./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix004.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/mix004.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/mix004.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix004.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 20:31:28,801 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:31:28,869 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:31:28,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:31:28,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:31:28,901 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:31:28,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:31:28,902 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:31:28,903 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:31:28,907 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:31:28,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:31:28,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:31:28,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:31:28,909 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:31:28,909 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:31:28,910 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:31:28,910 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:31:28,910 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:31:28,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:31:28,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:31:28,911 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:31:28,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:31:28,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:31:28,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:31:28,912 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:31:28,912 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:31:28,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:31:28,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:31:28,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:31:28,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:31:28,914 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:31:28,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:31:28,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:31:28,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:31:28,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:31:28,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:31:28,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:31:28,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:31:28,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:31:28,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:31:28,915 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:31:28,916 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:31:28,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:31:28,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:31:29,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:31:29,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:31:29,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:31:29,145 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:31:29,145 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:31:29,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix004.opt.i [2024-06-21 20:31:30,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:31:30,384 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:31:30,385 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.opt.i [2024-06-21 20:31:30,396 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ec8c2a33/0490fd8d6a884d139196eb13388f5808/FLAG3f0077e07 [2024-06-21 20:31:30,405 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ec8c2a33/0490fd8d6a884d139196eb13388f5808 [2024-06-21 20:31:30,407 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:31:30,407 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:31:30,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix004.opt.yml/witness.yml [2024-06-21 20:31:30,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:31:30,561 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:31:30,561 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:31:30,561 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:31:30,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:31:30,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:31:30" (1/2) ... [2024-06-21 20:31:30,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31379856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:30, skipping insertion in model container [2024-06-21 20:31:30,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:31:30" (1/2) ... [2024-06-21 20:31:30,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ac1c7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:30, skipping insertion in model container [2024-06-21 20:31:30,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:31:30" (2/2) ... [2024-06-21 20:31:30,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31379856 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:31:30, skipping insertion in model container [2024-06-21 20:31:30,568 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:31:30" (2/2) ... [2024-06-21 20:31:30,568 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:31:30,670 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:31:30,671 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:31:30,671 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:31:30,672 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:31:30,672 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0) [2024-06-21 20:31:30,672 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:31:30,673 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-21 20:31:30,707 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:31:30,975 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:31:30,989 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:31:31,116 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:31:31,151 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:31:31,152 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:31:31 WrapperNode [2024-06-21 20:31:31,152 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:31:31,153 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:31:31,153 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:31:31,153 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:31:31,158 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,174 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,207 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 163 [2024-06-21 20:31:31,208 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:31:31,209 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:31:31,209 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:31:31,209 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:31:31,217 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,217 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,220 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,237 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 20:31:31,238 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,238 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,246 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,248 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,249 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,251 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,254 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:31:31,255 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:31:31,255 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:31:31,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:31:31,256 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 08:31:31" (1/1) ... [2024-06-21 20:31:31,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:31:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:31:31,293 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 20:31:31,305 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 20:31:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:31:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:31:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:31:31,324 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:31:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:31:31,325 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:31:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:31:31,325 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:31:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 20:31:31,325 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 20:31:31,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:31:31,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:31:31,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:31:31,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:31:31,328 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 20:31:31,442 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:31:31,443 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:31:31,807 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:31:31,807 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:31:31,975 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:31:31,975 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:31:31,975 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:31:31 BoogieIcfgContainer [2024-06-21 20:31:31,975 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:31:31,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:31:31,977 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:31:31,980 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:31:31,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:31:30" (1/4) ... [2024-06-21 20:31:31,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3435ed00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:31:31, skipping insertion in model container [2024-06-21 20:31:31,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:31:30" (2/4) ... [2024-06-21 20:31:31,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3435ed00 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:31:31, skipping insertion in model container [2024-06-21 20:31:31,981 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 08:31:31" (3/4) ... [2024-06-21 20:31:31,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3435ed00 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:31:31, skipping insertion in model container [2024-06-21 20:31:31,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:31:31" (4/4) ... [2024-06-21 20:31:31,982 INFO L112 eAbstractionObserver]: Analyzing ICFG mix004.opt.i [2024-06-21 20:31:31,995 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:31:31,995 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 20:31:31,995 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:31:32,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:31:32,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 20:31:32,101 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 20:31:32,101 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:31:32,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:31:32,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 20:31:32,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 20:31:32,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:31:32,123 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;@46989e44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:31:32,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 20:31:32,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:31:32,127 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:31:32,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:31:32,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:32,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:31:32,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:32,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash 417595377, now seen corresponding path program 1 times [2024-06-21 20:31:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:32,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501234512] [2024-06-21 20:31:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:32,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:33,241 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 20:31:33,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:33,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501234512] [2024-06-21 20:31:33,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501234512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:33,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:33,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:31:33,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303080619] [2024-06-21 20:31:33,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:33,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:31:33,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:33,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:31:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:31:33,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-06-21 20:31:33,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:33,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:33,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-06-21 20:31:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:34,162 INFO L124 PetriNetUnfolderBase]: 4867/7027 cut-off events. [2024-06-21 20:31:34,163 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-21 20:31:34,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13939 conditions, 7027 events. 4867/7027 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 40787 event pairs, 3534 based on Foata normal form. 1/6810 useless extension candidates. Maximal degree in co-relation 13926. Up to 6693 conditions per place. [2024-06-21 20:31:34,199 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 40 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 20:31:34,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 225 flow [2024-06-21 20:31:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:31:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:31:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-21 20:31:34,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:31:34,209 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 106 transitions. [2024-06-21 20:31:34,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 225 flow [2024-06-21 20:31:34,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:34,219 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 20:31:34,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 20:31:34,222 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 20:31:34,223 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 20:31:34,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:34,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:34,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:31:34,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:34,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1877255952, now seen corresponding path program 1 times [2024-06-21 20:31:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:34,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864798832] [2024-06-21 20:31:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:34,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:34,924 INFO 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 20:31:34,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:34,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864798832] [2024-06-21 20:31:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864798832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:34,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:34,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:31:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208981611] [2024-06-21 20:31:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:31:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:31:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:31:34,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-21 20:31:34,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:34,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:34,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-21 20:31:34,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:35,697 INFO L124 PetriNetUnfolderBase]: 5569/7857 cut-off events. [2024-06-21 20:31:35,697 INFO L125 PetriNetUnfolderBase]: For 1758/1758 co-relation queries the response was YES. [2024-06-21 20:31:35,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18044 conditions, 7857 events. 5569/7857 cut-off events. For 1758/1758 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44449 event pairs, 3437 based on Foata normal form. 4/7815 useless extension candidates. Maximal degree in co-relation 18032. Up to 7610 conditions per place. [2024-06-21 20:31:35,741 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 51 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 20:31:35,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 319 flow [2024-06-21 20:31:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:31:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:31:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-21 20:31:35,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-21 20:31:35,746 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 136 transitions. [2024-06-21 20:31:35,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 319 flow [2024-06-21 20:31:35,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:31:35,761 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 20:31:35,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 20:31:35,761 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 20:31:35,762 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 20:31:35,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:35,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:35,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:35,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:31:35,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:35,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:35,763 INFO L85 PathProgramCache]: Analyzing trace with hash 564740903, now seen corresponding path program 1 times [2024-06-21 20:31:35,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:35,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437816615] [2024-06-21 20:31:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:35,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:36,634 INFO 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 20:31:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:36,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437816615] [2024-06-21 20:31:36,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437816615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:36,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:36,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:31:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011146999] [2024-06-21 20:31:36,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:36,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:31:36,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:31:36,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:31:36,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 20:31:36,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:36,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:36,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 20:31:36,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:37,807 INFO L124 PetriNetUnfolderBase]: 7070/9909 cut-off events. [2024-06-21 20:31:37,807 INFO L125 PetriNetUnfolderBase]: For 6002/6002 co-relation queries the response was YES. [2024-06-21 20:31:37,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25343 conditions, 9909 events. 7070/9909 cut-off events. For 6002/6002 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56128 event pairs, 3323 based on Foata normal form. 8/9858 useless extension candidates. Maximal degree in co-relation 25329. Up to 9556 conditions per place. [2024-06-21 20:31:37,860 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-21 20:31:37,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 484 flow [2024-06-21 20:31:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-21 20:31:37,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60062893081761 [2024-06-21 20:31:37,864 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 191 transitions. [2024-06-21 20:31:37,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 484 flow [2024-06-21 20:31:37,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 456 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 20:31:37,869 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-21 20:31:37,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-21 20:31:37,870 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-21 20:31:37,870 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-21 20:31:37,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:37,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:37,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:37,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:31:37,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:37,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash -671642190, now seen corresponding path program 1 times [2024-06-21 20:31:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:37,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607913501] [2024-06-21 20:31:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:37,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:38,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607913501] [2024-06-21 20:31:38,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607913501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:38,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:38,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:31:38,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105209350] [2024-06-21 20:31:38,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:38,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:31:38,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:31:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:31:38,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 20:31:38,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:38,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:38,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 20:31:38,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:39,708 INFO L124 PetriNetUnfolderBase]: 6156/8926 cut-off events. [2024-06-21 20:31:39,708 INFO L125 PetriNetUnfolderBase]: For 9719/9719 co-relation queries the response was YES. [2024-06-21 20:31:39,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24968 conditions, 8926 events. 6156/8926 cut-off events. For 9719/9719 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 52173 event pairs, 3157 based on Foata normal form. 3/8827 useless extension candidates. Maximal degree in co-relation 24951. Up to 8408 conditions per place. [2024-06-21 20:31:39,750 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 58 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-21 20:31:39,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 445 flow [2024-06-21 20:31:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:31:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:31:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 20:31:39,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 20:31:39,752 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 140 transitions. [2024-06-21 20:31:39,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 445 flow [2024-06-21 20:31:39,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 407 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:39,760 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-21 20:31:39,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-21 20:31:39,761 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-21 20:31:39,761 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-21 20:31:39,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:39,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:39,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:39,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:31:39,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:39,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1081318993, now seen corresponding path program 1 times [2024-06-21 20:31:39,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:39,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885038519] [2024-06-21 20:31:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:39,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:40,598 INFO 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 20:31:40,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:40,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885038519] [2024-06-21 20:31:40,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885038519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:40,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:40,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745962819] [2024-06-21 20:31:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:40,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:40,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:40,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:40,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:40,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:40,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:42,077 INFO L124 PetriNetUnfolderBase]: 7083/9987 cut-off events. [2024-06-21 20:31:42,077 INFO L125 PetriNetUnfolderBase]: For 17651/17673 co-relation queries the response was YES. [2024-06-21 20:31:42,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30795 conditions, 9987 events. 7083/9987 cut-off events. For 17651/17673 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 56697 event pairs, 3545 based on Foata normal form. 5/9968 useless extension candidates. Maximal degree in co-relation 30776. Up to 9589 conditions per place. [2024-06-21 20:31:42,129 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 20:31:42,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 602 flow [2024-06-21 20:31:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 20:31:42,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345911949685535 [2024-06-21 20:31:42,132 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 170 transitions. [2024-06-21 20:31:42,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 602 flow [2024-06-21 20:31:42,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 573 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:42,137 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-21 20:31:42,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-21 20:31:42,143 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-21 20:31:42,144 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-21 20:31:42,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:42,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:42,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:42,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:31:42,144 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:42,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:42,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1107329233, now seen corresponding path program 2 times [2024-06-21 20:31:42,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:42,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7489198] [2024-06-21 20:31:42,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:42,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:42,946 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 20:31:42,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:42,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7489198] [2024-06-21 20:31:42,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7489198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:42,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:42,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:42,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32633198] [2024-06-21 20:31:42,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:42,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:42,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:43,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:43,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:43,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:43,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:44,130 INFO L124 PetriNetUnfolderBase]: 7074/9990 cut-off events. [2024-06-21 20:31:44,130 INFO L125 PetriNetUnfolderBase]: For 25783/25826 co-relation queries the response was YES. [2024-06-21 20:31:44,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 9990 events. 7074/9990 cut-off events. For 25783/25826 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 56906 event pairs, 3548 based on Foata normal form. 25/9992 useless extension candidates. Maximal degree in co-relation 33449. Up to 9580 conditions per place. [2024-06-21 20:31:44,187 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 63 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-21 20:31:44,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 584 flow [2024-06-21 20:31:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 20:31:44,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-21 20:31:44,188 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 164 transitions. [2024-06-21 20:31:44,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 584 flow [2024-06-21 20:31:44,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 538 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 20:31:44,201 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-21 20:31:44,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-21 20:31:44,202 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-21 20:31:44,202 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-21 20:31:44,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:44,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:44,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:44,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:31:44,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:44,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:44,203 INFO L85 PathProgramCache]: Analyzing trace with hash -357307681, now seen corresponding path program 1 times [2024-06-21 20:31:44,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:44,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175857981] [2024-06-21 20:31:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:44,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:45,084 INFO 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 20:31:45,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:45,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175857981] [2024-06-21 20:31:45,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175857981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:45,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:45,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:45,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858893949] [2024-06-21 20:31:45,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:45,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:45,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:45,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:45,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:45,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:45,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:45,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:46,398 INFO L124 PetriNetUnfolderBase]: 7165/10144 cut-off events. [2024-06-21 20:31:46,398 INFO L125 PetriNetUnfolderBase]: For 29531/29569 co-relation queries the response was YES. [2024-06-21 20:31:46,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34359 conditions, 10144 events. 7165/10144 cut-off events. For 29531/29569 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 57834 event pairs, 3538 based on Foata normal form. 7/10131 useless extension candidates. Maximal degree in co-relation 34337. Up to 9682 conditions per place. [2024-06-21 20:31:46,450 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 87 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-21 20:31:46,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 820 flow [2024-06-21 20:31:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-21 20:31:46,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-21 20:31:46,452 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 221 transitions. [2024-06-21 20:31:46,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 820 flow [2024-06-21 20:31:46,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 128 transitions, 746 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:46,465 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-21 20:31:46,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-21 20:31:46,466 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-21 20:31:46,466 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-21 20:31:46,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:46,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:46,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:46,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:31:46,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:46,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash -838852777, now seen corresponding path program 2 times [2024-06-21 20:31:46,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:46,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050819647] [2024-06-21 20:31:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:46,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:47,391 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 20:31:47,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:47,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050819647] [2024-06-21 20:31:47,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050819647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:47,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:47,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588321169] [2024-06-21 20:31:47,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:47,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:47,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:47,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:47,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:47,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:47,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:47,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:47,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:48,763 INFO L124 PetriNetUnfolderBase]: 7187/10160 cut-off events. [2024-06-21 20:31:48,764 INFO L125 PetriNetUnfolderBase]: For 40060/40124 co-relation queries the response was YES. [2024-06-21 20:31:48,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37368 conditions, 10160 events. 7187/10160 cut-off events. For 40060/40124 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 57848 event pairs, 3446 based on Foata normal form. 11/10153 useless extension candidates. Maximal degree in co-relation 37344. Up to 9689 conditions per place. [2024-06-21 20:31:48,830 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 87 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-21 20:31:48,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 925 flow [2024-06-21 20:31:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 20:31:48,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-21 20:31:48,833 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 194 transitions. [2024-06-21 20:31:48,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 925 flow [2024-06-21 20:31:48,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 130 transitions, 867 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:48,854 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-21 20:31:48,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-21 20:31:48,856 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-21 20:31:48,856 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-21 20:31:48,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:48,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:48,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:48,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:31:48,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:48,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1184405505, now seen corresponding path program 3 times [2024-06-21 20:31:48,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:48,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4539569] [2024-06-21 20:31:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:48,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:49,799 INFO 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 20:31:49,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:49,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4539569] [2024-06-21 20:31:49,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4539569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:49,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:49,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:49,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611849388] [2024-06-21 20:31:49,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:49,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:49,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:49,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:49,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:49,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:49,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:49,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:51,284 INFO L124 PetriNetUnfolderBase]: 7209/10195 cut-off events. [2024-06-21 20:31:51,284 INFO L125 PetriNetUnfolderBase]: For 52609/52667 co-relation queries the response was YES. [2024-06-21 20:31:51,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40251 conditions, 10195 events. 7209/10195 cut-off events. For 52609/52667 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 57975 event pairs, 3397 based on Foata normal form. 21/10194 useless extension candidates. Maximal degree in co-relation 40226. Up to 9633 conditions per place. [2024-06-21 20:31:51,345 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 77 selfloop transitions, 50 changer transitions 0/136 dead transitions. [2024-06-21 20:31:51,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 1102 flow [2024-06-21 20:31:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 20:31:51,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-21 20:31:51,346 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 198 transitions. [2024-06-21 20:31:51,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 1102 flow [2024-06-21 20:31:51,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 983 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:51,373 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-21 20:31:51,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-21 20:31:51,373 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-21 20:31:51,373 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-21 20:31:51,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:51,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:51,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:51,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:31:51,374 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:51,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash 443683359, now seen corresponding path program 4 times [2024-06-21 20:31:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:51,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186868863] [2024-06-21 20:31:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:51,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:52,260 INFO 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 20:31:52,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:52,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186868863] [2024-06-21 20:31:52,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186868863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:52,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:52,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:52,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969462416] [2024-06-21 20:31:52,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:52,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:52,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:52,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:52,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:52,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:52,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:52,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:52,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:52,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:53,646 INFO L124 PetriNetUnfolderBase]: 7200/10196 cut-off events. [2024-06-21 20:31:53,646 INFO L125 PetriNetUnfolderBase]: For 53390/53451 co-relation queries the response was YES. [2024-06-21 20:31:53,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40196 conditions, 10196 events. 7200/10196 cut-off events. For 53390/53451 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 57950 event pairs, 3404 based on Foata normal form. 19/10183 useless extension candidates. Maximal degree in co-relation 40170. Up to 9624 conditions per place. [2024-06-21 20:31:53,707 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 72 selfloop transitions, 50 changer transitions 0/131 dead transitions. [2024-06-21 20:31:53,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1038 flow [2024-06-21 20:31:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 20:31:53,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-21 20:31:53,709 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 192 transitions. [2024-06-21 20:31:53,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1038 flow [2024-06-21 20:31:53,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 955 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:53,738 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-21 20:31:53,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-21 20:31:53,739 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-21 20:31:53,739 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-21 20:31:53,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:53,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:53,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:53,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:31:53,740 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:53,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:53,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1361783289, now seen corresponding path program 1 times [2024-06-21 20:31:53,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:53,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198105834] [2024-06-21 20:31:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:53,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:54,682 INFO 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 20:31:54,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:54,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198105834] [2024-06-21 20:31:54,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198105834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:54,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:54,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:54,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969200751] [2024-06-21 20:31:54,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:54,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:54,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:54,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:54,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:54,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:54,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:54,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:54,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:56,308 INFO L124 PetriNetUnfolderBase]: 8032/11580 cut-off events. [2024-06-21 20:31:56,308 INFO L125 PetriNetUnfolderBase]: For 63107/63109 co-relation queries the response was YES. [2024-06-21 20:31:56,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45057 conditions, 11580 events. 8032/11580 cut-off events. For 63107/63109 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 66880 event pairs, 3728 based on Foata normal form. 6/11469 useless extension candidates. Maximal degree in co-relation 45029. Up to 10879 conditions per place. [2024-06-21 20:31:56,363 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 113 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-21 20:31:56,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1149 flow [2024-06-21 20:31:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 20:31:56,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-21 20:31:56,364 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 188 transitions. [2024-06-21 20:31:56,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1149 flow [2024-06-21 20:31:56,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1008 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:56,398 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-21 20:31:56,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-21 20:31:56,399 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-21 20:31:56,399 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-21 20:31:56,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:56,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:56,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:56,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:31:56,400 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:56,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash 325714881, now seen corresponding path program 1 times [2024-06-21 20:31:56,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:56,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395515859] [2024-06-21 20:31:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:56,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:57,108 INFO 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 20:31:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395515859] [2024-06-21 20:31:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395515859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:57,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:57,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:31:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124486235] [2024-06-21 20:31:57,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:57,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:31:57,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:31:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:31:57,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:57,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:57,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:57,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:57,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:58,509 INFO L124 PetriNetUnfolderBase]: 9059/12987 cut-off events. [2024-06-21 20:31:58,510 INFO L125 PetriNetUnfolderBase]: For 86452/86472 co-relation queries the response was YES. [2024-06-21 20:31:58,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53730 conditions, 12987 events. 9059/12987 cut-off events. For 86452/86472 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75599 event pairs, 4701 based on Foata normal form. 20/12839 useless extension candidates. Maximal degree in co-relation 53700. Up to 12368 conditions per place. [2024-06-21 20:31:58,592 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 102 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-21 20:31:58,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 1009 flow [2024-06-21 20:31:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:31:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:31:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 20:31:58,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-06-21 20:31:58,594 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 132 transitions. [2024-06-21 20:31:58,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 1009 flow [2024-06-21 20:31:58,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 949 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:58,633 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-21 20:31:58,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-21 20:31:58,633 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-21 20:31:58,634 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-21 20:31:58,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:58,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:58,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:58,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:31:58,634 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:31:58,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1507228129, now seen corresponding path program 1 times [2024-06-21 20:31:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:58,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255507087] [2024-06-21 20:31:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:59,441 INFO 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 20:31:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255507087] [2024-06-21 20:31:59,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255507087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:59,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:59,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:59,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441819057] [2024-06-21 20:31:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:59,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:59,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:59,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:31:59,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:59,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:59,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:31:59,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:00,959 INFO L124 PetriNetUnfolderBase]: 9082/13210 cut-off events. [2024-06-21 20:32:00,959 INFO L125 PetriNetUnfolderBase]: For 101568/101588 co-relation queries the response was YES. [2024-06-21 20:32:00,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56956 conditions, 13210 events. 9082/13210 cut-off events. For 101568/101588 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 78443 event pairs, 4665 based on Foata normal form. 22/13201 useless extension candidates. Maximal degree in co-relation 56925. Up to 12332 conditions per place. [2024-06-21 20:32:01,055 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 107 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2024-06-21 20:32:01,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 1060 flow [2024-06-21 20:32:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:32:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:32:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:32:01,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-21 20:32:01,056 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:32:01,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 1060 flow [2024-06-21 20:32:01,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1017 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:01,121 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 762 flow [2024-06-21 20:32:01,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=762, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-21 20:32:01,122 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-21 20:32:01,122 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 762 flow [2024-06-21 20:32:01,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:01,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:01,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:01,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:32:01,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:01,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1202701150, now seen corresponding path program 1 times [2024-06-21 20:32:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:01,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107934292] [2024-06-21 20:32:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:02,222 INFO 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 20:32:02,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:02,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107934292] [2024-06-21 20:32:02,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107934292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:02,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:02,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:02,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197488582] [2024-06-21 20:32:02,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:02,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:02,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:02,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:32:02,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 762 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:02,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:02,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:32:02,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:04,399 INFO L124 PetriNetUnfolderBase]: 10479/14763 cut-off events. [2024-06-21 20:32:04,399 INFO L125 PetriNetUnfolderBase]: For 153506/153717 co-relation queries the response was YES. [2024-06-21 20:32:04,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71029 conditions, 14763 events. 10479/14763 cut-off events. For 153506/153717 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 86207 event pairs, 3699 based on Foata normal form. 47/14740 useless extension candidates. Maximal degree in co-relation 70997. Up to 13675 conditions per place. [2024-06-21 20:32:04,489 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 129 selfloop transitions, 41 changer transitions 0/181 dead transitions. [2024-06-21 20:32:04,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 181 transitions, 1464 flow [2024-06-21 20:32:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-21 20:32:04,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303983228511531 [2024-06-21 20:32:04,491 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 762 flow. Second operand 9 states and 253 transitions. [2024-06-21 20:32:04,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 181 transitions, 1464 flow [2024-06-21 20:32:04,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 181 transitions, 1407 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:04,539 INFO L231 Difference]: Finished difference. Result has 96 places, 119 transitions, 880 flow [2024-06-21 20:32:04,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=880, PETRI_PLACES=96, PETRI_TRANSITIONS=119} [2024-06-21 20:32:04,539 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-21 20:32:04,539 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 119 transitions, 880 flow [2024-06-21 20:32:04,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:04,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:04,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:04,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:32:04,540 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:04,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1205558110, now seen corresponding path program 2 times [2024-06-21 20:32:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:04,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598787551] [2024-06-21 20:32:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:05,591 INFO 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 20:32:05,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:05,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598787551] [2024-06-21 20:32:05,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598787551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:05,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:05,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:05,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200756623] [2024-06-21 20:32:05,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:05,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:05,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:05,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:32:05,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 119 transitions, 880 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:05,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:05,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:32:05,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:07,705 INFO L124 PetriNetUnfolderBase]: 10433/14725 cut-off events. [2024-06-21 20:32:07,705 INFO L125 PetriNetUnfolderBase]: For 173884/174095 co-relation queries the response was YES. [2024-06-21 20:32:07,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72749 conditions, 14725 events. 10433/14725 cut-off events. For 173884/174095 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 86221 event pairs, 4271 based on Foata normal form. 53/14714 useless extension candidates. Maximal degree in co-relation 72716. Up to 13833 conditions per place. [2024-06-21 20:32:07,823 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 121 selfloop transitions, 36 changer transitions 0/168 dead transitions. [2024-06-21 20:32:07,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 168 transitions, 1366 flow [2024-06-21 20:32:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 20:32:07,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-21 20:32:07,824 INFO L175 Difference]: Start difference. First operand has 96 places, 119 transitions, 880 flow. Second operand 8 states and 222 transitions. [2024-06-21 20:32:07,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 168 transitions, 1366 flow [2024-06-21 20:32:07,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 168 transitions, 1293 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:07,908 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 891 flow [2024-06-21 20:32:07,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2024-06-21 20:32:07,908 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-21 20:32:07,908 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 891 flow [2024-06-21 20:32:07,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:07,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:07,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:07,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:32:07,909 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:07,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash 47404544, now seen corresponding path program 3 times [2024-06-21 20:32:07,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:07,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411708230] [2024-06-21 20:32:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:08,968 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 20:32:08,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:08,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411708230] [2024-06-21 20:32:08,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411708230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:08,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:08,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:08,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786574812] [2024-06-21 20:32:08,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:08,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:08,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:09,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:32:09,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 891 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:09,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:09,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:32:09,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:10,980 INFO L124 PetriNetUnfolderBase]: 10541/14906 cut-off events. [2024-06-21 20:32:10,981 INFO L125 PetriNetUnfolderBase]: For 191148/191353 co-relation queries the response was YES. [2024-06-21 20:32:11,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74836 conditions, 14906 events. 10541/14906 cut-off events. For 191148/191353 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 87746 event pairs, 4321 based on Foata normal form. 76/14920 useless extension candidates. Maximal degree in co-relation 74801. Up to 13908 conditions per place. [2024-06-21 20:32:11,098 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 99 selfloop transitions, 55 changer transitions 0/165 dead transitions. [2024-06-21 20:32:11,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1391 flow [2024-06-21 20:32:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-21 20:32:11,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-21 20:32:11,101 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 891 flow. Second operand 8 states and 223 transitions. [2024-06-21 20:32:11,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1391 flow [2024-06-21 20:32:11,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 165 transitions, 1309 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:11,216 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 977 flow [2024-06-21 20:32:11,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-21 20:32:11,217 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-21 20:32:11,217 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 977 flow [2024-06-21 20:32:11,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:11,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:11,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:11,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:32:11,219 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:11,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1321033978, now seen corresponding path program 1 times [2024-06-21 20:32:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:11,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54290273] [2024-06-21 20:32:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:12,338 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 20:32:12,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:12,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54290273] [2024-06-21 20:32:12,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54290273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:12,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:12,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:12,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664241974] [2024-06-21 20:32:12,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:12,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:12,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:12,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:12,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 977 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:12,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:12,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:12,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:14,328 INFO L124 PetriNetUnfolderBase]: 10984/15428 cut-off events. [2024-06-21 20:32:14,328 INFO L125 PetriNetUnfolderBase]: For 216343/216354 co-relation queries the response was YES. [2024-06-21 20:32:14,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77894 conditions, 15428 events. 10984/15428 cut-off events. For 216343/216354 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 87814 event pairs, 4681 based on Foata normal form. 14/15372 useless extension candidates. Maximal degree in co-relation 77858. Up to 14680 conditions per place. [2024-06-21 20:32:14,466 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 129 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-21 20:32:14,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 173 transitions, 1536 flow [2024-06-21 20:32:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 20:32:14,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-21 20:32:14,468 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 977 flow. Second operand 8 states and 214 transitions. [2024-06-21 20:32:14,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 173 transitions, 1536 flow [2024-06-21 20:32:14,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 173 transitions, 1404 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:14,627 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1020 flow [2024-06-21 20:32:14,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1020, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-21 20:32:14,628 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-21 20:32:14,628 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1020 flow [2024-06-21 20:32:14,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:14,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:14,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:14,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:32:14,628 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:14,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash -532008544, now seen corresponding path program 1 times [2024-06-21 20:32:14,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:14,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098508761] [2024-06-21 20:32:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:14,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:15,444 INFO 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 20:32:15,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:15,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098508761] [2024-06-21 20:32:15,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098508761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:15,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:15,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:32:15,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408677190] [2024-06-21 20:32:15,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:15,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:32:15,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:32:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:32:15,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:15,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1020 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:15,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:15,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:15,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:17,232 INFO L124 PetriNetUnfolderBase]: 10937/15393 cut-off events. [2024-06-21 20:32:17,232 INFO L125 PetriNetUnfolderBase]: For 233562/233585 co-relation queries the response was YES. [2024-06-21 20:32:17,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79870 conditions, 15393 events. 10937/15393 cut-off events. For 233562/233585 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 88053 event pairs, 5117 based on Foata normal form. 23/15390 useless extension candidates. Maximal degree in co-relation 79832. Up to 14751 conditions per place. [2024-06-21 20:32:17,362 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 112 selfloop transitions, 35 changer transitions 0/161 dead transitions. [2024-06-21 20:32:17,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 1558 flow [2024-06-21 20:32:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:32:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:32:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 20:32:17,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-21 20:32:17,364 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1020 flow. Second operand 6 states and 160 transitions. [2024-06-21 20:32:17,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 1558 flow [2024-06-21 20:32:17,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 161 transitions, 1446 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:17,497 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1103 flow [2024-06-21 20:32:17,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1103, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2024-06-21 20:32:17,497 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-21 20:32:17,497 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1103 flow [2024-06-21 20:32:17,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:17,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:17,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:17,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:32:17,498 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:17,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1527896576, now seen corresponding path program 4 times [2024-06-21 20:32:17,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:17,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573330587] [2024-06-21 20:32:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:17,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:18,505 INFO 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 20:32:18,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573330587] [2024-06-21 20:32:18,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573330587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:18,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:18,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:18,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015459404] [2024-06-21 20:32:18,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:18,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:18,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:18,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:18,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 20:32:18,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1103 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:18,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:18,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 20:32:18,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:20,532 INFO L124 PetriNetUnfolderBase]: 10667/15156 cut-off events. [2024-06-21 20:32:20,532 INFO L125 PetriNetUnfolderBase]: For 276180/276347 co-relation queries the response was YES. [2024-06-21 20:32:20,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83879 conditions, 15156 events. 10667/15156 cut-off events. For 276180/276347 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 89535 event pairs, 4276 based on Foata normal form. 46/15101 useless extension candidates. Maximal degree in co-relation 83840. Up to 14041 conditions per place. [2024-06-21 20:32:20,665 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 109 selfloop transitions, 57 changer transitions 0/180 dead transitions. [2024-06-21 20:32:20,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 180 transitions, 1633 flow [2024-06-21 20:32:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 20:32:20,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 20:32:20,666 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1103 flow. Second operand 8 states and 220 transitions. [2024-06-21 20:32:20,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 180 transitions, 1633 flow [2024-06-21 20:32:20,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 1583 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 20:32:20,822 INFO L231 Difference]: Finished difference. Result has 110 places, 138 transitions, 1235 flow [2024-06-21 20:32:20,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1235, PETRI_PLACES=110, PETRI_TRANSITIONS=138} [2024-06-21 20:32:20,823 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-21 20:32:20,823 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 138 transitions, 1235 flow [2024-06-21 20:32:20,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:20,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:20,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:20,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:32:20,824 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:20,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1521455768, now seen corresponding path program 2 times [2024-06-21 20:32:20,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:20,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153755980] [2024-06-21 20:32:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:21,867 INFO 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 20:32:21,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:21,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153755980] [2024-06-21 20:32:21,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153755980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:21,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:21,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:21,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296599757] [2024-06-21 20:32:21,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:21,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:21,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:21,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 138 transitions, 1235 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:21,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:21,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:21,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:23,980 INFO L124 PetriNetUnfolderBase]: 11171/15729 cut-off events. [2024-06-21 20:32:23,980 INFO L125 PetriNetUnfolderBase]: For 304655/304676 co-relation queries the response was YES. [2024-06-21 20:32:24,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88114 conditions, 15729 events. 11171/15729 cut-off events. For 304655/304676 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 89946 event pairs, 4689 based on Foata normal form. 20/15675 useless extension candidates. Maximal degree in co-relation 88073. Up to 14918 conditions per place. [2024-06-21 20:32:24,114 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 137 selfloop transitions, 43 changer transitions 0/191 dead transitions. [2024-06-21 20:32:24,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 191 transitions, 1863 flow [2024-06-21 20:32:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 20:32:24,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-21 20:32:24,116 INFO L175 Difference]: Start difference. First operand has 110 places, 138 transitions, 1235 flow. Second operand 8 states and 210 transitions. [2024-06-21 20:32:24,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 191 transitions, 1863 flow [2024-06-21 20:32:24,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 191 transitions, 1711 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:24,476 INFO L231 Difference]: Finished difference. Result has 113 places, 149 transitions, 1329 flow [2024-06-21 20:32:24,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1329, PETRI_PLACES=113, PETRI_TRANSITIONS=149} [2024-06-21 20:32:24,476 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-21 20:32:24,476 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 149 transitions, 1329 flow [2024-06-21 20:32:24,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:24,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:24,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:24,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:32:24,477 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:24,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1527711878, now seen corresponding path program 3 times [2024-06-21 20:32:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233123867] [2024-06-21 20:32:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:25,469 INFO 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 20:32:25,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:25,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233123867] [2024-06-21 20:32:25,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233123867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:25,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:25,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:25,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103904004] [2024-06-21 20:32:25,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:25,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:25,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:25,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:25,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 149 transitions, 1329 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:25,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:25,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:25,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:27,791 INFO L124 PetriNetUnfolderBase]: 11207/15781 cut-off events. [2024-06-21 20:32:27,791 INFO L125 PetriNetUnfolderBase]: For 336184/336205 co-relation queries the response was YES. [2024-06-21 20:32:27,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91508 conditions, 15781 events. 11207/15781 cut-off events. For 336184/336205 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 90167 event pairs, 4713 based on Foata normal form. 20/15727 useless extension candidates. Maximal degree in co-relation 91465. Up to 14970 conditions per place. [2024-06-21 20:32:27,925 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 141 selfloop transitions, 42 changer transitions 0/194 dead transitions. [2024-06-21 20:32:27,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 194 transitions, 1905 flow [2024-06-21 20:32:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 20:32:27,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-21 20:32:27,926 INFO L175 Difference]: Start difference. First operand has 113 places, 149 transitions, 1329 flow. Second operand 8 states and 211 transitions. [2024-06-21 20:32:27,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 194 transitions, 1905 flow [2024-06-21 20:32:28,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 194 transitions, 1795 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:28,114 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1389 flow [2024-06-21 20:32:28,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1389, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-06-21 20:32:28,115 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-21 20:32:28,115 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1389 flow [2024-06-21 20:32:28,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:28,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:28,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:28,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:32:28,115 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:28,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1291239848, now seen corresponding path program 4 times [2024-06-21 20:32:28,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:28,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55989103] [2024-06-21 20:32:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:28,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:29,095 INFO 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 20:32:29,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:29,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55989103] [2024-06-21 20:32:29,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55989103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:29,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:29,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:29,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395127838] [2024-06-21 20:32:29,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:29,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:29,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:29,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:29,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1389 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:29,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:29,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:29,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:31,307 INFO L124 PetriNetUnfolderBase]: 11192/15760 cut-off events. [2024-06-21 20:32:31,308 INFO L125 PetriNetUnfolderBase]: For 365556/365577 co-relation queries the response was YES. [2024-06-21 20:32:31,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92372 conditions, 15760 events. 11192/15760 cut-off events. For 365556/365577 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 90004 event pairs, 4405 based on Foata normal form. 20/15706 useless extension candidates. Maximal degree in co-relation 92328. Up to 14821 conditions per place. [2024-06-21 20:32:31,431 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 133 selfloop transitions, 54 changer transitions 0/198 dead transitions. [2024-06-21 20:32:31,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 198 transitions, 1981 flow [2024-06-21 20:32:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 20:32:31,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-21 20:32:31,432 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1389 flow. Second operand 8 states and 211 transitions. [2024-06-21 20:32:31,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 198 transitions, 1981 flow [2024-06-21 20:32:31,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 198 transitions, 1809 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 20:32:31,629 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1417 flow [2024-06-21 20:32:31,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1417, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-06-21 20:32:31,630 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-21 20:32:31,630 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1417 flow [2024-06-21 20:32:31,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:31,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:31,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:31,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:32:31,630 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:31,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 338293826, now seen corresponding path program 2 times [2024-06-21 20:32:31,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:31,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401637199] [2024-06-21 20:32:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:31,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:32,361 INFO 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 20:32:32,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:32,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401637199] [2024-06-21 20:32:32,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401637199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:32,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:32:32,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354785876] [2024-06-21 20:32:32,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:32,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:32:32,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:32,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:32:32,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:32:32,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:32,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1417 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:32,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:32,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:32,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:34,488 INFO L124 PetriNetUnfolderBase]: 11074/15608 cut-off events. [2024-06-21 20:32:34,488 INFO L125 PetriNetUnfolderBase]: For 383020/383035 co-relation queries the response was YES. [2024-06-21 20:32:34,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91799 conditions, 15608 events. 11074/15608 cut-off events. For 383020/383035 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 89570 event pairs, 5133 based on Foata normal form. 15/15575 useless extension candidates. Maximal degree in co-relation 91756. Up to 14942 conditions per place. [2024-06-21 20:32:34,621 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 119 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-21 20:32:34,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 173 transitions, 1781 flow [2024-06-21 20:32:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:32:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:32:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:32:34,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-21 20:32:34,623 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1417 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:32:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 173 transitions, 1781 flow [2024-06-21 20:32:34,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 173 transitions, 1579 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:34,823 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1294 flow [2024-06-21 20:32:34,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1294, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-06-21 20:32:34,824 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-21 20:32:34,824 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1294 flow [2024-06-21 20:32:34,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:34,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:34,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:34,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:32:34,824 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:34,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:34,825 INFO L85 PathProgramCache]: Analyzing trace with hash -526288672, now seen corresponding path program 1 times [2024-06-21 20:32:34,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:34,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521542462] [2024-06-21 20:32:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:35,573 INFO 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 20:32:35,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521542462] [2024-06-21 20:32:35,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521542462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:35,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:35,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:32:35,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477939957] [2024-06-21 20:32:35,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:35,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:32:35,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:35,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:32:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:32:35,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:35,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1294 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:35,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:35,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:35,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:37,411 INFO L124 PetriNetUnfolderBase]: 10333/14706 cut-off events. [2024-06-21 20:32:37,411 INFO L125 PetriNetUnfolderBase]: For 350893/350901 co-relation queries the response was YES. [2024-06-21 20:32:37,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86611 conditions, 14706 events. 10333/14706 cut-off events. For 350893/350901 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 84414 event pairs, 4392 based on Foata normal form. 6/14676 useless extension candidates. Maximal degree in co-relation 86567. Up to 14061 conditions per place. [2024-06-21 20:32:37,520 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 157 selfloop transitions, 21 changer transitions 0/186 dead transitions. [2024-06-21 20:32:37,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 186 transitions, 1928 flow [2024-06-21 20:32:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:32:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:32:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:32:37,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-21 20:32:37,521 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1294 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:32:37,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 186 transitions, 1928 flow [2024-06-21 20:32:37,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 186 transitions, 1827 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:37,748 INFO L231 Difference]: Finished difference. Result has 119 places, 163 transitions, 1372 flow [2024-06-21 20:32:37,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1372, PETRI_PLACES=119, PETRI_TRANSITIONS=163} [2024-06-21 20:32:37,749 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-21 20:32:37,749 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 163 transitions, 1372 flow [2024-06-21 20:32:37,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:37,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:37,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:37,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:32:37,749 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:37,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash 366899138, now seen corresponding path program 2 times [2024-06-21 20:32:37,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:37,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606705464] [2024-06-21 20:32:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:37,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:38,470 INFO 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 20:32:38,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:38,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606705464] [2024-06-21 20:32:38,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606705464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:38,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:38,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:32:38,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352584701] [2024-06-21 20:32:38,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:38,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:32:38,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:38,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:32:38,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:32:38,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:38,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 163 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:38,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:38,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:38,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:40,377 INFO L124 PetriNetUnfolderBase]: 10326/14730 cut-off events. [2024-06-21 20:32:40,377 INFO L125 PetriNetUnfolderBase]: For 380927/380935 co-relation queries the response was YES. [2024-06-21 20:32:40,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89632 conditions, 14730 events. 10326/14730 cut-off events. For 380927/380935 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 84769 event pairs, 4411 based on Foata normal form. 6/14699 useless extension candidates. Maximal degree in co-relation 89587. Up to 14054 conditions per place. [2024-06-21 20:32:40,484 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 152 selfloop transitions, 21 changer transitions 0/181 dead transitions. [2024-06-21 20:32:40,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 181 transitions, 1774 flow [2024-06-21 20:32:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:32:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:32:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:32:40,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-21 20:32:40,485 INFO L175 Difference]: Start difference. First operand has 119 places, 163 transitions, 1372 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:32:40,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 181 transitions, 1774 flow [2024-06-21 20:32:40,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1670 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-21 20:32:40,746 INFO L231 Difference]: Finished difference. Result has 123 places, 163 transitions, 1319 flow [2024-06-21 20:32:40,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1319, PETRI_PLACES=123, PETRI_TRANSITIONS=163} [2024-06-21 20:32:40,747 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-21 20:32:40,747 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 163 transitions, 1319 flow [2024-06-21 20:32:40,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:40,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:40,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:40,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:32:40,747 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:40,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1475267960, now seen corresponding path program 1 times [2024-06-21 20:32:40,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:40,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430936100] [2024-06-21 20:32:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:40,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:41,839 INFO 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 20:32:41,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:41,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430936100] [2024-06-21 20:32:41,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430936100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:41,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:41,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370123846] [2024-06-21 20:32:41,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:41,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:41,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:41,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:41,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:41,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:41,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 163 transitions, 1319 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:41,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:41,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:41,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:44,275 INFO L124 PetriNetUnfolderBase]: 11550/16291 cut-off events. [2024-06-21 20:32:44,275 INFO L125 PetriNetUnfolderBase]: For 495519/495524 co-relation queries the response was YES. [2024-06-21 20:32:44,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102845 conditions, 16291 events. 11550/16291 cut-off events. For 495519/495524 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 93601 event pairs, 4679 based on Foata normal form. 18/16176 useless extension candidates. Maximal degree in co-relation 102798. Up to 14825 conditions per place. [2024-06-21 20:32:44,401 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 142 selfloop transitions, 79 changer transitions 0/234 dead transitions. [2024-06-21 20:32:44,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 234 transitions, 2156 flow [2024-06-21 20:32:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-21 20:32:44,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-21 20:32:44,403 INFO L175 Difference]: Start difference. First operand has 123 places, 163 transitions, 1319 flow. Second operand 9 states and 246 transitions. [2024-06-21 20:32:44,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 234 transitions, 2156 flow [2024-06-21 20:32:44,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 234 transitions, 2099 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:44,685 INFO L231 Difference]: Finished difference. Result has 129 places, 179 transitions, 1678 flow [2024-06-21 20:32:44,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1678, PETRI_PLACES=129, PETRI_TRANSITIONS=179} [2024-06-21 20:32:44,685 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-21 20:32:44,686 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 179 transitions, 1678 flow [2024-06-21 20:32:44,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:44,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:44,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:44,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:32:44,686 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:44,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1883349352, now seen corresponding path program 1 times [2024-06-21 20:32:44,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:44,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661088341] [2024-06-21 20:32:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:45,543 INFO 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 20:32:45,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661088341] [2024-06-21 20:32:45,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661088341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:45,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:45,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:45,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378500518] [2024-06-21 20:32:45,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:45,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:45,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:45,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:45,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:45,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 179 transitions, 1678 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:45,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:45,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:45,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:47,945 INFO L124 PetriNetUnfolderBase]: 11383/16126 cut-off events. [2024-06-21 20:32:47,945 INFO L125 PetriNetUnfolderBase]: For 521380/521403 co-relation queries the response was YES. [2024-06-21 20:32:47,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103641 conditions, 16126 events. 11383/16126 cut-off events. For 521380/521403 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 93339 event pairs, 4911 based on Foata normal form. 24/16109 useless extension candidates. Maximal degree in co-relation 103591. Up to 15304 conditions per place. [2024-06-21 20:32:48,072 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 155 selfloop transitions, 45 changer transitions 0/219 dead transitions. [2024-06-21 20:32:48,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2412 flow [2024-06-21 20:32:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 20:32:48,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-21 20:32:48,074 INFO L175 Difference]: Start difference. First operand has 129 places, 179 transitions, 1678 flow. Second operand 7 states and 187 transitions. [2024-06-21 20:32:48,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2412 flow [2024-06-21 20:32:48,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 219 transitions, 2250 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:48,421 INFO L231 Difference]: Finished difference. Result has 132 places, 187 transitions, 1763 flow [2024-06-21 20:32:48,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1763, PETRI_PLACES=132, PETRI_TRANSITIONS=187} [2024-06-21 20:32:48,422 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-21 20:32:48,422 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 187 transitions, 1763 flow [2024-06-21 20:32:48,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:48,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:48,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:48,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:32:48,423 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:48,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash -963832916, now seen corresponding path program 2 times [2024-06-21 20:32:48,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:48,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980060364] [2024-06-21 20:32:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:49,505 INFO 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 20:32:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980060364] [2024-06-21 20:32:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980060364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:49,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834479205] [2024-06-21 20:32:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:49,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:49,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:49,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:49,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 187 transitions, 1763 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:49,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:49,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:49,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:51,944 INFO L124 PetriNetUnfolderBase]: 11832/16755 cut-off events. [2024-06-21 20:32:51,944 INFO L125 PetriNetUnfolderBase]: For 583181/583186 co-relation queries the response was YES. [2024-06-21 20:32:52,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112112 conditions, 16755 events. 11832/16755 cut-off events. For 583181/583186 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97249 event pairs, 4703 based on Foata normal form. 18/16658 useless extension candidates. Maximal degree in co-relation 112061. Up to 15398 conditions per place. [2024-06-21 20:32:52,111 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 152 selfloop transitions, 86 changer transitions 0/251 dead transitions. [2024-06-21 20:32:52,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 251 transitions, 2580 flow [2024-06-21 20:32:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-21 20:32:52,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 20:32:52,113 INFO L175 Difference]: Start difference. First operand has 132 places, 187 transitions, 1763 flow. Second operand 9 states and 243 transitions. [2024-06-21 20:32:52,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 251 transitions, 2580 flow [2024-06-21 20:32:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 251 transitions, 2504 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:52,616 INFO L231 Difference]: Finished difference. Result has 140 places, 199 transitions, 2072 flow [2024-06-21 20:32:52,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2072, PETRI_PLACES=140, PETRI_TRANSITIONS=199} [2024-06-21 20:32:52,616 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-21 20:32:52,617 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 199 transitions, 2072 flow [2024-06-21 20:32:52,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:52,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:52,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:52,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:32:52,617 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:52,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:52,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1373728166, now seen corresponding path program 3 times [2024-06-21 20:32:52,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:52,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806521626] [2024-06-21 20:32:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:52,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:53,701 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 20:32:53,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:53,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806521626] [2024-06-21 20:32:53,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806521626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:53,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:53,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:53,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078340008] [2024-06-21 20:32:53,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:53,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:53,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:53,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:53,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:53,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 199 transitions, 2072 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:53,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:53,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:53,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:56,827 INFO L124 PetriNetUnfolderBase]: 12033/17069 cut-off events. [2024-06-21 20:32:56,827 INFO L125 PetriNetUnfolderBase]: For 642116/642137 co-relation queries the response was YES. [2024-06-21 20:32:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117623 conditions, 17069 events. 12033/17069 cut-off events. For 642116/642137 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 99572 event pairs, 4349 based on Foata normal form. 18/16969 useless extension candidates. Maximal degree in co-relation 117568. Up to 14728 conditions per place. [2024-06-21 20:32:56,968 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 141 selfloop transitions, 106 changer transitions 0/260 dead transitions. [2024-06-21 20:32:56,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 260 transitions, 3062 flow [2024-06-21 20:32:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-21 20:32:56,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136268343815513 [2024-06-21 20:32:56,970 INFO L175 Difference]: Start difference. First operand has 140 places, 199 transitions, 2072 flow. Second operand 9 states and 245 transitions. [2024-06-21 20:32:56,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 260 transitions, 3062 flow [2024-06-21 20:32:57,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 260 transitions, 2907 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:57,471 INFO L231 Difference]: Finished difference. Result has 147 places, 205 transitions, 2381 flow [2024-06-21 20:32:57,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2381, PETRI_PLACES=147, PETRI_TRANSITIONS=205} [2024-06-21 20:32:57,472 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-21 20:32:57,472 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 205 transitions, 2381 flow [2024-06-21 20:32:57,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:57,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:57,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:57,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:32:57,472 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:32:57,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:57,473 INFO L85 PathProgramCache]: Analyzing trace with hash -114426504, now seen corresponding path program 4 times [2024-06-21 20:32:57,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:57,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042664662] [2024-06-21 20:32:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:57,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:58,771 INFO 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 20:32:58,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042664662] [2024-06-21 20:32:58,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042664662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:58,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:58,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:58,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404343341] [2024-06-21 20:32:58,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:58,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:58,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:58,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:32:58,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 205 transitions, 2381 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:58,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:58,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:32:58,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:01,319 INFO L124 PetriNetUnfolderBase]: 11977/17005 cut-off events. [2024-06-21 20:33:01,319 INFO L125 PetriNetUnfolderBase]: For 669238/669243 co-relation queries the response was YES. [2024-06-21 20:33:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117360 conditions, 17005 events. 11977/17005 cut-off events. For 669238/669243 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 99155 event pairs, 4730 based on Foata normal form. 18/16913 useless extension candidates. Maximal degree in co-relation 117303. Up to 15621 conditions per place. [2024-06-21 20:33:01,479 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 159 selfloop transitions, 84 changer transitions 0/256 dead transitions. [2024-06-21 20:33:01,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 256 transitions, 3007 flow [2024-06-21 20:33:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:33:01,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:33:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-21 20:33:01,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 20:33:01,480 INFO L175 Difference]: Start difference. First operand has 147 places, 205 transitions, 2381 flow. Second operand 9 states and 243 transitions. [2024-06-21 20:33:01,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 256 transitions, 3007 flow [2024-06-21 20:33:02,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 256 transitions, 2829 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:02,073 INFO L231 Difference]: Finished difference. Result has 150 places, 204 transitions, 2334 flow [2024-06-21 20:33:02,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2334, PETRI_PLACES=150, PETRI_TRANSITIONS=204} [2024-06-21 20:33:02,073 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-21 20:33:02,073 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 204 transitions, 2334 flow [2024-06-21 20:33:02,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:02,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:02,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:02,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:33:02,074 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:02,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:02,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1042284480, now seen corresponding path program 2 times [2024-06-21 20:33:02,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:02,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098535917] [2024-06-21 20:33:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:02,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:03,060 INFO 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 20:33:03,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:03,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098535917] [2024-06-21 20:33:03,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098535917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:03,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:03,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:03,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424999284] [2024-06-21 20:33:03,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:03,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:03,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:03,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:03,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 204 transitions, 2334 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:03,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:03,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:05,712 INFO L124 PetriNetUnfolderBase]: 11745/16717 cut-off events. [2024-06-21 20:33:05,713 INFO L125 PetriNetUnfolderBase]: For 671982/672063 co-relation queries the response was YES. [2024-06-21 20:33:05,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114557 conditions, 16717 events. 11745/16717 cut-off events. For 671982/672063 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97952 event pairs, 4959 based on Foata normal form. 29/16663 useless extension candidates. Maximal degree in co-relation 114498. Up to 15847 conditions per place. [2024-06-21 20:33:05,875 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 165 selfloop transitions, 50 changer transitions 0/234 dead transitions. [2024-06-21 20:33:05,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 3032 flow [2024-06-21 20:33:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:33:05,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-21 20:33:05,876 INFO L175 Difference]: Start difference. First operand has 150 places, 204 transitions, 2334 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:33:05,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 3032 flow [2024-06-21 20:33:06,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 234 transitions, 2754 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 20:33:06,328 INFO L231 Difference]: Finished difference. Result has 149 places, 208 transitions, 2241 flow [2024-06-21 20:33:06,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2241, PETRI_PLACES=149, PETRI_TRANSITIONS=208} [2024-06-21 20:33:06,329 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-21 20:33:06,329 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 208 transitions, 2241 flow [2024-06-21 20:33:06,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:06,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:06,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:06,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:33:06,330 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:06,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:06,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1041868770, now seen corresponding path program 3 times [2024-06-21 20:33:06,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:06,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159885418] [2024-06-21 20:33:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:06,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:07,390 INFO 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 20:33:07,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159885418] [2024-06-21 20:33:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159885418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:07,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:07,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:07,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160499372] [2024-06-21 20:33:07,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:07,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:07,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:07,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 208 transitions, 2241 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:07,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:07,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:07,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:09,787 INFO L124 PetriNetUnfolderBase]: 11725/16685 cut-off events. [2024-06-21 20:33:09,788 INFO L125 PetriNetUnfolderBase]: For 693107/693188 co-relation queries the response was YES. [2024-06-21 20:33:09,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114274 conditions, 16685 events. 11725/16685 cut-off events. For 693107/693188 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97711 event pairs, 4953 based on Foata normal form. 25/16631 useless extension candidates. Maximal degree in co-relation 114216. Up to 15833 conditions per place. [2024-06-21 20:33:09,937 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 165 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-06-21 20:33:09,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 233 transitions, 2743 flow [2024-06-21 20:33:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:33:09,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-21 20:33:09,938 INFO L175 Difference]: Start difference. First operand has 149 places, 208 transitions, 2241 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:33:09,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 233 transitions, 2743 flow [2024-06-21 20:33:10,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 233 transitions, 2563 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:10,663 INFO L231 Difference]: Finished difference. Result has 152 places, 208 transitions, 2168 flow [2024-06-21 20:33:10,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2168, PETRI_PLACES=152, PETRI_TRANSITIONS=208} [2024-06-21 20:33:10,663 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-21 20:33:10,663 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 208 transitions, 2168 flow [2024-06-21 20:33:10,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:10,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:10,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:10,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:33:10,664 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:10,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:10,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1035619356, now seen corresponding path program 1 times [2024-06-21 20:33:10,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:10,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459561126] [2024-06-21 20:33:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:10,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:11,557 INFO 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 20:33:11,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:11,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459561126] [2024-06-21 20:33:11,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459561126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:11,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:11,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:11,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425150313] [2024-06-21 20:33:11,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:11,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:11,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:11,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:11,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:11,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:11,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 208 transitions, 2168 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:11,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:11,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:11,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:14,100 INFO L124 PetriNetUnfolderBase]: 11105/15953 cut-off events. [2024-06-21 20:33:14,100 INFO L125 PetriNetUnfolderBase]: For 622491/622493 co-relation queries the response was YES. [2024-06-21 20:33:14,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107828 conditions, 15953 events. 11105/15953 cut-off events. For 622491/622493 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 93651 event pairs, 4330 based on Foata normal form. 2/15915 useless extension candidates. Maximal degree in co-relation 107769. Up to 15215 conditions per place. [2024-06-21 20:33:14,235 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 214 selfloop transitions, 18 changer transitions 0/240 dead transitions. [2024-06-21 20:33:14,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 240 transitions, 2800 flow [2024-06-21 20:33:14,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:33:14,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-21 20:33:14,236 INFO L175 Difference]: Start difference. First operand has 152 places, 208 transitions, 2168 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:33:14,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 240 transitions, 2800 flow [2024-06-21 20:33:14,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 240 transitions, 2660 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:33:14,979 INFO L231 Difference]: Finished difference. Result has 152 places, 212 transitions, 2161 flow [2024-06-21 20:33:14,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2161, PETRI_PLACES=152, PETRI_TRANSITIONS=212} [2024-06-21 20:33:14,979 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-21 20:33:14,979 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 212 transitions, 2161 flow [2024-06-21 20:33:14,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:14,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:14,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:14,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:33:14,980 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:14,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:14,980 INFO L85 PathProgramCache]: Analyzing trace with hash 864921762, now seen corresponding path program 1 times [2024-06-21 20:33:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:14,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485157053] [2024-06-21 20:33:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:14,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:15,819 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 20:33:15,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:15,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485157053] [2024-06-21 20:33:15,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485157053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:15,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:15,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:15,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034700453] [2024-06-21 20:33:15,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:15,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:15,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:15,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:15,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:15,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 212 transitions, 2161 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:15,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:15,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:15,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:18,423 INFO L124 PetriNetUnfolderBase]: 11137/15997 cut-off events. [2024-06-21 20:33:18,423 INFO L125 PetriNetUnfolderBase]: For 663255/663260 co-relation queries the response was YES. [2024-06-21 20:33:18,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111027 conditions, 15997 events. 11137/15997 cut-off events. For 663255/663260 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 93871 event pairs, 4305 based on Foata normal form. 4/15957 useless extension candidates. Maximal degree in co-relation 110967. Up to 15184 conditions per place. [2024-06-21 20:33:18,547 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 211 selfloop transitions, 31 changer transitions 0/250 dead transitions. [2024-06-21 20:33:18,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 250 transitions, 3017 flow [2024-06-21 20:33:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:33:18,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-21 20:33:18,548 INFO L175 Difference]: Start difference. First operand has 152 places, 212 transitions, 2161 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:33:18,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 250 transitions, 3017 flow [2024-06-21 20:33:19,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 250 transitions, 2914 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:19,249 INFO L231 Difference]: Finished difference. Result has 154 places, 220 transitions, 2293 flow [2024-06-21 20:33:19,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2293, PETRI_PLACES=154, PETRI_TRANSITIONS=220} [2024-06-21 20:33:19,249 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-21 20:33:19,249 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 220 transitions, 2293 flow [2024-06-21 20:33:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:19,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:19,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:19,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:33:19,250 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:19,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:19,250 INFO L85 PathProgramCache]: Analyzing trace with hash 864921576, now seen corresponding path program 2 times [2024-06-21 20:33:19,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:19,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601498993] [2024-06-21 20:33:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:19,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:20,241 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 20:33:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601498993] [2024-06-21 20:33:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601498993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:20,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:20,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:20,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111567677] [2024-06-21 20:33:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:20,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:20,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:20,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:20,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:20,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 220 transitions, 2293 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:20,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:20,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:20,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:22,935 INFO L124 PetriNetUnfolderBase]: 11153/16030 cut-off events. [2024-06-21 20:33:22,936 INFO L125 PetriNetUnfolderBase]: For 704621/704626 co-relation queries the response was YES. [2024-06-21 20:33:23,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114330 conditions, 16030 events. 11153/16030 cut-off events. For 704621/704626 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 94163 event pairs, 4320 based on Foata normal form. 4/15986 useless extension candidates. Maximal degree in co-relation 114269. Up to 15231 conditions per place. [2024-06-21 20:33:23,082 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 212 selfloop transitions, 35 changer transitions 0/255 dead transitions. [2024-06-21 20:33:23,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 255 transitions, 3185 flow [2024-06-21 20:33:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:33:23,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-21 20:33:23,083 INFO L175 Difference]: Start difference. First operand has 154 places, 220 transitions, 2293 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:33:23,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 255 transitions, 3185 flow [2024-06-21 20:33:23,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 255 transitions, 3089 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:23,828 INFO L231 Difference]: Finished difference. Result has 158 places, 228 transitions, 2468 flow [2024-06-21 20:33:23,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2468, PETRI_PLACES=158, PETRI_TRANSITIONS=228} [2024-06-21 20:33:23,828 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-21 20:33:23,828 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 228 transitions, 2468 flow [2024-06-21 20:33:23,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:23,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:23,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:23,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:33:23,829 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:23,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1510790050, now seen corresponding path program 2 times [2024-06-21 20:33:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:23,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622615008] [2024-06-21 20:33:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:23,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:24,823 INFO 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 20:33:24,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:24,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622615008] [2024-06-21 20:33:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622615008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:24,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540992373] [2024-06-21 20:33:24,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:24,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:24,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:24,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:24,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 228 transitions, 2468 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:24,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:24,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:24,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:27,857 INFO L124 PetriNetUnfolderBase]: 11185/16068 cut-off events. [2024-06-21 20:33:27,858 INFO L125 PetriNetUnfolderBase]: For 753715/753723 co-relation queries the response was YES. [2024-06-21 20:33:27,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117733 conditions, 16068 events. 11185/16068 cut-off events. For 753715/753723 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 94141 event pairs, 4278 based on Foata normal form. 8/16032 useless extension candidates. Maximal degree in co-relation 117670. Up to 15234 conditions per place. [2024-06-21 20:33:28,006 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 214 selfloop transitions, 36 changer transitions 0/258 dead transitions. [2024-06-21 20:33:28,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 258 transitions, 3258 flow [2024-06-21 20:33:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:33:28,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-21 20:33:28,007 INFO L175 Difference]: Start difference. First operand has 158 places, 228 transitions, 2468 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:33:28,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 258 transitions, 3258 flow [2024-06-21 20:33:29,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 258 transitions, 3146 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 20:33:29,012 INFO L231 Difference]: Finished difference. Result has 162 places, 232 transitions, 2515 flow [2024-06-21 20:33:29,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2515, PETRI_PLACES=162, PETRI_TRANSITIONS=232} [2024-06-21 20:33:29,013 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-21 20:33:29,013 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 232 transitions, 2515 flow [2024-06-21 20:33:29,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:29,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:29,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:29,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:33:29,013 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:29,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:29,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1042053096, now seen corresponding path program 3 times [2024-06-21 20:33:29,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:29,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028379714] [2024-06-21 20:33:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:29,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:29,937 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 20:33:29,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:29,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028379714] [2024-06-21 20:33:29,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028379714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:29,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:29,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772121664] [2024-06-21 20:33:29,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:29,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:29,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:30,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:30,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 232 transitions, 2515 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:30,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:30,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:30,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:32,790 INFO L124 PetriNetUnfolderBase]: 11178/16066 cut-off events. [2024-06-21 20:33:32,790 INFO L125 PetriNetUnfolderBase]: For 783726/783731 co-relation queries the response was YES. [2024-06-21 20:33:32,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118656 conditions, 16066 events. 11178/16066 cut-off events. For 783726/783731 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 94173 event pairs, 4330 based on Foata normal form. 2/16017 useless extension candidates. Maximal degree in co-relation 118591. Up to 15266 conditions per place. [2024-06-21 20:33:32,934 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 211 selfloop transitions, 35 changer transitions 0/254 dead transitions. [2024-06-21 20:33:32,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 254 transitions, 3075 flow [2024-06-21 20:33:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:33:32,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-21 20:33:32,935 INFO L175 Difference]: Start difference. First operand has 162 places, 232 transitions, 2515 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:33:32,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 254 transitions, 3075 flow [2024-06-21 20:33:33,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 254 transitions, 2897 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:33,905 INFO L231 Difference]: Finished difference. Result has 165 places, 232 transitions, 2416 flow [2024-06-21 20:33:33,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2416, PETRI_PLACES=165, PETRI_TRANSITIONS=232} [2024-06-21 20:33:33,906 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-06-21 20:33:33,906 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 232 transitions, 2416 flow [2024-06-21 20:33:33,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:33,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:33,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:33,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:33:33,906 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:33:33,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash 869563392, now seen corresponding path program 3 times [2024-06-21 20:33:33,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:33,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232406303] [2024-06-21 20:33:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:33,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:34,850 INFO 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 20:33:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232406303] [2024-06-21 20:33:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232406303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:34,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878099390] [2024-06-21 20:33:34,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:34,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:34,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 20:33:34,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 232 transitions, 2416 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:34,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:34,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 20:33:34,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand