52:49,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:50,847 INFO L124 PetriNetUnfolderBase]: 9546/13252 cut-off events. [2024-06-21 20:52:50,848 INFO L125 PetriNetUnfolderBase]: For 21313/21313 co-relation queries the response was YES. [2024-06-21 20:52:50,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40125 conditions, 13252 events. 9546/13252 cut-off events. For 21313/21313 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71967 event pairs, 5132 based on Foata normal form. 6/13255 useless extension candidates. Maximal degree in co-relation 40106. Up to 12898 conditions per place. [2024-06-21 20:52:50,944 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-06-21 20:52:50,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 536 flow [2024-06-21 20:52:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:52:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:52:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:52:50,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-21 20:52:50,946 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 264 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:52:50,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 536 flow [2024-06-21 20:52:50,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 507 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:50,952 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 310 flow [2024-06-21 20:52:50,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-21 20:52:50,958 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-21 20:52:50,958 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 310 flow [2024-06-21 20:52:50,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:50,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:50,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:50,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:52:50,959 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 20:52:50,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2107404964, now seen corresponding path program 2 times [2024-06-21 20:52:50,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:50,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317103130] [2024-06-21 20:52:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:50,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:51,796 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 20:52:51,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:51,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317103130] [2024-06-21 20:52:51,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317103130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:51,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:51,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:52:51,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888439472] [2024-06-21 20:52:51,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:51,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:52:51,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:52:51,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:52:51,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:52:51,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:51,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:51,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:52:51,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:53,169 INFO L124 PetriNetUnfolderBase]: 9559/13287 cut-off events. [2024-06-21 20:52:53,170 INFO L125 PetriNetUnfolderBase]: For 30868/30877 co-relation queries the response was YES. [2024-06-21 20:52:53,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43604 conditions, 13287 events. 9559/13287 cut-off events. For 30868/30877 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72143 event pairs, 5092 based on Foata normal form. 12/13293 useless extension candidates. Maximal degree in co-relation 43584. Up to 12871 conditions per place. [2024-06-21 20:52:53,294 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 66 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-21 20:52:53,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 590 flow [2024-06-21 20:52:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:52:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:52:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:52:53,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-21 20:52:53,296 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 310 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:52:53,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 590 flow [2024-06-21 20:52:53,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 547 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:52:53,302 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 364 flow [2024-06-21 20:52:53,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-21 20:52:53,305 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-21 20:52:53,305 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 364 flow [2024-06-21 20:52:53,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:53,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:53,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:53,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:52:53,305 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 20:52:53,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:53,306 INFO L85 PathProgramCache]: Analyzing trace with hash -943703266, now seen corresponding path program 1 times [2024-06-21 20:52:53,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:53,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443124196] [2024-06-21 20:52:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:53,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:54,352 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 20:52:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443124196] [2024-06-21 20:52:54,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443124196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:54,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:54,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:52:54,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533518470] [2024-06-21 20:52:54,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:54,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:52:54,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:54,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:52:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:52:54,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:52:54,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 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 20:52:54,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:54,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:52:54,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:56,056 INFO L124 PetriNetUnfolderBase]: 9950/14172 cut-off events. [2024-06-21 20:52:56,056 INFO L125 PetriNetUnfolderBase]: For 42281/42281 co-relation queries the response was YES. [2024-06-21 20:52:56,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48932 conditions, 14172 events. 9950/14172 cut-off events. For 42281/42281 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 80267 event pairs, 5132 based on Foata normal form. 3/13962 useless extension candidates. Maximal degree in co-relation 48911. Up to 13468 conditions per place. [2024-06-21 20:52:56,157 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 82 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-21 20:52:56,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 701 flow [2024-06-21 20:52:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:52:56,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 20:52:56,159 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 364 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:52:56,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 701 flow [2024-06-21 20:52:56,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 631 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:52:56,171 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 413 flow [2024-06-21 20:52:56,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=299, 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=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=413, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-21 20:52:56,171 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-21 20:52:56,172 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 413 flow [2024-06-21 20:52:56,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 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 20:52:56,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:56,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:56,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:52:56,172 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 20:52:56,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash 632473210, now seen corresponding path program 1 times [2024-06-21 20:52:56,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:56,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195194866] [2024-06-21 20:52:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:56,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:57,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195194866] [2024-06-21 20:52:57,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195194866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:57,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:57,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:52:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279767944] [2024-06-21 20:52:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:57,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:52:57,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:52:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:52:57,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:52:57,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 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 20:52:57,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:57,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:52:57,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:58,796 INFO L124 PetriNetUnfolderBase]: 11374/15804 cut-off events. [2024-06-21 20:52:58,796 INFO L125 PetriNetUnfolderBase]: For 65467/65467 co-relation queries the response was YES. [2024-06-21 20:52:58,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59945 conditions, 15804 events. 11374/15804 cut-off events. For 65467/65467 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 87487 event pairs, 5636 based on Foata normal form. 3/15804 useless extension candidates. Maximal degree in co-relation 59922. Up to 15345 conditions per place. [2024-06-21 20:52:58,904 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 91 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-21 20:52:58,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 117 transitions, 775 flow [2024-06-21 20:52:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:52:58,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-21 20:52:58,906 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 413 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:52:58,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 117 transitions, 775 flow [2024-06-21 20:52:58,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 117 transitions, 718 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:52:58,919 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 459 flow [2024-06-21 20:52:58,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-21 20:52:58,919 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-21 20:52:58,920 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 459 flow [2024-06-21 20:52:58,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 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 20:52:58,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:58,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:58,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:52:58,920 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 20:52:58,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash 809970964, now seen corresponding path program 1 times [2024-06-21 20:52:58,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:58,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503633920] [2024-06-21 20:52:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:00,147 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 20:53:00,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503633920] [2024-06-21 20:53:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503633920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:00,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:00,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021829752] [2024-06-21 20:53:00,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:00,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:00,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:00,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:53:00,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 459 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:00,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:00,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:53:00,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:01,642 INFO L124 PetriNetUnfolderBase]: 9917/13871 cut-off events. [2024-06-21 20:53:01,642 INFO L125 PetriNetUnfolderBase]: For 71170/71170 co-relation queries the response was YES. [2024-06-21 20:53:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55361 conditions, 13871 events. 9917/13871 cut-off events. For 71170/71170 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 76517 event pairs, 4849 based on Foata normal form. 6/13728 useless extension candidates. Maximal degree in co-relation 55337. Up to 13393 conditions per place. [2024-06-21 20:53:01,731 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 94 selfloop transitions, 21 changer transitions 0/122 dead transitions. [2024-06-21 20:53:01,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 833 flow [2024-06-21 20:53:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:53:01,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 20:53:01,732 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 459 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:53:01,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 833 flow [2024-06-21 20:53:01,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 762 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:01,748 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 490 flow [2024-06-21 20:53:01,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=490, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-21 20:53:01,749 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-21 20:53:01,749 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 490 flow [2024-06-21 20:53:01,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:01,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:01,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:01,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:53:01,750 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:53:01,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:01,750 INFO L85 PathProgramCache]: Analyzing trace with hash 289188826, now seen corresponding path program 1 times [2024-06-21 20:53:01,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:01,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513914305] [2024-06-21 20:53:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:01,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:02,398 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 20:53:02,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513914305] [2024-06-21 20:53:02,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513914305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:02,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:02,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:53:02,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982171700] [2024-06-21 20:53:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:02,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:53:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:53:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:53:02,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:53:02,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 490 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 20:53:02,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:02,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:53:02,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:03,875 INFO L124 PetriNetUnfolderBase]: 9910/14238 cut-off events. [2024-06-21 20:53:03,875 INFO L125 PetriNetUnfolderBase]: For 83328/83328 co-relation queries the response was YES. [2024-06-21 20:53:03,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58236 conditions, 14238 events. 9910/14238 cut-off events. For 83328/83328 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 81438 event pairs, 4949 based on Foata normal form. 2/14057 useless extension candidates. Maximal degree in co-relation 58211. Up to 13450 conditions per place. [2024-06-21 20:53:03,977 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 84 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2024-06-21 20:53:03,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 754 flow [2024-06-21 20:53:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:53:03,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:53:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 20:53:03,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-06-21 20:53:03,979 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 490 flow. Second operand 5 states and 123 transitions. [2024-06-21 20:53:03,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 754 flow [2024-06-21 20:53:03,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 678 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:03,999 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 491 flow [2024-06-21 20:53:04,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-06-21 20:53:04,000 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-21 20:53:04,000 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 491 flow [2024-06-21 20:53:04,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 20:53:04,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:04,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:04,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:53:04,001 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 20:53:04,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash -904501045, now seen corresponding path program 1 times [2024-06-21 20:53:04,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:04,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826924760] [2024-06-21 20:53:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:04,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:04,959 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 20:53:04,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:04,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826924760] [2024-06-21 20:53:04,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826924760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:04,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:04,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:04,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908300360] [2024-06-21 20:53:04,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:04,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:04,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:05,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:05,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 491 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 20:53:05,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:05,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:05,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:06,674 INFO L124 PetriNetUnfolderBase]: 11624/16130 cut-off events. [2024-06-21 20:53:06,674 INFO L125 PetriNetUnfolderBase]: For 116587/116587 co-relation queries the response was YES. [2024-06-21 20:53:06,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70210 conditions, 16130 events. 11624/16130 cut-off events. For 116587/116587 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87465 event pairs, 5625 based on Foata normal form. 3/16130 useless extension candidates. Maximal degree in co-relation 70184. Up to 15655 conditions per place. [2024-06-21 20:53:06,808 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 112 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2024-06-21 20:53:06,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 947 flow [2024-06-21 20:53:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:53:06,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 20:53:06,811 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 491 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:53:06,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 947 flow [2024-06-21 20:53:06,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 900 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:53:06,839 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 607 flow [2024-06-21 20:53:06,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=607, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-21 20:53:06,840 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-21 20:53:06,840 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 607 flow [2024-06-21 20:53:06,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 20:53:06,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:06,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:06,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:53:06,841 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 20:53:06,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash -660979553, now seen corresponding path program 2 times [2024-06-21 20:53:06,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:06,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847206667] [2024-06-21 20:53:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:07,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847206667] [2024-06-21 20:53:07,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847206667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:07,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:07,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:07,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144040026] [2024-06-21 20:53:07,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:07,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:07,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:07,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:08,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:08,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 607 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 20:53:08,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:08,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:08,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:09,729 INFO L124 PetriNetUnfolderBase]: 11712/16253 cut-off events. [2024-06-21 20:53:09,729 INFO L125 PetriNetUnfolderBase]: For 139902/139911 co-relation queries the response was YES. [2024-06-21 20:53:09,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75321 conditions, 16253 events. 11712/16253 cut-off events. For 139902/139911 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88151 event pairs, 5635 based on Foata normal form. 12/16259 useless extension candidates. Maximal degree in co-relation 75292. Up to 15594 conditions per place. [2024-06-21 20:53:09,830 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 104 selfloop transitions, 46 changer transitions 0/156 dead transitions. [2024-06-21 20:53:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 156 transitions, 1141 flow [2024-06-21 20:53:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:53:09,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 20:53:09,857 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 607 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:53:09,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 156 transitions, 1141 flow [2024-06-21 20:53:09,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 156 transitions, 1066 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 20:53:09,886 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 787 flow [2024-06-21 20:53:09,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=787, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-21 20:53:09,887 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-21 20:53:09,887 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 787 flow [2024-06-21 20:53:09,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 20:53:09,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:09,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:09,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:53:09,888 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:53:09,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash -660712643, now seen corresponding path program 3 times [2024-06-21 20:53:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:09,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595148433] [2024-06-21 20:53:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:09,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:10,980 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 20:53:10,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:10,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595148433] [2024-06-21 20:53:10,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595148433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:10,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:10,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:10,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818818073] [2024-06-21 20:53:10,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:10,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:10,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:11,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:11,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 787 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 20:53:11,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:11,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:11,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:12,764 INFO L124 PetriNetUnfolderBase]: 11734/16283 cut-off events. [2024-06-21 20:53:12,765 INFO L125 PetriNetUnfolderBase]: For 166860/166869 co-relation queries the response was YES. [2024-06-21 20:53:12,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80218 conditions, 16283 events. 11734/16283 cut-off events. For 166860/166869 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88404 event pairs, 5635 based on Foata normal form. 9/16286 useless extension candidates. Maximal degree in co-relation 80187. Up to 15667 conditions per place. [2024-06-21 20:53:12,877 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 118 selfloop transitions, 54 changer transitions 0/178 dead transitions. [2024-06-21 20:53:12,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 178 transitions, 1566 flow [2024-06-21 20:53:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:53:12,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 20:53:12,879 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 787 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:53:12,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 178 transitions, 1566 flow [2024-06-21 20:53:12,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 178 transitions, 1402 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-21 20:53:12,921 INFO L231 Difference]: Finished difference. Result has 97 places, 137 transitions, 1085 flow [2024-06-21 20:53:12,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1085, PETRI_PLACES=97, PETRI_TRANSITIONS=137} [2024-06-21 20:53:12,922 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-21 20:53:12,922 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 137 transitions, 1085 flow [2024-06-21 20:53:12,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 20:53:12,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:12,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:12,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:53:12,923 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 20:53:12,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash -668331203, now seen corresponding path program 4 times [2024-06-21 20:53:12,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:12,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176806288] [2024-06-21 20:53:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:12,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:14,006 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 20:53:14,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:14,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176806288] [2024-06-21 20:53:14,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176806288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:14,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:14,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:14,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463488815] [2024-06-21 20:53:14,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:14,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:14,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:14,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:14,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 137 transitions, 1085 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 20:53:14,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:14,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:14,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:15,781 INFO L124 PetriNetUnfolderBase]: 11747/16301 cut-off events. [2024-06-21 20:53:15,781 INFO L125 PetriNetUnfolderBase]: For 190008/190017 co-relation queries the response was YES. [2024-06-21 20:53:15,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82924 conditions, 16301 events. 11747/16301 cut-off events. For 190008/190017 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88519 event pairs, 5635 based on Foata normal form. 12/16307 useless extension candidates. Maximal degree in co-relation 82889. Up to 15642 conditions per place. [2024-06-21 20:53:15,920 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 118 selfloop transitions, 57 changer transitions 0/181 dead transitions. [2024-06-21 20:53:15,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 181 transitions, 1629 flow [2024-06-21 20:53:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:53:15,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 20:53:15,922 INFO L175 Difference]: Start difference. First operand has 97 places, 137 transitions, 1085 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:53:15,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 181 transitions, 1629 flow [2024-06-21 20:53:16,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 181 transitions, 1515 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-21 20:53:16,026 INFO L231 Difference]: Finished difference. Result has 104 places, 142 transitions, 1216 flow [2024-06-21 20:53:16,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1216, PETRI_PLACES=104, PETRI_TRANSITIONS=142} [2024-06-21 20:53:16,026 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-21 20:53:16,026 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 142 transitions, 1216 flow [2024-06-21 20:53:16,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 20:53:16,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:16,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:16,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:53:16,027 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:53:16,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 339170896, now seen corresponding path program 1 times [2024-06-21 20:53:16,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:16,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436788896] [2024-06-21 20:53:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:16,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:16,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436788896] [2024-06-21 20:53:16,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436788896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:16,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:16,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:53:16,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778302505] [2024-06-21 20:53:16,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:16,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:53:16,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:16,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:53:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:53:16,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:16,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 142 transitions, 1216 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:16,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:16,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:16,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:18,486 INFO L124 PetriNetUnfolderBase]: 11753/16317 cut-off events. [2024-06-21 20:53:18,487 INFO L125 PetriNetUnfolderBase]: For 213569/213569 co-relation queries the response was YES. [2024-06-21 20:53:18,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86812 conditions, 16317 events. 11753/16317 cut-off events. For 213569/213569 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88520 event pairs, 5583 based on Foata normal form. 6/16320 useless extension candidates. Maximal degree in co-relation 86774. Up to 15840 conditions per place. [2024-06-21 20:53:18,619 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 150 selfloop transitions, 22 changer transitions 0/178 dead transitions. [2024-06-21 20:53:18,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 178 transitions, 1808 flow [2024-06-21 20:53:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:53:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:53:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:53:18,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 20:53:18,622 INFO L175 Difference]: Start difference. First operand has 104 places, 142 transitions, 1216 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:53:18,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 178 transitions, 1808 flow [2024-06-21 20:53:18,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 178 transitions, 1610 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:18,703 INFO L231 Difference]: Finished difference. Result has 105 places, 156 transitions, 1244 flow [2024-06-21 20:53:18,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1244, PETRI_PLACES=105, PETRI_TRANSITIONS=156} [2024-06-21 20:53:18,704 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-21 20:53:18,704 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 156 transitions, 1244 flow [2024-06-21 20:53:18,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:18,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:18,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:18,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:53:18,705 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 20:53:18,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:18,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1967867309, now seen corresponding path program 1 times [2024-06-21 20:53:18,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:18,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511645700] [2024-06-21 20:53:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:18,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:19,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:19,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511645700] [2024-06-21 20:53:19,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511645700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:19,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:19,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796293808] [2024-06-21 20:53:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:19,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:53:19,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 156 transitions, 1244 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:19,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:19,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:53:19,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:21,973 INFO L124 PetriNetUnfolderBase]: 12095/16850 cut-off events. [2024-06-21 20:53:21,973 INFO L125 PetriNetUnfolderBase]: For 274134/274272 co-relation queries the response was YES. [2024-06-21 20:53:22,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96359 conditions, 16850 events. 12095/16850 cut-off events. For 274134/274272 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 94527 event pairs, 4492 based on Foata normal form. 6/16769 useless extension candidates. Maximal degree in co-relation 96320. Up to 16160 conditions per place. [2024-06-21 20:53:22,102 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 170 selfloop transitions, 20 changer transitions 0/205 dead transitions. [2024-06-21 20:53:22,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 205 transitions, 1814 flow [2024-06-21 20:53:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:53:22,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-21 20:53:22,103 INFO L175 Difference]: Start difference. First operand has 105 places, 156 transitions, 1244 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:53:22,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 205 transitions, 1814 flow [2024-06-21 20:53:22,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 205 transitions, 1766 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-21 20:53:22,187 INFO L231 Difference]: Finished difference. Result has 112 places, 159 transitions, 1324 flow [2024-06-21 20:53:22,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=112, PETRI_TRANSITIONS=159} [2024-06-21 20:53:22,188 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-21 20:53:22,188 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 159 transitions, 1324 flow [2024-06-21 20:53:22,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:22,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:22,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:22,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:53:22,189 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 20:53:22,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:22,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2020586467, now seen corresponding path program 2 times [2024-06-21 20:53:22,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:22,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961025916] [2024-06-21 20:53:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:22,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:23,244 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 20:53:23,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:23,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961025916] [2024-06-21 20:53:23,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961025916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:23,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:23,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:23,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45291928] [2024-06-21 20:53:23,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:23,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:23,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:23,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:23,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:53:23,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 159 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:23,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:23,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:53:23,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:25,267 INFO L124 PetriNetUnfolderBase]: 11881/16646 cut-off events. [2024-06-21 20:53:25,267 INFO L125 PetriNetUnfolderBase]: For 301920/302058 co-relation queries the response was YES. [2024-06-21 20:53:25,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98454 conditions, 16646 events. 11881/16646 cut-off events. For 301920/302058 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 93644 event pairs, 5085 based on Foata normal form. 6/16593 useless extension candidates. Maximal degree in co-relation 98412. Up to 15899 conditions per place. [2024-06-21 20:53:25,412 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 171 selfloop transitions, 21 changer transitions 0/207 dead transitions. [2024-06-21 20:53:25,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 207 transitions, 1902 flow [2024-06-21 20:53:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:53:25,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-21 20:53:25,414 INFO L175 Difference]: Start difference. First operand has 112 places, 159 transitions, 1324 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:53:25,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 207 transitions, 1902 flow [2024-06-21 20:53:25,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 207 transitions, 1800 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:25,517 INFO L231 Difference]: Finished difference. Result has 114 places, 162 transitions, 1358 flow [2024-06-21 20:53:25,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=114, PETRI_TRANSITIONS=162} [2024-06-21 20:53:25,518 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-21 20:53:25,518 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 162 transitions, 1358 flow [2024-06-21 20:53:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:25,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:25,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:25,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:53:25,519 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 20:53:25,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:25,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1850609853, now seen corresponding path program 1 times [2024-06-21 20:53:25,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:25,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330655096] [2024-06-21 20:53:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:25,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:26,766 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 20:53:26,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:26,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330655096] [2024-06-21 20:53:26,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330655096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:26,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:26,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:26,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937068440] [2024-06-21 20:53:26,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:26,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:26,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:26,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:26,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 162 transitions, 1358 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:26,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:26,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:26,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:29,413 INFO L124 PetriNetUnfolderBase]: 12421/17219 cut-off events. [2024-06-21 20:53:29,413 INFO L125 PetriNetUnfolderBase]: For 341942/342080 co-relation queries the response was YES. [2024-06-21 20:53:29,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102490 conditions, 17219 events. 12421/17219 cut-off events. For 341942/342080 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 94093 event pairs, 5152 based on Foata normal form. 3/17150 useless extension candidates. Maximal degree in co-relation 102447. Up to 16620 conditions per place. [2024-06-21 20:53:29,547 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 186 selfloop transitions, 26 changer transitions 0/221 dead transitions. [2024-06-21 20:53:29,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 221 transitions, 2033 flow [2024-06-21 20:53:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 20:53:29,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 20:53:29,549 INFO L175 Difference]: Start difference. First operand has 114 places, 162 transitions, 1358 flow. Second operand 9 states and 221 transitions. [2024-06-21 20:53:29,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 221 transitions, 2033 flow [2024-06-21 20:53:29,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 221 transitions, 1918 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:29,664 INFO L231 Difference]: Finished difference. Result has 118 places, 170 transitions, 1440 flow [2024-06-21 20:53:29,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1440, PETRI_PLACES=118, PETRI_TRANSITIONS=170} [2024-06-21 20:53:29,665 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-21 20:53:29,665 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 170 transitions, 1440 flow [2024-06-21 20:53:29,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:29,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:29,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:29,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:53:29,666 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 20:53:29,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1127002567, now seen corresponding path program 3 times [2024-06-21 20:53:29,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:29,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021862087] [2024-06-21 20:53:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:29,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:30,745 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 20:53:30,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:30,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021862087] [2024-06-21 20:53:30,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021862087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:30,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:30,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:30,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613507491] [2024-06-21 20:53:30,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:30,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:30,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:30,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:30,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:30,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:53:30,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 170 transitions, 1440 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:30,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:30,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:53:30,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:33,076 INFO L124 PetriNetUnfolderBase]: 11913/16731 cut-off events. [2024-06-21 20:53:33,076 INFO L125 PetriNetUnfolderBase]: For 383116/383254 co-relation queries the response was YES. [2024-06-21 20:53:33,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105919 conditions, 16731 events. 11913/16731 cut-off events. For 383116/383254 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 94182 event pairs, 4942 based on Foata normal form. 12/16677 useless extension candidates. Maximal degree in co-relation 105874. Up to 15942 conditions per place. [2024-06-21 20:53:33,203 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 172 selfloop transitions, 27 changer transitions 0/215 dead transitions. [2024-06-21 20:53:33,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 215 transitions, 2034 flow [2024-06-21 20:53:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:33,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:53:33,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 20:53:33,205 INFO L175 Difference]: Start difference. First operand has 118 places, 170 transitions, 1440 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:53:33,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 215 transitions, 2034 flow [2024-06-21 20:53:33,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 215 transitions, 1899 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:33,322 INFO L231 Difference]: Finished difference. Result has 120 places, 173 transitions, 1464 flow [2024-06-21 20:53:33,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1464, PETRI_PLACES=120, PETRI_TRANSITIONS=173} [2024-06-21 20:53:33,323 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-21 20:53:33,323 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 173 transitions, 1464 flow [2024-06-21 20:53:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:33,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:33,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:33,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:53:33,324 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 20:53:33,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:33,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1963275589, now seen corresponding path program 2 times [2024-06-21 20:53:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:33,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196658748] [2024-06-21 20:53:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:34,855 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 20:53:34,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:34,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196658748] [2024-06-21 20:53:34,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196658748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:34,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:34,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932455027] [2024-06-21 20:53:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:34,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:34,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:34,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 173 transitions, 1464 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:34,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:34,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:34,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:37,322 INFO L124 PetriNetUnfolderBase]: 12537/17399 cut-off events. [2024-06-21 20:53:37,323 INFO L125 PetriNetUnfolderBase]: For 426226/426364 co-relation queries the response was YES. [2024-06-21 20:53:37,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110650 conditions, 17399 events. 12537/17399 cut-off events. For 426226/426364 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 95239 event pairs, 5160 based on Foata normal form. 3/17330 useless extension candidates. Maximal degree in co-relation 110604. Up to 16760 conditions per place. [2024-06-21 20:53:37,497 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 187 selfloop transitions, 33 changer transitions 0/229 dead transitions. [2024-06-21 20:53:37,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 229 transitions, 2171 flow [2024-06-21 20:53:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 20:53:37,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-21 20:53:37,499 INFO L175 Difference]: Start difference. First operand has 120 places, 173 transitions, 1464 flow. Second operand 9 states and 220 transitions. [2024-06-21 20:53:37,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 229 transitions, 2171 flow [2024-06-21 20:53:37,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 229 transitions, 2008 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:37,785 INFO L231 Difference]: Finished difference. Result has 122 places, 181 transitions, 1529 flow [2024-06-21 20:53:37,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1529, PETRI_PLACES=122, PETRI_TRANSITIONS=181} [2024-06-21 20:53:37,786 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-21 20:53:37,786 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 181 transitions, 1529 flow [2024-06-21 20:53:37,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:37,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:37,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:37,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:53:37,786 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:53:37,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:37,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1963096099, now seen corresponding path program 3 times [2024-06-21 20:53:37,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:37,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845079760] [2024-06-21 20:53:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:39,113 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 20:53:39,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:39,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845079760] [2024-06-21 20:53:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845079760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:39,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:39,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720976473] [2024-06-21 20:53:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:39,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:39,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 181 transitions, 1529 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:39,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:39,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:39,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:41,805 INFO L124 PetriNetUnfolderBase]: 12590/17479 cut-off events. [2024-06-21 20:53:41,805 INFO L125 PetriNetUnfolderBase]: For 470634/470772 co-relation queries the response was YES. [2024-06-21 20:53:41,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114652 conditions, 17479 events. 12590/17479 cut-off events. For 470634/470772 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 95675 event pairs, 5160 based on Foata normal form. 3/17410 useless extension candidates. Maximal degree in co-relation 114606. Up to 16784 conditions per place. [2024-06-21 20:53:41,957 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 193 selfloop transitions, 45 changer transitions 0/247 dead transitions. [2024-06-21 20:53:41,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 247 transitions, 2501 flow [2024-06-21 20:53:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:53:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:53:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-21 20:53:41,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 20:53:41,959 INFO L175 Difference]: Start difference. First operand has 122 places, 181 transitions, 1529 flow. Second operand 10 states and 247 transitions. [2024-06-21 20:53:41,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 247 transitions, 2501 flow [2024-06-21 20:53:42,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 247 transitions, 2320 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:42,104 INFO L231 Difference]: Finished difference. Result has 125 places, 189 transitions, 1689 flow [2024-06-21 20:53:42,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1689, PETRI_PLACES=125, PETRI_TRANSITIONS=189} [2024-06-21 20:53:42,104 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-21 20:53:42,104 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 189 transitions, 1689 flow [2024-06-21 20:53:42,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:42,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:42,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:42,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:53:42,105 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:53:42,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1963102609, now seen corresponding path program 4 times [2024-06-21 20:53:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:42,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951902745] [2024-06-21 20:53:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:43,464 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 20:53:43,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:43,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951902745] [2024-06-21 20:53:43,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951902745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:43,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:43,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:43,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935996433] [2024-06-21 20:53:43,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:43,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:43,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:43,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:43,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 189 transitions, 1689 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:43,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:43,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:43,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:46,405 INFO L124 PetriNetUnfolderBase]: 12581/17467 cut-off events. [2024-06-21 20:53:46,405 INFO L125 PetriNetUnfolderBase]: For 516029/516167 co-relation queries the response was YES. [2024-06-21 20:53:46,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117244 conditions, 17467 events. 12581/17467 cut-off events. For 516029/516167 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 95437 event pairs, 5160 based on Foata normal form. 3/17398 useless extension candidates. Maximal degree in co-relation 117198. Up to 16820 conditions per place. [2024-06-21 20:53:46,542 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 195 selfloop transitions, 33 changer transitions 0/237 dead transitions. [2024-06-21 20:53:46,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 237 transitions, 2269 flow [2024-06-21 20:53:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 20:53:46,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-21 20:53:46,544 INFO L175 Difference]: Start difference. First operand has 125 places, 189 transitions, 1689 flow. Second operand 9 states and 220 transitions. [2024-06-21 20:53:46,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 237 transitions, 2269 flow [2024-06-21 20:53:46,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 237 transitions, 2024 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:46,753 INFO L231 Difference]: Finished difference. Result has 129 places, 189 transitions, 1521 flow [2024-06-21 20:53:46,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=129, PETRI_TRANSITIONS=189} [2024-06-21 20:53:46,753 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-21 20:53:46,753 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 189 transitions, 1521 flow [2024-06-21 20:53:46,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:46,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:46,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:53:46,754 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:53:46,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1963095851, now seen corresponding path program 1 times [2024-06-21 20:53:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805788041] [2024-06-21 20:53:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:46,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:47,887 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 20:53:47,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:47,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805788041] [2024-06-21 20:53:47,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805788041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:47,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:47,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:47,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198983973] [2024-06-21 20:53:47,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:47,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:47,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:47,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:47,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:48,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:48,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 189 transitions, 1521 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:48,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:48,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:48,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:50,649 INFO L124 PetriNetUnfolderBase]: 12698/17600 cut-off events. [2024-06-21 20:53:50,649 INFO L125 PetriNetUnfolderBase]: For 543735/543873 co-relation queries the response was YES. [2024-06-21 20:53:50,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119124 conditions, 17600 events. 12698/17600 cut-off events. For 543735/543873 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 95920 event pairs, 5139 based on Foata normal form. 6/17519 useless extension candidates. Maximal degree in co-relation 119076. Up to 16996 conditions per place. [2024-06-21 20:53:50,821 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 207 selfloop transitions, 25 changer transitions 0/241 dead transitions. [2024-06-21 20:53:50,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 241 transitions, 2203 flow [2024-06-21 20:53:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 20:53:50,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2024-06-21 20:53:50,823 INFO L175 Difference]: Start difference. First operand has 129 places, 189 transitions, 1521 flow. Second operand 9 states and 218 transitions. [2024-06-21 20:53:50,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 241 transitions, 2203 flow [2024-06-21 20:53:51,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 241 transitions, 2107 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 20:53:51,003 INFO L231 Difference]: Finished difference. Result has 130 places, 192 transitions, 1583 flow [2024-06-21 20:53:51,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1583, PETRI_PLACES=130, PETRI_TRANSITIONS=192} [2024-06-21 20:53:51,003 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-21 20:53:51,003 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 192 transitions, 1583 flow [2024-06-21 20:53:51,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:53:51,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:51,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:51,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:53:51,004 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 20:53:51,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1157207045, now seen corresponding path program 1 times [2024-06-21 20:53:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:51,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642150029] [2024-06-21 20:53:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:51,778 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 20:53:51,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:51,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642150029] [2024-06-21 20:53:51,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642150029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:51,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:51,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:53:51,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558093553] [2024-06-21 20:53:51,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:51,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:53:51,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:53:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:53:51,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:53:51,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 192 transitions, 1583 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:51,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:51,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:53:51,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:54,259 INFO L124 PetriNetUnfolderBase]: 12730/17649 cut-off events. [2024-06-21 20:53:54,260 INFO L125 PetriNetUnfolderBase]: For 586786/586946 co-relation queries the response was YES. [2024-06-21 20:53:54,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122455 conditions, 17649 events. 12730/17649 cut-off events. For 586786/586946 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 96414 event pairs, 5116 based on Foata normal form. 8/17566 useless extension candidates. Maximal degree in co-relation 122406. Up to 17036 conditions per place. [2024-06-21 20:53:54,410 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 195 selfloop transitions, 24 changer transitions 0/228 dead transitions. [2024-06-21 20:53:54,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 228 transitions, 2363 flow [2024-06-21 20:53:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:53:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:53:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:53:54,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-21 20:53:54,411 INFO L175 Difference]: Start difference. First operand has 130 places, 192 transitions, 1583 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:53:54,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 228 transitions, 2363 flow [2024-06-21 20:53:54,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 228 transitions, 2231 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:54,601 INFO L231 Difference]: Finished difference. Result has 129 places, 200 transitions, 1685 flow [2024-06-21 20:53:54,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1685, PETRI_PLACES=129, PETRI_TRANSITIONS=200} [2024-06-21 20:53:54,601 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-21 20:53:54,602 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 200 transitions, 1685 flow [2024-06-21 20:53:54,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:54,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:54,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:54,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:53:54,602 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 20:53:54,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2131535197, now seen corresponding path program 4 times [2024-06-21 20:53:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:54,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510335898] [2024-06-21 20:53:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:55,740 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 20:53:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510335898] [2024-06-21 20:53:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510335898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:55,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965981387] [2024-06-21 20:53:55,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:55,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:55,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:53:55,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 200 transitions, 1685 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:55,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:55,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:53:55,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:58,541 INFO L124 PetriNetUnfolderBase]: 12126/17023 cut-off events. [2024-06-21 20:53:58,541 INFO L125 PetriNetUnfolderBase]: For 625436/625599 co-relation queries the response was YES. [2024-06-21 20:53:58,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124123 conditions, 17023 events. 12126/17023 cut-off events. For 625436/625599 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 95710 event pairs, 4898 based on Foata normal form. 18/16954 useless extension candidates. Maximal degree in co-relation 124073. Up to 16131 conditions per place. [2024-06-21 20:53:58,696 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 170 selfloop transitions, 56 changer transitions 0/242 dead transitions. [2024-06-21 20:53:58,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 242 transitions, 2345 flow [2024-06-21 20:53:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:53:58,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 20:53:58,698 INFO L175 Difference]: Start difference. First operand has 129 places, 200 transitions, 1685 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:53:58,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 242 transitions, 2345 flow [2024-06-21 20:53:58,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 242 transitions, 2263 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 20:53:58,951 INFO L231 Difference]: Finished difference. Result has 135 places, 203 transitions, 1841 flow [2024-06-21 20:53:58,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1841, PETRI_PLACES=135, PETRI_TRANSITIONS=203} [2024-06-21 20:53:58,951 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-21 20:53:58,951 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 203 transitions, 1841 flow [2024-06-21 20:53:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:58,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:58,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:53:58,952 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 20:53:58,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2131719895, now seen corresponding path program 2 times [2024-06-21 20:53:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:58,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675699203] [2024-06-21 20:53:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:58,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:00,388 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 20:54:00,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:00,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675699203] [2024-06-21 20:54:00,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675699203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:00,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:00,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:00,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783425543] [2024-06-21 20:54:00,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:00,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:00,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:00,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:00,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:00,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:54:00,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 203 transitions, 1841 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:54:00,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:00,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:54:00,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:03,121 INFO L124 PetriNetUnfolderBase]: 12900/17905 cut-off events. [2024-06-21 20:54:03,122 INFO L125 PetriNetUnfolderBase]: For 705406/705569 co-relation queries the response was YES. [2024-06-21 20:54:03,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131464 conditions, 17905 events. 12900/17905 cut-off events. For 705406/705569 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 97855 event pairs, 5140 based on Foata normal form. 36/17848 useless extension candidates. Maximal degree in co-relation 131412. Up to 16906 conditions per place. [2024-06-21 20:54:03,444 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 184 selfloop transitions, 66 changer transitions 0/259 dead transitions. [2024-06-21 20:54:03,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 259 transitions, 2731 flow [2024-06-21 20:54:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 20:54:03,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48504273504273504 [2024-06-21 20:54:03,446 INFO L175 Difference]: Start difference. First operand has 135 places, 203 transitions, 1841 flow. Second operand 9 states and 227 transitions. [2024-06-21 20:54:03,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 259 transitions, 2731 flow [2024-06-21 20:54:03,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 259 transitions, 2390 flow, removed 111 selfloop flow, removed 6 redundant places. [2024-06-21 20:54:03,703 INFO L231 Difference]: Finished difference. Result has 138 places, 208 transitions, 1877 flow [2024-06-21 20:54:03,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1877, PETRI_PLACES=138, PETRI_TRANSITIONS=208} [2024-06-21 20:54:03,704 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-21 20:54:03,704 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 208 transitions, 1877 flow [2024-06-21 20:54:03,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:54:03,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:03,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:03,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:54:03,705 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 20:54:03,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash 756570077, now seen corresponding path program 5 times [2024-06-21 20:54:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:03,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591382552] [2024-06-21 20:54:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat