./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix015.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/mix015.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/mix015.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix015.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 20:42:54,507 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:42:54,580 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:42:54,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:42:54,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:42:54,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:42:54,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:42:54,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:42:54,610 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:42:54,613 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:42:54,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:42:54,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:42:54,614 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:42:54,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:42:54,616 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:42:54,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:42:54,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:42:54,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:42:54,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:42:54,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:42:54,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:42:54,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:42:54,617 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:42:54,618 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:42:54,618 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:42:54,618 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:42:54,618 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:42:54,618 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:42:54,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:42:54,619 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:42:54,619 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:42:54,619 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:42:54,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:42:54,620 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:42:54,620 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:42:54,620 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:42:54,620 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:42:54,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:42:54,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:42:54,621 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:42:54,621 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:42:54,621 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:42:54,621 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:42:54,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:42:54,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:42:54,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:42:54,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:42:54,843 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:42:54,844 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:42:54,845 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.opt.i [2024-06-21 20:42:55,809 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:42:56,043 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:42:56,044 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.opt.i [2024-06-21 20:42:56,059 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc12229e4/60cf09d2a6ea4fce8d82b5255148d677/FLAGaeeacb33c [2024-06-21 20:42:56,069 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc12229e4/60cf09d2a6ea4fce8d82b5255148d677 [2024-06-21 20:42:56,070 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:42:56,071 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:42:56,071 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix015.opt.yml/witness.yml [2024-06-21 20:42:56,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:42:56,193 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:42:56,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:42:56,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:42:56,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:42:56,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:42:56" (1/2) ... [2024-06-21 20:42:56,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47efa9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:42:56, skipping insertion in model container [2024-06-21 20:42:56,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:42:56" (1/2) ... [2024-06-21 20:42:56,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38b50e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:42:56, skipping insertion in model container [2024-06-21 20:42:56,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:42:56" (2/2) ... [2024-06-21 20:42:56,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47efa9e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56, skipping insertion in model container [2024-06-21 20:42:56,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:42:56" (2/2) ... [2024-06-21 20:42:56,201 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:42:56,300 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:42:56,307 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:42:56,307 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:42:56,307 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:42:56,308 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:42:56,308 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 20:42:56,344 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:42:56,599 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:42:56,606 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:42:56,771 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:42:56,804 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:42:56,805 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56 WrapperNode [2024-06-21 20:42:56,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:42:56,806 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:42:56,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:42:56,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:42:56,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,828 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,865 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-21 20:42:56,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:42:56,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:42:56,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:42:56,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:42:56,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,895 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 20:42:56,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,896 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,912 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,914 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,928 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,929 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:42:56,933 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:42:56,933 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:42:56,933 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:42:56,944 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (1/1) ... [2024-06-21 20:42:56,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:42:56,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:42:56,985 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 20:42:56,990 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 20:42:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:42:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:42:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:42:57,019 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:42:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:42:57,019 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:42:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:42:57,020 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:42:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:42:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:42:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:42:57,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:42:57,021 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 20:42:57,159 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:42:57,161 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:42:57,514 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:42:57,515 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:42:57,619 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:42:57,619 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:42:57,620 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:42:57 BoogieIcfgContainer [2024-06-21 20:42:57,620 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:42:57,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:42:57,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:42:57,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:42:57,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:42:56" (1/4) ... [2024-06-21 20:42:57,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576e09cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:42:57, skipping insertion in model container [2024-06-21 20:42:57,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:42:56" (2/4) ... [2024-06-21 20:42:57,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576e09cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:42:57, skipping insertion in model container [2024-06-21 20:42:57,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:42:56" (3/4) ... [2024-06-21 20:42:57,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576e09cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:42:57, skipping insertion in model container [2024-06-21 20:42:57,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:42:57" (4/4) ... [2024-06-21 20:42:57,628 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.opt.i [2024-06-21 20:42:57,641 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:42:57,642 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:42:57,642 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:42:57,679 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:42:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:42:57,747 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 20:42:57,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:42:57,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:42:57,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:42:57,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 20:42:57,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:42:57,765 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;@1e7f83ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:42:57,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:42:57,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:42:57,769 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:42:57,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:42:57,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:57,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:42:57,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:57,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash 402627273, now seen corresponding path program 1 times [2024-06-21 20:42:57,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725144975] [2024-06-21 20:42:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:57,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:58,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:58,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725144975] [2024-06-21 20:42:58,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725144975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:58,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:58,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:42:58,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561355787] [2024-06-21 20:42:58,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:58,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:42:58,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:58,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:42:58,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:42:58,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-21 20:42:58,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:58,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:58,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-21 20:42:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:59,173 INFO L124 PetriNetUnfolderBase]: 1116/1782 cut-off events. [2024-06-21 20:42:59,173 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 20:42:59,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3533 conditions, 1782 events. 1116/1782 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9227 event pairs, 765 based on Foata normal form. 1/1708 useless extension candidates. Maximal degree in co-relation 3521. Up to 1676 conditions per place. [2024-06-21 20:42:59,188 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 31 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 20:42:59,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 173 flow [2024-06-21 20:42:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:42:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:42:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-21 20:42:59,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434108527131783 [2024-06-21 20:42:59,199 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 83 transitions. [2024-06-21 20:42:59,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 173 flow [2024-06-21 20:42:59,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:42:59,204 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 20:42:59,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 20:42:59,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 20:42:59,208 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 20:42:59,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:59,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:59,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:42:59,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:59,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 377774120, now seen corresponding path program 1 times [2024-06-21 20:42:59,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:59,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265350515] [2024-06-21 20:42:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:59,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:59,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265350515] [2024-06-21 20:42:59,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265350515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:59,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:59,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:42:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561224035] [2024-06-21 20:42:59,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:59,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:42:59,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:42:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:43:00,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 20:43:00,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:00,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:00,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 20:43:00,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:00,274 INFO L124 PetriNetUnfolderBase]: 1280/1968 cut-off events. [2024-06-21 20:43:00,274 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2024-06-21 20:43:00,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4489 conditions, 1968 events. 1280/1968 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9889 event pairs, 750 based on Foata normal form. 3/1949 useless extension candidates. Maximal degree in co-relation 4477. Up to 1897 conditions per place. [2024-06-21 20:43:00,284 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 20:43:00,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-21 20:43:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:43:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:43:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 20:43:00,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-21 20:43:00,286 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-21 20:43:00,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-21 20:43:00,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:43:00,287 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 20:43:00,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 20:43:00,288 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 20:43:00,288 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 20:43:00,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:00,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:00,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:00,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:43:00,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:00,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1173903438, now seen corresponding path program 1 times [2024-06-21 20:43:00,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:00,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561594757] [2024-06-21 20:43:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:01,100 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 20:43:01,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:01,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561594757] [2024-06-21 20:43:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561594757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:01,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:43:01,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814569625] [2024-06-21 20:43:01,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:01,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:43:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:01,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:43:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:43:01,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:43:01,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 20:43:01,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:01,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:43:01,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:01,460 INFO L124 PetriNetUnfolderBase]: 1558/2371 cut-off events. [2024-06-21 20:43:01,460 INFO L125 PetriNetUnfolderBase]: For 1303/1303 co-relation queries the response was YES. [2024-06-21 20:43:01,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5987 conditions, 2371 events. 1558/2371 cut-off events. For 1303/1303 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11778 event pairs, 839 based on Foata normal form. 3/2362 useless extension candidates. Maximal degree in co-relation 5973. Up to 2286 conditions per place. [2024-06-21 20:43:01,472 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 47 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-21 20:43:01,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 322 flow [2024-06-21 20:43:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:43:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:43:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 20:43:01,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-21 20:43:01,477 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 125 transitions. [2024-06-21 20:43:01,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 322 flow [2024-06-21 20:43:01,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 308 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:43:01,481 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-21 20:43:01,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 20:43:01,482 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-21 20:43:01,483 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-21 20:43:01,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 20:43:01,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:01,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:01,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:43:01,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:01,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash -950747879, now seen corresponding path program 1 times [2024-06-21 20:43:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:01,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763231677] [2024-06-21 20:43:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:02,401 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 20:43:02,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:02,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763231677] [2024-06-21 20:43:02,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763231677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:02,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:02,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:43:02,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204992167] [2024-06-21 20:43:02,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:02,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:43:02,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:02,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:43:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:43:02,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:43:02,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 20:43:02,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:02,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:43:02,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:02,807 INFO L124 PetriNetUnfolderBase]: 1552/2375 cut-off events. [2024-06-21 20:43:02,808 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2024-06-21 20:43:02,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6561 conditions, 2375 events. 1552/2375 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11924 event pairs, 697 based on Foata normal form. 3/2373 useless extension candidates. Maximal degree in co-relation 6546. Up to 2262 conditions per place. [2024-06-21 20:43:02,822 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 54 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-21 20:43:02,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 400 flow [2024-06-21 20:43:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:43:02,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-21 20:43:02,824 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:43:02,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 400 flow [2024-06-21 20:43:02,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 376 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:02,829 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-21 20:43:02,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-21 20:43:02,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 20:43:02,830 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-21 20:43:02,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 20:43:02,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:02,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:02,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:43:02,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:02,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:02,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1246508503, now seen corresponding path program 1 times [2024-06-21 20:43:02,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:02,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440989048] [2024-06-21 20:43:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:02,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:03,460 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 20:43:03,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440989048] [2024-06-21 20:43:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440989048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:03,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:03,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:43:03,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789500059] [2024-06-21 20:43:03,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:03,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:43:03,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:03,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:43:03,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:43:03,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:43:03,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 20:43:03,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:03,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:43:03,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:03,952 INFO L124 PetriNetUnfolderBase]: 1495/2422 cut-off events. [2024-06-21 20:43:03,953 INFO L125 PetriNetUnfolderBase]: For 3673/3673 co-relation queries the response was YES. [2024-06-21 20:43:03,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7038 conditions, 2422 events. 1495/2422 cut-off events. For 3673/3673 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12725 event pairs, 734 based on Foata normal form. 4/2418 useless extension candidates. Maximal degree in co-relation 7021. Up to 2212 conditions per place. [2024-06-21 20:43:03,965 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 45 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-21 20:43:03,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 364 flow [2024-06-21 20:43:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:43:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:43:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-21 20:43:03,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2024-06-21 20:43:03,967 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 5 states and 107 transitions. [2024-06-21 20:43:03,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 364 flow [2024-06-21 20:43:03,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:03,969 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-21 20:43:03,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-21 20:43:03,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-21 20:43:03,970 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-21 20:43:03,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 20:43:03,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:03,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:03,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:43:03,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:03,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash 649599816, now seen corresponding path program 1 times [2024-06-21 20:43:03,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:03,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355057408] [2024-06-21 20:43:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:04,606 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 20:43:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355057408] [2024-06-21 20:43:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355057408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:04,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:04,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375535387] [2024-06-21 20:43:04,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:04,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:04,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:04,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:04,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:04,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 20:43:04,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:04,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:04,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:05,243 INFO L124 PetriNetUnfolderBase]: 1746/2688 cut-off events. [2024-06-21 20:43:05,243 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2024-06-21 20:43:05,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8554 conditions, 2688 events. 1746/2688 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13395 event pairs, 828 based on Foata normal form. 4/2690 useless extension candidates. Maximal degree in co-relation 8535. Up to 2516 conditions per place. [2024-06-21 20:43:05,261 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-21 20:43:05,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 482 flow [2024-06-21 20:43:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-21 20:43:05,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038759689922481 [2024-06-21 20:43:05,263 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 130 transitions. [2024-06-21 20:43:05,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 482 flow [2024-06-21 20:43:05,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 460 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:05,267 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 288 flow [2024-06-21 20:43:05,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-21 20:43:05,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-21 20:43:05,269 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 288 flow [2024-06-21 20:43:05,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 20:43:05,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:05,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:05,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:43:05,270 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:05,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 657910296, now seen corresponding path program 2 times [2024-06-21 20:43:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:05,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204167160] [2024-06-21 20:43:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:05,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:05,936 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 20:43:05,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:05,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204167160] [2024-06-21 20:43:05,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204167160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:05,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:05,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:05,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111866809] [2024-06-21 20:43:05,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:05,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:05,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:05,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:05,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:05,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 20:43:05,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:05,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:05,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:06,568 INFO L124 PetriNetUnfolderBase]: 1736/2676 cut-off events. [2024-06-21 20:43:06,569 INFO L125 PetriNetUnfolderBase]: For 8105/8115 co-relation queries the response was YES. [2024-06-21 20:43:06,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9144 conditions, 2676 events. 1736/2676 cut-off events. For 8105/8115 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13333 event pairs, 827 based on Foata normal form. 14/2689 useless extension candidates. Maximal degree in co-relation 9124. Up to 2508 conditions per place. [2024-06-21 20:43:06,583 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 49 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-21 20:43:06,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 460 flow [2024-06-21 20:43:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 20:43:06,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 20:43:06,597 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 288 flow. Second operand 6 states and 124 transitions. [2024-06-21 20:43:06,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 460 flow [2024-06-21 20:43:06,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 428 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 20:43:06,602 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 296 flow [2024-06-21 20:43:06,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 20:43:06,603 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-06-21 20:43:06,603 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 296 flow [2024-06-21 20:43:06,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 20:43:06,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:06,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:06,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:43:06,603 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:06,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:06,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1432569102, now seen corresponding path program 1 times [2024-06-21 20:43:06,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:06,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908399116] [2024-06-21 20:43:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:06,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:07,893 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 20:43:07,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908399116] [2024-06-21 20:43:07,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908399116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:07,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:07,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:07,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016697799] [2024-06-21 20:43:07,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:07,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:07,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:07,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:43:07,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 296 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:07,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:07,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:43:07,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:08,407 INFO L124 PetriNetUnfolderBase]: 1823/2768 cut-off events. [2024-06-21 20:43:08,407 INFO L125 PetriNetUnfolderBase]: For 9784/9784 co-relation queries the response was YES. [2024-06-21 20:43:08,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9688 conditions, 2768 events. 1823/2768 cut-off events. For 9784/9784 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13605 event pairs, 592 based on Foata normal form. 6/2773 useless extension candidates. Maximal degree in co-relation 9667. Up to 2610 conditions per place. [2024-06-21 20:43:08,419 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 75 selfloop transitions, 18 changer transitions 0/99 dead transitions. [2024-06-21 20:43:08,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 608 flow [2024-06-21 20:43:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:43:08,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319767441860465 [2024-06-21 20:43:08,421 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 296 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:43:08,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 608 flow [2024-06-21 20:43:08,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 568 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:08,427 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 333 flow [2024-06-21 20:43:08,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=333, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-21 20:43:08,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-21 20:43:08,428 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 333 flow [2024-06-21 20:43:08,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:08,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:08,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:08,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:43:08,428 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:08,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:08,429 INFO L85 PathProgramCache]: Analyzing trace with hash 212596114, now seen corresponding path program 1 times [2024-06-21 20:43:08,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:08,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733129073] [2024-06-21 20:43:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:08,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:09,182 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 20:43:09,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:09,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733129073] [2024-06-21 20:43:09,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733129073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:09,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:09,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:09,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471117703] [2024-06-21 20:43:09,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:09,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:09,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:09,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:09,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:09,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 333 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:09,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:09,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:09,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:09,915 INFO L124 PetriNetUnfolderBase]: 1845/2795 cut-off events. [2024-06-21 20:43:09,915 INFO L125 PetriNetUnfolderBase]: For 12597/12597 co-relation queries the response was YES. [2024-06-21 20:43:09,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10392 conditions, 2795 events. 1845/2795 cut-off events. For 12597/12597 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13654 event pairs, 635 based on Foata normal form. 4/2797 useless extension candidates. Maximal degree in co-relation 10369. Up to 2586 conditions per place. [2024-06-21 20:43:09,931 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 24 changer transitions 0/96 dead transitions. [2024-06-21 20:43:09,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 675 flow [2024-06-21 20:43:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 20:43:09,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-21 20:43:09,932 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 333 flow. Second operand 7 states and 146 transitions. [2024-06-21 20:43:09,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 675 flow [2024-06-21 20:43:09,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 96 transitions, 624 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:09,938 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 396 flow [2024-06-21 20:43:09,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 20:43:09,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-21 20:43:09,940 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 396 flow [2024-06-21 20:43:09,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:09,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:09,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:09,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:43:09,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:09,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 212775604, now seen corresponding path program 2 times [2024-06-21 20:43:09,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:09,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124402502] [2024-06-21 20:43:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:09,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:10,693 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 20:43:10,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:10,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124402502] [2024-06-21 20:43:10,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124402502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:10,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:10,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:10,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972824023] [2024-06-21 20:43:10,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:10,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:10,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:10,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:10,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:10,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 396 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:10,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:10,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:10,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:11,440 INFO L124 PetriNetUnfolderBase]: 1867/2827 cut-off events. [2024-06-21 20:43:11,440 INFO L125 PetriNetUnfolderBase]: For 15849/15849 co-relation queries the response was YES. [2024-06-21 20:43:11,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11131 conditions, 2827 events. 1867/2827 cut-off events. For 15849/15849 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13781 event pairs, 635 based on Foata normal form. 4/2829 useless extension candidates. Maximal degree in co-relation 11106. Up to 2605 conditions per place. [2024-06-21 20:43:11,453 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-21 20:43:11,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 714 flow [2024-06-21 20:43:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 20:43:11,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-21 20:43:11,454 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 396 flow. Second operand 7 states and 144 transitions. [2024-06-21 20:43:11,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 714 flow [2024-06-21 20:43:11,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 668 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:11,463 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 442 flow [2024-06-21 20:43:11,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-21 20:43:11,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-21 20:43:11,464 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 442 flow [2024-06-21 20:43:11,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:11,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:11,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:11,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:43:11,465 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:11,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1079615854, now seen corresponding path program 3 times [2024-06-21 20:43:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:11,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66233130] [2024-06-21 20:43:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:12,173 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 20:43:12,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:12,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66233130] [2024-06-21 20:43:12,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66233130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:12,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:12,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:12,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774614529] [2024-06-21 20:43:12,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:12,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:12,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:12,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:12,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:12,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:12,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:12,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:12,844 INFO L124 PetriNetUnfolderBase]: 1857/2816 cut-off events. [2024-06-21 20:43:12,844 INFO L125 PetriNetUnfolderBase]: For 18378/18388 co-relation queries the response was YES. [2024-06-21 20:43:12,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11367 conditions, 2816 events. 1857/2816 cut-off events. For 18378/18388 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13802 event pairs, 646 based on Foata normal form. 11/2826 useless extension candidates. Maximal degree in co-relation 11340. Up to 2597 conditions per place. [2024-06-21 20:43:12,859 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 26 changer transitions 0/90 dead transitions. [2024-06-21 20:43:12,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 666 flow [2024-06-21 20:43:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:43:12,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:43:12,861 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 442 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:43:12,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 666 flow [2024-06-21 20:43:12,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 602 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:12,874 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 438 flow [2024-06-21 20:43:12,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-06-21 20:43:12,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-21 20:43:12,874 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 438 flow [2024-06-21 20:43:12,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:12,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:12,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:12,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:43:12,875 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:12,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:12,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2132121964, now seen corresponding path program 1 times [2024-06-21 20:43:12,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:12,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330086083] [2024-06-21 20:43:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:12,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:13,843 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 20:43:13,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:13,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330086083] [2024-06-21 20:43:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330086083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:13,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:13,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:13,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768182941] [2024-06-21 20:43:13,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:13,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:13,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:13,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:13,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:13,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:43:13,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 20:43:13,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:13,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:43:13,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:14,483 INFO L124 PetriNetUnfolderBase]: 1532/2454 cut-off events. [2024-06-21 20:43:14,484 INFO L125 PetriNetUnfolderBase]: For 17391/17391 co-relation queries the response was YES. [2024-06-21 20:43:14,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9863 conditions, 2454 events. 1532/2454 cut-off events. For 17391/17391 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12779 event pairs, 547 based on Foata normal form. 4/2442 useless extension candidates. Maximal degree in co-relation 9835. Up to 2219 conditions per place. [2024-06-21 20:43:14,497 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 69 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-06-21 20:43:14,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 695 flow [2024-06-21 20:43:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:43:14,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 20:43:14,499 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 438 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:43:14,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 695 flow [2024-06-21 20:43:14,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 614 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:14,511 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 443 flow [2024-06-21 20:43:14,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-06-21 20:43:14,512 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-21 20:43:14,512 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 443 flow [2024-06-21 20:43:14,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 20:43:14,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:14,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:14,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:43:14,513 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:14,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash -683826412, now seen corresponding path program 1 times [2024-06-21 20:43:14,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:14,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768324352] [2024-06-21 20:43:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:14,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:15,186 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 20:43:15,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768324352] [2024-06-21 20:43:15,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768324352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:15,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:15,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:43:15,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493024816] [2024-06-21 20:43:15,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:15,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:43:15,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:15,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:43:15,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:43:15,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:43:15,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 443 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 20:43:15,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:15,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:43:15,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:15,575 INFO L124 PetriNetUnfolderBase]: 1428/2352 cut-off events. [2024-06-21 20:43:15,575 INFO L125 PetriNetUnfolderBase]: For 19904/19904 co-relation queries the response was YES. [2024-06-21 20:43:15,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9934 conditions, 2352 events. 1428/2352 cut-off events. For 19904/19904 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12639 event pairs, 556 based on Foata normal form. 1/2352 useless extension candidates. Maximal degree in co-relation 9904. Up to 2130 conditions per place. [2024-06-21 20:43:15,588 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 63 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2024-06-21 20:43:15,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 627 flow [2024-06-21 20:43:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:43:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:43:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-21 20:43:15,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:43:15,593 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 443 flow. Second operand 5 states and 105 transitions. [2024-06-21 20:43:15,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 627 flow [2024-06-21 20:43:15,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 586 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:15,609 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 452 flow [2024-06-21 20:43:15,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-21 20:43:15,610 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-21 20:43:15,610 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 452 flow [2024-06-21 20:43:15,610 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 20:43:15,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:15,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:15,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:43:15,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:15,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1648445975, now seen corresponding path program 1 times [2024-06-21 20:43:15,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:15,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739190817] [2024-06-21 20:43:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:15,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:16,467 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 20:43:16,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:16,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739190817] [2024-06-21 20:43:16,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739190817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:16,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:16,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:16,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626158015] [2024-06-21 20:43:16,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:16,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:16,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:16,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:16,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 452 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:16,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:16,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:16,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:17,279 INFO L124 PetriNetUnfolderBase]: 1868/2825 cut-off events. [2024-06-21 20:43:17,280 INFO L125 PetriNetUnfolderBase]: For 27082/27082 co-relation queries the response was YES. [2024-06-21 20:43:17,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12560 conditions, 2825 events. 1868/2825 cut-off events. For 27082/27082 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13802 event pairs, 588 based on Foata normal form. 4/2827 useless extension candidates. Maximal degree in co-relation 12529. Up to 2531 conditions per place. [2024-06-21 20:43:17,293 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 37 changer transitions 0/120 dead transitions. [2024-06-21 20:43:17,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 120 transitions, 898 flow [2024-06-21 20:43:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 20:43:17,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:43:17,295 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 452 flow. Second operand 8 states and 168 transitions. [2024-06-21 20:43:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 120 transitions, 898 flow [2024-06-21 20:43:17,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 120 transitions, 870 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:17,310 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 576 flow [2024-06-21 20:43:17,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-21 20:43:17,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-21 20:43:17,311 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 576 flow [2024-06-21 20:43:17,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:17,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:17,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:17,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:43:17,311 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:17,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1648296245, now seen corresponding path program 2 times [2024-06-21 20:43:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:17,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810799101] [2024-06-21 20:43:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:17,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:18,121 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 20:43:18,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:18,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810799101] [2024-06-21 20:43:18,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810799101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:18,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:18,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:18,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324045665] [2024-06-21 20:43:18,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:18,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:18,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:18,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:18,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:18,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:18,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:18,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:18,954 INFO L124 PetriNetUnfolderBase]: 1890/2857 cut-off events. [2024-06-21 20:43:18,954 INFO L125 PetriNetUnfolderBase]: For 31661/31661 co-relation queries the response was YES. [2024-06-21 20:43:18,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13457 conditions, 2857 events. 1890/2857 cut-off events. For 31661/31661 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13922 event pairs, 588 based on Foata normal form. 4/2859 useless extension candidates. Maximal degree in co-relation 13425. Up to 2550 conditions per place. [2024-06-21 20:43:18,970 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 38 changer transitions 0/120 dead transitions. [2024-06-21 20:43:18,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 120 transitions, 992 flow [2024-06-21 20:43:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:43:18,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-21 20:43:18,973 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 576 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:43:18,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 120 transitions, 992 flow [2024-06-21 20:43:18,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 913 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:18,992 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 619 flow [2024-06-21 20:43:18,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=619, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-21 20:43:18,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 20:43:18,993 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 619 flow [2024-06-21 20:43:18,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:18,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:18,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:18,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:43:18,994 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:18,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1642732055, now seen corresponding path program 3 times [2024-06-21 20:43:18,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:18,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960517895] [2024-06-21 20:43:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:19,825 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 20:43:19,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960517895] [2024-06-21 20:43:19,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960517895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:19,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:19,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:19,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881115779] [2024-06-21 20:43:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:19,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:19,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:19,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 619 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:19,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:19,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:19,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:20,727 INFO L124 PetriNetUnfolderBase]: 1912/2889 cut-off events. [2024-06-21 20:43:20,728 INFO L125 PetriNetUnfolderBase]: For 35265/35265 co-relation queries the response was YES. [2024-06-21 20:43:20,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13827 conditions, 2889 events. 1912/2889 cut-off events. For 35265/35265 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14071 event pairs, 593 based on Foata normal form. 4/2891 useless extension candidates. Maximal degree in co-relation 13793. Up to 2569 conditions per place. [2024-06-21 20:43:20,745 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 75 selfloop transitions, 40 changer transitions 0/120 dead transitions. [2024-06-21 20:43:20,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1029 flow [2024-06-21 20:43:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 20:43:20,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:43:20,747 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 619 flow. Second operand 8 states and 164 transitions. [2024-06-21 20:43:20,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1029 flow [2024-06-21 20:43:20,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 120 transitions, 951 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:20,775 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 665 flow [2024-06-21 20:43:20,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-21 20:43:20,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-21 20:43:20,775 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 665 flow [2024-06-21 20:43:20,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:20,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:20,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:20,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:43:20,776 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:20,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash 891648375, now seen corresponding path program 4 times [2024-06-21 20:43:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:20,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919836067] [2024-06-21 20:43:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:20,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:21,563 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 20:43:21,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:21,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919836067] [2024-06-21 20:43:21,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919836067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:21,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:21,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:21,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708074918] [2024-06-21 20:43:21,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:21,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:21,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:21,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:21,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:21,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 665 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:21,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:21,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:21,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:22,385 INFO L124 PetriNetUnfolderBase]: 1902/2879 cut-off events. [2024-06-21 20:43:22,385 INFO L125 PetriNetUnfolderBase]: For 38808/38814 co-relation queries the response was YES. [2024-06-21 20:43:22,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13954 conditions, 2879 events. 1902/2879 cut-off events. For 38808/38814 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14056 event pairs, 616 based on Foata normal form. 7/2885 useless extension candidates. Maximal degree in co-relation 13919. Up to 2561 conditions per place. [2024-06-21 20:43:22,402 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 40 changer transitions 0/115 dead transitions. [2024-06-21 20:43:22,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 115 transitions, 959 flow [2024-06-21 20:43:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:43:22,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 20:43:22,403 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 665 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:43:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 115 transitions, 959 flow [2024-06-21 20:43:22,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 868 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:22,430 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 662 flow [2024-06-21 20:43:22,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=662, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2024-06-21 20:43:22,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-21 20:43:22,430 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 662 flow [2024-06-21 20:43:22,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:22,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:22,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:43:22,431 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:22,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:22,431 INFO L85 PathProgramCache]: Analyzing trace with hash 232426522, now seen corresponding path program 1 times [2024-06-21 20:43:22,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:22,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950892667] [2024-06-21 20:43:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:22,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:23,494 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 20:43:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950892667] [2024-06-21 20:43:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950892667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:23,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:23,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538851365] [2024-06-21 20:43:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:23,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:23,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:43:23,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 662 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:23,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:23,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:43:23,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:23,918 INFO L124 PetriNetUnfolderBase]: 1461/2407 cut-off events. [2024-06-21 20:43:23,918 INFO L125 PetriNetUnfolderBase]: For 34808/34808 co-relation queries the response was YES. [2024-06-21 20:43:23,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11752 conditions, 2407 events. 1461/2407 cut-off events. For 34808/34808 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12900 event pairs, 528 based on Foata normal form. 1/2405 useless extension candidates. Maximal degree in co-relation 11716. Up to 2140 conditions per place. [2024-06-21 20:43:23,933 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 72 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2024-06-21 20:43:23,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 876 flow [2024-06-21 20:43:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 20:43:23,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-21 20:43:23,935 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 662 flow. Second operand 6 states and 122 transitions. [2024-06-21 20:43:23,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 876 flow [2024-06-21 20:43:23,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 741 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:43:23,959 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 587 flow [2024-06-21 20:43:23,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=587, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2024-06-21 20:43:23,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-21 20:43:23,960 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 587 flow [2024-06-21 20:43:23,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:23,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:23,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:23,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:43:23,961 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:23,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash 442247839, now seen corresponding path program 1 times [2024-06-21 20:43:23,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:23,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810549946] [2024-06-21 20:43:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:23,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:24,927 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 20:43:24,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:24,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810549946] [2024-06-21 20:43:24,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810549946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:24,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:24,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:24,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383185786] [2024-06-21 20:43:24,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:24,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:25,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:25,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 587 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:25,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:25,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:25,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:25,803 INFO L124 PetriNetUnfolderBase]: 1918/2907 cut-off events. [2024-06-21 20:43:25,803 INFO L125 PetriNetUnfolderBase]: For 45753/45753 co-relation queries the response was YES. [2024-06-21 20:43:25,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14516 conditions, 2907 events. 1918/2907 cut-off events. For 45753/45753 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14177 event pairs, 628 based on Foata normal form. 4/2910 useless extension candidates. Maximal degree in co-relation 14480. Up to 2762 conditions per place. [2024-06-21 20:43:25,819 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 109 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2024-06-21 20:43:25,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 134 transitions, 985 flow [2024-06-21 20:43:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:43:25,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 20:43:25,820 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 587 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:43:25,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 134 transitions, 985 flow [2024-06-21 20:43:25,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 947 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:25,840 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 639 flow [2024-06-21 20:43:25,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=639, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2024-06-21 20:43:25,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-21 20:43:25,840 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 639 flow [2024-06-21 20:43:25,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:25,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:25,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:25,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:43:25,841 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:25,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:25,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1858158861, now seen corresponding path program 2 times [2024-06-21 20:43:25,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:25,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317969262] [2024-06-21 20:43:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:25,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:26,690 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 20:43:26,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:26,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317969262] [2024-06-21 20:43:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317969262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:26,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:26,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085080501] [2024-06-21 20:43:26,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:26,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:26,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 639 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:26,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:26,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:26,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:27,682 INFO L124 PetriNetUnfolderBase]: 1940/2947 cut-off events. [2024-06-21 20:43:27,682 INFO L125 PetriNetUnfolderBase]: For 51013/51013 co-relation queries the response was YES. [2024-06-21 20:43:27,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15293 conditions, 2947 events. 1940/2947 cut-off events. For 51013/51013 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14501 event pairs, 544 based on Foata normal form. 4/2949 useless extension candidates. Maximal degree in co-relation 15256. Up to 2512 conditions per place. [2024-06-21 20:43:27,695 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 87 selfloop transitions, 51 changer transitions 0/143 dead transitions. [2024-06-21 20:43:27,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 143 transitions, 1187 flow [2024-06-21 20:43:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:43:27,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 20:43:27,706 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 639 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:43:27,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 143 transitions, 1187 flow [2024-06-21 20:43:27,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 143 transitions, 1121 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:27,729 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 773 flow [2024-06-21 20:43:27,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=773, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-06-21 20:43:27,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 20:43:27,730 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 773 flow [2024-06-21 20:43:27,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:27,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:27,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:27,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:43:27,730 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:27,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1853517231, now seen corresponding path program 3 times [2024-06-21 20:43:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123847126] [2024-06-21 20:43:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:28,631 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 20:43:28,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:28,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123847126] [2024-06-21 20:43:28,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123847126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:28,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:28,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:28,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016885683] [2024-06-21 20:43:28,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:28,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:28,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:28,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:28,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:28,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:28,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:28,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:28,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:29,564 INFO L124 PetriNetUnfolderBase]: 1962/2989 cut-off events. [2024-06-21 20:43:29,564 INFO L125 PetriNetUnfolderBase]: For 57694/57694 co-relation queries the response was YES. [2024-06-21 20:43:29,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16157 conditions, 2989 events. 1962/2989 cut-off events. For 57694/57694 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14810 event pairs, 549 based on Foata normal form. 4/2991 useless extension candidates. Maximal degree in co-relation 16119. Up to 2531 conditions per place. [2024-06-21 20:43:29,581 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 86 selfloop transitions, 52 changer transitions 0/143 dead transitions. [2024-06-21 20:43:29,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 143 transitions, 1281 flow [2024-06-21 20:43:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 20:43:29,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 20:43:29,583 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 773 flow. Second operand 9 states and 186 transitions. [2024-06-21 20:43:29,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 143 transitions, 1281 flow [2024-06-21 20:43:29,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 143 transitions, 1186 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:29,615 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 838 flow [2024-06-21 20:43:29,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=838, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-21 20:43:29,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-21 20:43:29,616 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 838 flow [2024-06-21 20:43:29,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:29,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:29,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:29,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:43:29,616 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:29,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:29,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1680781077, now seen corresponding path program 1 times [2024-06-21 20:43:29,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:29,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876612607] [2024-06-21 20:43:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:29,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:30,602 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 20:43:30,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876612607] [2024-06-21 20:43:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876612607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669283596] [2024-06-21 20:43:30,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:30,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:30,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:30,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:30,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 838 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:30,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:30,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:30,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:31,324 INFO L124 PetriNetUnfolderBase]: 1893/2953 cut-off events. [2024-06-21 20:43:31,324 INFO L125 PetriNetUnfolderBase]: For 63462/63464 co-relation queries the response was YES. [2024-06-21 20:43:31,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16379 conditions, 2953 events. 1893/2953 cut-off events. For 63462/63464 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15154 event pairs, 629 based on Foata normal form. 6/2950 useless extension candidates. Maximal degree in co-relation 16339. Up to 2678 conditions per place. [2024-06-21 20:43:31,342 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 103 selfloop transitions, 30 changer transitions 0/143 dead transitions. [2024-06-21 20:43:31,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 143 transitions, 1302 flow [2024-06-21 20:43:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:43:31,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 20:43:31,343 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 838 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:43:31,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 143 transitions, 1302 flow [2024-06-21 20:43:31,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 143 transitions, 1181 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:31,368 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 953 flow [2024-06-21 20:43:31,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=953, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-21 20:43:31,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-21 20:43:31,369 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 953 flow [2024-06-21 20:43:31,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:31,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:31,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:31,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:43:31,369 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:31,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1048264393, now seen corresponding path program 2 times [2024-06-21 20:43:31,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:31,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066969860] [2024-06-21 20:43:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:31,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:32,354 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 20:43:32,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066969860] [2024-06-21 20:43:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066969860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:32,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491739360] [2024-06-21 20:43:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:32,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:32,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 953 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:32,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:32,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:32,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:33,155 INFO L124 PetriNetUnfolderBase]: 1970/3074 cut-off events. [2024-06-21 20:43:33,155 INFO L125 PetriNetUnfolderBase]: For 70120/70122 co-relation queries the response was YES. [2024-06-21 20:43:33,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17640 conditions, 3074 events. 1970/3074 cut-off events. For 70120/70122 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15820 event pairs, 618 based on Foata normal form. 6/3078 useless extension candidates. Maximal degree in co-relation 17595. Up to 2756 conditions per place. [2024-06-21 20:43:33,178 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 112 selfloop transitions, 53 changer transitions 0/175 dead transitions. [2024-06-21 20:43:33,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 175 transitions, 1666 flow [2024-06-21 20:43:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 20:43:33,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-21 20:43:33,179 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 953 flow. Second operand 9 states and 183 transitions. [2024-06-21 20:43:33,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 175 transitions, 1666 flow [2024-06-21 20:43:33,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 175 transitions, 1563 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 20:43:33,251 INFO L231 Difference]: Finished difference. Result has 114 places, 143 transitions, 1315 flow [2024-06-21 20:43:33,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1315, PETRI_PLACES=114, PETRI_TRANSITIONS=143} [2024-06-21 20:43:33,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-21 20:43:33,252 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 143 transitions, 1315 flow [2024-06-21 20:43:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:33,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:33,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:33,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:43:33,252 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:33,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1681027341, now seen corresponding path program 4 times [2024-06-21 20:43:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:33,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749091046] [2024-06-21 20:43:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:33,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:34,160 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 20:43:34,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:34,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749091046] [2024-06-21 20:43:34,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749091046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:34,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:34,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338376784] [2024-06-21 20:43:34,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:34,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:34,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:34,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:34,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 143 transitions, 1315 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:34,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:34,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:34,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:35,086 INFO L124 PetriNetUnfolderBase]: 2112/3249 cut-off events. [2024-06-21 20:43:35,086 INFO L125 PetriNetUnfolderBase]: For 77522/77522 co-relation queries the response was YES. [2024-06-21 20:43:35,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19106 conditions, 3249 events. 2112/3249 cut-off events. For 77522/77522 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16390 event pairs, 572 based on Foata normal form. 4/3251 useless extension candidates. Maximal degree in co-relation 19056. Up to 2655 conditions per place. [2024-06-21 20:43:35,107 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 100 selfloop transitions, 78 changer transitions 0/183 dead transitions. [2024-06-21 20:43:35,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 183 transitions, 1940 flow [2024-06-21 20:43:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 20:43:35,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-21 20:43:35,108 INFO L175 Difference]: Start difference. First operand has 114 places, 143 transitions, 1315 flow. Second operand 9 states and 184 transitions. [2024-06-21 20:43:35,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 183 transitions, 1940 flow [2024-06-21 20:43:35,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 183 transitions, 1836 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:35,159 INFO L231 Difference]: Finished difference. Result has 119 places, 146 transitions, 1418 flow [2024-06-21 20:43:35,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1418, PETRI_PLACES=119, PETRI_TRANSITIONS=146} [2024-06-21 20:43:35,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-21 20:43:35,159 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 146 transitions, 1418 flow [2024-06-21 20:43:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:35,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:43:35,159 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:35,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 3684283, now seen corresponding path program 1 times [2024-06-21 20:43:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:35,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889151104] [2024-06-21 20:43:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:35,819 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 20:43:35,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:35,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889151104] [2024-06-21 20:43:35,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889151104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:35,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:35,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:35,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782118515] [2024-06-21 20:43:35,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:35,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:35,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:35,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:35,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:43:35,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 146 transitions, 1418 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 20:43:35,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:35,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:43:35,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:36,395 INFO L124 PetriNetUnfolderBase]: 1851/2943 cut-off events. [2024-06-21 20:43:36,396 INFO L125 PetriNetUnfolderBase]: For 81505/81515 co-relation queries the response was YES. [2024-06-21 20:43:36,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18322 conditions, 2943 events. 1851/2943 cut-off events. For 81505/81515 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15445 event pairs, 590 based on Foata normal form. 1/2918 useless extension candidates. Maximal degree in co-relation 18271. Up to 2706 conditions per place. [2024-06-21 20:43:36,421 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 128 selfloop transitions, 19 changer transitions 0/163 dead transitions. [2024-06-21 20:43:36,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 163 transitions, 1786 flow [2024-06-21 20:43:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 20:43:36,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 20:43:36,422 INFO L175 Difference]: Start difference. First operand has 119 places, 146 transitions, 1418 flow. Second operand 6 states and 123 transitions. [2024-06-21 20:43:36,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 163 transitions, 1786 flow [2024-06-21 20:43:36,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 163 transitions, 1634 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:36,476 INFO L231 Difference]: Finished difference. Result has 119 places, 149 transitions, 1348 flow [2024-06-21 20:43:36,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1348, PETRI_PLACES=119, PETRI_TRANSITIONS=149} [2024-06-21 20:43:36,476 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-21 20:43:36,476 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 149 transitions, 1348 flow [2024-06-21 20:43:36,477 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 20:43:36,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:36,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:36,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:43:36,477 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:36,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -151387523, now seen corresponding path program 3 times [2024-06-21 20:43:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:36,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857269712] [2024-06-21 20:43:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:36,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:37,414 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 20:43:37,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:37,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857269712] [2024-06-21 20:43:37,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857269712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:37,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:37,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:37,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360065951] [2024-06-21 20:43:37,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:37,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:37,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 149 transitions, 1348 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:37,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:37,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:37,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:38,223 INFO L124 PetriNetUnfolderBase]: 2032/3184 cut-off events. [2024-06-21 20:43:38,223 INFO L125 PetriNetUnfolderBase]: For 88218/88220 co-relation queries the response was YES. [2024-06-21 20:43:38,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19530 conditions, 3184 events. 2032/3184 cut-off events. For 88218/88220 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16537 event pairs, 612 based on Foata normal form. 6/3175 useless extension candidates. Maximal degree in co-relation 19478. Up to 2849 conditions per place. [2024-06-21 20:43:38,241 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 116 selfloop transitions, 61 changer transitions 0/187 dead transitions. [2024-06-21 20:43:38,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 187 transitions, 1960 flow [2024-06-21 20:43:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:43:38,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 20:43:38,242 INFO L175 Difference]: Start difference. First operand has 119 places, 149 transitions, 1348 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:43:38,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 187 transitions, 1960 flow [2024-06-21 20:43:38,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 187 transitions, 1904 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:38,289 INFO L231 Difference]: Finished difference. Result has 124 places, 162 transitions, 1626 flow [2024-06-21 20:43:38,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1626, PETRI_PLACES=124, PETRI_TRANSITIONS=162} [2024-06-21 20:43:38,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 20:43:38,290 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 162 transitions, 1626 flow [2024-06-21 20:43:38,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:38,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:38,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:38,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:43:38,290 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:38,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash -269762765, now seen corresponding path program 4 times [2024-06-21 20:43:38,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:38,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849227794] [2024-06-21 20:43:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:38,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:39,174 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 20:43:39,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:39,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849227794] [2024-06-21 20:43:39,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849227794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:39,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:39,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:39,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786843410] [2024-06-21 20:43:39,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:39,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:39,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:39,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:39,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:39,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 162 transitions, 1626 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:39,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:39,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:39,972 INFO L124 PetriNetUnfolderBase]: 2049/3210 cut-off events. [2024-06-21 20:43:39,972 INFO L125 PetriNetUnfolderBase]: For 96870/96874 co-relation queries the response was YES. [2024-06-21 20:43:39,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20515 conditions, 3210 events. 2049/3210 cut-off events. For 96870/96874 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16709 event pairs, 571 based on Foata normal form. 8/3210 useless extension candidates. Maximal degree in co-relation 20461. Up to 2759 conditions per place. [2024-06-21 20:43:39,995 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 112 selfloop transitions, 72 changer transitions 0/194 dead transitions. [2024-06-21 20:43:39,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 194 transitions, 2270 flow [2024-06-21 20:43:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:43:39,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 20:43:39,996 INFO L175 Difference]: Start difference. First operand has 124 places, 162 transitions, 1626 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:43:39,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 194 transitions, 2270 flow [2024-06-21 20:43:40,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 194 transitions, 2163 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:40,048 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1766 flow [2024-06-21 20:43:40,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1766, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-21 20:43:40,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-21 20:43:40,048 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1766 flow [2024-06-21 20:43:40,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:40,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:40,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:43:40,049 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:40,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash -565338155, now seen corresponding path program 5 times [2024-06-21 20:43:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414638968] [2024-06-21 20:43:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:40,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:40,999 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 20:43:41,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:41,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414638968] [2024-06-21 20:43:41,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414638968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:41,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:41,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:41,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454217461] [2024-06-21 20:43:41,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:41,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:41,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:41,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:41,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:41,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:41,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1766 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:41,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:41,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:41,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:41,792 INFO L124 PetriNetUnfolderBase]: 2041/3196 cut-off events. [2024-06-21 20:43:41,792 INFO L125 PetriNetUnfolderBase]: For 101472/101476 co-relation queries the response was YES. [2024-06-21 20:43:41,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20191 conditions, 3196 events. 2041/3196 cut-off events. For 101472/101476 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16566 event pairs, 613 based on Foata normal form. 8/3196 useless extension candidates. Maximal degree in co-relation 20136. Up to 2864 conditions per place. [2024-06-21 20:43:41,816 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 120 selfloop transitions, 60 changer transitions 0/190 dead transitions. [2024-06-21 20:43:41,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 190 transitions, 2204 flow [2024-06-21 20:43:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:43:41,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:43:41,817 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1766 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:43:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 190 transitions, 2204 flow [2024-06-21 20:43:41,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 190 transitions, 2066 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:41,880 INFO L231 Difference]: Finished difference. Result has 134 places, 166 transitions, 1756 flow [2024-06-21 20:43:41,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1756, PETRI_PLACES=134, PETRI_TRANSITIONS=166} [2024-06-21 20:43:41,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-21 20:43:41,881 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 166 transitions, 1756 flow [2024-06-21 20:43:41,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:41,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:41,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:41,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:43:41,881 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:41,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash -565584419, now seen corresponding path program 5 times [2024-06-21 20:43:41,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:41,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709806379] [2024-06-21 20:43:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:41,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:42,743 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 20:43:42,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:42,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709806379] [2024-06-21 20:43:42,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709806379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:42,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:42,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:42,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578946435] [2024-06-21 20:43:42,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:42,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:42,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:42,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:42,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:42,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 166 transitions, 1756 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:42,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:42,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:42,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:43,721 INFO L124 PetriNetUnfolderBase]: 2151/3316 cut-off events. [2024-06-21 20:43:43,721 INFO L125 PetriNetUnfolderBase]: For 105473/105473 co-relation queries the response was YES. [2024-06-21 20:43:43,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20780 conditions, 3316 events. 2151/3316 cut-off events. For 105473/105473 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16770 event pairs, 590 based on Foata normal form. 4/3318 useless extension candidates. Maximal degree in co-relation 20723. Up to 2708 conditions per place. [2024-06-21 20:43:43,745 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 112 selfloop transitions, 81 changer transitions 0/198 dead transitions. [2024-06-21 20:43:43,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 198 transitions, 2248 flow [2024-06-21 20:43:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:43:43,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 20:43:43,746 INFO L175 Difference]: Start difference. First operand has 134 places, 166 transitions, 1756 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:43:43,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 198 transitions, 2248 flow [2024-06-21 20:43:43,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 198 transitions, 2056 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 20:43:43,809 INFO L231 Difference]: Finished difference. Result has 135 places, 166 transitions, 1734 flow [2024-06-21 20:43:43,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1734, PETRI_PLACES=135, PETRI_TRANSITIONS=166} [2024-06-21 20:43:43,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 20:43:43,810 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 166 transitions, 1734 flow [2024-06-21 20:43:43,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:43,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:43,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:43,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:43:43,811 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:43,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash -27150797, now seen corresponding path program 2 times [2024-06-21 20:43:43,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:43,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123009110] [2024-06-21 20:43:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:43,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:44,525 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 20:43:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123009110] [2024-06-21 20:43:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123009110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:44,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:44,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:44,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804342004] [2024-06-21 20:43:44,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:44,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:44,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:44,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:43:44,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 166 transitions, 1734 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 20:43:44,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:44,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:43:44,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:45,044 INFO L124 PetriNetUnfolderBase]: 1882/2990 cut-off events. [2024-06-21 20:43:45,044 INFO L125 PetriNetUnfolderBase]: For 110611/110630 co-relation queries the response was YES. [2024-06-21 20:43:45,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19766 conditions, 2990 events. 1882/2990 cut-off events. For 110611/110630 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15729 event pairs, 601 based on Foata normal form. 5/2962 useless extension candidates. Maximal degree in co-relation 19709. Up to 2750 conditions per place. [2024-06-21 20:43:45,068 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 139 selfloop transitions, 23 changer transitions 0/178 dead transitions. [2024-06-21 20:43:45,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 178 transitions, 2126 flow [2024-06-21 20:43:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 20:43:45,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:43:45,069 INFO L175 Difference]: Start difference. First operand has 135 places, 166 transitions, 1734 flow. Second operand 6 states and 119 transitions. [2024-06-21 20:43:45,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 178 transitions, 2126 flow [2024-06-21 20:43:45,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 178 transitions, 1863 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 20:43:45,118 INFO L231 Difference]: Finished difference. Result has 131 places, 169 transitions, 1569 flow [2024-06-21 20:43:45,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1569, PETRI_PLACES=131, PETRI_TRANSITIONS=169} [2024-06-21 20:43:45,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-21 20:43:45,118 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 169 transitions, 1569 flow [2024-06-21 20:43:45,118 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 20:43:45,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:45,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:45,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:43:45,119 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:45,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:45,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1996682947, now seen corresponding path program 1 times [2024-06-21 20:43:45,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:45,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297761538] [2024-06-21 20:43:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:45,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:45,800 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 20:43:45,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297761538] [2024-06-21 20:43:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297761538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:45,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:45,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369800292] [2024-06-21 20:43:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:45,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:43:45,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 169 transitions, 1569 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:45,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:45,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:43:45,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:46,373 INFO L124 PetriNetUnfolderBase]: 1812/2941 cut-off events. [2024-06-21 20:43:46,374 INFO L125 PetriNetUnfolderBase]: For 98647/98649 co-relation queries the response was YES. [2024-06-21 20:43:46,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18427 conditions, 2941 events. 1812/2941 cut-off events. For 98647/98649 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15786 event pairs, 540 based on Foata normal form. 4/2937 useless extension candidates. Maximal degree in co-relation 18369. Up to 2665 conditions per place. [2024-06-21 20:43:46,393 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 161 selfloop transitions, 12 changer transitions 0/184 dead transitions. [2024-06-21 20:43:46,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 184 transitions, 1985 flow [2024-06-21 20:43:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 20:43:46,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 20:43:46,395 INFO L175 Difference]: Start difference. First operand has 131 places, 169 transitions, 1569 flow. Second operand 6 states and 121 transitions. [2024-06-21 20:43:46,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 184 transitions, 1985 flow [2024-06-21 20:43:46,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 184 transitions, 1909 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:46,490 INFO L231 Difference]: Finished difference. Result has 133 places, 172 transitions, 1563 flow [2024-06-21 20:43:46,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1563, PETRI_PLACES=133, PETRI_TRANSITIONS=172} [2024-06-21 20:43:46,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-21 20:43:46,491 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 172 transitions, 1563 flow [2024-06-21 20:43:46,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:46,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:46,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:46,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:43:46,491 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:46,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1384718731, now seen corresponding path program 2 times [2024-06-21 20:43:46,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:46,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250495218] [2024-06-21 20:43:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:46,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:47,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:47,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250495218] [2024-06-21 20:43:47,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250495218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:47,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:47,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:47,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275638747] [2024-06-21 20:43:47,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:47,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:47,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:47,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:47,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:43:47,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 172 transitions, 1563 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:47,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:47,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:43:47,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:47,771 INFO L124 PetriNetUnfolderBase]: 1817/2950 cut-off events. [2024-06-21 20:43:47,771 INFO L125 PetriNetUnfolderBase]: For 103048/103052 co-relation queries the response was YES. [2024-06-21 20:43:47,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18865 conditions, 2950 events. 1817/2950 cut-off events. For 103048/103052 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15928 event pairs, 544 based on Foata normal form. 6/2948 useless extension candidates. Maximal degree in co-relation 18806. Up to 2659 conditions per place. [2024-06-21 20:43:47,788 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 157 selfloop transitions, 17 changer transitions 0/185 dead transitions. [2024-06-21 20:43:47,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 185 transitions, 1981 flow [2024-06-21 20:43:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 20:43:47,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 20:43:47,789 INFO L175 Difference]: Start difference. First operand has 133 places, 172 transitions, 1563 flow. Second operand 6 states and 121 transitions. [2024-06-21 20:43:47,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 185 transitions, 1981 flow [2024-06-21 20:43:47,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 185 transitions, 1933 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:47,846 INFO L231 Difference]: Finished difference. Result has 135 places, 175 transitions, 1601 flow [2024-06-21 20:43:47,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1601, PETRI_PLACES=135, PETRI_TRANSITIONS=175} [2024-06-21 20:43:47,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 20:43:47,847 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 175 transitions, 1601 flow [2024-06-21 20:43:47,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:47,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:47,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:47,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:43:47,847 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:47,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1624242289, now seen corresponding path program 1 times [2024-06-21 20:43:47,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:47,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107088089] [2024-06-21 20:43:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:47,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:48,734 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 20:43:48,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:48,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107088089] [2024-06-21 20:43:48,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107088089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:48,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:48,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:48,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912648270] [2024-06-21 20:43:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:48,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:48,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 175 transitions, 1601 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:48,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:48,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:48,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:49,598 INFO L124 PetriNetUnfolderBase]: 2177/3360 cut-off events. [2024-06-21 20:43:49,598 INFO L125 PetriNetUnfolderBase]: For 131111/131111 co-relation queries the response was YES. [2024-06-21 20:43:49,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22274 conditions, 3360 events. 2177/3360 cut-off events. For 131111/131111 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 17141 event pairs, 603 based on Foata normal form. 4/3362 useless extension candidates. Maximal degree in co-relation 22214. Up to 2957 conditions per place. [2024-06-21 20:43:49,621 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 138 selfloop transitions, 70 changer transitions 0/213 dead transitions. [2024-06-21 20:43:49,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 213 transitions, 2175 flow [2024-06-21 20:43:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:43:49,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:43:49,623 INFO L175 Difference]: Start difference. First operand has 135 places, 175 transitions, 1601 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:43:49,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 213 transitions, 2175 flow [2024-06-21 20:43:49,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 213 transitions, 2111 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:49,701 INFO L231 Difference]: Finished difference. Result has 141 places, 180 transitions, 1752 flow [2024-06-21 20:43:49,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1752, PETRI_PLACES=141, PETRI_TRANSITIONS=180} [2024-06-21 20:43:49,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-21 20:43:49,702 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 180 transitions, 1752 flow [2024-06-21 20:43:49,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:49,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:49,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:49,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:43:49,703 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:49,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2036885019, now seen corresponding path program 2 times [2024-06-21 20:43:49,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:49,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551892832] [2024-06-21 20:43:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:49,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:50,616 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 20:43:50,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551892832] [2024-06-21 20:43:50,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551892832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:50,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:50,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:50,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931872756] [2024-06-21 20:43:50,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:50,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:50,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:50,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:50,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:50,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:50,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 180 transitions, 1752 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:50,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:50,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:50,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:51,487 INFO L124 PetriNetUnfolderBase]: 2205/3402 cut-off events. [2024-06-21 20:43:51,487 INFO L125 PetriNetUnfolderBase]: For 139739/139739 co-relation queries the response was YES. [2024-06-21 20:43:51,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23283 conditions, 3402 events. 2205/3402 cut-off events. For 139739/139739 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17367 event pairs, 593 based on Foata normal form. 4/3404 useless extension candidates. Maximal degree in co-relation 23221. Up to 2996 conditions per place. [2024-06-21 20:43:51,511 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 147 selfloop transitions, 66 changer transitions 0/218 dead transitions. [2024-06-21 20:43:51,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 218 transitions, 2357 flow [2024-06-21 20:43:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:43:51,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:43:51,512 INFO L175 Difference]: Start difference. First operand has 141 places, 180 transitions, 1752 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:43:51,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 218 transitions, 2357 flow [2024-06-21 20:43:51,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 218 transitions, 2178 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:51,594 INFO L231 Difference]: Finished difference. Result has 145 places, 186 transitions, 1807 flow [2024-06-21 20:43:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1807, PETRI_PLACES=145, PETRI_TRANSITIONS=186} [2024-06-21 20:43:51,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-21 20:43:51,595 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 186 transitions, 1807 flow [2024-06-21 20:43:51,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:51,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:51,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:51,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:43:51,595 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:51,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1889873809, now seen corresponding path program 3 times [2024-06-21 20:43:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:51,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202618686] [2024-06-21 20:43:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:51,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:52,593 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 20:43:52,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:52,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202618686] [2024-06-21 20:43:52,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202618686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:52,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:52,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:52,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43709228] [2024-06-21 20:43:52,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:52,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:52,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:52,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:52,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:52,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:52,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 186 transitions, 1807 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:52,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:52,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:52,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:53,586 INFO L124 PetriNetUnfolderBase]: 2222/3436 cut-off events. [2024-06-21 20:43:53,587 INFO L125 PetriNetUnfolderBase]: For 148996/148996 co-relation queries the response was YES. [2024-06-21 20:43:53,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23965 conditions, 3436 events. 2222/3436 cut-off events. For 148996/148996 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17639 event pairs, 600 based on Foata normal form. 4/3438 useless extension candidates. Maximal degree in co-relation 23901. Up to 3023 conditions per place. [2024-06-21 20:43:53,608 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 68 changer transitions 0/223 dead transitions. [2024-06-21 20:43:53,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 223 transitions, 2421 flow [2024-06-21 20:43:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:43:53,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:43:53,609 INFO L175 Difference]: Start difference. First operand has 145 places, 186 transitions, 1807 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:43:53,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 223 transitions, 2421 flow [2024-06-21 20:43:53,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 223 transitions, 2246 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:53,697 INFO L231 Difference]: Finished difference. Result has 148 places, 190 transitions, 1847 flow [2024-06-21 20:43:53,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1847, PETRI_PLACES=148, PETRI_TRANSITIONS=190} [2024-06-21 20:43:53,698 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-21 20:43:53,698 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 190 transitions, 1847 flow [2024-06-21 20:43:53,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:53,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:53,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:53,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:43:53,699 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:53,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:53,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1890142579, now seen corresponding path program 4 times [2024-06-21 20:43:53,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:53,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909493787] [2024-06-21 20:43:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:53,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:54,640 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 20:43:54,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909493787] [2024-06-21 20:43:54,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909493787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:54,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:54,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:54,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162006566] [2024-06-21 20:43:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:54,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:54,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:54,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 190 transitions, 1847 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:54,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:54,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:54,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:55,543 INFO L124 PetriNetUnfolderBase]: 2239/3458 cut-off events. [2024-06-21 20:43:55,543 INFO L125 PetriNetUnfolderBase]: For 157775/157775 co-relation queries the response was YES. [2024-06-21 20:43:55,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24447 conditions, 3458 events. 2239/3458 cut-off events. For 157775/157775 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17705 event pairs, 586 based on Foata normal form. 4/3460 useless extension candidates. Maximal degree in co-relation 24382. Up to 2926 conditions per place. [2024-06-21 20:43:55,569 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 145 selfloop transitions, 76 changer transitions 0/226 dead transitions. [2024-06-21 20:43:55,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 226 transitions, 2453 flow [2024-06-21 20:43:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:43:55,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:43:55,571 INFO L175 Difference]: Start difference. First operand has 148 places, 190 transitions, 1847 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:43:55,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 226 transitions, 2453 flow [2024-06-21 20:43:55,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 226 transitions, 2300 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:55,694 INFO L231 Difference]: Finished difference. Result has 152 places, 192 transitions, 1911 flow [2024-06-21 20:43:55,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1911, PETRI_PLACES=152, PETRI_TRANSITIONS=192} [2024-06-21 20:43:55,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 20:43:55,695 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 192 transitions, 1911 flow [2024-06-21 20:43:55,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:43:55,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:55,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:55,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:43:55,695 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:55,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash -390517497, now seen corresponding path program 1 times [2024-06-21 20:43:55,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:55,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086001707] [2024-06-21 20:43:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:55,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:56,412 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 20:43:56,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:56,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086001707] [2024-06-21 20:43:56,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086001707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:56,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:56,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204913998] [2024-06-21 20:43:56,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:56,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:56,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:56,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:56,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:56,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 192 transitions, 1911 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:56,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:56,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:56,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:57,054 INFO L124 PetriNetUnfolderBase]: 2098/3296 cut-off events. [2024-06-21 20:43:57,054 INFO L125 PetriNetUnfolderBase]: For 164315/164315 co-relation queries the response was YES. [2024-06-21 20:43:57,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24299 conditions, 3296 events. 2098/3296 cut-off events. For 164315/164315 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17292 event pairs, 584 based on Foata normal form. 1/3282 useless extension candidates. Maximal degree in co-relation 24233. Up to 3072 conditions per place. [2024-06-21 20:43:57,084 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 183 selfloop transitions, 22 changer transitions 0/216 dead transitions. [2024-06-21 20:43:57,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 216 transitions, 2433 flow [2024-06-21 20:43:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:43:57,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:43:57,086 INFO L175 Difference]: Start difference. First operand has 152 places, 192 transitions, 1911 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:43:57,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 216 transitions, 2433 flow [2024-06-21 20:43:57,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 216 transitions, 2238 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:57,186 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 1818 flow [2024-06-21 20:43:57,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1818, PETRI_PLACES=152, PETRI_TRANSITIONS=195} [2024-06-21 20:43:57,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 20:43:57,187 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 1818 flow [2024-06-21 20:43:57,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:57,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:57,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:57,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:43:57,187 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:57,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:57,188 INFO L85 PathProgramCache]: Analyzing trace with hash -390159447, now seen corresponding path program 2 times [2024-06-21 20:43:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:57,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047911775] [2024-06-21 20:43:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:57,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:57,921 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 20:43:57,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:57,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047911775] [2024-06-21 20:43:57,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047911775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:57,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:57,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022998747] [2024-06-21 20:43:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:57,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:57,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 195 transitions, 1818 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:57,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:57,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:57,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:58,574 INFO L124 PetriNetUnfolderBase]: 2103/3303 cut-off events. [2024-06-21 20:43:58,575 INFO L125 PetriNetUnfolderBase]: For 172051/172051 co-relation queries the response was YES. [2024-06-21 20:43:58,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24559 conditions, 3303 events. 2103/3303 cut-off events. For 172051/172051 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17280 event pairs, 579 based on Foata normal form. 1/3289 useless extension candidates. Maximal degree in co-relation 24492. Up to 3069 conditions per place. [2024-06-21 20:43:58,604 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 179 selfloop transitions, 24 changer transitions 0/214 dead transitions. [2024-06-21 20:43:58,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 214 transitions, 2326 flow [2024-06-21 20:43:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:43:58,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:43:58,605 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 1818 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:43:58,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 214 transitions, 2326 flow [2024-06-21 20:43:58,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 214 transitions, 2246 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:58,690 INFO L231 Difference]: Finished difference. Result has 154 places, 198 transitions, 1850 flow [2024-06-21 20:43:58,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1850, PETRI_PLACES=154, PETRI_TRANSITIONS=198} [2024-06-21 20:43:58,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-21 20:43:58,691 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 198 transitions, 1850 flow [2024-06-21 20:43:58,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:58,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:58,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:58,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:43:58,691 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:58,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash -855482693, now seen corresponding path program 1 times [2024-06-21 20:43:58,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:58,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315547930] [2024-06-21 20:43:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:58,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:59,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:59,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315547930] [2024-06-21 20:43:59,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315547930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:59,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:59,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:59,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380454483] [2024-06-21 20:43:59,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:59,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:59,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:59,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:43:59,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 198 transitions, 1850 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:43:59,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:59,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:43:59,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:00,291 INFO L124 PetriNetUnfolderBase]: 2011/3213 cut-off events. [2024-06-21 20:44:00,291 INFO L125 PetriNetUnfolderBase]: For 177594/177594 co-relation queries the response was YES. [2024-06-21 20:44:00,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24337 conditions, 3213 events. 2011/3213 cut-off events. For 177594/177594 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17186 event pairs, 578 based on Foata normal form. 1/3199 useless extension candidates. Maximal degree in co-relation 24269. Up to 2880 conditions per place. [2024-06-21 20:44:00,315 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 169 selfloop transitions, 22 changer transitions 0/216 dead transitions. [2024-06-21 20:44:00,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 216 transitions, 2322 flow [2024-06-21 20:44:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:44:00,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:44:00,316 INFO L175 Difference]: Start difference. First operand has 154 places, 198 transitions, 1850 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:44:00,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 216 transitions, 2322 flow [2024-06-21 20:44:00,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 216 transitions, 2232 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:00,379 INFO L231 Difference]: Finished difference. Result has 156 places, 201 transitions, 1860 flow [2024-06-21 20:44:00,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1860, PETRI_PLACES=156, PETRI_TRANSITIONS=201} [2024-06-21 20:44:00,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-21 20:44:00,380 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 201 transitions, 1860 flow [2024-06-21 20:44:00,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:00,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:00,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:44:00,381 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:00,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash 740965835, now seen corresponding path program 5 times [2024-06-21 20:44:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346982693] [2024-06-21 20:44:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:01,461 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 20:44:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346982693] [2024-06-21 20:44:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346982693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:01,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:01,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408809476] [2024-06-21 20:44:01,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:01,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:01,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 201 transitions, 1860 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:01,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:01,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:01,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:02,524 INFO L124 PetriNetUnfolderBase]: 2282/3526 cut-off events. [2024-06-21 20:44:02,524 INFO L125 PetriNetUnfolderBase]: For 190369/190371 co-relation queries the response was YES. [2024-06-21 20:44:02,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26480 conditions, 3526 events. 2282/3526 cut-off events. For 190369/190371 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18087 event pairs, 598 based on Foata normal form. 6/3531 useless extension candidates. Maximal degree in co-relation 26411. Up to 3110 conditions per place. [2024-06-21 20:44:02,551 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 162 selfloop transitions, 72 changer transitions 0/239 dead transitions. [2024-06-21 20:44:02,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 239 transitions, 2529 flow [2024-06-21 20:44:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:44:02,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:44:02,552 INFO L175 Difference]: Start difference. First operand has 156 places, 201 transitions, 1860 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:44:02,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 239 transitions, 2529 flow [2024-06-21 20:44:02,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 239 transitions, 2451 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:02,644 INFO L231 Difference]: Finished difference. Result has 161 places, 209 transitions, 2068 flow [2024-06-21 20:44:02,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2068, PETRI_PLACES=161, PETRI_TRANSITIONS=209} [2024-06-21 20:44:02,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-21 20:44:02,644 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 209 transitions, 2068 flow [2024-06-21 20:44:02,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:02,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:02,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:44:02,645 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:02,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash -96261501, now seen corresponding path program 6 times [2024-06-21 20:44:02,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:02,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170857316] [2024-06-21 20:44:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:02,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:03,614 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 20:44:03,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:03,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170857316] [2024-06-21 20:44:03,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170857316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:03,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:03,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:03,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645408246] [2024-06-21 20:44:03,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:03,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:03,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:03,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:03,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:03,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:03,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 209 transitions, 2068 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:03,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:03,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:03,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:04,492 INFO L124 PetriNetUnfolderBase]: 2299/3553 cut-off events. [2024-06-21 20:44:04,493 INFO L125 PetriNetUnfolderBase]: For 202274/202276 co-relation queries the response was YES. [2024-06-21 20:44:04,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27537 conditions, 3553 events. 2299/3553 cut-off events. For 202274/202276 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18272 event pairs, 598 based on Foata normal form. 6/3558 useless extension candidates. Maximal degree in co-relation 27466. Up to 3093 conditions per place. [2024-06-21 20:44:04,521 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 164 selfloop transitions, 74 changer transitions 0/243 dead transitions. [2024-06-21 20:44:04,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 243 transitions, 2712 flow [2024-06-21 20:44:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:44:04,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:44:04,523 INFO L175 Difference]: Start difference. First operand has 161 places, 209 transitions, 2068 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:44:04,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 243 transitions, 2712 flow [2024-06-21 20:44:04,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 243 transitions, 2577 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:44:04,645 INFO L231 Difference]: Finished difference. Result has 166 places, 211 transitions, 2156 flow [2024-06-21 20:44:04,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2156, PETRI_PLACES=166, PETRI_TRANSITIONS=211} [2024-06-21 20:44:04,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-21 20:44:04,645 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 211 transitions, 2156 flow [2024-06-21 20:44:04,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:04,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:04,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:04,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:44:04,646 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:04,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash 227290327, now seen corresponding path program 7 times [2024-06-21 20:44:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:04,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844021114] [2024-06-21 20:44:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:04,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:05,664 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 20:44:05,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:05,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844021114] [2024-06-21 20:44:05,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844021114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:05,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:05,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835944387] [2024-06-21 20:44:05,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:05,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:05,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:05,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:05,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 211 transitions, 2156 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:05,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:05,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:05,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:06,506 INFO L124 PetriNetUnfolderBase]: 2316/3580 cut-off events. [2024-06-21 20:44:06,506 INFO L125 PetriNetUnfolderBase]: For 211987/211989 co-relation queries the response was YES. [2024-06-21 20:44:06,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27747 conditions, 3580 events. 2316/3580 cut-off events. For 211987/211989 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 18518 event pairs, 539 based on Foata normal form. 6/3585 useless extension candidates. Maximal degree in co-relation 27675. Up to 2859 conditions per place. [2024-06-21 20:44:06,538 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 152 selfloop transitions, 92 changer transitions 0/249 dead transitions. [2024-06-21 20:44:06,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 249 transitions, 3030 flow [2024-06-21 20:44:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:44:06,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:44:06,539 INFO L175 Difference]: Start difference. First operand has 166 places, 211 transitions, 2156 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:44:06,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 249 transitions, 3030 flow [2024-06-21 20:44:06,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 249 transitions, 2825 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:06,666 INFO L231 Difference]: Finished difference. Result has 168 places, 215 transitions, 2282 flow [2024-06-21 20:44:06,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2282, PETRI_PLACES=168, PETRI_TRANSITIONS=215} [2024-06-21 20:44:06,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-21 20:44:06,667 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 215 transitions, 2282 flow [2024-06-21 20:44:06,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:06,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:06,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:06,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:44:06,668 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:06,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash -345880941, now seen corresponding path program 8 times [2024-06-21 20:44:06,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:06,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173859831] [2024-06-21 20:44:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:06,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:07,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173859831] [2024-06-21 20:44:07,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173859831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:07,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:07,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:07,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237546965] [2024-06-21 20:44:07,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:07,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:07,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:07,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:07,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:07,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 215 transitions, 2282 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:07,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:07,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:07,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:08,727 INFO L124 PetriNetUnfolderBase]: 2344/3626 cut-off events. [2024-06-21 20:44:08,727 INFO L125 PetriNetUnfolderBase]: For 223301/223303 co-relation queries the response was YES. [2024-06-21 20:44:08,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28431 conditions, 3626 events. 2344/3626 cut-off events. For 223301/223303 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18746 event pairs, 611 based on Foata normal form. 6/3631 useless extension candidates. Maximal degree in co-relation 28358. Up to 3203 conditions per place. [2024-06-21 20:44:08,758 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 176 selfloop transitions, 70 changer transitions 0/251 dead transitions. [2024-06-21 20:44:08,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 251 transitions, 2978 flow [2024-06-21 20:44:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:44:08,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:44:08,759 INFO L175 Difference]: Start difference. First operand has 168 places, 215 transitions, 2282 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:44:08,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 251 transitions, 2978 flow [2024-06-21 20:44:08,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 251 transitions, 2807 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:08,902 INFO L231 Difference]: Finished difference. Result has 172 places, 220 transitions, 2364 flow [2024-06-21 20:44:08,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2364, PETRI_PLACES=172, PETRI_TRANSITIONS=220} [2024-06-21 20:44:08,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-21 20:44:08,903 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 220 transitions, 2364 flow [2024-06-21 20:44:08,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:08,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:08,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:08,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:44:08,903 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:08,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:08,903 INFO L85 PathProgramCache]: Analyzing trace with hash -345612171, now seen corresponding path program 9 times [2024-06-21 20:44:08,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:08,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070622839] [2024-06-21 20:44:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:08,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:09,961 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 20:44:09,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:09,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070622839] [2024-06-21 20:44:09,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070622839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:09,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:09,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:09,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555721497] [2024-06-21 20:44:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:09,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:10,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:10,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 220 transitions, 2364 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:10,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:10,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:10,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:10,907 INFO L124 PetriNetUnfolderBase]: 2361/3653 cut-off events. [2024-06-21 20:44:10,907 INFO L125 PetriNetUnfolderBase]: For 232372/232374 co-relation queries the response was YES. [2024-06-21 20:44:10,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28869 conditions, 3653 events. 2361/3653 cut-off events. For 232372/232374 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18915 event pairs, 606 based on Foata normal form. 6/3658 useless extension candidates. Maximal degree in co-relation 28794. Up to 3162 conditions per place. [2024-06-21 20:44:10,942 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 177 selfloop transitions, 74 changer transitions 0/256 dead transitions. [2024-06-21 20:44:10,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 256 transitions, 3194 flow [2024-06-21 20:44:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:44:10,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:44:10,943 INFO L175 Difference]: Start difference. First operand has 172 places, 220 transitions, 2364 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:44:10,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 256 transitions, 3194 flow [2024-06-21 20:44:11,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 256 transitions, 2988 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:11,085 INFO L231 Difference]: Finished difference. Result has 175 places, 222 transitions, 2379 flow [2024-06-21 20:44:11,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2379, PETRI_PLACES=175, PETRI_TRANSITIONS=222} [2024-06-21 20:44:11,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-21 20:44:11,085 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 222 transitions, 2379 flow [2024-06-21 20:44:11,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:11,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:11,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:44:11,086 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:11,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:11,086 INFO L85 PathProgramCache]: Analyzing trace with hash 171695917, now seen corresponding path program 10 times [2024-06-21 20:44:11,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:11,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303350093] [2024-06-21 20:44:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:11,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:12,019 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 20:44:12,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303350093] [2024-06-21 20:44:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303350093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:12,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:12,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:12,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142237520] [2024-06-21 20:44:12,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:12,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:12,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:12,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:12,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 222 transitions, 2379 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:12,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:12,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:12,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:12,969 INFO L124 PetriNetUnfolderBase]: 2353/3634 cut-off events. [2024-06-21 20:44:12,969 INFO L125 PetriNetUnfolderBase]: For 237816/237818 co-relation queries the response was YES. [2024-06-21 20:44:12,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28685 conditions, 3634 events. 2353/3634 cut-off events. For 237816/237818 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18731 event pairs, 607 based on Foata normal form. 6/3639 useless extension candidates. Maximal degree in co-relation 28610. Up to 3218 conditions per place. [2024-06-21 20:44:13,008 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 173 selfloop transitions, 73 changer transitions 0/251 dead transitions. [2024-06-21 20:44:13,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 251 transitions, 2963 flow [2024-06-21 20:44:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:44:13,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:44:13,010 INFO L175 Difference]: Start difference. First operand has 175 places, 222 transitions, 2379 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:44:13,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 251 transitions, 2963 flow [2024-06-21 20:44:13,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 251 transitions, 2678 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:13,214 INFO L231 Difference]: Finished difference. Result has 177 places, 222 transitions, 2247 flow [2024-06-21 20:44:13,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2247, PETRI_PLACES=177, PETRI_TRANSITIONS=222} [2024-06-21 20:44:13,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-21 20:44:13,214 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 222 transitions, 2247 flow [2024-06-21 20:44:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:44:13,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:13,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:13,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:44:13,215 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:13,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash 23147433, now seen corresponding path program 3 times [2024-06-21 20:44:13,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:13,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447024099] [2024-06-21 20:44:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:13,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:14,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:14,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447024099] [2024-06-21 20:44:14,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447024099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:14,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:14,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801452448] [2024-06-21 20:44:14,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:14,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:14,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:14,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:14,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:14,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 222 transitions, 2247 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:14,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:14,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:14,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:14,679 INFO L124 PetriNetUnfolderBase]: 2204/3474 cut-off events. [2024-06-21 20:44:14,680 INFO L125 PetriNetUnfolderBase]: For 242140/242144 co-relation queries the response was YES. [2024-06-21 20:44:14,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27908 conditions, 3474 events. 2204/3474 cut-off events. For 242140/242144 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18410 event pairs, 602 based on Foata normal form. 5/3473 useless extension candidates. Maximal degree in co-relation 27832. Up to 3218 conditions per place. [2024-06-21 20:44:14,715 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 195 selfloop transitions, 30 changer transitions 0/236 dead transitions. [2024-06-21 20:44:14,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 236 transitions, 2797 flow [2024-06-21 20:44:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:44:14,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 20:44:14,716 INFO L175 Difference]: Start difference. First operand has 177 places, 222 transitions, 2247 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:44:14,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 236 transitions, 2797 flow [2024-06-21 20:44:14,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 236 transitions, 2605 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 20:44:14,880 INFO L231 Difference]: Finished difference. Result has 175 places, 225 transitions, 2193 flow [2024-06-21 20:44:14,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2193, PETRI_PLACES=175, PETRI_TRANSITIONS=225} [2024-06-21 20:44:14,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-21 20:44:14,881 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 225 transitions, 2193 flow [2024-06-21 20:44:14,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:14,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:14,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:14,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:44:14,881 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:14,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:14,882 INFO L85 PathProgramCache]: Analyzing trace with hash 23147867, now seen corresponding path program 2 times [2024-06-21 20:44:14,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:14,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524192963] [2024-06-21 20:44:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524192963] [2024-06-21 20:44:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524192963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:15,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:15,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:15,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898769136] [2024-06-21 20:44:15,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:15,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:15,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:15,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:15,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:16,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:44:16,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 225 transitions, 2193 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:16,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:16,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:44:16,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:16,648 INFO L124 PetriNetUnfolderBase]: 2103/3374 cut-off events. [2024-06-21 20:44:16,648 INFO L125 PetriNetUnfolderBase]: For 248553/248557 co-relation queries the response was YES. [2024-06-21 20:44:16,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27181 conditions, 3374 events. 2103/3374 cut-off events. For 248553/248557 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18340 event pairs, 596 based on Foata normal form. 5/3373 useless extension candidates. Maximal degree in co-relation 27105. Up to 2978 conditions per place. [2024-06-21 20:44:16,685 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 177 selfloop transitions, 26 changer transitions 0/238 dead transitions. [2024-06-21 20:44:16,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 2681 flow [2024-06-21 20:44:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:44:16,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:44:16,686 INFO L175 Difference]: Start difference. First operand has 175 places, 225 transitions, 2193 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:44:16,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 2681 flow [2024-06-21 20:44:16,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 238 transitions, 2565 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:16,861 INFO L231 Difference]: Finished difference. Result has 177 places, 228 transitions, 2193 flow [2024-06-21 20:44:16,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2193, PETRI_PLACES=177, PETRI_TRANSITIONS=228} [2024-06-21 20:44:16,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-21 20:44:16,862 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 228 transitions, 2193 flow [2024-06-21 20:44:16,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:16,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:16,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:44:16,863 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:16,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash 23623097, now seen corresponding path program 3 times [2024-06-21 20:44:16,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683802568] [2024-06-21 20:44:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:16,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:17,802 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 20:44:17,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:17,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683802568] [2024-06-21 20:44:17,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683802568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:17,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:17,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:17,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827664042] [2024-06-21 20:44:17,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:17,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:17,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:17,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:17,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:17,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:44:17,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 228 transitions, 2193 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:17,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:17,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:44:17,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:18,431 INFO L124 PetriNetUnfolderBase]: 2100/3370 cut-off events. [2024-06-21 20:44:18,431 INFO L125 PetriNetUnfolderBase]: For 257043/257047 co-relation queries the response was YES. [2024-06-21 20:44:18,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27559 conditions, 3370 events. 2100/3370 cut-off events. For 257043/257047 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18341 event pairs, 596 based on Foata normal form. 5/3369 useless extension candidates. Maximal degree in co-relation 27482. Up to 2965 conditions per place. [2024-06-21 20:44:18,457 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 175 selfloop transitions, 34 changer transitions 0/244 dead transitions. [2024-06-21 20:44:18,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 244 transitions, 2713 flow [2024-06-21 20:44:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:44:18,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:44:18,459 INFO L175 Difference]: Start difference. First operand has 177 places, 228 transitions, 2193 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:44:18,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 244 transitions, 2713 flow [2024-06-21 20:44:18,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 244 transitions, 2619 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:18,588 INFO L231 Difference]: Finished difference. Result has 180 places, 234 transitions, 2267 flow [2024-06-21 20:44:18,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2267, PETRI_PLACES=180, PETRI_TRANSITIONS=234} [2024-06-21 20:44:18,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-21 20:44:18,589 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 234 transitions, 2267 flow [2024-06-21 20:44:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:18,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:18,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:18,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:44:18,589 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:18,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash -153857793, now seen corresponding path program 1 times [2024-06-21 20:44:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:18,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369760282] [2024-06-21 20:44:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:18,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:19,376 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 20:44:19,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369760282] [2024-06-21 20:44:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369760282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:19,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:19,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:19,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6028399] [2024-06-21 20:44:19,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:19,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:44:19,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 234 transitions, 2267 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:19,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:19,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:44:19,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:20,113 INFO L124 PetriNetUnfolderBase]: 2112/3391 cut-off events. [2024-06-21 20:44:20,113 INFO L125 PetriNetUnfolderBase]: For 266100/266100 co-relation queries the response was YES. [2024-06-21 20:44:20,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27894 conditions, 3391 events. 2112/3391 cut-off events. For 266100/266100 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18372 event pairs, 559 based on Foata normal form. 1/3391 useless extension candidates. Maximal degree in co-relation 27815. Up to 2960 conditions per place. [2024-06-21 20:44:20,143 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 203 selfloop transitions, 15 changer transitions 0/252 dead transitions. [2024-06-21 20:44:20,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 252 transitions, 2799 flow [2024-06-21 20:44:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:44:20,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:44:20,145 INFO L175 Difference]: Start difference. First operand has 180 places, 234 transitions, 2267 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:44:20,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 252 transitions, 2799 flow [2024-06-21 20:44:20,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 252 transitions, 2720 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:44:20,336 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 2282 flow [2024-06-21 20:44:20,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2282, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2024-06-21 20:44:20,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-21 20:44:20,337 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 2282 flow [2024-06-21 20:44:20,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:20,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:20,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:44:20,337 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:20,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -153737637, now seen corresponding path program 1 times [2024-06-21 20:44:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:20,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60785504] [2024-06-21 20:44:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:21,181 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 20:44:21,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:21,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60785504] [2024-06-21 20:44:21,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60785504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:21,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:21,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:21,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070629934] [2024-06-21 20:44:21,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:21,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:21,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:21,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:21,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:21,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:44:21,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 2282 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:21,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:21,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:44:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:21,886 INFO L124 PetriNetUnfolderBase]: 2122/3409 cut-off events. [2024-06-21 20:44:21,887 INFO L125 PetriNetUnfolderBase]: For 279573/279573 co-relation queries the response was YES. [2024-06-21 20:44:21,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28481 conditions, 3409 events. 2122/3409 cut-off events. For 279573/279573 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18475 event pairs, 558 based on Foata normal form. 4/3412 useless extension candidates. Maximal degree in co-relation 28400. Up to 2974 conditions per place. [2024-06-21 20:44:21,918 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 204 selfloop transitions, 16 changer transitions 0/254 dead transitions. [2024-06-21 20:44:21,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 2810 flow [2024-06-21 20:44:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:44:21,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:44:21,920 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 2282 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:44:21,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 2810 flow [2024-06-21 20:44:22,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 254 transitions, 2738 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:22,164 INFO L231 Difference]: Finished difference. Result has 186 places, 241 transitions, 2305 flow [2024-06-21 20:44:22,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2305, PETRI_PLACES=186, PETRI_TRANSITIONS=241} [2024-06-21 20:44:22,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-21 20:44:22,165 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 241 transitions, 2305 flow [2024-06-21 20:44:22,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:22,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:22,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:44:22,166 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:22,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash -841189957, now seen corresponding path program 2 times [2024-06-21 20:44:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:22,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254855958] [2024-06-21 20:44:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:22,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:23,144 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 20:44:23,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:23,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254855958] [2024-06-21 20:44:23,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254855958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:23,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:23,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:23,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363133973] [2024-06-21 20:44:23,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:23,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:23,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:23,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:23,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:23,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:44:23,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 241 transitions, 2305 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:23,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:23,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:44:23,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:23,807 INFO L124 PetriNetUnfolderBase]: 2148/3452 cut-off events. [2024-06-21 20:44:23,807 INFO L125 PetriNetUnfolderBase]: For 294485/294487 co-relation queries the response was YES. [2024-06-21 20:44:23,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29521 conditions, 3452 events. 2148/3452 cut-off events. For 294485/294487 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18803 event pairs, 559 based on Foata normal form. 5/3456 useless extension candidates. Maximal degree in co-relation 29439. Up to 2965 conditions per place. [2024-06-21 20:44:23,840 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 197 selfloop transitions, 31 changer transitions 0/262 dead transitions. [2024-06-21 20:44:23,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 262 transitions, 3021 flow [2024-06-21 20:44:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:44:23,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 20:44:23,842 INFO L175 Difference]: Start difference. First operand has 186 places, 241 transitions, 2305 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:44:23,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 262 transitions, 3021 flow [2024-06-21 20:44:24,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 262 transitions, 2954 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:24,055 INFO L231 Difference]: Finished difference. Result has 189 places, 249 transitions, 2449 flow [2024-06-21 20:44:24,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2238, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2449, PETRI_PLACES=189, PETRI_TRANSITIONS=249} [2024-06-21 20:44:24,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-21 20:44:24,055 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 249 transitions, 2449 flow [2024-06-21 20:44:24,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:24,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:24,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:24,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:44:24,056 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:24,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash -841427107, now seen corresponding path program 3 times [2024-06-21 20:44:24,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:24,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829243706] [2024-06-21 20:44:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:24,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:24,958 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 20:44:24,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:24,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829243706] [2024-06-21 20:44:24,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829243706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:24,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:24,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:24,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209007237] [2024-06-21 20:44:24,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:25,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:44:25,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 249 transitions, 2449 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:25,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:25,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:44:25,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:25,692 INFO L124 PetriNetUnfolderBase]: 2141/3441 cut-off events. [2024-06-21 20:44:25,692 INFO L125 PetriNetUnfolderBase]: For 305059/305061 co-relation queries the response was YES. [2024-06-21 20:44:25,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30255 conditions, 3441 events. 2141/3441 cut-off events. For 305059/305061 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18621 event pairs, 561 based on Foata normal form. 6/3446 useless extension candidates. Maximal degree in co-relation 30171. Up to 2998 conditions per place. [2024-06-21 20:44:25,728 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 209 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2024-06-21 20:44:25,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 264 transitions, 3022 flow [2024-06-21 20:44:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:44:25,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:44:25,730 INFO L175 Difference]: Start difference. First operand has 189 places, 249 transitions, 2449 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:44:25,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 264 transitions, 3022 flow [2024-06-21 20:44:26,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 264 transitions, 2961 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 20:44:26,017 INFO L231 Difference]: Finished difference. Result has 193 places, 253 transitions, 2510 flow [2024-06-21 20:44:26,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2510, PETRI_PLACES=193, PETRI_TRANSITIONS=253} [2024-06-21 20:44:26,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-21 20:44:26,018 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 253 transitions, 2510 flow [2024-06-21 20:44:26,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 20:44:26,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:26,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:26,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:44:26,018 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:26,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:26,019 INFO L85 PathProgramCache]: Analyzing trace with hash -841181029, now seen corresponding path program 1 times [2024-06-21 20:44:26,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:26,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103372990] [2024-06-21 20:44:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:26,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:27,240 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 20:44:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103372990] [2024-06-21 20:44:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103372990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:27,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:27,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130748494] [2024-06-21 20:44:27,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:27,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:27,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:44:27,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 253 transitions, 2510 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:27,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:27,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:44:27,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:28,032 INFO L124 PetriNetUnfolderBase]: 2136/3423 cut-off events. [2024-06-21 20:44:28,032 INFO L125 PetriNetUnfolderBase]: For 308328/308330 co-relation queries the response was YES. [2024-06-21 20:44:28,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30721 conditions, 3423 events. 2136/3423 cut-off events. For 308328/308330 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18618 event pairs, 599 based on Foata normal form. 3/3420 useless extension candidates. Maximal degree in co-relation 30635. Up to 3058 conditions per place. [2024-06-21 20:44:28,069 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 212 selfloop transitions, 18 changer transitions 0/265 dead transitions. [2024-06-21 20:44:28,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 265 transitions, 3026 flow [2024-06-21 20:44:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:44:28,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:44:28,070 INFO L175 Difference]: Start difference. First operand has 193 places, 253 transitions, 2510 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:44:28,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 265 transitions, 3026 flow [2024-06-21 20:44:28,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 265 transitions, 2953 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:28,320 INFO L231 Difference]: Finished difference. Result has 196 places, 255 transitions, 2513 flow [2024-06-21 20:44:28,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2513, PETRI_PLACES=196, PETRI_TRANSITIONS=255} [2024-06-21 20:44:28,321 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-21 20:44:28,321 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 255 transitions, 2513 flow [2024-06-21 20:44:28,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:28,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:28,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:28,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:44:28,321 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:28,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:28,321 INFO L85 PathProgramCache]: Analyzing trace with hash 897630992, now seen corresponding path program 1 times [2024-06-21 20:44:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:28,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511997113] [2024-06-21 20:44:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:28,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:29,352 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 20:44:29,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:29,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511997113] [2024-06-21 20:44:29,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511997113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:29,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:29,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:29,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020190348] [2024-06-21 20:44:29,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:29,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:29,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:29,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:29,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 255 transitions, 2513 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:29,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:29,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:29,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:30,624 INFO L124 PetriNetUnfolderBase]: 2562/3978 cut-off events. [2024-06-21 20:44:30,624 INFO L125 PetriNetUnfolderBase]: For 372081/372081 co-relation queries the response was YES. [2024-06-21 20:44:30,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35485 conditions, 3978 events. 2562/3978 cut-off events. For 372081/372081 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21223 event pairs, 508 based on Foata normal form. 16/3993 useless extension candidates. Maximal degree in co-relation 35398. Up to 3455 conditions per place. [2024-06-21 20:44:30,662 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 278 selfloop transitions, 32 changer transitions 0/315 dead transitions. [2024-06-21 20:44:30,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 315 transitions, 3655 flow [2024-06-21 20:44:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 20:44:30,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:44:30,664 INFO L175 Difference]: Start difference. First operand has 196 places, 255 transitions, 2513 flow. Second operand 11 states and 220 transitions. [2024-06-21 20:44:30,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 315 transitions, 3655 flow [2024-06-21 20:44:30,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 315 transitions, 3543 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:30,919 INFO L231 Difference]: Finished difference. Result has 200 places, 257 transitions, 2569 flow [2024-06-21 20:44:30,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2569, PETRI_PLACES=200, PETRI_TRANSITIONS=257} [2024-06-21 20:44:30,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 20:44:30,919 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 257 transitions, 2569 flow [2024-06-21 20:44:30,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:30,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:30,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:44:30,920 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:30,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1140813804, now seen corresponding path program 2 times [2024-06-21 20:44:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:30,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069259058] [2024-06-21 20:44:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:31,934 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 20:44:31,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:31,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069259058] [2024-06-21 20:44:31,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069259058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:31,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:31,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:31,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29605052] [2024-06-21 20:44:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:32,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:32,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 257 transitions, 2569 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:32,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:32,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:32,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:33,062 INFO L124 PetriNetUnfolderBase]: 2526/3923 cut-off events. [2024-06-21 20:44:33,062 INFO L125 PetriNetUnfolderBase]: For 364212/364212 co-relation queries the response was YES. [2024-06-21 20:44:33,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34502 conditions, 3923 events. 2526/3923 cut-off events. For 364212/364212 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 20773 event pairs, 612 based on Foata normal form. 20/3942 useless extension candidates. Maximal degree in co-relation 34415. Up to 3567 conditions per place. [2024-06-21 20:44:33,100 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 29 changer transitions 0/305 dead transitions. [2024-06-21 20:44:33,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 305 transitions, 3361 flow [2024-06-21 20:44:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 20:44:33,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 20:44:33,102 INFO L175 Difference]: Start difference. First operand has 200 places, 257 transitions, 2569 flow. Second operand 10 states and 198 transitions. [2024-06-21 20:44:33,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 305 transitions, 3361 flow [2024-06-21 20:44:33,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 305 transitions, 3259 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:33,458 INFO L231 Difference]: Finished difference. Result has 203 places, 257 transitions, 2532 flow [2024-06-21 20:44:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2532, PETRI_PLACES=203, PETRI_TRANSITIONS=257} [2024-06-21 20:44:33,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-21 20:44:33,458 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 257 transitions, 2532 flow [2024-06-21 20:44:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:33,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:33,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:33,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:44:33,459 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:33,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash -196476322, now seen corresponding path program 3 times [2024-06-21 20:44:33,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:33,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163096963] [2024-06-21 20:44:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:33,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:34,430 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 20:44:34,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:34,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163096963] [2024-06-21 20:44:34,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163096963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:34,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:34,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:34,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555086214] [2024-06-21 20:44:34,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:34,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:34,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:34,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:34,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 257 transitions, 2532 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:34,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:34,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:34,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:35,746 INFO L124 PetriNetUnfolderBase]: 2601/4048 cut-off events. [2024-06-21 20:44:35,747 INFO L125 PetriNetUnfolderBase]: For 380755/380755 co-relation queries the response was YES. [2024-06-21 20:44:35,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35215 conditions, 4048 events. 2601/4048 cut-off events. For 380755/380755 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21638 event pairs, 584 based on Foata normal form. 20/4066 useless extension candidates. Maximal degree in co-relation 35126. Up to 3279 conditions per place. [2024-06-21 20:44:35,782 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 190 selfloop transitions, 109 changer transitions 0/304 dead transitions. [2024-06-21 20:44:35,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 304 transitions, 3380 flow [2024-06-21 20:44:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 20:44:35,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-21 20:44:35,783 INFO L175 Difference]: Start difference. First operand has 203 places, 257 transitions, 2532 flow. Second operand 10 states and 206 transitions. [2024-06-21 20:44:35,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 304 transitions, 3380 flow [2024-06-21 20:44:35,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 304 transitions, 3317 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:44:35,981 INFO L231 Difference]: Finished difference. Result has 204 places, 258 transitions, 2746 flow [2024-06-21 20:44:35,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2746, PETRI_PLACES=204, PETRI_TRANSITIONS=258} [2024-06-21 20:44:35,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-21 20:44:35,982 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 258 transitions, 2746 flow [2024-06-21 20:44:35,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:35,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:35,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:35,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:44:35,982 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:35,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1015963820, now seen corresponding path program 1 times [2024-06-21 20:44:35,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:35,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228101706] [2024-06-21 20:44:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:35,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:37,137 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 20:44:37,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:37,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228101706] [2024-06-21 20:44:37,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228101706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:37,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:37,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477709932] [2024-06-21 20:44:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:37,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:37,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:37,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:37,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 258 transitions, 2746 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:37,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:37,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:37,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:38,394 INFO L124 PetriNetUnfolderBase]: 2763/4324 cut-off events. [2024-06-21 20:44:38,394 INFO L125 PetriNetUnfolderBase]: For 380151/380151 co-relation queries the response was YES. [2024-06-21 20:44:38,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37190 conditions, 4324 events. 2763/4324 cut-off events. For 380151/380151 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 23647 event pairs, 656 based on Foata normal form. 4/4326 useless extension candidates. Maximal degree in co-relation 37100. Up to 3625 conditions per place. [2024-06-21 20:44:38,439 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 208 selfloop transitions, 118 changer transitions 0/331 dead transitions. [2024-06-21 20:44:38,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 331 transitions, 3921 flow [2024-06-21 20:44:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 20:44:38,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 20:44:38,440 INFO L175 Difference]: Start difference. First operand has 204 places, 258 transitions, 2746 flow. Second operand 11 states and 210 transitions. [2024-06-21 20:44:38,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 331 transitions, 3921 flow [2024-06-21 20:44:38,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 331 transitions, 3618 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:38,792 INFO L231 Difference]: Finished difference. Result has 211 places, 292 transitions, 3145 flow [2024-06-21 20:44:38,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3145, PETRI_PLACES=211, PETRI_TRANSITIONS=292} [2024-06-21 20:44:38,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 20:44:38,792 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 292 transitions, 3145 flow [2024-06-21 20:44:38,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:38,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:38,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:38,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:44:38,793 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:38,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:38,793 INFO L85 PathProgramCache]: Analyzing trace with hash -442758900, now seen corresponding path program 4 times [2024-06-21 20:44:38,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:38,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874420001] [2024-06-21 20:44:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:38,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:39,762 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 20:44:39,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:39,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874420001] [2024-06-21 20:44:39,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874420001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:39,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:39,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:39,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602340319] [2024-06-21 20:44:39,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:39,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:39,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:39,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:39,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:39,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:39,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 292 transitions, 3145 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:39,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:39,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:39,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:41,184 INFO L124 PetriNetUnfolderBase]: 2838/4431 cut-off events. [2024-06-21 20:44:41,184 INFO L125 PetriNetUnfolderBase]: For 413182/413182 co-relation queries the response was YES. [2024-06-21 20:44:41,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38576 conditions, 4431 events. 2838/4431 cut-off events. For 413182/413182 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24249 event pairs, 594 based on Foata normal form. 20/4449 useless extension candidates. Maximal degree in co-relation 38481. Up to 3487 conditions per place. [2024-06-21 20:44:41,225 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 209 selfloop transitions, 123 changer transitions 0/337 dead transitions. [2024-06-21 20:44:41,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 337 transitions, 4077 flow [2024-06-21 20:44:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:44:41,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 20:44:41,226 INFO L175 Difference]: Start difference. First operand has 211 places, 292 transitions, 3145 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:44:41,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 337 transitions, 4077 flow [2024-06-21 20:44:41,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 337 transitions, 3887 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 20:44:41,477 INFO L231 Difference]: Finished difference. Result has 218 places, 293 transitions, 3266 flow [2024-06-21 20:44:41,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3266, PETRI_PLACES=218, PETRI_TRANSITIONS=293} [2024-06-21 20:44:41,478 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-21 20:44:41,478 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 293 transitions, 3266 flow [2024-06-21 20:44:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:41,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:41,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:41,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:44:41,478 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:41,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash -24396380, now seen corresponding path program 2 times [2024-06-21 20:44:41,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:41,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090507536] [2024-06-21 20:44:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:41,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:42,514 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 20:44:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:42,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090507536] [2024-06-21 20:44:42,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090507536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:42,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:42,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:42,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449731633] [2024-06-21 20:44:42,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:42,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:42,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:42,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:42,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 293 transitions, 3266 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:42,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:42,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:42,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:43,846 INFO L124 PetriNetUnfolderBase]: 2877/4520 cut-off events. [2024-06-21 20:44:43,846 INFO L125 PetriNetUnfolderBase]: For 410839/410839 co-relation queries the response was YES. [2024-06-21 20:44:43,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39288 conditions, 4520 events. 2877/4520 cut-off events. For 410839/410839 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25108 event pairs, 637 based on Foata normal form. 4/4522 useless extension candidates. Maximal degree in co-relation 39191. Up to 3796 conditions per place. [2024-06-21 20:44:43,895 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 128 changer transitions 0/344 dead transitions. [2024-06-21 20:44:43,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 344 transitions, 4254 flow [2024-06-21 20:44:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 20:44:43,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 20:44:43,897 INFO L175 Difference]: Start difference. First operand has 218 places, 293 transitions, 3266 flow. Second operand 10 states and 197 transitions. [2024-06-21 20:44:43,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 344 transitions, 4254 flow [2024-06-21 20:44:44,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 344 transitions, 3951 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:44,190 INFO L231 Difference]: Finished difference. Result has 221 places, 308 transitions, 3441 flow [2024-06-21 20:44:44,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3441, PETRI_PLACES=221, PETRI_TRANSITIONS=308} [2024-06-21 20:44:44,190 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 20:44:44,190 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 308 transitions, 3441 flow [2024-06-21 20:44:44,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:44,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:44,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:44,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:44:44,191 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:44,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:44,191 INFO L85 PathProgramCache]: Analyzing trace with hash -24157370, now seen corresponding path program 3 times [2024-06-21 20:44:44,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:44,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435661882] [2024-06-21 20:44:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:44,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:45,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:45,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435661882] [2024-06-21 20:44:45,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435661882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:45,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:45,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:45,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698418858] [2024-06-21 20:44:45,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:45,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:45,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:45,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:45,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 308 transitions, 3441 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:45,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:45,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:45,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:46,555 INFO L124 PetriNetUnfolderBase]: 2919/4571 cut-off events. [2024-06-21 20:44:46,555 INFO L125 PetriNetUnfolderBase]: For 428294/428294 co-relation queries the response was YES. [2024-06-21 20:44:46,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40228 conditions, 4571 events. 2919/4571 cut-off events. For 428294/428294 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25365 event pairs, 630 based on Foata normal form. 4/4573 useless extension candidates. Maximal degree in co-relation 40129. Up to 3764 conditions per place. [2024-06-21 20:44:46,599 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 212 selfloop transitions, 134 changer transitions 0/351 dead transitions. [2024-06-21 20:44:46,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 351 transitions, 4593 flow [2024-06-21 20:44:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 20:44:46,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:44:46,600 INFO L175 Difference]: Start difference. First operand has 221 places, 308 transitions, 3441 flow. Second operand 10 states and 200 transitions. [2024-06-21 20:44:46,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 351 transitions, 4593 flow [2024-06-21 20:44:47,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 351 transitions, 4316 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:47,058 INFO L231 Difference]: Finished difference. Result has 226 places, 312 transitions, 3577 flow [2024-06-21 20:44:47,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3577, PETRI_PLACES=226, PETRI_TRANSITIONS=312} [2024-06-21 20:44:47,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-21 20:44:47,059 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 312 transitions, 3577 flow [2024-06-21 20:44:47,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:47,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:47,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:47,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:44:47,060 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:47,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1181602954, now seen corresponding path program 4 times [2024-06-21 20:44:47,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:47,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081577579] [2024-06-21 20:44:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:47,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:48,196 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 20:44:48,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081577579] [2024-06-21 20:44:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081577579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:48,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458469337] [2024-06-21 20:44:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:48,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:48,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:48,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 312 transitions, 3577 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:48,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:48,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:48,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:49,608 INFO L124 PetriNetUnfolderBase]: 2936/4606 cut-off events. [2024-06-21 20:44:49,608 INFO L125 PetriNetUnfolderBase]: For 441023/441023 co-relation queries the response was YES. [2024-06-21 20:44:49,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40557 conditions, 4606 events. 2936/4606 cut-off events. For 441023/441023 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25624 event pairs, 689 based on Foata normal form. 4/4608 useless extension candidates. Maximal degree in co-relation 40457. Up to 3894 conditions per place. [2024-06-21 20:44:49,660 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 225 selfloop transitions, 123 changer transitions 0/353 dead transitions. [2024-06-21 20:44:49,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 353 transitions, 4522 flow [2024-06-21 20:44:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 20:44:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-21 20:44:49,661 INFO L175 Difference]: Start difference. First operand has 226 places, 312 transitions, 3577 flow. Second operand 11 states and 211 transitions. [2024-06-21 20:44:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 353 transitions, 4522 flow [2024-06-21 20:44:50,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 353 transitions, 4273 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:50,094 INFO L231 Difference]: Finished difference. Result has 233 places, 316 transitions, 3731 flow [2024-06-21 20:44:50,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3731, PETRI_PLACES=233, PETRI_TRANSITIONS=316} [2024-06-21 20:44:50,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-21 20:44:50,095 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 316 transitions, 3731 flow [2024-06-21 20:44:50,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:50,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:50,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:50,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:44:50,095 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:50,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash 784252244, now seen corresponding path program 1 times [2024-06-21 20:44:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:50,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402164113] [2024-06-21 20:44:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:50,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:50,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402164113] [2024-06-21 20:44:50,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402164113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:50,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:50,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:50,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160251240] [2024-06-21 20:44:50,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:50,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:50,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:50,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:50,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:50,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 316 transitions, 3731 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:50,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:50,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:50,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:51,743 INFO L124 PetriNetUnfolderBase]: 2802/4456 cut-off events. [2024-06-21 20:44:51,743 INFO L125 PetriNetUnfolderBase]: For 455818/455833 co-relation queries the response was YES. [2024-06-21 20:44:51,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40063 conditions, 4456 events. 2802/4456 cut-off events. For 455818/455833 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25377 event pairs, 633 based on Foata normal form. 17/4451 useless extension candidates. Maximal degree in co-relation 39959. Up to 4011 conditions per place. [2024-06-21 20:44:51,793 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 267 selfloop transitions, 37 changer transitions 0/339 dead transitions. [2024-06-21 20:44:51,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 339 transitions, 4483 flow [2024-06-21 20:44:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:44:51,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:44:51,794 INFO L175 Difference]: Start difference. First operand has 233 places, 316 transitions, 3731 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:44:51,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 339 transitions, 4483 flow [2024-06-21 20:44:52,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 339 transitions, 4249 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:52,153 INFO L231 Difference]: Finished difference. Result has 235 places, 319 transitions, 3654 flow [2024-06-21 20:44:52,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3654, PETRI_PLACES=235, PETRI_TRANSITIONS=319} [2024-06-21 20:44:52,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 20:44:52,154 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 319 transitions, 3654 flow [2024-06-21 20:44:52,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:52,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:52,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:44:52,155 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:52,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 789966164, now seen corresponding path program 2 times [2024-06-21 20:44:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599313969] [2024-06-21 20:44:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:52,908 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 20:44:52,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599313969] [2024-06-21 20:44:52,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599313969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:52,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:52,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:52,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774559587] [2024-06-21 20:44:52,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:52,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:52,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:52,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:52,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 319 transitions, 3654 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:52,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:52,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:52,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:53,845 INFO L124 PetriNetUnfolderBase]: 2832/4502 cut-off events. [2024-06-21 20:44:53,846 INFO L125 PetriNetUnfolderBase]: For 469243/469258 co-relation queries the response was YES. [2024-06-21 20:44:53,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40635 conditions, 4502 events. 2832/4502 cut-off events. For 469243/469258 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25728 event pairs, 640 based on Foata normal form. 17/4506 useless extension candidates. Maximal degree in co-relation 40530. Up to 4027 conditions per place. [2024-06-21 20:44:53,898 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 265 selfloop transitions, 43 changer transitions 0/343 dead transitions. [2024-06-21 20:44:53,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 343 transitions, 4618 flow [2024-06-21 20:44:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:44:53,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 20:44:53,899 INFO L175 Difference]: Start difference. First operand has 235 places, 319 transitions, 3654 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:44:53,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 343 transitions, 4618 flow [2024-06-21 20:44:54,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 343 transitions, 4511 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 20:44:54,327 INFO L231 Difference]: Finished difference. Result has 238 places, 325 transitions, 3793 flow [2024-06-21 20:44:54,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3793, PETRI_PLACES=238, PETRI_TRANSITIONS=325} [2024-06-21 20:44:54,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-21 20:44:54,327 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 325 transitions, 3793 flow [2024-06-21 20:44:54,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:54,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:54,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:44:54,328 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:54,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -559521998, now seen corresponding path program 5 times [2024-06-21 20:44:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72743794] [2024-06-21 20:44:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:55,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:55,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72743794] [2024-06-21 20:44:55,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72743794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:55,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:55,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:55,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22843991] [2024-06-21 20:44:55,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:55,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:55,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:55,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:55,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 325 transitions, 3793 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:55,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:55,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:55,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:56,721 INFO L124 PetriNetUnfolderBase]: 3047/4773 cut-off events. [2024-06-21 20:44:56,721 INFO L125 PetriNetUnfolderBase]: For 518718/518718 co-relation queries the response was YES. [2024-06-21 20:44:56,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43502 conditions, 4773 events. 3047/4773 cut-off events. For 518718/518718 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26705 event pairs, 599 based on Foata normal form. 20/4791 useless extension candidates. Maximal degree in co-relation 43396. Up to 3796 conditions per place. [2024-06-21 20:44:56,779 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 238 selfloop transitions, 126 changer transitions 0/369 dead transitions. [2024-06-21 20:44:56,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 369 transitions, 4797 flow [2024-06-21 20:44:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 20:44:56,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 20:44:56,780 INFO L175 Difference]: Start difference. First operand has 238 places, 325 transitions, 3793 flow. Second operand 10 states and 202 transitions. [2024-06-21 20:44:56,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 369 transitions, 4797 flow [2024-06-21 20:44:57,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 369 transitions, 4686 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 20:44:57,432 INFO L231 Difference]: Finished difference. Result has 245 places, 326 transitions, 4003 flow [2024-06-21 20:44:57,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4003, PETRI_PLACES=245, PETRI_TRANSITIONS=326} [2024-06-21 20:44:57,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-21 20:44:57,433 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 326 transitions, 4003 flow [2024-06-21 20:44:57,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:57,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:57,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:57,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:44:57,434 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:57,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:57,434 INFO L85 PathProgramCache]: Analyzing trace with hash -552850550, now seen corresponding path program 5 times [2024-06-21 20:44:57,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:57,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168430539] [2024-06-21 20:44:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:57,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:58,423 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 20:44:58,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:58,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168430539] [2024-06-21 20:44:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168430539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:58,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137820526] [2024-06-21 20:44:58,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:58,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:58,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:58,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:58,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 326 transitions, 4003 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:58,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:58,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:58,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:59,846 INFO L124 PetriNetUnfolderBase]: 3108/4894 cut-off events. [2024-06-21 20:44:59,846 INFO L125 PetriNetUnfolderBase]: For 513289/513289 co-relation queries the response was YES. [2024-06-21 20:44:59,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44821 conditions, 4894 events. 3108/4894 cut-off events. For 513289/513289 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27726 event pairs, 642 based on Foata normal form. 4/4896 useless extension candidates. Maximal degree in co-relation 44713. Up to 4139 conditions per place. [2024-06-21 20:44:59,899 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 238 selfloop transitions, 133 changer transitions 0/376 dead transitions. [2024-06-21 20:44:59,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 376 transitions, 5091 flow [2024-06-21 20:44:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 20:44:59,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 20:44:59,900 INFO L175 Difference]: Start difference. First operand has 245 places, 326 transitions, 4003 flow. Second operand 10 states and 197 transitions. [2024-06-21 20:44:59,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 376 transitions, 5091 flow [2024-06-21 20:45:00,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 376 transitions, 4774 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 20:45:00,402 INFO L231 Difference]: Finished difference. Result has 248 places, 341 transitions, 4216 flow [2024-06-21 20:45:00,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4216, PETRI_PLACES=248, PETRI_TRANSITIONS=341} [2024-06-21 20:45:00,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-21 20:45:00,402 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 341 transitions, 4216 flow [2024-06-21 20:45:00,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:00,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:00,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:00,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:45:00,403 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:00,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:00,403 INFO L85 PathProgramCache]: Analyzing trace with hash -552842180, now seen corresponding path program 6 times [2024-06-21 20:45:00,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:00,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510357557] [2024-06-21 20:45:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:00,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:01,376 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 20:45:01,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:01,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510357557] [2024-06-21 20:45:01,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510357557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:01,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:01,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:01,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960527425] [2024-06-21 20:45:01,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:01,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:01,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:01,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:01,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 341 transitions, 4216 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:01,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:01,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:01,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:02,793 INFO L124 PetriNetUnfolderBase]: 3150/4950 cut-off events. [2024-06-21 20:45:02,793 INFO L125 PetriNetUnfolderBase]: For 532492/532492 co-relation queries the response was YES. [2024-06-21 20:45:02,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45821 conditions, 4950 events. 3150/4950 cut-off events. For 532492/532492 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27987 event pairs, 644 based on Foata normal form. 4/4952 useless extension candidates. Maximal degree in co-relation 45711. Up to 4130 conditions per place. [2024-06-21 20:45:02,852 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 241 selfloop transitions, 137 changer transitions 0/383 dead transitions. [2024-06-21 20:45:02,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 383 transitions, 5472 flow [2024-06-21 20:45:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:45:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:45:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 20:45:02,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:45:02,859 INFO L175 Difference]: Start difference. First operand has 248 places, 341 transitions, 4216 flow. Second operand 10 states and 200 transitions. [2024-06-21 20:45:02,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 383 transitions, 5472 flow [2024-06-21 20:45:03,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 383 transitions, 5174 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 20:45:03,498 INFO L231 Difference]: Finished difference. Result has 253 places, 345 transitions, 4357 flow [2024-06-21 20:45:03,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4357, PETRI_PLACES=253, PETRI_TRANSITIONS=345} [2024-06-21 20:45:03,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-21 20:45:03,498 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 345 transitions, 4357 flow [2024-06-21 20:45:03,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:03,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:03,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:03,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:45:03,499 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:03,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1543452584, now seen corresponding path program 7 times [2024-06-21 20:45:03,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:03,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246151685] [2024-06-21 20:45:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:03,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:04,625 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 20:45:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246151685] [2024-06-21 20:45:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246151685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:04,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071240522] [2024-06-21 20:45:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:04,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:04,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:04,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 345 transitions, 4357 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:04,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:04,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:04,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:06,148 INFO L124 PetriNetUnfolderBase]: 3192/5018 cut-off events. [2024-06-21 20:45:06,148 INFO L125 PetriNetUnfolderBase]: For 556412/556412 co-relation queries the response was YES. [2024-06-21 20:45:06,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46737 conditions, 5018 events. 3192/5018 cut-off events. For 556412/556412 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28490 event pairs, 648 based on Foata normal form. 4/5020 useless extension candidates. Maximal degree in co-relation 46626. Up to 4219 conditions per place. [2024-06-21 20:45:06,205 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 142 changer transitions 0/392 dead transitions. [2024-06-21 20:45:06,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 392 transitions, 5703 flow [2024-06-21 20:45:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:45:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:45:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 20:45:06,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 20:45:06,206 INFO L175 Difference]: Start difference. First operand has 253 places, 345 transitions, 4357 flow. Second operand 10 states and 199 transitions. [2024-06-21 20:45:06,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 392 transitions, 5703 flow [2024-06-21 20:45:06,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 392 transitions, 5458 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:06,771 INFO L231 Difference]: Finished difference. Result has 257 places, 353 transitions, 4623 flow [2024-06-21 20:45:06,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4623, PETRI_PLACES=257, PETRI_TRANSITIONS=353} [2024-06-21 20:45:06,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-21 20:45:06,771 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 353 transitions, 4623 flow [2024-06-21 20:45:06,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:06,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:06,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:06,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:45:06,771 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:06,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1543691594, now seen corresponding path program 8 times [2024-06-21 20:45:06,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:06,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570580900] [2024-06-21 20:45:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:06,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:07,964 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 20:45:07,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:07,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570580900] [2024-06-21 20:45:07,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570580900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:07,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:07,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:07,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377054791] [2024-06-21 20:45:07,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:07,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:07,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:08,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:08,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 353 transitions, 4623 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:08,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:08,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:08,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:09,414 INFO L124 PetriNetUnfolderBase]: 3184/5006 cut-off events. [2024-06-21 20:45:09,414 INFO L125 PetriNetUnfolderBase]: For 563737/563737 co-relation queries the response was YES. [2024-06-21 20:45:09,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46994 conditions, 5006 events. 3184/5006 cut-off events. For 563737/563737 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28420 event pairs, 651 based on Foata normal form. 4/5008 useless extension candidates. Maximal degree in co-relation 46881. Up to 4259 conditions per place. [2024-06-21 20:45:09,469 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 140 changer transitions 0/389 dead transitions. [2024-06-21 20:45:09,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 389 transitions, 5515 flow [2024-06-21 20:45:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:45:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:45:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 20:45:09,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:45:09,470 INFO L175 Difference]: Start difference. First operand has 257 places, 353 transitions, 4623 flow. Second operand 10 states and 195 transitions. [2024-06-21 20:45:09,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 389 transitions, 5515 flow [2024-06-21 20:45:10,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 389 transitions, 5256 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-21 20:45:10,081 INFO L231 Difference]: Finished difference. Result has 263 places, 353 transitions, 4652 flow [2024-06-21 20:45:10,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4652, PETRI_PLACES=263, PETRI_TRANSITIONS=353} [2024-06-21 20:45:10,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-21 20:45:10,082 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 353 transitions, 4652 flow [2024-06-21 20:45:10,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:10,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:10,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:10,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:45:10,083 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:10,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1535120714, now seen corresponding path program 9 times [2024-06-21 20:45:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:10,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853776188] [2024-06-21 20:45:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:10,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:11,204 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 20:45:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:11,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853776188] [2024-06-21 20:45:11,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853776188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:11,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:11,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351317523] [2024-06-21 20:45:11,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:11,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:11,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:11,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 353 transitions, 4652 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:11,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:11,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:11,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:12,654 INFO L124 PetriNetUnfolderBase]: 3396/5340 cut-off events. [2024-06-21 20:45:12,654 INFO L125 PetriNetUnfolderBase]: For 587730/587730 co-relation queries the response was YES. [2024-06-21 20:45:12,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49054 conditions, 5340 events. 3396/5340 cut-off events. For 587730/587730 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30778 event pairs, 713 based on Foata normal form. 4/5342 useless extension candidates. Maximal degree in co-relation 48939. Up to 4298 conditions per place. [2024-06-21 20:45:12,712 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 257 selfloop transitions, 158 changer transitions 0/420 dead transitions. [2024-06-21 20:45:12,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 420 transitions, 6168 flow [2024-06-21 20:45:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:45:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:45:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:45:12,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-21 20:45:12,713 INFO L175 Difference]: Start difference. First operand has 263 places, 353 transitions, 4652 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:45:12,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 420 transitions, 6168 flow [2024-06-21 20:45:13,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 420 transitions, 5858 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 20:45:13,326 INFO L231 Difference]: Finished difference. Result has 268 places, 377 transitions, 5065 flow [2024-06-21 20:45:13,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5065, PETRI_PLACES=268, PETRI_TRANSITIONS=377} [2024-06-21 20:45:13,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-21 20:45:13,326 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 377 transitions, 5065 flow [2024-06-21 20:45:13,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:13,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:13,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:13,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:45:13,327 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:13,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1771592744, now seen corresponding path program 10 times [2024-06-21 20:45:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:13,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532675457] [2024-06-21 20:45:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:13,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:14,360 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 20:45:14,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:14,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532675457] [2024-06-21 20:45:14,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532675457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:14,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:14,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:14,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811870134] [2024-06-21 20:45:14,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:14,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:14,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:14,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:14,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 377 transitions, 5065 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:14,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:14,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:14,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:16,017 INFO L124 PetriNetUnfolderBase]: 3380/5316 cut-off events. [2024-06-21 20:45:16,017 INFO L125 PetriNetUnfolderBase]: For 596880/596880 co-relation queries the response was YES. [2024-06-21 20:45:16,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49237 conditions, 5316 events. 3380/5316 cut-off events. For 596880/596880 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30504 event pairs, 672 based on Foata normal form. 8/5322 useless extension candidates. Maximal degree in co-relation 49118. Up to 4558 conditions per place. [2024-06-21 20:45:16,084 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 264 selfloop transitions, 143 changer transitions 0/412 dead transitions. [2024-06-21 20:45:16,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 412 transitions, 5997 flow [2024-06-21 20:45:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:45:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:45:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:45:16,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:45:16,085 INFO L175 Difference]: Start difference. First operand has 268 places, 377 transitions, 5065 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:45:16,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 412 transitions, 5997 flow [2024-06-21 20:45:16,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 412 transitions, 5644 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-21 20:45:16,920 INFO L231 Difference]: Finished difference. Result has 274 places, 377 transitions, 5008 flow [2024-06-21 20:45:16,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5008, PETRI_PLACES=274, PETRI_TRANSITIONS=377} [2024-06-21 20:45:16,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-21 20:45:16,920 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 377 transitions, 5008 flow [2024-06-21 20:45:16,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:16,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:16,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:16,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:45:16,921 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:16,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash 778532372, now seen corresponding path program 1 times [2024-06-21 20:45:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:16,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460188392] [2024-06-21 20:45:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:16,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:17,665 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 20:45:17,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:17,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460188392] [2024-06-21 20:45:17,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460188392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:17,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:17,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:17,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227516232] [2024-06-21 20:45:17,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:17,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:17,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:17,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 377 transitions, 5008 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:17,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:17,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:17,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:18,832 INFO L124 PetriNetUnfolderBase]: 3213/5143 cut-off events. [2024-06-21 20:45:18,832 INFO L125 PetriNetUnfolderBase]: For 602643/602645 co-relation queries the response was YES. [2024-06-21 20:45:18,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47975 conditions, 5143 events. 3213/5143 cut-off events. For 602643/602645 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30338 event pairs, 694 based on Foata normal form. 4/5137 useless extension candidates. Maximal degree in co-relation 47855. Up to 4592 conditions per place. [2024-06-21 20:45:18,894 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 330 selfloop transitions, 32 changer transitions 0/408 dead transitions. [2024-06-21 20:45:18,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 408 transitions, 5889 flow [2024-06-21 20:45:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:18,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:45:18,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:45:18,895 INFO L175 Difference]: Start difference. First operand has 274 places, 377 transitions, 5008 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:45:18,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 408 transitions, 5889 flow [2024-06-21 20:45:19,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 408 transitions, 5536 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 20:45:19,716 INFO L231 Difference]: Finished difference. Result has 272 places, 380 transitions, 4799 flow [2024-06-21 20:45:19,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4799, PETRI_PLACES=272, PETRI_TRANSITIONS=380} [2024-06-21 20:45:19,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-21 20:45:19,717 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 380 transitions, 4799 flow [2024-06-21 20:45:19,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:19,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:19,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:19,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:45:19,718 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:19,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:19,718 INFO L85 PathProgramCache]: Analyzing trace with hash 778861065, now seen corresponding path program 1 times [2024-06-21 20:45:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:19,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408755581] [2024-06-21 20:45:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:19,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:20,709 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 20:45:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408755581] [2024-06-21 20:45:20,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408755581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:20,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:20,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:20,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237644410] [2024-06-21 20:45:20,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:20,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:20,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:20,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:20,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 380 transitions, 4799 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:20,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:20,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:20,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:21,851 INFO L124 PetriNetUnfolderBase]: 3220/5163 cut-off events. [2024-06-21 20:45:21,852 INFO L125 PetriNetUnfolderBase]: For 614427/614427 co-relation queries the response was YES. [2024-06-21 20:45:21,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48107 conditions, 5163 events. 3220/5163 cut-off events. For 614427/614427 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30545 event pairs, 707 based on Foata normal form. 1/5154 useless extension candidates. Maximal degree in co-relation 47987. Up to 4630 conditions per place. [2024-06-21 20:45:21,922 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 28 changer transitions 0/405 dead transitions. [2024-06-21 20:45:21,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 405 transitions, 5658 flow [2024-06-21 20:45:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:45:21,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:45:21,923 INFO L175 Difference]: Start difference. First operand has 272 places, 380 transitions, 4799 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:45:21,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 405 transitions, 5658 flow [2024-06-21 20:45:22,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 405 transitions, 5540 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:22,580 INFO L231 Difference]: Finished difference. Result has 274 places, 383 transitions, 4819 flow [2024-06-21 20:45:22,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4681, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4819, PETRI_PLACES=274, PETRI_TRANSITIONS=383} [2024-06-21 20:45:22,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-21 20:45:22,580 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 383 transitions, 4819 flow [2024-06-21 20:45:22,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:22,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:22,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:22,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:45:22,581 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:22,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash 778860662, now seen corresponding path program 2 times [2024-06-21 20:45:22,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:22,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440724009] [2024-06-21 20:45:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:23,421 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 20:45:23,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:23,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440724009] [2024-06-21 20:45:23,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440724009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:23,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:23,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:23,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578443229] [2024-06-21 20:45:23,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:23,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:23,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:23,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:23,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 383 transitions, 4819 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 20:45:23,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:23,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:23,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:24,560 INFO L124 PetriNetUnfolderBase]: 3222/5172 cut-off events. [2024-06-21 20:45:24,560 INFO L125 PetriNetUnfolderBase]: For 633294/633294 co-relation queries the response was YES. [2024-06-21 20:45:24,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48573 conditions, 5172 events. 3222/5172 cut-off events. For 633294/633294 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30647 event pairs, 709 based on Foata normal form. 2/5164 useless extension candidates. Maximal degree in co-relation 48452. Up to 4602 conditions per place. [2024-06-21 20:45:24,624 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 326 selfloop transitions, 36 changer transitions 0/408 dead transitions. [2024-06-21 20:45:24,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 408 transitions, 5685 flow [2024-06-21 20:45:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:45:24,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:45:24,625 INFO L175 Difference]: Start difference. First operand has 274 places, 383 transitions, 4819 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:45:24,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 408 transitions, 5685 flow [2024-06-21 20:45:25,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 408 transitions, 5581 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:45:25,380 INFO L231 Difference]: Finished difference. Result has 277 places, 386 transitions, 4873 flow [2024-06-21 20:45:25,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4873, PETRI_PLACES=277, PETRI_TRANSITIONS=386} [2024-06-21 20:45:25,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-21 20:45:25,381 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 386 transitions, 4873 flow [2024-06-21 20:45:25,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 20:45:25,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:25,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:25,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:45:25,381 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:25,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash 789960212, now seen corresponding path program 3 times [2024-06-21 20:45:25,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:25,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308012387] [2024-06-21 20:45:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:25,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:26,213 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 20:45:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308012387] [2024-06-21 20:45:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308012387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:26,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:26,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906645959] [2024-06-21 20:45:26,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:26,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:26,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:26,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:26,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 386 transitions, 4873 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:26,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:26,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:26,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:27,315 INFO L124 PetriNetUnfolderBase]: 3232/5187 cut-off events. [2024-06-21 20:45:27,315 INFO L125 PetriNetUnfolderBase]: For 650043/650043 co-relation queries the response was YES. [2024-06-21 20:45:27,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49255 conditions, 5187 events. 3232/5187 cut-off events. For 650043/650043 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30710 event pairs, 657 based on Foata normal form. 2/5179 useless extension candidates. Maximal degree in co-relation 49133. Up to 4596 conditions per place. [2024-06-21 20:45:27,379 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 40 changer transitions 0/406 dead transitions. [2024-06-21 20:45:27,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 406 transitions, 5725 flow [2024-06-21 20:45:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:45:27,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:45:27,380 INFO L175 Difference]: Start difference. First operand has 277 places, 386 transitions, 4873 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:45:27,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 406 transitions, 5725 flow [2024-06-21 20:45:28,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 406 transitions, 5589 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:28,053 INFO L231 Difference]: Finished difference. Result has 279 places, 389 transitions, 4909 flow [2024-06-21 20:45:28,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4909, PETRI_PLACES=279, PETRI_TRANSITIONS=389} [2024-06-21 20:45:28,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-21 20:45:28,053 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 389 transitions, 4909 flow [2024-06-21 20:45:28,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:28,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:28,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:45:28,054 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:28,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:28,054 INFO L85 PathProgramCache]: Analyzing trace with hash 789960615, now seen corresponding path program 2 times [2024-06-21 20:45:28,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:28,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453507646] [2024-06-21 20:45:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:28,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:28,968 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 20:45:28,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:28,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453507646] [2024-06-21 20:45:28,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453507646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:28,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:28,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728035230] [2024-06-21 20:45:28,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:28,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:28,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:29,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:29,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 389 transitions, 4909 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:29,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:29,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:29,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:30,079 INFO L124 PetriNetUnfolderBase]: 3242/5197 cut-off events. [2024-06-21 20:45:30,079 INFO L125 PetriNetUnfolderBase]: For 664275/664277 co-relation queries the response was YES. [2024-06-21 20:45:30,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49868 conditions, 5197 events. 3242/5197 cut-off events. For 664275/664277 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30750 event pairs, 651 based on Foata normal form. 3/5190 useless extension candidates. Maximal degree in co-relation 49745. Up to 4641 conditions per place. [2024-06-21 20:45:30,146 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 333 selfloop transitions, 30 changer transitions 0/409 dead transitions. [2024-06-21 20:45:30,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 409 transitions, 5770 flow [2024-06-21 20:45:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:45:30,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:45:30,147 INFO L175 Difference]: Start difference. First operand has 279 places, 389 transitions, 4909 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:45:30,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 409 transitions, 5770 flow [2024-06-21 20:45:30,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 409 transitions, 5620 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:30,962 INFO L231 Difference]: Finished difference. Result has 281 places, 392 transitions, 4911 flow [2024-06-21 20:45:30,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4911, PETRI_PLACES=281, PETRI_TRANSITIONS=392} [2024-06-21 20:45:30,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-21 20:45:30,963 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 392 transitions, 4911 flow [2024-06-21 20:45:30,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:30,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:30,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:45:30,963 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:30,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 789973635, now seen corresponding path program 3 times [2024-06-21 20:45:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:30,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092960729] [2024-06-21 20:45:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:31,944 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 20:45:31,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:31,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092960729] [2024-06-21 20:45:31,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092960729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:31,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:31,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:31,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862375280] [2024-06-21 20:45:31,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:31,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:31,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:32,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:32,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 392 transitions, 4911 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:32,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:32,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:32,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:33,048 INFO L124 PetriNetUnfolderBase]: 3247/5204 cut-off events. [2024-06-21 20:45:33,048 INFO L125 PetriNetUnfolderBase]: For 680307/680309 co-relation queries the response was YES. [2024-06-21 20:45:33,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50381 conditions, 5204 events. 3247/5204 cut-off events. For 680307/680309 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 30785 event pairs, 651 based on Foata normal form. 3/5197 useless extension candidates. Maximal degree in co-relation 50257. Up to 4639 conditions per place. [2024-06-21 20:45:33,117 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 328 selfloop transitions, 38 changer transitions 0/412 dead transitions. [2024-06-21 20:45:33,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 412 transitions, 5784 flow [2024-06-21 20:45:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:45:33,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:45:33,118 INFO L175 Difference]: Start difference. First operand has 281 places, 392 transitions, 4911 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:45:33,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 412 transitions, 5784 flow [2024-06-21 20:45:33,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 412 transitions, 5654 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:33,754 INFO L231 Difference]: Finished difference. Result has 283 places, 395 transitions, 4955 flow [2024-06-21 20:45:33,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4955, PETRI_PLACES=283, PETRI_TRANSITIONS=395} [2024-06-21 20:45:33,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-21 20:45:33,755 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 395 transitions, 4955 flow [2024-06-21 20:45:33,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:45:33,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:33,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:45:33,755 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:33,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash 789974100, now seen corresponding path program 1 times [2024-06-21 20:45:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:33,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711342944] [2024-06-21 20:45:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:34,946 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 20:45:34,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:34,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711342944] [2024-06-21 20:45:34,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711342944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:34,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:34,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789409893] [2024-06-21 20:45:34,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:34,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:34,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:35,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:45:35,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 395 transitions, 4955 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:35,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:35,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:45:35,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:36,206 INFO L124 PetriNetUnfolderBase]: 3043/4973 cut-off events. [2024-06-21 20:45:36,206 INFO L125 PetriNetUnfolderBase]: For 687021/687023 co-relation queries the response was YES. [2024-06-21 20:45:36,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49599 conditions, 4973 events. 3043/4973 cut-off events. For 687021/687023 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30051 event pairs, 616 based on Foata normal form. 3/4954 useless extension candidates. Maximal degree in co-relation 49474. Up to 4228 conditions per place. [2024-06-21 20:45:36,266 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 312 selfloop transitions, 26 changer transitions 0/418 dead transitions. [2024-06-21 20:45:36,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 418 transitions, 5806 flow [2024-06-21 20:45:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:45:36,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:45:36,267 INFO L175 Difference]: Start difference. First operand has 283 places, 395 transitions, 4955 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:45:36,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 418 transitions, 5806 flow [2024-06-21 20:45:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 418 transitions, 5645 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:37,197 INFO L231 Difference]: Finished difference. Result has 288 places, 404 transitions, 5012 flow [2024-06-21 20:45:37,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4803, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5012, PETRI_PLACES=288, PETRI_TRANSITIONS=404} [2024-06-21 20:45:37,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 20:45:37,198 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 404 transitions, 5012 flow [2024-06-21 20:45:37,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:37,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:37,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:37,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:45:37,199 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:37,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1024771612, now seen corresponding path program 3 times [2024-06-21 20:45:37,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:37,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073591735] [2024-06-21 20:45:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:37,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:38,001 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 20:45:38,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:38,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073591735] [2024-06-21 20:45:38,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073591735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:38,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:38,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:45:38,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571886431] [2024-06-21 20:45:38,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:45:38,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:38,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:45:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:45:38,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:38,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 404 transitions, 5012 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:38,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:38,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:38,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:39,496 INFO L124 PetriNetUnfolderBase]: 3235/5168 cut-off events. [2024-06-21 20:45:39,497 INFO L125 PetriNetUnfolderBase]: For 695611/695615 co-relation queries the response was YES. [2024-06-21 20:45:39,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51077 conditions, 5168 events. 3235/5168 cut-off events. For 695611/695615 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30303 event pairs, 618 based on Foata normal form. 6/5131 useless extension candidates. Maximal degree in co-relation 50949. Up to 4644 conditions per place. [2024-06-21 20:45:39,556 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 36 changer transitions 0/422 dead transitions. [2024-06-21 20:45:39,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 422 transitions, 5850 flow [2024-06-21 20:45:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:45:39,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:45:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:45:39,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:45:39,557 INFO L175 Difference]: Start difference. First operand has 288 places, 404 transitions, 5012 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:45:39,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 422 transitions, 5850 flow [2024-06-21 20:45:40,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 422 transitions, 5631 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:40,260 INFO L231 Difference]: Finished difference. Result has 288 places, 404 transitions, 4872 flow [2024-06-21 20:45:40,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4793, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4872, PETRI_PLACES=288, PETRI_TRANSITIONS=404} [2024-06-21 20:45:40,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 20:45:40,261 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 404 transitions, 4872 flow [2024-06-21 20:45:40,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:40,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:40,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:40,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:45:40,261 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:40,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:40,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1025159422, now seen corresponding path program 4 times [2024-06-21 20:45:40,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:40,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460161651] [2024-06-21 20:45:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:40,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:41,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:41,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460161651] [2024-06-21 20:45:41,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460161651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:41,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:41,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:41,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946527605] [2024-06-21 20:45:41,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:41,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:41,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:41,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:41,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 404 transitions, 4872 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:45:41,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:41,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:41,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:42,634 INFO L124 PetriNetUnfolderBase]: 3232/5170 cut-off events. [2024-06-21 20:45:42,634 INFO L125 PetriNetUnfolderBase]: For 711666/711670 co-relation queries the response was YES. [2024-06-21 20:45:42,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51266 conditions, 5170 events. 3232/5170 cut-off events. For 711666/711670 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 30400 event pairs, 618 based on Foata normal form. 6/5133 useless extension candidates. Maximal degree in co-relation 51138. Up to 4619 conditions per place. [2024-06-21 20:45:42,713 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 338 selfloop transitions, 46 changer transitions 0/423 dead transitions. [2024-06-21 20:45:42,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 423 transitions, 5802 flow [2024-06-21 20:45:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:45:42,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 20:45:42,714 INFO L175 Difference]: Start difference. First operand has 288 places, 404 transitions, 4872 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:45:42,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 423 transitions, 5802 flow [2024-06-21 20:45:43,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 423 transitions, 5657 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:45:43,308 INFO L231 Difference]: Finished difference. Result has 288 places, 407 transitions, 4919 flow [2024-06-21 20:45:43,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4919, PETRI_PLACES=288, PETRI_TRANSITIONS=407} [2024-06-21 20:45:43,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 20:45:43,309 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 407 transitions, 4919 flow [2024-06-21 20:45:43,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:45:43,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:43,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:43,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:45:43,309 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:43,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1070251590, now seen corresponding path program 11 times [2024-06-21 20:45:43,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:43,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409992073] [2024-06-21 20:45:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:43,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:44,342 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 20:45:44,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:44,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409992073] [2024-06-21 20:45:44,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409992073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:44,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:44,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708192435] [2024-06-21 20:45:44,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:44,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:44,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:44,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:44,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 407 transitions, 4919 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:44,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:44,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:44,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:45,851 INFO L124 PetriNetUnfolderBase]: 3497/5506 cut-off events. [2024-06-21 20:45:45,851 INFO L125 PetriNetUnfolderBase]: For 748033/748035 co-relation queries the response was YES. [2024-06-21 20:45:45,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54294 conditions, 5506 events. 3497/5506 cut-off events. For 748033/748035 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 31799 event pairs, 670 based on Foata normal form. 6/5511 useless extension candidates. Maximal degree in co-relation 54165. Up to 4643 conditions per place. [2024-06-21 20:45:45,924 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 299 selfloop transitions, 151 changer transitions 0/455 dead transitions. [2024-06-21 20:45:45,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 455 transitions, 6459 flow [2024-06-21 20:45:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:45:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:45:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 20:45:45,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 20:45:45,925 INFO L175 Difference]: Start difference. First operand has 288 places, 407 transitions, 4919 flow. Second operand 10 states and 197 transitions. [2024-06-21 20:45:45,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 455 transitions, 6459 flow [2024-06-21 20:45:46,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 455 transitions, 6293 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:46,600 INFO L231 Difference]: Finished difference. Result has 293 places, 417 transitions, 5380 flow [2024-06-21 20:45:46,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5380, PETRI_PLACES=293, PETRI_TRANSITIONS=417} [2024-06-21 20:45:46,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-21 20:45:46,601 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 417 transitions, 5380 flow [2024-06-21 20:45:46,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:46,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:46,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:46,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:45:46,601 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:46,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1020927794, now seen corresponding path program 6 times [2024-06-21 20:45:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:46,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702298261] [2024-06-21 20:45:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:46,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:47,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:47,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702298261] [2024-06-21 20:45:47,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702298261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:47,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:47,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:47,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759340181] [2024-06-21 20:45:47,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:47,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:47,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:47,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:47,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:47,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:47,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 417 transitions, 5380 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:47,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:47,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:47,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:49,191 INFO L124 PetriNetUnfolderBase]: 3522/5540 cut-off events. [2024-06-21 20:45:49,192 INFO L125 PetriNetUnfolderBase]: For 792773/792775 co-relation queries the response was YES. [2024-06-21 20:45:49,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55197 conditions, 5540 events. 3522/5540 cut-off events. For 792773/792775 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 31954 event pairs, 660 based on Foata normal form. 20/5559 useless extension candidates. Maximal degree in co-relation 55066. Up to 4493 conditions per place. [2024-06-21 20:45:49,261 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 317 selfloop transitions, 135 changer transitions 0/457 dead transitions. [2024-06-21 20:45:49,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 457 transitions, 6554 flow [2024-06-21 20:45:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:45:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:45:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 20:45:49,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 20:45:49,262 INFO L175 Difference]: Start difference. First operand has 293 places, 417 transitions, 5380 flow. Second operand 10 states and 198 transitions. [2024-06-21 20:45:49,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 457 transitions, 6554 flow [2024-06-21 20:45:50,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 457 transitions, 6399 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-21 20:45:50,131 INFO L231 Difference]: Finished difference. Result has 300 places, 418 transitions, 5588 flow [2024-06-21 20:45:50,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5237, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5588, PETRI_PLACES=300, PETRI_TRANSITIONS=418} [2024-06-21 20:45:50,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-21 20:45:50,132 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 418 transitions, 5588 flow [2024-06-21 20:45:50,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:50,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:50,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:50,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:45:50,132 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:50,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1021112492, now seen corresponding path program 12 times [2024-06-21 20:45:50,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:50,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618258250] [2024-06-21 20:45:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:50,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:51,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:51,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618258250] [2024-06-21 20:45:51,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618258250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:51,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:51,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:51,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867893390] [2024-06-21 20:45:51,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:51,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:51,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:51,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 418 transitions, 5588 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:51,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:51,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:51,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:52,978 INFO L124 PetriNetUnfolderBase]: 3550/5592 cut-off events. [2024-06-21 20:45:52,978 INFO L125 PetriNetUnfolderBase]: For 774388/774390 co-relation queries the response was YES. [2024-06-21 20:45:53,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55665 conditions, 5592 events. 3550/5592 cut-off events. For 774388/774390 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32448 event pairs, 686 based on Foata normal form. 6/5597 useless extension candidates. Maximal degree in co-relation 55532. Up to 4830 conditions per place. [2024-06-21 20:45:53,067 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 305 selfloop transitions, 146 changer transitions 0/456 dead transitions. [2024-06-21 20:45:53,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 456 transitions, 6749 flow [2024-06-21 20:45:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:45:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:45:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 20:45:53,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355179704016913 [2024-06-21 20:45:53,068 INFO L175 Difference]: Start difference. First operand has 300 places, 418 transitions, 5588 flow. Second operand 11 states and 206 transitions. [2024-06-21 20:45:53,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 456 transitions, 6749 flow [2024-06-21 20:45:54,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 456 transitions, 6420 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 20:45:54,170 INFO L231 Difference]: Finished difference. Result has 303 places, 423 transitions, 5711 flow [2024-06-21 20:45:54,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5711, PETRI_PLACES=303, PETRI_TRANSITIONS=423} [2024-06-21 20:45:54,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-21 20:45:54,171 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 423 transitions, 5711 flow [2024-06-21 20:45:54,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:54,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:54,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:54,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:45:54,171 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:54,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:54,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1027368602, now seen corresponding path program 13 times [2024-06-21 20:45:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:54,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999586932] [2024-06-21 20:45:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:55,193 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 20:45:55,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:55,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999586932] [2024-06-21 20:45:55,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999586932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:55,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:55,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:55,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375885615] [2024-06-21 20:45:55,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:55,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:55,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:55,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:55,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 423 transitions, 5711 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:55,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:55,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:55,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:56,798 INFO L124 PetriNetUnfolderBase]: 3578/5635 cut-off events. [2024-06-21 20:45:56,798 INFO L125 PetriNetUnfolderBase]: For 784383/784385 co-relation queries the response was YES. [2024-06-21 20:45:56,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55953 conditions, 5635 events. 3578/5635 cut-off events. For 784383/784385 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32724 event pairs, 702 based on Foata normal form. 6/5640 useless extension candidates. Maximal degree in co-relation 55819. Up to 4869 conditions per place. [2024-06-21 20:45:56,990 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 311 selfloop transitions, 144 changer transitions 0/460 dead transitions. [2024-06-21 20:45:56,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 460 transitions, 6874 flow [2024-06-21 20:45:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:45:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:45:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 20:45:56,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 20:45:56,991 INFO L175 Difference]: Start difference. First operand has 303 places, 423 transitions, 5711 flow. Second operand 10 states and 193 transitions. [2024-06-21 20:45:56,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 460 transitions, 6874 flow [2024-06-21 20:45:57,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 460 transitions, 6487 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 20:45:57,877 INFO L231 Difference]: Finished difference. Result has 305 places, 428 transitions, 5776 flow [2024-06-21 20:45:57,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5776, PETRI_PLACES=305, PETRI_TRANSITIONS=428} [2024-06-21 20:45:57,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-21 20:45:57,878 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 428 transitions, 5776 flow [2024-06-21 20:45:57,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:57,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:57,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:45:57,879 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:57,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1027607612, now seen corresponding path program 14 times [2024-06-21 20:45:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471524693] [2024-06-21 20:45:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:58,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:58,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471524693] [2024-06-21 20:45:58,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471524693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:58,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:58,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:58,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958121750] [2024-06-21 20:45:58,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:58,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:58,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:58,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:58,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:45:58,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 428 transitions, 5776 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:58,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:58,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:45:58,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:00,470 INFO L124 PetriNetUnfolderBase]: 3595/5652 cut-off events. [2024-06-21 20:46:00,471 INFO L125 PetriNetUnfolderBase]: For 804458/804460 co-relation queries the response was YES. [2024-06-21 20:46:00,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56326 conditions, 5652 events. 3595/5652 cut-off events. For 804458/804460 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 32744 event pairs, 692 based on Foata normal form. 6/5657 useless extension candidates. Maximal degree in co-relation 56192. Up to 4837 conditions per place. [2024-06-21 20:46:00,550 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 309 selfloop transitions, 149 changer transitions 0/463 dead transitions. [2024-06-21 20:46:00,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 463 transitions, 6896 flow [2024-06-21 20:46:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:46:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:46:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 20:46:00,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-21 20:46:00,551 INFO L175 Difference]: Start difference. First operand has 305 places, 428 transitions, 5776 flow. Second operand 10 states and 194 transitions. [2024-06-21 20:46:00,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 463 transitions, 6896 flow [2024-06-21 20:46:01,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 463 transitions, 6542 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:01,571 INFO L231 Difference]: Finished difference. Result has 309 places, 430 transitions, 5833 flow [2024-06-21 20:46:01,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5422, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5833, PETRI_PLACES=309, PETRI_TRANSITIONS=430} [2024-06-21 20:46:01,571 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 20:46:01,572 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 430 transitions, 5833 flow [2024-06-21 20:46:01,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:01,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:01,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:01,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:46:01,572 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:01,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:01,573 INFO L85 PathProgramCache]: Analyzing trace with hash 389188830, now seen corresponding path program 15 times [2024-06-21 20:46:01,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:01,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757246316] [2024-06-21 20:46:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:01,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:02,606 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 20:46:02,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:02,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757246316] [2024-06-21 20:46:02,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757246316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:02,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:02,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:46:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223770120] [2024-06-21 20:46:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:02,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:46:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:46:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:46:02,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:46:02,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 430 transitions, 5833 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:02,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:02,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:46:02,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:04,252 INFO L124 PetriNetUnfolderBase]: 3612/5693 cut-off events. [2024-06-21 20:46:04,252 INFO L125 PetriNetUnfolderBase]: For 823031/823033 co-relation queries the response was YES. [2024-06-21 20:46:04,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56754 conditions, 5693 events. 3612/5693 cut-off events. For 823031/823033 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33185 event pairs, 696 based on Foata normal form. 6/5698 useless extension candidates. Maximal degree in co-relation 56619. Up to 4876 conditions per place. [2024-06-21 20:46:04,322 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 307 selfloop transitions, 156 changer transitions 0/468 dead transitions. [2024-06-21 20:46:04,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 468 transitions, 7219 flow [2024-06-21 20:46:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:46:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:46:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 20:46:04,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:46:04,324 INFO L175 Difference]: Start difference. First operand has 309 places, 430 transitions, 5833 flow. Second operand 10 states and 195 transitions. [2024-06-21 20:46:04,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 468 transitions, 7219 flow [2024-06-21 20:46:05,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 468 transitions, 6826 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-21 20:46:05,480 INFO L231 Difference]: Finished difference. Result has 311 places, 432 transitions, 5827 flow [2024-06-21 20:46:05,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5827, PETRI_PLACES=311, PETRI_TRANSITIONS=432} [2024-06-21 20:46:05,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-21 20:46:05,480 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 432 transitions, 5827 flow [2024-06-21 20:46:05,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:05,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:05,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:05,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:46:05,481 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:05,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash 352081768, now seen corresponding path program 16 times [2024-06-21 20:46:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:05,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707427553] [2024-06-21 20:46:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:06,614 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 20:46:06,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:06,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707427553] [2024-06-21 20:46:06,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707427553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:06,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:06,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:46:06,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989844195] [2024-06-21 20:46:06,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:06,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:46:06,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:46:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:46:06,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:46:06,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 432 transitions, 5827 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:06,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:06,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:46:06,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:08,305 INFO L124 PetriNetUnfolderBase]: 3604/5681 cut-off events. [2024-06-21 20:46:08,305 INFO L125 PetriNetUnfolderBase]: For 827299/827301 co-relation queries the response was YES. [2024-06-21 20:46:08,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56403 conditions, 5681 events. 3604/5681 cut-off events. For 827299/827301 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33074 event pairs, 688 based on Foata normal form. 6/5686 useless extension candidates. Maximal degree in co-relation 56267. Up to 4911 conditions per place. [2024-06-21 20:46:08,379 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 305 selfloop transitions, 156 changer transitions 0/466 dead transitions. [2024-06-21 20:46:08,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 466 transitions, 6865 flow [2024-06-21 20:46:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:46:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:46:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 20:46:08,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334038054968288 [2024-06-21 20:46:08,380 INFO L175 Difference]: Start difference. First operand has 311 places, 432 transitions, 5827 flow. Second operand 11 states and 205 transitions. [2024-06-21 20:46:08,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 466 transitions, 6865 flow [2024-06-21 20:46:09,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 466 transitions, 6432 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 20:46:09,431 INFO L231 Difference]: Finished difference. Result has 314 places, 432 transitions, 5713 flow [2024-06-21 20:46:09,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5394, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5713, PETRI_PLACES=314, PETRI_TRANSITIONS=432} [2024-06-21 20:46:09,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-21 20:46:09,432 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 432 transitions, 5713 flow [2024-06-21 20:46:09,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:09,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:09,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:09,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:46:09,432 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:09,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1249013642, now seen corresponding path program 17 times [2024-06-21 20:46:09,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:09,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053935697] [2024-06-21 20:46:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:10,788 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 20:46:10,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:10,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053935697] [2024-06-21 20:46:10,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053935697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:10,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:10,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:46:10,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843257001] [2024-06-21 20:46:10,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:10,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:46:10,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:10,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:46:10,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:46:10,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:46:10,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 432 transitions, 5713 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:10,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:10,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:46:10,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:12,332 INFO L124 PetriNetUnfolderBase]: 3621/5696 cut-off events. [2024-06-21 20:46:12,333 INFO L125 PetriNetUnfolderBase]: For 845739/845741 co-relation queries the response was YES. [2024-06-21 20:46:12,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56668 conditions, 5696 events. 3621/5696 cut-off events. For 845739/845741 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33042 event pairs, 692 based on Foata normal form. 6/5701 useless extension candidates. Maximal degree in co-relation 56531. Up to 4938 conditions per place. [2024-06-21 20:46:12,412 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 322 selfloop transitions, 141 changer transitions 0/468 dead transitions. [2024-06-21 20:46:12,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 468 transitions, 6855 flow [2024-06-21 20:46:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:46:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:46:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 20:46:12,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-21 20:46:12,413 INFO L175 Difference]: Start difference. First operand has 314 places, 432 transitions, 5713 flow. Second operand 10 states and 194 transitions. [2024-06-21 20:46:12,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 468 transitions, 6855 flow [2024-06-21 20:46:13,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 468 transitions, 6533 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:46:13,673 INFO L231 Difference]: Finished difference. Result has 314 places, 434 transitions, 5790 flow [2024-06-21 20:46:13,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5790, PETRI_PLACES=314, PETRI_TRANSITIONS=434} [2024-06-21 20:46:13,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-21 20:46:13,673 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 434 transitions, 5790 flow [2024-06-21 20:46:13,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:13,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:13,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:13,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:46:13,674 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:13,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2132373098, now seen corresponding path program 18 times [2024-06-21 20:46:13,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:13,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086409882] [2024-06-21 20:46:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:14,701 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 20:46:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086409882] [2024-06-21 20:46:14,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086409882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:14,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:14,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:46:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635906481] [2024-06-21 20:46:14,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:14,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:46:14,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:46:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:46:14,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:46:14,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 434 transitions, 5790 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:14,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:14,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:46:14,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:16,297 INFO L124 PetriNetUnfolderBase]: 3638/5733 cut-off events. [2024-06-21 20:46:16,298 INFO L125 PetriNetUnfolderBase]: For 869500/869502 co-relation queries the response was YES. [2024-06-21 20:46:16,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57311 conditions, 5733 events. 3638/5733 cut-off events. For 869500/869502 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33400 event pairs, 702 based on Foata normal form. 6/5738 useless extension candidates. Maximal degree in co-relation 57173. Up to 4924 conditions per place. [2024-06-21 20:46:16,374 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 322 selfloop transitions, 144 changer transitions 0/471 dead transitions. [2024-06-21 20:46:16,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 471 transitions, 6944 flow [2024-06-21 20:46:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:46:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:46:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:46:16,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:46:16,375 INFO L175 Difference]: Start difference. First operand has 314 places, 434 transitions, 5790 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:46:16,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 471 transitions, 6944 flow [2024-06-21 20:46:17,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 471 transitions, 6494 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 20:46:17,505 INFO L231 Difference]: Finished difference. Result has 317 places, 436 transitions, 5749 flow [2024-06-21 20:46:17,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5340, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5749, PETRI_PLACES=317, PETRI_TRANSITIONS=436} [2024-06-21 20:46:17,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-21 20:46:17,505 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 436 transitions, 5749 flow [2024-06-21 20:46:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:17,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:17,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:17,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:46:17,506 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:17,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2124041228, now seen corresponding path program 19 times [2024-06-21 20:46:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958954895] [2024-06-21 20:46:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:18,523 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 20:46:18,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:18,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958954895] [2024-06-21 20:46:18,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958954895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:18,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:18,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:46:18,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090737760] [2024-06-21 20:46:18,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:18,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:46:18,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:46:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:46:18,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:46:18,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 436 transitions, 5749 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:18,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:18,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:46:18,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:20,066 INFO L124 PetriNetUnfolderBase]: 3655/5750 cut-off events. [2024-06-21 20:46:20,067 INFO L125 PetriNetUnfolderBase]: For 889669/889671 co-relation queries the response was YES. [2024-06-21 20:46:20,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57712 conditions, 5750 events. 3655/5750 cut-off events. For 889669/889671 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33436 event pairs, 692 based on Foata normal form. 6/5755 useless extension candidates. Maximal degree in co-relation 57573. Up to 4807 conditions per place. [2024-06-21 20:46:20,146 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 315 selfloop transitions, 154 changer transitions 0/474 dead transitions. [2024-06-21 20:46:20,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 474 transitions, 6915 flow [2024-06-21 20:46:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:46:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:46:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:46:20,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:46:20,147 INFO L175 Difference]: Start difference. First operand has 317 places, 436 transitions, 5749 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:46:20,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 474 transitions, 6915 flow [2024-06-21 20:46:21,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 474 transitions, 6524 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-21 20:46:21,520 INFO L231 Difference]: Finished difference. Result has 319 places, 438 transitions, 5791 flow [2024-06-21 20:46:21,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5791, PETRI_PLACES=319, PETRI_TRANSITIONS=438} [2024-06-21 20:46:21,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-21 20:46:21,520 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 438 transitions, 5791 flow [2024-06-21 20:46:21,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:21,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:21,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:21,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:46:21,521 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:21,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1543932974, now seen corresponding path program 20 times [2024-06-21 20:46:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:21,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411525592] [2024-06-21 20:46:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:22,653 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 20:46:22,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:22,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411525592] [2024-06-21 20:46:22,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411525592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:22,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:22,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:46:22,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018941039] [2024-06-21 20:46:22,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:22,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:46:22,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:46:22,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:46:22,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:46:22,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 438 transitions, 5791 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:22,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:22,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:46:22,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:24,154 INFO L124 PetriNetUnfolderBase]: 3672/5789 cut-off events. [2024-06-21 20:46:24,154 INFO L125 PetriNetUnfolderBase]: For 910820/910822 co-relation queries the response was YES. [2024-06-21 20:46:24,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58261 conditions, 5789 events. 3672/5789 cut-off events. For 910820/910822 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33864 event pairs, 606 based on Foata normal form. 6/5794 useless extension candidates. Maximal degree in co-relation 58121. Up to 4013 conditions per place. [2024-06-21 20:46:24,235 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 246 selfloop transitions, 229 changer transitions 0/480 dead transitions. [2024-06-21 20:46:24,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 480 transitions, 7391 flow [2024-06-21 20:46:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:46:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:46:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:46:24,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:46:24,237 INFO L175 Difference]: Start difference. First operand has 319 places, 438 transitions, 5791 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:46:24,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 480 transitions, 7391 flow [2024-06-21 20:46:25,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 480 transitions, 6976 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 20:46:25,476 INFO L231 Difference]: Finished difference. Result has 321 places, 442 transitions, 6081 flow [2024-06-21 20:46:25,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6081, PETRI_PLACES=321, PETRI_TRANSITIONS=442} [2024-06-21 20:46:25,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-21 20:46:25,477 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 442 transitions, 6081 flow [2024-06-21 20:46:25,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:25,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:25,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:25,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:46:25,477 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:25,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1181994622, now seen corresponding path program 5 times [2024-06-21 20:46:25,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:25,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921299208] [2024-06-21 20:46:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:26,357 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 20:46:26,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:26,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921299208] [2024-06-21 20:46:26,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921299208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:26,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:26,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:26,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717396307] [2024-06-21 20:46:26,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:26,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:26,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:26,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:26,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 442 transitions, 6081 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:46:26,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:26,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:26,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:27,596 INFO L124 PetriNetUnfolderBase]: 3407/5484 cut-off events. [2024-06-21 20:46:27,596 INFO L125 PetriNetUnfolderBase]: For 928886/928892 co-relation queries the response was YES. [2024-06-21 20:46:27,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57583 conditions, 5484 events. 3407/5484 cut-off events. For 928886/928892 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32976 event pairs, 643 based on Foata normal form. 8/5428 useless extension candidates. Maximal degree in co-relation 57442. Up to 4878 conditions per place. [2024-06-21 20:46:27,674 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 359 selfloop transitions, 64 changer transitions 0/462 dead transitions. [2024-06-21 20:46:27,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 462 transitions, 7363 flow [2024-06-21 20:46:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:46:27,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:46:27,675 INFO L175 Difference]: Start difference. First operand has 321 places, 442 transitions, 6081 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:46:27,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 462 transitions, 7363 flow [2024-06-21 20:46:29,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 462 transitions, 7043 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:29,178 INFO L231 Difference]: Finished difference. Result has 323 places, 448 transitions, 6089 flow [2024-06-21 20:46:29,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6089, PETRI_PLACES=323, PETRI_TRANSITIONS=448} [2024-06-21 20:46:29,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-21 20:46:29,178 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 448 transitions, 6089 flow [2024-06-21 20:46:29,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:46:29,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:29,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:29,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:46:29,179 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:29,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:29,179 INFO L85 PathProgramCache]: Analyzing trace with hash 717577556, now seen corresponding path program 6 times [2024-06-21 20:46:29,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:29,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562396064] [2024-06-21 20:46:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:29,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:29,943 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 20:46:29,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562396064] [2024-06-21 20:46:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562396064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:29,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:46:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424115055] [2024-06-21 20:46:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:29,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:46:29,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:46:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:46:29,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:29,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 448 transitions, 6089 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:29,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:29,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:29,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:31,132 INFO L124 PetriNetUnfolderBase]: 3401/5476 cut-off events. [2024-06-21 20:46:31,132 INFO L125 PetriNetUnfolderBase]: For 929738/929744 co-relation queries the response was YES. [2024-06-21 20:46:31,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57107 conditions, 5476 events. 3401/5476 cut-off events. For 929738/929744 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32887 event pairs, 640 based on Foata normal form. 8/5420 useless extension candidates. Maximal degree in co-relation 56964. Up to 4873 conditions per place. [2024-06-21 20:46:31,202 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 361 selfloop transitions, 61 changer transitions 0/461 dead transitions. [2024-06-21 20:46:31,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 461 transitions, 6999 flow [2024-06-21 20:46:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:46:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:46:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:46:31,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 20:46:31,203 INFO L175 Difference]: Start difference. First operand has 323 places, 448 transitions, 6089 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:46:31,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 461 transitions, 6999 flow [2024-06-21 20:46:32,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 461 transitions, 6769 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-21 20:46:32,322 INFO L231 Difference]: Finished difference. Result has 326 places, 448 transitions, 5987 flow [2024-06-21 20:46:32,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5987, PETRI_PLACES=326, PETRI_TRANSITIONS=448} [2024-06-21 20:46:32,322 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-21 20:46:32,323 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 448 transitions, 5987 flow [2024-06-21 20:46:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:32,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:32,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:32,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:46:32,323 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:32,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 717585492, now seen corresponding path program 2 times [2024-06-21 20:46:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:32,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576392] [2024-06-21 20:46:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:33,379 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 20:46:33,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:33,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576392] [2024-06-21 20:46:33,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:33,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:33,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:33,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217873592] [2024-06-21 20:46:33,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:33,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:33,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:33,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:33,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:33,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:46:33,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 448 transitions, 5987 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:33,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:33,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:46:33,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:34,602 INFO L124 PetriNetUnfolderBase]: 3187/5267 cut-off events. [2024-06-21 20:46:34,602 INFO L125 PetriNetUnfolderBase]: For 942734/942738 co-relation queries the response was YES. [2024-06-21 20:46:34,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55305 conditions, 5267 events. 3187/5267 cut-off events. For 942734/942738 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32823 event pairs, 639 based on Foata normal form. 5/5244 useless extension candidates. Maximal degree in co-relation 55160. Up to 4409 conditions per place. [2024-06-21 20:46:34,689 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 335 selfloop transitions, 32 changer transitions 0/462 dead transitions. [2024-06-21 20:46:34,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 462 transitions, 6843 flow [2024-06-21 20:46:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:46:34,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:46:34,691 INFO L175 Difference]: Start difference. First operand has 326 places, 448 transitions, 5987 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:46:34,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 462 transitions, 6843 flow [2024-06-21 20:46:36,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 462 transitions, 6671 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:46:36,103 INFO L231 Difference]: Finished difference. Result has 327 places, 451 transitions, 5981 flow [2024-06-21 20:46:36,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5815, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5981, PETRI_PLACES=327, PETRI_TRANSITIONS=451} [2024-06-21 20:46:36,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-21 20:46:36,104 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 451 transitions, 5981 flow [2024-06-21 20:46:36,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:36,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:36,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:36,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:46:36,104 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:36,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash -236090444, now seen corresponding path program 3 times [2024-06-21 20:46:36,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:36,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125245569] [2024-06-21 20:46:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:36,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:37,227 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 20:46:37,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:37,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125245569] [2024-06-21 20:46:37,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125245569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:37,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:37,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:37,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860890371] [2024-06-21 20:46:37,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:37,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:37,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:37,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:46:37,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 451 transitions, 5981 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:37,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:37,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:46:37,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:38,548 INFO L124 PetriNetUnfolderBase]: 3173/5237 cut-off events. [2024-06-21 20:46:38,549 INFO L125 PetriNetUnfolderBase]: For 972047/972055 co-relation queries the response was YES. [2024-06-21 20:46:38,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55494 conditions, 5237 events. 3173/5237 cut-off events. For 972047/972055 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32600 event pairs, 758 based on Foata normal form. 10/5215 useless extension candidates. Maximal degree in co-relation 55349. Up to 4441 conditions per place. [2024-06-21 20:46:38,624 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 350 selfloop transitions, 20 changer transitions 0/465 dead transitions. [2024-06-21 20:46:38,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 465 transitions, 6847 flow [2024-06-21 20:46:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:46:38,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:46:38,625 INFO L175 Difference]: Start difference. First operand has 327 places, 451 transitions, 5981 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:46:38,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 465 transitions, 6847 flow [2024-06-21 20:46:39,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 465 transitions, 6703 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:39,998 INFO L231 Difference]: Finished difference. Result has 329 places, 454 transitions, 5978 flow [2024-06-21 20:46:39,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5837, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5978, PETRI_PLACES=329, PETRI_TRANSITIONS=454} [2024-06-21 20:46:39,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-21 20:46:39,998 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 454 transitions, 5978 flow [2024-06-21 20:46:39,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:39,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:39,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:39,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:46:39,999 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:39,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:39,999 INFO L85 PathProgramCache]: Analyzing trace with hash 732317157, now seen corresponding path program 4 times [2024-06-21 20:46:39,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:39,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715185513] [2024-06-21 20:46:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:39,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:41,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:41,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715185513] [2024-06-21 20:46:41,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715185513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:41,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:41,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:41,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650434960] [2024-06-21 20:46:41,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:41,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:41,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:41,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:41,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:41,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 454 transitions, 5978 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:46:41,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:41,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:41,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:42,319 INFO L124 PetriNetUnfolderBase]: 3526/5651 cut-off events. [2024-06-21 20:46:42,319 INFO L125 PetriNetUnfolderBase]: For 982876/982880 co-relation queries the response was YES. [2024-06-21 20:46:42,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58074 conditions, 5651 events. 3526/5651 cut-off events. For 982876/982880 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33896 event pairs, 705 based on Foata normal form. 5/5646 useless extension candidates. Maximal degree in co-relation 57928. Up to 4931 conditions per place. [2024-06-21 20:46:42,401 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 60 changer transitions 0/473 dead transitions. [2024-06-21 20:46:42,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 473 transitions, 7228 flow [2024-06-21 20:46:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:46:42,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:46:42,402 INFO L175 Difference]: Start difference. First operand has 329 places, 454 transitions, 5978 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:46:42,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 473 transitions, 7228 flow [2024-06-21 20:46:44,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 473 transitions, 7121 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:44,053 INFO L231 Difference]: Finished difference. Result has 331 places, 460 transitions, 6199 flow [2024-06-21 20:46:44,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5871, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6199, PETRI_PLACES=331, PETRI_TRANSITIONS=460} [2024-06-21 20:46:44,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-21 20:46:44,054 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 460 transitions, 6199 flow [2024-06-21 20:46:44,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:46:44,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:44,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:44,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:46:44,054 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:44,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:44,054 INFO L85 PathProgramCache]: Analyzing trace with hash 717571604, now seen corresponding path program 4 times [2024-06-21 20:46:44,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:44,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182427312] [2024-06-21 20:46:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:44,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:45,021 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 20:46:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182427312] [2024-06-21 20:46:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182427312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:45,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:45,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:45,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994426754] [2024-06-21 20:46:45,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:45,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:45,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:45,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:45,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 460 transitions, 6199 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 20:46:45,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:45,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:45,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:46,274 INFO L124 PetriNetUnfolderBase]: 3515/5637 cut-off events. [2024-06-21 20:46:46,274 INFO L125 PetriNetUnfolderBase]: For 998360/998361 co-relation queries the response was YES. [2024-06-21 20:46:46,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58174 conditions, 5637 events. 3515/5637 cut-off events. For 998360/998361 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33798 event pairs, 710 based on Foata normal form. 3/5627 useless extension candidates. Maximal degree in co-relation 58027. Up to 4915 conditions per place. [2024-06-21 20:46:46,359 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 361 selfloop transitions, 55 changer transitions 0/477 dead transitions. [2024-06-21 20:46:46,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 477 transitions, 7186 flow [2024-06-21 20:46:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:46:46,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 20:46:46,360 INFO L175 Difference]: Start difference. First operand has 331 places, 460 transitions, 6199 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:46:46,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 477 transitions, 7186 flow [2024-06-21 20:46:48,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 477 transitions, 7043 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 20:46:48,262 INFO L231 Difference]: Finished difference. Result has 337 places, 465 transitions, 6298 flow [2024-06-21 20:46:48,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6057, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6298, PETRI_PLACES=337, PETRI_TRANSITIONS=465} [2024-06-21 20:46:48,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-21 20:46:48,263 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 465 transitions, 6298 flow [2024-06-21 20:46:48,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 20:46:48,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:48,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:48,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:46:48,263 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:48,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash -307329292, now seen corresponding path program 4 times [2024-06-21 20:46:48,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:48,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273845763] [2024-06-21 20:46:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:48,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:49,338 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 20:46:49,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:49,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273845763] [2024-06-21 20:46:49,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273845763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:49,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:49,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:49,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255726496] [2024-06-21 20:46:49,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:49,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:49,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:49,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:46:49,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 465 transitions, 6298 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:49,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:49,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:46:49,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:50,572 INFO L124 PetriNetUnfolderBase]: 3197/5273 cut-off events. [2024-06-21 20:46:50,572 INFO L125 PetriNetUnfolderBase]: For 1010977/1010981 co-relation queries the response was YES. [2024-06-21 20:46:50,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56952 conditions, 5273 events. 3197/5273 cut-off events. For 1010977/1010981 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32684 event pairs, 628 based on Foata normal form. 5/5250 useless extension candidates. Maximal degree in co-relation 56802. Up to 4396 conditions per place. [2024-06-21 20:46:50,650 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 335 selfloop transitions, 54 changer transitions 0/486 dead transitions. [2024-06-21 20:46:50,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 486 transitions, 7540 flow [2024-06-21 20:46:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:46:50,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:46:50,651 INFO L175 Difference]: Start difference. First operand has 337 places, 465 transitions, 6298 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:46:50,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 486 transitions, 7540 flow [2024-06-21 20:46:52,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 486 transitions, 7367 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 20:46:52,656 INFO L231 Difference]: Finished difference. Result has 341 places, 474 transitions, 6495 flow [2024-06-21 20:46:52,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6125, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6495, PETRI_PLACES=341, PETRI_TRANSITIONS=474} [2024-06-21 20:46:52,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-21 20:46:52,656 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 474 transitions, 6495 flow [2024-06-21 20:46:52,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:52,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:52,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:52,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:46:52,657 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:52,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash -322061887, now seen corresponding path program 5 times [2024-06-21 20:46:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:52,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190690961] [2024-06-21 20:46:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:52,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:53,691 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 20:46:53,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:53,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190690961] [2024-06-21 20:46:53,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190690961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:53,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:53,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034717805] [2024-06-21 20:46:53,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:53,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:53,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:53,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 474 transitions, 6495 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:46:53,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:53,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:53,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:54,933 INFO L124 PetriNetUnfolderBase]: 3530/5657 cut-off events. [2024-06-21 20:46:54,933 INFO L125 PetriNetUnfolderBase]: For 1036720/1036724 co-relation queries the response was YES. [2024-06-21 20:46:54,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59336 conditions, 5657 events. 3530/5657 cut-off events. For 1036720/1036724 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33891 event pairs, 704 based on Foata normal form. 5/5652 useless extension candidates. Maximal degree in co-relation 59183. Up to 4963 conditions per place. [2024-06-21 20:46:55,016 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 386 selfloop transitions, 43 changer transitions 0/490 dead transitions. [2024-06-21 20:46:55,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 490 transitions, 7692 flow [2024-06-21 20:46:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:46:55,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:46:55,017 INFO L175 Difference]: Start difference. First operand has 341 places, 474 transitions, 6495 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:46:55,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 490 transitions, 7692 flow [2024-06-21 20:46:56,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 490 transitions, 7538 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-21 20:46:56,675 INFO L231 Difference]: Finished difference. Result has 346 places, 477 transitions, 6533 flow [2024-06-21 20:46:56,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6533, PETRI_PLACES=346, PETRI_TRANSITIONS=477} [2024-06-21 20:46:56,676 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-21 20:46:56,676 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 477 transitions, 6533 flow [2024-06-21 20:46:56,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:46:56,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:56,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:56,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:46:56,676 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:56,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:56,677 INFO L85 PathProgramCache]: Analyzing trace with hash -322074907, now seen corresponding path program 6 times [2024-06-21 20:46:56,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:56,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044077796] [2024-06-21 20:46:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:56,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:57,696 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 20:46:57,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:57,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044077796] [2024-06-21 20:46:57,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044077796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:57,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:57,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677857289] [2024-06-21 20:46:57,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:57,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:57,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:57,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:57,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 477 transitions, 6533 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:46:57,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:57,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:57,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:58,973 INFO L124 PetriNetUnfolderBase]: 3527/5653 cut-off events. [2024-06-21 20:46:58,973 INFO L125 PetriNetUnfolderBase]: For 1050608/1050612 co-relation queries the response was YES. [2024-06-21 20:46:59,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59372 conditions, 5653 events. 3527/5653 cut-off events. For 1050608/1050612 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33856 event pairs, 704 based on Foata normal form. 5/5648 useless extension candidates. Maximal degree in co-relation 59217. Up to 4966 conditions per place. [2024-06-21 20:46:59,054 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 390 selfloop transitions, 38 changer transitions 0/489 dead transitions. [2024-06-21 20:46:59,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 489 transitions, 7432 flow [2024-06-21 20:46:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:46:59,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 20:46:59,055 INFO L175 Difference]: Start difference. First operand has 346 places, 477 transitions, 6533 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:46:59,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 489 transitions, 7432 flow [2024-06-21 20:47:00,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 489 transitions, 7147 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:00,779 INFO L231 Difference]: Finished difference. Result has 348 places, 477 transitions, 6330 flow [2024-06-21 20:47:00,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6330, PETRI_PLACES=348, PETRI_TRANSITIONS=477} [2024-06-21 20:47:00,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-21 20:47:00,780 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 477 transitions, 6330 flow [2024-06-21 20:47:00,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:47:00,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:00,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:00,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:47:00,781 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:00,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:00,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1183008394, now seen corresponding path program 21 times [2024-06-21 20:47:00,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:00,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463924462] [2024-06-21 20:47:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:00,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:01,764 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 20:47:01,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463924462] [2024-06-21 20:47:01,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463924462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:01,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:01,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:47:01,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049716724] [2024-06-21 20:47:01,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:01,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:47:01,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:47:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:47:01,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:01,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 477 transitions, 6330 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:01,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:01,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:01,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:03,585 INFO L124 PetriNetUnfolderBase]: 4246/6687 cut-off events. [2024-06-21 20:47:03,586 INFO L125 PetriNetUnfolderBase]: For 1080800/1080804 co-relation queries the response was YES. [2024-06-21 20:47:03,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68000 conditions, 6687 events. 4246/6687 cut-off events. For 1080800/1080804 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40330 event pairs, 741 based on Foata normal form. 8/6693 useless extension candidates. Maximal degree in co-relation 67844. Up to 5535 conditions per place. [2024-06-21 20:47:03,686 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 386 selfloop transitions, 328 changer transitions 0/719 dead transitions. [2024-06-21 20:47:03,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 719 transitions, 11301 flow [2024-06-21 20:47:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:47:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:47:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:47:03,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 20:47:03,689 INFO L175 Difference]: Start difference. First operand has 348 places, 477 transitions, 6330 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:47:03,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 719 transitions, 11301 flow [2024-06-21 20:47:06,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 719 transitions, 11173 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:47:06,344 INFO L231 Difference]: Finished difference. Result has 355 places, 659 transitions, 10368 flow [2024-06-21 20:47:06,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10368, PETRI_PLACES=355, PETRI_TRANSITIONS=659} [2024-06-21 20:47:06,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-21 20:47:06,345 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 659 transitions, 10368 flow [2024-06-21 20:47:06,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:06,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:06,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:06,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:47:06,345 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:06,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1555224122, now seen corresponding path program 22 times [2024-06-21 20:47:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:06,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377915022] [2024-06-21 20:47:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:06,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:07,407 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 20:47:07,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:07,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377915022] [2024-06-21 20:47:07,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377915022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:07,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:07,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:47:07,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746670021] [2024-06-21 20:47:07,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:07,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:47:07,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:47:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:47:07,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:07,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 659 transitions, 10368 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:07,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:07,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:07,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:09,466 INFO L124 PetriNetUnfolderBase]: 4369/6883 cut-off events. [2024-06-21 20:47:09,466 INFO L125 PetriNetUnfolderBase]: For 1110673/1110679 co-relation queries the response was YES. [2024-06-21 20:47:09,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72060 conditions, 6883 events. 4369/6883 cut-off events. For 1110673/1110679 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41720 event pairs, 748 based on Foata normal form. 10/6891 useless extension candidates. Maximal degree in co-relation 71900. Up to 5664 conditions per place. [2024-06-21 20:47:09,575 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 368 selfloop transitions, 379 changer transitions 0/752 dead transitions. [2024-06-21 20:47:09,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 752 transitions, 12926 flow [2024-06-21 20:47:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:47:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:47:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:47:09,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 20:47:09,576 INFO L175 Difference]: Start difference. First operand has 355 places, 659 transitions, 10368 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:47:09,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 752 transitions, 12926 flow [2024-06-21 20:47:12,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 752 transitions, 12437 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 20:47:12,143 INFO L231 Difference]: Finished difference. Result has 364 places, 704 transitions, 11789 flow [2024-06-21 20:47:12,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9969, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11789, PETRI_PLACES=364, PETRI_TRANSITIONS=704} [2024-06-21 20:47:12,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-21 20:47:12,144 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 704 transitions, 11789 flow [2024-06-21 20:47:12,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:12,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:12,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:12,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:47:12,144 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:12,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash 611410792, now seen corresponding path program 23 times [2024-06-21 20:47:12,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:12,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624295965] [2024-06-21 20:47:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:13,117 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 20:47:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624295965] [2024-06-21 20:47:13,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624295965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:13,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:13,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:47:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088865909] [2024-06-21 20:47:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:47:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:47:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:47:13,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:13,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 704 transitions, 11789 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:13,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:13,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:13,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:15,323 INFO L124 PetriNetUnfolderBase]: 4467/7038 cut-off events. [2024-06-21 20:47:15,323 INFO L125 PetriNetUnfolderBase]: For 1137353/1137355 co-relation queries the response was YES. [2024-06-21 20:47:15,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74821 conditions, 7038 events. 4467/7038 cut-off events. For 1137353/1137355 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42970 event pairs, 774 based on Foata normal form. 6/7042 useless extension candidates. Maximal degree in co-relation 74658. Up to 5771 conditions per place. [2024-06-21 20:47:15,422 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 411 selfloop transitions, 375 changer transitions 0/791 dead transitions. [2024-06-21 20:47:15,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 791 transitions, 14434 flow [2024-06-21 20:47:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:47:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:47:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:47:15,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 20:47:15,423 INFO L175 Difference]: Start difference. First operand has 364 places, 704 transitions, 11789 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:47:15,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 791 transitions, 14434 flow [2024-06-21 20:47:17,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 791 transitions, 13872 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 20:47:17,763 INFO L231 Difference]: Finished difference. Result has 373 places, 738 transitions, 12985 flow [2024-06-21 20:47:17,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11265, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12985, PETRI_PLACES=373, PETRI_TRANSITIONS=738} [2024-06-21 20:47:17,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-21 20:47:17,763 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 738 transitions, 12985 flow [2024-06-21 20:47:17,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:17,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:17,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:17,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:47:17,764 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:17,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1118766134, now seen corresponding path program 24 times [2024-06-21 20:47:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:17,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990422744] [2024-06-21 20:47:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:18,701 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 20:47:18,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990422744] [2024-06-21 20:47:18,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990422744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:18,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:18,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:47:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245191800] [2024-06-21 20:47:18,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:47:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:47:18,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:47:18,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:18,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 738 transitions, 12985 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:18,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:18,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:18,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:20,910 INFO L124 PetriNetUnfolderBase]: 4776/7527 cut-off events. [2024-06-21 20:47:20,910 INFO L125 PetriNetUnfolderBase]: For 1169981/1169987 co-relation queries the response was YES. [2024-06-21 20:47:20,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80633 conditions, 7527 events. 4776/7527 cut-off events. For 1169981/1169987 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 46469 event pairs, 817 based on Foata normal form. 10/7535 useless extension candidates. Maximal degree in co-relation 80466. Up to 6038 conditions per place. [2024-06-21 20:47:21,033 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 427 selfloop transitions, 475 changer transitions 0/907 dead transitions. [2024-06-21 20:47:21,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 907 transitions, 17751 flow [2024-06-21 20:47:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:47:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:47:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:47:21,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 20:47:21,034 INFO L175 Difference]: Start difference. First operand has 373 places, 738 transitions, 12985 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:47:21,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 907 transitions, 17751 flow [2024-06-21 20:47:23,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 907 transitions, 17034 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 20:47:23,751 INFO L231 Difference]: Finished difference. Result has 383 places, 851 transitions, 16150 flow [2024-06-21 20:47:23,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12417, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16150, PETRI_PLACES=383, PETRI_TRANSITIONS=851} [2024-06-21 20:47:23,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-21 20:47:23,752 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 851 transitions, 16150 flow [2024-06-21 20:47:23,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:23,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:23,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:23,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:47:23,752 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:23,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:23,753 INFO L85 PathProgramCache]: Analyzing trace with hash -953127000, now seen corresponding path program 25 times [2024-06-21 20:47:23,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:23,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633152077] [2024-06-21 20:47:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:24,699 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 20:47:24,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:24,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633152077] [2024-06-21 20:47:24,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633152077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:24,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:24,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:47:24,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515473663] [2024-06-21 20:47:24,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:24,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:47:24,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:47:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:47:24,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:24,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 851 transitions, 16150 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:24,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:24,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:24,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:26,980 INFO L124 PetriNetUnfolderBase]: 4790/7549 cut-off events. [2024-06-21 20:47:26,980 INFO L125 PetriNetUnfolderBase]: For 1180271/1180277 co-relation queries the response was YES. [2024-06-21 20:47:27,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81583 conditions, 7549 events. 4790/7549 cut-off events. For 1180271/1180277 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 46596 event pairs, 823 based on Foata normal form. 10/7557 useless extension candidates. Maximal degree in co-relation 81411. Up to 6067 conditions per place. [2024-06-21 20:47:27,291 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 448 selfloop transitions, 459 changer transitions 0/912 dead transitions. [2024-06-21 20:47:27,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 912 transitions, 18445 flow [2024-06-21 20:47:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:47:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:47:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 20:47:27,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:47:27,292 INFO L175 Difference]: Start difference. First operand has 383 places, 851 transitions, 16150 flow. Second operand 11 states and 220 transitions. [2024-06-21 20:47:27,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 912 transitions, 18445 flow [2024-06-21 20:47:29,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 912 transitions, 17849 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 20:47:29,466 INFO L231 Difference]: Finished difference. Result has 392 places, 859 transitions, 16767 flow [2024-06-21 20:47:29,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15554, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16767, PETRI_PLACES=392, PETRI_TRANSITIONS=859} [2024-06-21 20:47:29,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-21 20:47:29,467 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 859 transitions, 16767 flow [2024-06-21 20:47:29,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:29,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:29,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:29,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:47:29,467 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:29,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1763475206, now seen corresponding path program 26 times [2024-06-21 20:47:29,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:29,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144279651] [2024-06-21 20:47:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:29,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:30,416 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 20:47:30,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:30,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144279651] [2024-06-21 20:47:30,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144279651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:30,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:30,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:47:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169565976] [2024-06-21 20:47:30,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:30,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:47:30,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:47:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:47:30,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:47:30,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 859 transitions, 16767 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:30,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:30,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:47:30,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:32,872 INFO L124 PetriNetUnfolderBase]: 4963/7822 cut-off events. [2024-06-21 20:47:32,872 INFO L125 PetriNetUnfolderBase]: For 1191243/1191247 co-relation queries the response was YES. [2024-06-21 20:47:32,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83545 conditions, 7822 events. 4963/7822 cut-off events. For 1191243/1191247 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 48580 event pairs, 777 based on Foata normal form. 8/7828 useless extension candidates. Maximal degree in co-relation 83370. Up to 5687 conditions per place. [2024-06-21 20:47:32,997 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 402 selfloop transitions, 552 changer transitions 0/959 dead transitions. [2024-06-21 20:47:32,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 959 transitions, 19785 flow [2024-06-21 20:47:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:47:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:47:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:47:32,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 20:47:32,998 INFO L175 Difference]: Start difference. First operand has 392 places, 859 transitions, 16767 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:47:32,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 959 transitions, 19785 flow [2024-06-21 20:47:36,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 959 transitions, 18836 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 20:47:36,228 INFO L231 Difference]: Finished difference. Result has 398 places, 899 transitions, 17897 flow [2024-06-21 20:47:36,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15851, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17897, PETRI_PLACES=398, PETRI_TRANSITIONS=899} [2024-06-21 20:47:36,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-21 20:47:36,229 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 899 transitions, 17897 flow [2024-06-21 20:47:36,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:36,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:36,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:36,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:47:36,229 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:36,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:36,230 INFO L85 PathProgramCache]: Analyzing trace with hash -430780718, now seen corresponding path program 5 times [2024-06-21 20:47:36,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:36,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536497201] [2024-06-21 20:47:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:36,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:37,292 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 20:47:37,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:37,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536497201] [2024-06-21 20:47:37,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536497201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:37,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:37,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760237723] [2024-06-21 20:47:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:37,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:37,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:47:37,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 899 transitions, 17897 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:37,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:37,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:47:37,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:39,260 INFO L124 PetriNetUnfolderBase]: 4200/6970 cut-off events. [2024-06-21 20:47:39,260 INFO L125 PetriNetUnfolderBase]: For 1253891/1253919 co-relation queries the response was YES. [2024-06-21 20:47:39,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77434 conditions, 6970 events. 4200/6970 cut-off events. For 1253891/1253919 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 46353 event pairs, 825 based on Foata normal form. 28/6932 useless extension candidates. Maximal degree in co-relation 77256. Up to 5624 conditions per place. [2024-06-21 20:47:39,389 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 642 selfloop transitions, 36 changer transitions 0/928 dead transitions. [2024-06-21 20:47:39,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 928 transitions, 19405 flow [2024-06-21 20:47:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:47:39,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:47:39,391 INFO L175 Difference]: Start difference. First operand has 398 places, 899 transitions, 17897 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:47:39,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 928 transitions, 19405 flow [2024-06-21 20:47:43,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 928 transitions, 16638 flow, removed 70 selfloop flow, removed 11 redundant places. [2024-06-21 20:47:43,024 INFO L231 Difference]: Finished difference. Result has 399 places, 909 transitions, 15346 flow [2024-06-21 20:47:43,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15131, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=863, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15346, PETRI_PLACES=399, PETRI_TRANSITIONS=909} [2024-06-21 20:47:43,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-21 20:47:43,025 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 909 transitions, 15346 flow [2024-06-21 20:47:43,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:43,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:43,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:43,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:47:43,026 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:43,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash 525760251, now seen corresponding path program 1 times [2024-06-21 20:47:43,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:43,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241188129] [2024-06-21 20:47:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:43,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:44,275 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 20:47:44,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:44,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241188129] [2024-06-21 20:47:44,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241188129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:44,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:44,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:44,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760910964] [2024-06-21 20:47:44,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:44,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:44,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:44,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:47:44,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 909 transitions, 15346 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:44,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:44,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:47:44,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:46,407 INFO L124 PetriNetUnfolderBase]: 4480/7267 cut-off events. [2024-06-21 20:47:46,407 INFO L125 PetriNetUnfolderBase]: For 1282366/1282404 co-relation queries the response was YES. [2024-06-21 20:47:46,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74158 conditions, 7267 events. 4480/7267 cut-off events. For 1282366/1282404 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 46966 event pairs, 970 based on Foata normal form. 30/7170 useless extension candidates. Maximal degree in co-relation 73980. Up to 6401 conditions per place. [2024-06-21 20:47:46,525 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 820 selfloop transitions, 18 changer transitions 0/928 dead transitions. [2024-06-21 20:47:46,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 928 transitions, 17146 flow [2024-06-21 20:47:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:47:46,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:47:46,535 INFO L175 Difference]: Start difference. First operand has 399 places, 909 transitions, 15346 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:47:46,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 928 transitions, 17146 flow [2024-06-21 20:47:49,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 928 transitions, 17024 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:47:49,394 INFO L231 Difference]: Finished difference. Result has 400 places, 912 transitions, 15338 flow [2024-06-21 20:47:49,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15224, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15338, PETRI_PLACES=400, PETRI_TRANSITIONS=912} [2024-06-21 20:47:49,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-21 20:47:49,395 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 912 transitions, 15338 flow [2024-06-21 20:47:49,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:49,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:49,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:49,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:47:49,395 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:49,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:49,396 INFO L85 PathProgramCache]: Analyzing trace with hash -470898053, now seen corresponding path program 2 times [2024-06-21 20:47:49,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:49,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113611353] [2024-06-21 20:47:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:49,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:50,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113611353] [2024-06-21 20:47:50,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113611353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:50,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:50,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:50,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773885026] [2024-06-21 20:47:50,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:50,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:50,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:50,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:50,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:50,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:47:50,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 912 transitions, 15338 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:50,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:50,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:47:50,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:52,952 INFO L124 PetriNetUnfolderBase]: 4474/7263 cut-off events. [2024-06-21 20:47:52,952 INFO L125 PetriNetUnfolderBase]: For 1297571/1297617 co-relation queries the response was YES. [2024-06-21 20:47:53,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74491 conditions, 7263 events. 4474/7263 cut-off events. For 1297571/1297617 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 46962 event pairs, 968 based on Foata normal form. 29/7165 useless extension candidates. Maximal degree in co-relation 74312. Up to 6395 conditions per place. [2024-06-21 20:47:53,078 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 820 selfloop transitions, 19 changer transitions 0/929 dead transitions. [2024-06-21 20:47:53,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 929 transitions, 17144 flow [2024-06-21 20:47:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:47:53,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:47:53,079 INFO L175 Difference]: Start difference. First operand has 400 places, 912 transitions, 15338 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:47:53,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 929 transitions, 17144 flow [2024-06-21 20:47:55,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 929 transitions, 17030 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 20:47:55,982 INFO L231 Difference]: Finished difference. Result has 401 places, 915 transitions, 15346 flow [2024-06-21 20:47:55,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15224, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=893, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15346, PETRI_PLACES=401, PETRI_TRANSITIONS=915} [2024-06-21 20:47:55,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-21 20:47:55,983 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 915 transitions, 15346 flow [2024-06-21 20:47:55,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:55,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:55,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:55,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:47:55,983 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:55,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:55,983 INFO L85 PathProgramCache]: Analyzing trace with hash -314435143, now seen corresponding path program 3 times [2024-06-21 20:47:55,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:55,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294860487] [2024-06-21 20:47:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:55,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:57,280 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 20:47:57,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:57,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294860487] [2024-06-21 20:47:57,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294860487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:57,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:57,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:57,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397898811] [2024-06-21 20:47:57,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:57,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:57,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:57,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:57,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:57,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:47:57,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 915 transitions, 15346 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:57,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:57,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:47:57,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:59,386 INFO L124 PetriNetUnfolderBase]: 4479/7275 cut-off events. [2024-06-21 20:47:59,387 INFO L125 PetriNetUnfolderBase]: For 1323088/1323146 co-relation queries the response was YES. [2024-06-21 20:47:59,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75002 conditions, 7275 events. 4479/7275 cut-off events. For 1323088/1323146 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47120 event pairs, 970 based on Foata normal form. 34/7182 useless extension candidates. Maximal degree in co-relation 74823. Up to 6393 conditions per place. [2024-06-21 20:47:59,516 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 816 selfloop transitions, 24 changer transitions 0/930 dead transitions. [2024-06-21 20:47:59,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 930 transitions, 17158 flow [2024-06-21 20:47:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:47:59,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:47:59,517 INFO L175 Difference]: Start difference. First operand has 401 places, 915 transitions, 15346 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:47:59,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 930 transitions, 17158 flow [2024-06-21 20:48:02,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 930 transitions, 17058 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:02,776 INFO L231 Difference]: Finished difference. Result has 403 places, 918 transitions, 15384 flow [2024-06-21 20:48:02,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15246, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15384, PETRI_PLACES=403, PETRI_TRANSITIONS=918} [2024-06-21 20:48:02,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-21 20:48:02,776 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 918 transitions, 15384 flow [2024-06-21 20:48:02,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:02,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:02,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:02,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:48:02,777 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:02,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash 732563421, now seen corresponding path program 4 times [2024-06-21 20:48:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:02,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007138519] [2024-06-21 20:48:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:04,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:04,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007138519] [2024-06-21 20:48:04,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007138519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:04,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:04,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:04,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507954067] [2024-06-21 20:48:04,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:04,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:04,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:04,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:48:04,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 918 transitions, 15384 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:04,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:04,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:48:04,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:06,265 INFO L124 PetriNetUnfolderBase]: 4475/7269 cut-off events. [2024-06-21 20:48:06,265 INFO L125 PetriNetUnfolderBase]: For 1333394/1333444 co-relation queries the response was YES. [2024-06-21 20:48:06,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75205 conditions, 7269 events. 4475/7269 cut-off events. For 1333394/1333444 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47121 event pairs, 969 based on Foata normal form. 34/7177 useless extension candidates. Maximal degree in co-relation 75025. Up to 6368 conditions per place. [2024-06-21 20:48:06,385 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 806 selfloop transitions, 39 changer transitions 0/935 dead transitions. [2024-06-21 20:48:06,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 935 transitions, 17236 flow [2024-06-21 20:48:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:48:06,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:48:06,386 INFO L175 Difference]: Start difference. First operand has 403 places, 918 transitions, 15384 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:48:06,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 935 transitions, 17236 flow [2024-06-21 20:48:09,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 935 transitions, 17120 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:09,459 INFO L231 Difference]: Finished difference. Result has 406 places, 924 transitions, 15487 flow [2024-06-21 20:48:09,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15268, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15487, PETRI_PLACES=406, PETRI_TRANSITIONS=924} [2024-06-21 20:48:09,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-21 20:48:09,459 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 924 transitions, 15487 flow [2024-06-21 20:48:09,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:09,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:09,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:09,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:48:09,460 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:09,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash -306806446, now seen corresponding path program 1 times [2024-06-21 20:48:09,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:09,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422864567] [2024-06-21 20:48:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:11,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:11,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422864567] [2024-06-21 20:48:11,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422864567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:11,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:11,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:11,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470563583] [2024-06-21 20:48:11,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:11,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:11,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:11,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:11,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:11,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:48:11,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 924 transitions, 15487 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 20:48:11,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:11,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:48:11,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:13,092 INFO L124 PetriNetUnfolderBase]: 4198/6995 cut-off events. [2024-06-21 20:48:13,092 INFO L125 PetriNetUnfolderBase]: For 1347927/1347957 co-relation queries the response was YES. [2024-06-21 20:48:13,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72701 conditions, 6995 events. 4198/6995 cut-off events. For 1347927/1347957 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 46906 event pairs, 1003 based on Foata normal form. 30/6965 useless extension candidates. Maximal degree in co-relation 72519. Up to 5673 conditions per place. [2024-06-21 20:48:13,217 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 668 selfloop transitions, 20 changer transitions 0/938 dead transitions. [2024-06-21 20:48:13,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 938 transitions, 16985 flow [2024-06-21 20:48:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:48:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:48:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:48:13,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 20:48:13,218 INFO L175 Difference]: Start difference. First operand has 406 places, 924 transitions, 15487 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:48:13,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 938 transitions, 16985 flow [2024-06-21 20:48:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 938 transitions, 16844 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:15,910 INFO L231 Difference]: Finished difference. Result has 411 places, 926 transitions, 15483 flow [2024-06-21 20:48:15,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15346, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15483, PETRI_PLACES=411, PETRI_TRANSITIONS=926} [2024-06-21 20:48:15,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-21 20:48:15,911 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 926 transitions, 15483 flow [2024-06-21 20:48:15,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 20:48:15,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:15,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:15,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:48:15,911 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:15,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1630831002, now seen corresponding path program 1 times [2024-06-21 20:48:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:15,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127266178] [2024-06-21 20:48:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:15,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:16,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127266178] [2024-06-21 20:48:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127266178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:16,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767622338] [2024-06-21 20:48:16,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:16,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:16,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 926 transitions, 15483 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 20:48:16,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:16,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:16,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:19,165 INFO L124 PetriNetUnfolderBase]: 5004/7909 cut-off events. [2024-06-21 20:48:19,166 INFO L125 PetriNetUnfolderBase]: For 1308310/1308316 co-relation queries the response was YES. [2024-06-21 20:48:19,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79547 conditions, 7909 events. 5004/7909 cut-off events. For 1308310/1308316 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 49414 event pairs, 834 based on Foata normal form. 8/7916 useless extension candidates. Maximal degree in co-relation 79363. Up to 7306 conditions per place. [2024-06-21 20:48:19,283 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 858 selfloop transitions, 89 changer transitions 0/952 dead transitions. [2024-06-21 20:48:19,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 952 transitions, 17605 flow [2024-06-21 20:48:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:48:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:48:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:48:19,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 20:48:19,284 INFO L175 Difference]: Start difference. First operand has 411 places, 926 transitions, 15483 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:48:19,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 952 transitions, 17605 flow [2024-06-21 20:48:22,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 952 transitions, 17478 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 20:48:22,249 INFO L231 Difference]: Finished difference. Result has 413 places, 929 transitions, 15655 flow [2024-06-21 20:48:22,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15356, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15655, PETRI_PLACES=413, PETRI_TRANSITIONS=929} [2024-06-21 20:48:22,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-21 20:48:22,250 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 929 transitions, 15655 flow [2024-06-21 20:48:22,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 20:48:22,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:22,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:22,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:48:22,250 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:22,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1630681272, now seen corresponding path program 2 times [2024-06-21 20:48:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:22,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668609270] [2024-06-21 20:48:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:23,093 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 20:48:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668609270] [2024-06-21 20:48:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668609270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:23,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:23,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:23,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135711428] [2024-06-21 20:48:23,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:23,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:23,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 929 transitions, 15655 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:23,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:23,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:23,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:25,555 INFO L124 PetriNetUnfolderBase]: 5030/7943 cut-off events. [2024-06-21 20:48:25,555 INFO L125 PetriNetUnfolderBase]: For 1346550/1346556 co-relation queries the response was YES. [2024-06-21 20:48:25,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80947 conditions, 7943 events. 5030/7943 cut-off events. For 1346550/1346556 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49613 event pairs, 847 based on Foata normal form. 8/7950 useless extension candidates. Maximal degree in co-relation 80762. Up to 7290 conditions per place. [2024-06-21 20:48:25,683 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 860 selfloop transitions, 96 changer transitions 0/961 dead transitions. [2024-06-21 20:48:25,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 961 transitions, 18150 flow [2024-06-21 20:48:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:48:25,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:48:25,684 INFO L175 Difference]: Start difference. First operand has 413 places, 929 transitions, 15655 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:48:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 961 transitions, 18150 flow [2024-06-21 20:48:29,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 961 transitions, 17922 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:29,483 INFO L231 Difference]: Finished difference. Result has 417 places, 935 transitions, 15855 flow [2024-06-21 20:48:29,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15427, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15855, PETRI_PLACES=417, PETRI_TRANSITIONS=935} [2024-06-21 20:48:29,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-21 20:48:29,484 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 935 transitions, 15855 flow [2024-06-21 20:48:29,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:29,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:29,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:29,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:48:29,484 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:29,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:29,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1430108860, now seen corresponding path program 1 times [2024-06-21 20:48:29,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:29,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037764815] [2024-06-21 20:48:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:30,651 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 20:48:30,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:30,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037764815] [2024-06-21 20:48:30,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037764815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:30,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:30,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:48:30,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468637084] [2024-06-21 20:48:30,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:30,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:48:30,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:48:30,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:48:30,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:30,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 935 transitions, 15855 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:48:30,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:30,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:30,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:33,379 INFO L124 PetriNetUnfolderBase]: 5287/8414 cut-off events. [2024-06-21 20:48:33,379 INFO L125 PetriNetUnfolderBase]: For 1430425/1430425 co-relation queries the response was YES. [2024-06-21 20:48:33,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84061 conditions, 8414 events. 5287/8414 cut-off events. For 1430425/1430425 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 53799 event pairs, 881 based on Foata normal form. 12/8424 useless extension candidates. Maximal degree in co-relation 83875. Up to 5953 conditions per place. [2024-06-21 20:48:33,536 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 580 selfloop transitions, 419 changer transitions 0/1004 dead transitions. [2024-06-21 20:48:33,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1004 transitions, 18378 flow [2024-06-21 20:48:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:48:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:48:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-21 20:48:33,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:48:33,537 INFO L175 Difference]: Start difference. First operand has 417 places, 935 transitions, 15855 flow. Second operand 12 states and 236 transitions. [2024-06-21 20:48:33,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1004 transitions, 18378 flow [2024-06-21 20:48:37,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1004 transitions, 18225 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-21 20:48:37,203 INFO L231 Difference]: Finished difference. Result has 429 places, 958 transitions, 17000 flow [2024-06-21 20:48:37,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15702, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17000, PETRI_PLACES=429, PETRI_TRANSITIONS=958} [2024-06-21 20:48:37,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-21 20:48:37,204 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 958 transitions, 17000 flow [2024-06-21 20:48:37,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:48:37,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:37,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:37,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:48:37,204 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:37,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1831073168, now seen corresponding path program 2 times [2024-06-21 20:48:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:37,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346401529] [2024-06-21 20:48:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:38,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:38,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346401529] [2024-06-21 20:48:38,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346401529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:38,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:38,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:48:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402649265] [2024-06-21 20:48:38,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:38,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:48:38,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:48:38,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:48:38,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:38,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 958 transitions, 17000 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:48:38,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:38,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:38,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:41,191 INFO L124 PetriNetUnfolderBase]: 5397/8619 cut-off events. [2024-06-21 20:48:41,191 INFO L125 PetriNetUnfolderBase]: For 1471715/1471715 co-relation queries the response was YES. [2024-06-21 20:48:41,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87620 conditions, 8619 events. 5397/8619 cut-off events. For 1471715/1471715 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 55659 event pairs, 931 based on Foata normal form. 12/8629 useless extension candidates. Maximal degree in co-relation 87429. Up to 6252 conditions per place. [2024-06-21 20:48:41,336 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 610 selfloop transitions, 400 changer transitions 0/1015 dead transitions. [2024-06-21 20:48:41,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1015 transitions, 19505 flow [2024-06-21 20:48:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:48:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:48:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-21 20:48:41,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 20:48:41,338 INFO L175 Difference]: Start difference. First operand has 429 places, 958 transitions, 17000 flow. Second operand 12 states and 237 transitions. [2024-06-21 20:48:41,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1015 transitions, 19505 flow [2024-06-21 20:48:44,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1015 transitions, 19032 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:44,830 INFO L231 Difference]: Finished difference. Result has 439 places, 966 transitions, 17551 flow [2024-06-21 20:48:44,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16532, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17551, PETRI_PLACES=439, PETRI_TRANSITIONS=966} [2024-06-21 20:48:44,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-21 20:48:44,831 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 966 transitions, 17551 flow [2024-06-21 20:48:44,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:48:44,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:44,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:48:44,832 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:44,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash -748876958, now seen corresponding path program 3 times [2024-06-21 20:48:44,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:44,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395008082] [2024-06-21 20:48:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:44,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:45,959 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 20:48:45,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395008082] [2024-06-21 20:48:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395008082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:45,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:45,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:48:45,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764998383] [2024-06-21 20:48:45,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:45,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:48:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:48:45,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:48:46,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:46,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 966 transitions, 17551 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:48:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:48,771 INFO L124 PetriNetUnfolderBase]: 5622/9027 cut-off events. [2024-06-21 20:48:48,771 INFO L125 PetriNetUnfolderBase]: For 1576250/1576252 co-relation queries the response was YES. [2024-06-21 20:48:48,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92367 conditions, 9027 events. 5622/9027 cut-off events. For 1576250/1576252 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59057 event pairs, 863 based on Foata normal form. 14/9039 useless extension candidates. Maximal degree in co-relation 92173. Up to 5409 conditions per place. [2024-06-21 20:48:48,921 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 576 selfloop transitions, 456 changer transitions 0/1037 dead transitions. [2024-06-21 20:48:48,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1037 transitions, 20667 flow [2024-06-21 20:48:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:48:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:48:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-21 20:48:48,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47357293868921774 [2024-06-21 20:48:48,922 INFO L175 Difference]: Start difference. First operand has 439 places, 966 transitions, 17551 flow. Second operand 11 states and 224 transitions. [2024-06-21 20:48:48,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1037 transitions, 20667 flow [2024-06-21 20:48:52,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1037 transitions, 20039 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:52,516 INFO L231 Difference]: Finished difference. Result has 447 places, 978 transitions, 18328 flow [2024-06-21 20:48:52,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16939, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18328, PETRI_PLACES=447, PETRI_TRANSITIONS=978} [2024-06-21 20:48:52,516 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-21 20:48:52,516 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 978 transitions, 18328 flow [2024-06-21 20:48:52,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:48:52,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:52,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:52,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:48:52,517 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:52,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash -454876332, now seen corresponding path program 4 times [2024-06-21 20:48:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:52,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516260213] [2024-06-21 20:48:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:52,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:53,738 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 20:48:53,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:53,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516260213] [2024-06-21 20:48:53,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516260213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:53,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:53,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:48:53,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254888707] [2024-06-21 20:48:53,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:53,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:48:53,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:48:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:48:53,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:53,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 978 transitions, 18328 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:48:53,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:53,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:53,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:56,931 INFO L124 PetriNetUnfolderBase]: 5732/9217 cut-off events. [2024-06-21 20:48:56,931 INFO L125 PetriNetUnfolderBase]: For 1614700/1614702 co-relation queries the response was YES. [2024-06-21 20:48:57,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94799 conditions, 9217 events. 5732/9217 cut-off events. For 1614700/1614702 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 60822 event pairs, 921 based on Foata normal form. 14/9229 useless extension candidates. Maximal degree in co-relation 94602. Up to 6716 conditions per place. [2024-06-21 20:48:57,123 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 600 selfloop transitions, 436 changer transitions 0/1041 dead transitions. [2024-06-21 20:48:57,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1041 transitions, 20945 flow [2024-06-21 20:48:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:48:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:48:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-21 20:48:57,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-21 20:48:57,125 INFO L175 Difference]: Start difference. First operand has 447 places, 978 transitions, 18328 flow. Second operand 11 states and 223 transitions. [2024-06-21 20:48:57,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1041 transitions, 20945 flow [2024-06-21 20:49:03,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1041 transitions, 20565 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 20:49:03,703 INFO L231 Difference]: Finished difference. Result has 455 places, 984 transitions, 19091 flow [2024-06-21 20:49:03,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17960, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19091, PETRI_PLACES=455, PETRI_TRANSITIONS=984} [2024-06-21 20:49:03,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-21 20:49:03,704 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 984 transitions, 19091 flow [2024-06-21 20:49:03,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:49:03,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:03,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:03,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:49:03,705 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:03,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash -843783394, now seen corresponding path program 1 times [2024-06-21 20:49:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:03,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856967981] [2024-06-21 20:49:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:03,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:04,645 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 20:49:04,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:04,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856967981] [2024-06-21 20:49:04,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856967981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:04,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:04,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:04,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342079700] [2024-06-21 20:49:04,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:04,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:04,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:49:04,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 984 transitions, 19091 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 20:49:04,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:04,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:49:04,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:07,385 INFO L124 PetriNetUnfolderBase]: 5361/8743 cut-off events. [2024-06-21 20:49:07,385 INFO L125 PetriNetUnfolderBase]: For 1680950/1680983 co-relation queries the response was YES. [2024-06-21 20:49:07,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93064 conditions, 8743 events. 5361/8743 cut-off events. For 1680950/1680983 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 58918 event pairs, 1105 based on Foata normal form. 33/8637 useless extension candidates. Maximal degree in co-relation 92863. Up to 7775 conditions per place. [2024-06-21 20:49:07,554 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 868 selfloop transitions, 62 changer transitions 0/1010 dead transitions. [2024-06-21 20:49:07,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1010 transitions, 21171 flow [2024-06-21 20:49:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:49:07,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 20:49:07,555 INFO L175 Difference]: Start difference. First operand has 455 places, 984 transitions, 19091 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:49:07,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1010 transitions, 21171 flow [2024-06-21 20:49:12,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1010 transitions, 20340 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:12,957 INFO L231 Difference]: Finished difference. Result has 456 places, 987 transitions, 18517 flow [2024-06-21 20:49:12,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18260, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18517, PETRI_PLACES=456, PETRI_TRANSITIONS=987} [2024-06-21 20:49:12,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-21 20:49:12,957 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 987 transitions, 18517 flow [2024-06-21 20:49:12,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 20:49:12,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:12,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:12,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:49:12,958 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:12,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:12,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1458341112, now seen corresponding path program 3 times [2024-06-21 20:49:12,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:12,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999293164] [2024-06-21 20:49:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:12,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:13,837 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 20:49:13,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:13,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999293164] [2024-06-21 20:49:13,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999293164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:13,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:13,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:13,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608637027] [2024-06-21 20:49:13,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:13,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:13,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:13,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:13,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:13,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:49:13,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 987 transitions, 18517 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 20:49:13,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:13,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:49:13,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:16,926 INFO L124 PetriNetUnfolderBase]: 5747/9264 cut-off events. [2024-06-21 20:49:16,926 INFO L125 PetriNetUnfolderBase]: For 1604447/1604453 co-relation queries the response was YES. [2024-06-21 20:49:17,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95288 conditions, 9264 events. 5747/9264 cut-off events. For 1604447/1604453 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61344 event pairs, 928 based on Foata normal form. 8/9271 useless extension candidates. Maximal degree in co-relation 95087. Up to 8533 conditions per place. [2024-06-21 20:49:17,071 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 922 selfloop transitions, 87 changer transitions 0/1014 dead transitions. [2024-06-21 20:49:17,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1014 transitions, 20784 flow [2024-06-21 20:49:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:49:17,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 20:49:17,073 INFO L175 Difference]: Start difference. First operand has 456 places, 987 transitions, 18517 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:49:17,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1014 transitions, 20784 flow [2024-06-21 20:49:21,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1014 transitions, 20555 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:21,080 INFO L231 Difference]: Finished difference. Result has 459 places, 990 transitions, 18579 flow [2024-06-21 20:49:21,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18288, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=900, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18579, PETRI_PLACES=459, PETRI_TRANSITIONS=990} [2024-06-21 20:49:21,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-21 20:49:21,081 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 990 transitions, 18579 flow [2024-06-21 20:49:21,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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 20:49:21,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:21,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:21,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:49:21,081 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:21,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2050805180, now seen corresponding path program 4 times [2024-06-21 20:49:21,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:21,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574157123] [2024-06-21 20:49:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:21,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:21,861 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 20:49:21,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:21,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574157123] [2024-06-21 20:49:21,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574157123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:21,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:21,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:21,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344478783] [2024-06-21 20:49:21,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:21,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:21,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:21,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:21,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:49:21,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 990 transitions, 18579 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:21,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:21,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:49:21,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:24,700 INFO L124 PetriNetUnfolderBase]: 5773/9298 cut-off events. [2024-06-21 20:49:24,701 INFO L125 PetriNetUnfolderBase]: For 1647660/1647666 co-relation queries the response was YES. [2024-06-21 20:49:24,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96304 conditions, 9298 events. 5773/9298 cut-off events. For 1647660/1647666 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 61466 event pairs, 1025 based on Foata normal form. 8/9305 useless extension candidates. Maximal degree in co-relation 96102. Up to 8518 conditions per place. [2024-06-21 20:49:24,889 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 920 selfloop transitions, 98 changer transitions 0/1023 dead transitions. [2024-06-21 20:49:24,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1023 transitions, 21255 flow [2024-06-21 20:49:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:49:24,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:49:24,890 INFO L175 Difference]: Start difference. First operand has 459 places, 990 transitions, 18579 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:49:24,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1023 transitions, 21255 flow [2024-06-21 20:49:30,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1023 transitions, 21070 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 20:49:30,184 INFO L231 Difference]: Finished difference. Result has 464 places, 996 transitions, 18868 flow [2024-06-21 20:49:30,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18394, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=892, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18868, PETRI_PLACES=464, PETRI_TRANSITIONS=996} [2024-06-21 20:49:30,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-21 20:49:30,185 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 996 transitions, 18868 flow [2024-06-21 20:49:30,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:30,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:30,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:30,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:49:30,186 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:30,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1457982628, now seen corresponding path program 1 times [2024-06-21 20:49:30,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:30,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778779668] [2024-06-21 20:49:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:30,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:31,051 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 20:49:31,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:31,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778779668] [2024-06-21 20:49:31,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778779668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:31,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:31,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:31,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723238162] [2024-06-21 20:49:31,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:31,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:31,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:31,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:49:31,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 996 transitions, 18868 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:49:31,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:31,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:49:31,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:33,710 INFO L124 PetriNetUnfolderBase]: 5400/8809 cut-off events. [2024-06-21 20:49:33,710 INFO L125 PetriNetUnfolderBase]: For 1766905/1766939 co-relation queries the response was YES. [2024-06-21 20:49:33,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94079 conditions, 8809 events. 5400/8809 cut-off events. For 1766905/1766939 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 59470 event pairs, 1068 based on Foata normal form. 35/8708 useless extension candidates. Maximal degree in co-relation 93875. Up to 7878 conditions per place. [2024-06-21 20:49:33,880 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 897 selfloop transitions, 41 changer transitions 0/1021 dead transitions. [2024-06-21 20:49:33,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 1021 transitions, 20960 flow [2024-06-21 20:49:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:49:33,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:49:33,881 INFO L175 Difference]: Start difference. First operand has 464 places, 996 transitions, 18868 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:49:33,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 1021 transitions, 20960 flow [2024-06-21 20:49:38,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1021 transitions, 20684 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 20:49:38,819 INFO L231 Difference]: Finished difference. Result has 467 places, 1000 transitions, 18803 flow [2024-06-21 20:49:38,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18592, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18803, PETRI_PLACES=467, PETRI_TRANSITIONS=1000} [2024-06-21 20:49:38,819 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-21 20:49:38,819 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 1000 transitions, 18803 flow [2024-06-21 20:49:38,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:49:38,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:38,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:38,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:49:38,820 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:38,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2067210086, now seen corresponding path program 5 times [2024-06-21 20:49:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:38,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294785920] [2024-06-21 20:49:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:39,636 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 20:49:39,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294785920] [2024-06-21 20:49:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294785920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:39,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:39,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:39,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046513999] [2024-06-21 20:49:39,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:39,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:39,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:39,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:49:39,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 1000 transitions, 18803 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:39,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:39,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:49:39,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:42,796 INFO L124 PetriNetUnfolderBase]: 5809/9354 cut-off events. [2024-06-21 20:49:42,796 INFO L125 PetriNetUnfolderBase]: For 1720283/1720289 co-relation queries the response was YES. [2024-06-21 20:49:42,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98475 conditions, 9354 events. 5809/9354 cut-off events. For 1720283/1720289 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 61947 event pairs, 1024 based on Foata normal form. 8/9361 useless extension candidates. Maximal degree in co-relation 98270. Up to 8481 conditions per place. [2024-06-21 20:49:42,973 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 906 selfloop transitions, 118 changer transitions 0/1029 dead transitions. [2024-06-21 20:49:42,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1029 transitions, 21736 flow [2024-06-21 20:49:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:49:42,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:49:42,974 INFO L175 Difference]: Start difference. First operand has 467 places, 1000 transitions, 18803 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:49:42,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1029 transitions, 21736 flow [2024-06-21 20:49:49,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1029 transitions, 21553 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:49,014 INFO L231 Difference]: Finished difference. Result has 469 places, 1006 transitions, 19128 flow [2024-06-21 20:49:49,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18620, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=885, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19128, PETRI_PLACES=469, PETRI_TRANSITIONS=1006} [2024-06-21 20:49:49,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-21 20:49:49,015 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1006 transitions, 19128 flow [2024-06-21 20:49:49,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:49,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:49,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:49,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:49:49,016 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:49,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -666409888, now seen corresponding path program 2 times [2024-06-21 20:49:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:49,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989281478] [2024-06-21 20:49:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:49,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:50,049 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 20:49:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:50,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989281478] [2024-06-21 20:49:50,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989281478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:50,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:50,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229382912] [2024-06-21 20:49:50,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:50,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:50,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:50,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:50,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:50,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:49:50,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1006 transitions, 19128 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:49:50,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:50,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:49:50,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:53,099 INFO L124 PetriNetUnfolderBase]: 5443/8881 cut-off events. [2024-06-21 20:49:53,099 INFO L125 PetriNetUnfolderBase]: For 1839813/1839845 co-relation queries the response was YES. [2024-06-21 20:49:53,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96780 conditions, 8881 events. 5443/8881 cut-off events. For 1839813/1839845 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 60099 event pairs, 1069 based on Foata normal form. 32/8781 useless extension candidates. Maximal degree in co-relation 96574. Up to 7878 conditions per place. [2024-06-21 20:49:53,265 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 880 selfloop transitions, 66 changer transitions 0/1031 dead transitions. [2024-06-21 20:49:53,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1031 transitions, 21542 flow [2024-06-21 20:49:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:49:53,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:49:53,266 INFO L175 Difference]: Start difference. First operand has 469 places, 1006 transitions, 19128 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:49:53,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1031 transitions, 21542 flow [2024-06-21 20:49:59,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 1031 transitions, 21188 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-21 20:49:59,159 INFO L231 Difference]: Finished difference. Result has 473 places, 1013 transitions, 19145 flow [2024-06-21 20:49:59,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18776, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19145, PETRI_PLACES=473, PETRI_TRANSITIONS=1013} [2024-06-21 20:49:59,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-21 20:49:59,160 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 1013 transitions, 19145 flow [2024-06-21 20:49:59,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:49:59,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:59,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:59,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:49:59,160 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:59,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1280851542, now seen corresponding path program 6 times [2024-06-21 20:49:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717979072] [2024-06-21 20:49:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:00,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:00,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717979072] [2024-06-21 20:50:00,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717979072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:00,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:00,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:00,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008433679] [2024-06-21 20:50:00,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:00,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:00,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:00,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:00,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:00,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:50:00,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1013 transitions, 19145 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:00,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:00,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:50:00,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:03,463 INFO L124 PetriNetUnfolderBase]: 5840/9399 cut-off events. [2024-06-21 20:50:03,463 INFO L125 PetriNetUnfolderBase]: For 1795115/1795121 co-relation queries the response was YES. [2024-06-21 20:50:03,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100417 conditions, 9399 events. 5840/9399 cut-off events. For 1795115/1795121 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 62285 event pairs, 1029 based on Foata normal form. 8/9406 useless extension candidates. Maximal degree in co-relation 100209. Up to 8520 conditions per place. [2024-06-21 20:50:03,629 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 913 selfloop transitions, 120 changer transitions 0/1038 dead transitions. [2024-06-21 20:50:03,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1038 transitions, 21722 flow [2024-06-21 20:50:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:50:03,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:50:03,630 INFO L175 Difference]: Start difference. First operand has 473 places, 1013 transitions, 19145 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:50:03,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1038 transitions, 21722 flow [2024-06-21 20:50:08,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1038 transitions, 21567 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 20:50:08,857 INFO L231 Difference]: Finished difference. Result has 477 places, 1016 transitions, 19350 flow [2024-06-21 20:50:08,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18990, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19350, PETRI_PLACES=477, PETRI_TRANSITIONS=1016} [2024-06-21 20:50:08,858 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 433 predicate places. [2024-06-21 20:50:08,859 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1016 transitions, 19350 flow [2024-06-21 20:50:08,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:08,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:08,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:08,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:50:08,859 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:08,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1280851108, now seen corresponding path program 3 times [2024-06-21 20:50:08,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:08,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529755062] [2024-06-21 20:50:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:08,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:09,900 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 20:50:09,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:09,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529755062] [2024-06-21 20:50:09,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529755062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:09,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:09,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:09,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973428405] [2024-06-21 20:50:09,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:09,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:09,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:09,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:50:09,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1016 transitions, 19350 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:50:09,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:09,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:50:09,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:13,025 INFO L124 PetriNetUnfolderBase]: 5461/8909 cut-off events. [2024-06-21 20:50:13,026 INFO L125 PetriNetUnfolderBase]: For 1903110/1903142 co-relation queries the response was YES. [2024-06-21 20:50:13,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98044 conditions, 8909 events. 5461/8909 cut-off events. For 1903110/1903142 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 60300 event pairs, 1069 based on Foata normal form. 33/8810 useless extension candidates. Maximal degree in co-relation 97834. Up to 7930 conditions per place. [2024-06-21 20:50:13,301 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 899 selfloop transitions, 53 changer transitions 0/1038 dead transitions. [2024-06-21 20:50:13,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1038 transitions, 21462 flow [2024-06-21 20:50:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:50:13,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:50:13,302 INFO L175 Difference]: Start difference. First operand has 477 places, 1016 transitions, 19350 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:50:13,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1038 transitions, 21462 flow [2024-06-21 20:50:19,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1038 transitions, 21196 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:19,198 INFO L231 Difference]: Finished difference. Result has 480 places, 1020 transitions, 19311 flow [2024-06-21 20:50:19,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19084, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=963, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19311, PETRI_PLACES=480, PETRI_TRANSITIONS=1020} [2024-06-21 20:50:19,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-21 20:50:19,199 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 1020 transitions, 19311 flow [2024-06-21 20:50:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:50:19,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:19,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:19,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:50:19,199 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:19,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1684584546, now seen corresponding path program 5 times [2024-06-21 20:50:19,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:19,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443591797] [2024-06-21 20:50:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:19,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:20,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:20,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443591797] [2024-06-21 20:50:20,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443591797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:20,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:20,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:50:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725494650] [2024-06-21 20:50:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:20,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:50:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:50:20,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:50:20,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:50:20,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 1020 transitions, 19311 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:50:20,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:20,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:50:20,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:24,223 INFO L124 PetriNetUnfolderBase]: 5971/9628 cut-off events. [2024-06-21 20:50:24,223 INFO L125 PetriNetUnfolderBase]: For 1903608/1903608 co-relation queries the response was YES. [2024-06-21 20:50:24,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102599 conditions, 9628 events. 5971/9628 cut-off events. For 1903608/1903608 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 64239 event pairs, 897 based on Foata normal form. 12/9638 useless extension candidates. Maximal degree in co-relation 102388. Up to 7133 conditions per place. [2024-06-21 20:50:24,391 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 644 selfloop transitions, 443 changer transitions 0/1092 dead transitions. [2024-06-21 20:50:24,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1092 transitions, 22157 flow [2024-06-21 20:50:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:50:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:50:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 20:50:24,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:50:24,392 INFO L175 Difference]: Start difference. First operand has 480 places, 1020 transitions, 19311 flow. Second operand 11 states and 220 transitions. [2024-06-21 20:50:24,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1092 transitions, 22157 flow [2024-06-21 20:50:31,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1092 transitions, 21970 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:31,606 INFO L231 Difference]: Finished difference. Result has 487 places, 1033 transitions, 20379 flow [2024-06-21 20:50:31,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19124, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20379, PETRI_PLACES=487, PETRI_TRANSITIONS=1033} [2024-06-21 20:50:31,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-21 20:50:31,607 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1033 transitions, 20379 flow [2024-06-21 20:50:31,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:50:31,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:31,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:50:31,608 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:31,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -159585604, now seen corresponding path program 6 times [2024-06-21 20:50:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805071923] [2024-06-21 20:50:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:32,775 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 20:50:32,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:32,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805071923] [2024-06-21 20:50:32,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805071923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:32,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:32,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:50:32,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10720806] [2024-06-21 20:50:32,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:32,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:50:32,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:50:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:50:32,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:50:32,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1033 transitions, 20379 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:50:32,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:32,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:50:32,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:36,638 INFO L124 PetriNetUnfolderBase]: 6081/9829 cut-off events. [2024-06-21 20:50:36,638 INFO L125 PetriNetUnfolderBase]: For 1960825/1960825 co-relation queries the response was YES. [2024-06-21 20:50:36,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106257 conditions, 9829 events. 6081/9829 cut-off events. For 1960825/1960825 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 66082 event pairs, 1118 based on Foata normal form. 12/9839 useless extension candidates. Maximal degree in co-relation 106043. Up to 7358 conditions per place. [2024-06-21 20:50:36,951 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 669 selfloop transitions, 413 changer transitions 0/1087 dead transitions. [2024-06-21 20:50:36,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1087 transitions, 23046 flow [2024-06-21 20:50:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:50:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:50:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-21 20:50:36,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:50:36,952 INFO L175 Difference]: Start difference. First operand has 487 places, 1033 transitions, 20379 flow. Second operand 12 states and 238 transitions. [2024-06-21 20:50:36,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1087 transitions, 23046 flow [2024-06-21 20:50:43,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 1087 transitions, 22426 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:43,558 INFO L231 Difference]: Finished difference. Result has 496 places, 1039 transitions, 20825 flow [2024-06-21 20:50:43,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19776, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20825, PETRI_PLACES=496, PETRI_TRANSITIONS=1039} [2024-06-21 20:50:43,559 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 452 predicate places. [2024-06-21 20:50:43,559 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 1039 transitions, 20825 flow [2024-06-21 20:50:43,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:50:43,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:43,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:43,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:50:43,559 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:43,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash -660307212, now seen corresponding path program 7 times [2024-06-21 20:50:43,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:43,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221383184] [2024-06-21 20:50:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:43,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:44,690 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 20:50:44,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:44,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221383184] [2024-06-21 20:50:44,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221383184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:44,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:44,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:50:44,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363963421] [2024-06-21 20:50:44,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:44,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:50:44,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:50:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:50:44,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:50:44,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1039 transitions, 20825 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:50:44,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:44,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:50:44,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:48,501 INFO L124 PetriNetUnfolderBase]: 6122/9907 cut-off events. [2024-06-21 20:50:48,501 INFO L125 PetriNetUnfolderBase]: For 1993879/1993879 co-relation queries the response was YES. [2024-06-21 20:50:48,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106902 conditions, 9907 events. 6122/9907 cut-off events. For 1993879/1993879 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 66825 event pairs, 928 based on Foata normal form. 12/9917 useless extension candidates. Maximal degree in co-relation 106685. Up to 7186 conditions per place. [2024-06-21 20:50:48,694 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 646 selfloop transitions, 450 changer transitions 0/1101 dead transitions. [2024-06-21 20:50:48,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1101 transitions, 23573 flow [2024-06-21 20:50:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:50:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:50:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-21 20:50:48,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-21 20:50:48,696 INFO L175 Difference]: Start difference. First operand has 496 places, 1039 transitions, 20825 flow. Second operand 11 states and 222 transitions. [2024-06-21 20:50:48,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1101 transitions, 23573 flow [2024-06-21 20:50:54,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1101 transitions, 22868 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:54,775 INFO L231 Difference]: Finished difference. Result has 502 places, 1040 transitions, 21120 flow [2024-06-21 20:50:54,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20120, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21120, PETRI_PLACES=502, PETRI_TRANSITIONS=1040} [2024-06-21 20:50:54,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 458 predicate places. [2024-06-21 20:50:54,776 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1040 transitions, 21120 flow [2024-06-21 20:50:54,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:50:54,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:54,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:54,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:50:54,777 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:54,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1418887266, now seen corresponding path program 8 times [2024-06-21 20:50:54,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:54,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138523304] [2024-06-21 20:50:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:54,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:55,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138523304] [2024-06-21 20:50:55,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138523304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:55,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:55,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:50:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407832646] [2024-06-21 20:50:55,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:50:55,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:50:55,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:50:56,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:50:56,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1040 transitions, 21120 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 20:50:56,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:56,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:50:56,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:59,869 INFO L124 PetriNetUnfolderBase]: 6265/10182 cut-off events. [2024-06-21 20:50:59,869 INFO L125 PetriNetUnfolderBase]: For 2110149/2110149 co-relation queries the response was YES. [2024-06-21 20:50:59,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110778 conditions, 10182 events. 6265/10182 cut-off events. For 2110149/2110149 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 69255 event pairs, 1002 based on Foata normal form. 12/10192 useless extension candidates. Maximal degree in co-relation 110560. Up to 4942 conditions per place. [2024-06-21 20:51:00,046 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 584 selfloop transitions, 514 changer transitions 0/1103 dead transitions. [2024-06-21 20:51:00,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1103 transitions, 24342 flow [2024-06-21 20:51:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:51:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:51:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-21 20:51:00,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-21 20:51:00,047 INFO L175 Difference]: Start difference. First operand has 502 places, 1040 transitions, 21120 flow. Second operand 11 states and 223 transitions. [2024-06-21 20:51:00,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1103 transitions, 24342 flow