./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_power.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/protection/safe025_power.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe025_power.i ./goblint.2024-06-19_11-23-25.files/protection/safe025_power.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-7724a2d-m [2024-06-27 21:26:40,054 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:26:40,150 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:26:40,155 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:26:40,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:26:40,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:26:40,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:26:40,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:26:40,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:26:40,190 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:26:40,191 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:26:40,191 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:26:40,192 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:26:40,194 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:26:40,194 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:26:40,194 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:26:40,195 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:26:40,195 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:26:40,195 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:26:40,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:26:40,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:26:40,196 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:26:40,197 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:26:40,197 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:26:40,197 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:26:40,197 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:26:40,198 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:26:40,198 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:26:40,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:26:40,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:26:40,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:26:40,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:26:40,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:26:40,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:26:40,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:26:40,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:26:40,202 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:26:40,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:26:40,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:26:40,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:26:40,203 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:26:40,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:26:40,203 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:26:40,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:26:40,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:26:40,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:26:40,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:26:40,514 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:26:40,515 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:26:40,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_power.i [2024-06-27 21:26:41,635 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:26:41,921 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:26:41,925 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_power.i [2024-06-27 21:26:41,944 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aa602242/2b66cc3008194f7f9eb9092a74cde302/FLAGe558f520d [2024-06-27 21:26:41,958 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7aa602242/2b66cc3008194f7f9eb9092a74cde302 [2024-06-27 21:26:41,960 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:26:41,961 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:26:41,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe025_power.yml/witness.yml [2024-06-27 21:26:42,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:26:42,190 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:26:42,191 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:26:42,191 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:26:42,196 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:26:42,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:26:41" (1/2) ... [2024-06-27 21:26:42,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a0a31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:42, skipping insertion in model container [2024-06-27 21:26:42,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:26:41" (1/2) ... [2024-06-27 21:26:42,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b7478d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:42, skipping insertion in model container [2024-06-27 21:26:42,201 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:42" (2/2) ... [2024-06-27 21:26:42,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a0a31f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:42, skipping insertion in model container [2024-06-27 21:26:42,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:42" (2/2) ... [2024-06-27 21:26:42,201 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:26:42,356 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:26:42,357 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) [2024-06-27 21:26:42,358 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) [2024-06-27 21:26:42,358 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) [2024-06-27 21:26:42,358 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:26:42,358 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-27 21:26:42,428 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:26:42,805 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:26:42,817 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:26:42,974 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:26:43,026 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:26:43,026 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43 WrapperNode [2024-06-27 21:26:43,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:26:43,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:26:43,028 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:26:43,028 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:26:43,035 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 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,062 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 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,108 INFO L138 Inliner]: procedures = 175, calls = 93, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 288 [2024-06-27 21:26:43,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:26:43,109 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:26:43,109 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:26:43,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:26:43,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,142 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,161 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-27 21:26:43,162 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,176 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,179 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,210 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:26:43,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:26:43,211 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:26:43,211 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:26:43,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (1/1) ... [2024-06-27 21:26:43,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:26:43,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:26:43,243 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) [2024-06-27 21:26:43,249 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 [2024-06-27 21:26:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:26:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:26:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:26:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:26:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:26:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:26:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:26:43,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:26:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:26:43,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:26:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:26:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:26:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:26:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:26:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:26:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:26:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:26:43,289 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:26:43,426 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:26:43,428 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:26:43,935 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:26:43,935 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:26:44,464 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:26:44,464 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:26:44,465 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:26:44 BoogieIcfgContainer [2024-06-27 21:26:44,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:26:44,468 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:26:44,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:26:44,471 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:26:44,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:26:41" (1/4) ... [2024-06-27 21:26:44,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759a429b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:26:44, skipping insertion in model container [2024-06-27 21:26:44,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:42" (2/4) ... [2024-06-27 21:26:44,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759a429b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:26:44, skipping insertion in model container [2024-06-27 21:26:44,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:43" (3/4) ... [2024-06-27 21:26:44,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759a429b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:26:44, skipping insertion in model container [2024-06-27 21:26:44,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:26:44" (4/4) ... [2024-06-27 21:26:44,474 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_power.i [2024-06-27 21:26:44,492 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:26:44,492 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:26:44,492 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:26:44,575 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:26:44,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 21:26:44,683 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 21:26:44,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:26:44,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:26:44,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 21:26:44,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 21:26:44,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:26:44,712 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;@674e412b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:26:44,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:26:44,717 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:26:44,717 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:26:44,717 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:26:44,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:44,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:26:44,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:44,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash 982391244, now seen corresponding path program 1 times [2024-06-27 21:26:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:44,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098091322] [2024-06-27 21:26:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:44,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:46,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:46,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098091322] [2024-06-27 21:26:46,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098091322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:46,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:46,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:26:46,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002076778] [2024-06-27 21:26:46,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:46,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:26:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:26:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:26:46,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 21:26:46,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:46,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:46,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 21:26:46,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:47,249 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-27 21:26:47,250 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 21:26:47,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1912 events. 1205/1912 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9523 event pairs, 800 based on Foata normal form. 1/1878 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-27 21:26:47,266 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-27 21:26:47,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-27 21:26:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:26:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:26:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 21:26:47,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-27 21:26:47,279 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-27 21:26:47,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-27 21:26:47,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:47,284 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 21:26:47,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 21:26:47,288 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 21:26:47,289 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 21:26:47,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:47,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:47,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:47,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:26:47,290 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:47,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:47,290 INFO L85 PathProgramCache]: Analyzing trace with hash -813798585, now seen corresponding path program 1 times [2024-06-27 21:26:47,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:47,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099868211] [2024-06-27 21:26:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:47,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:48,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:48,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099868211] [2024-06-27 21:26:48,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099868211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:48,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:48,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:26:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175502673] [2024-06-27 21:26:48,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:48,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:26:48,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:26:48,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:26:49,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:26:49,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:49,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:49,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:26:49,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:49,727 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-27 21:26:49,727 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-27 21:26:49,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10218 event pairs, 654 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-27 21:26:49,740 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-27 21:26:49,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-27 21:26:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:26:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:26:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-27 21:26:49,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-27 21:26:49,743 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-27 21:26:49,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-27 21:26:49,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:49,749 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 21:26:49,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 21:26:49,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 21:26:49,752 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 21:26:49,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:49,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:49,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:49,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:26:49,759 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:49,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash -894569915, now seen corresponding path program 1 times [2024-06-27 21:26:49,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:49,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715921992] [2024-06-27 21:26:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:52,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:52,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715921992] [2024-06-27 21:26:52,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715921992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:52,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:52,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:26:52,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781079772] [2024-06-27 21:26:52,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:52,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:26:52,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:52,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:26:52,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:26:52,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:26:52,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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) [2024-06-27 21:26:52,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:52,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:26:52,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:53,152 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-27 21:26:53,153 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-27 21:26:53,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10082 event pairs, 485 based on Foata normal form. 6/2121 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-27 21:26:53,165 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-27 21:26:53,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-27 21:26:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 21:26:53,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-27 21:26:53,168 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-27 21:26:53,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-27 21:26:53,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:53,171 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-27 21:26:53,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 21:26:53,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-27 21:26:53,172 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-27 21:26:53,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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) [2024-06-27 21:26:53,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:53,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:53,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:26:53,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:53,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1485590559, now seen corresponding path program 1 times [2024-06-27 21:26:53,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:53,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582309716] [2024-06-27 21:26:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:53,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582309716] [2024-06-27 21:26:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582309716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:54,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:54,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:26:54,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263726650] [2024-06-27 21:26:54,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:26:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:26:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:26:54,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:26:54,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:54,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:54,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:26:54,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:55,353 INFO L124 PetriNetUnfolderBase]: 1179/1872 cut-off events. [2024-06-27 21:26:55,353 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2024-06-27 21:26:55,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 1872 events. 1179/1872 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9251 event pairs, 492 based on Foata normal form. 2/1873 useless extension candidates. Maximal degree in co-relation 5155. Up to 1767 conditions per place. [2024-06-27 21:26:55,370 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 21:26:55,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 341 flow [2024-06-27 21:26:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:26:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:26:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 21:26:55,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 21:26:55,371 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 94 transitions. [2024-06-27 21:26:55,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 341 flow [2024-06-27 21:26:55,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:55,375 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-27 21:26:55,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 21:26:55,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 21:26:55,377 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-27 21:26:55,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:55,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:55,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:55,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:26:55,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:55,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1191331043, now seen corresponding path program 1 times [2024-06-27 21:26:55,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:55,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168549049] [2024-06-27 21:26:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:55,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:55,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:55,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168549049] [2024-06-27 21:26:55,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168549049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:55,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:55,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:26:55,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448861043] [2024-06-27 21:26:55,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:55,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:26:55,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:55,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:26:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:26:55,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 21:26:55,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:55,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:55,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 21:26:55,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:55,887 INFO L124 PetriNetUnfolderBase]: 717/1268 cut-off events. [2024-06-27 21:26:55,887 INFO L125 PetriNetUnfolderBase]: For 1669/1703 co-relation queries the response was YES. [2024-06-27 21:26:55,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 1268 events. 717/1268 cut-off events. For 1669/1703 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7228 event pairs, 322 based on Foata normal form. 109/1311 useless extension candidates. Maximal degree in co-relation 3606. Up to 776 conditions per place. [2024-06-27 21:26:55,897 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 34 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-27 21:26:55,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 339 flow [2024-06-27 21:26:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:26:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:26:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-27 21:26:55,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-27 21:26:55,899 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 3 states and 78 transitions. [2024-06-27 21:26:55,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 339 flow [2024-06-27 21:26:55,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 320 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:55,902 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 235 flow [2024-06-27 21:26:55,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-27 21:26:55,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 21:26:55,904 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 235 flow [2024-06-27 21:26:55,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:55,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:55,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:55,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:26:55,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:55,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1723199168, now seen corresponding path program 1 times [2024-06-27 21:26:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:55,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015381592] [2024-06-27 21:26:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:55,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:57,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:57,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015381592] [2024-06-27 21:26:57,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015381592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:57,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:57,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:26:57,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454393258] [2024-06-27 21:26:57,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:57,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:26:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:26:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:26:57,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:26:57,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:57,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:57,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:26:57,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:58,762 INFO L124 PetriNetUnfolderBase]: 1519/2370 cut-off events. [2024-06-27 21:26:58,763 INFO L125 PetriNetUnfolderBase]: For 5035/5035 co-relation queries the response was YES. [2024-06-27 21:26:58,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 2370 events. 1519/2370 cut-off events. For 5035/5035 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11906 event pairs, 667 based on Foata normal form. 4/2373 useless extension candidates. Maximal degree in co-relation 7794. Up to 2277 conditions per place. [2024-06-27 21:26:58,780 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-27 21:26:58,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 480 flow [2024-06-27 21:26:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:26:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:26:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 21:26:58,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 21:26:58,782 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 235 flow. Second operand 6 states and 111 transitions. [2024-06-27 21:26:58,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 480 flow [2024-06-27 21:26:58,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 462 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:26:58,787 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-27 21:26:58,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 21:26:58,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 21:26:58,789 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-27 21:26:58,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:58,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:58,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:58,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:26:58,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:58,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1723436318, now seen corresponding path program 2 times [2024-06-27 21:26:58,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:58,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937857412] [2024-06-27 21:26:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:00,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937857412] [2024-06-27 21:27:00,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937857412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:00,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:00,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344075875] [2024-06-27 21:27:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:00,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:00,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:00,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:00,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:00,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:00,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:01,315 INFO L124 PetriNetUnfolderBase]: 1511/2351 cut-off events. [2024-06-27 21:27:01,315 INFO L125 PetriNetUnfolderBase]: For 6082/6082 co-relation queries the response was YES. [2024-06-27 21:27:01,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8124 conditions, 2351 events. 1511/2351 cut-off events. For 6082/6082 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11886 event pairs, 674 based on Foata normal form. 4/2352 useless extension candidates. Maximal degree in co-relation 8103. Up to 2232 conditions per place. [2024-06-27 21:27:01,334 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-27 21:27:01,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 541 flow [2024-06-27 21:27:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:27:01,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 21:27:01,336 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:27:01,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 541 flow [2024-06-27 21:27:01,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 502 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:01,341 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 351 flow [2024-06-27 21:27:01,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-27 21:27:01,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-27 21:27:01,343 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 351 flow [2024-06-27 21:27:01,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:01,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:01,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:01,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:27:01,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:01,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash -454984031, now seen corresponding path program 1 times [2024-06-27 21:27:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:01,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555083144] [2024-06-27 21:27:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:01,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:03,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555083144] [2024-06-27 21:27:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555083144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:03,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:03,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721018833] [2024-06-27 21:27:03,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:03,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:03,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:03,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 351 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:03,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:03,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:03,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:04,714 INFO L124 PetriNetUnfolderBase]: 1548/2427 cut-off events. [2024-06-27 21:27:04,714 INFO L125 PetriNetUnfolderBase]: For 8302/8302 co-relation queries the response was YES. [2024-06-27 21:27:04,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8932 conditions, 2427 events. 1548/2427 cut-off events. For 8302/8302 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12314 event pairs, 665 based on Foata normal form. 2/2428 useless extension candidates. Maximal degree in co-relation 8910. Up to 2313 conditions per place. [2024-06-27 21:27:04,732 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-06-27 21:27:04,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 704 flow [2024-06-27 21:27:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:27:04,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:27:04,738 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 351 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:27:04,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 704 flow [2024-06-27 21:27:04,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 641 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:04,746 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 424 flow [2024-06-27 21:27:04,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=424, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 21:27:04,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-27 21:27:04,749 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 424 flow [2024-06-27 21:27:04,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:04,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:04,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:04,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:27:04,750 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:04,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1985156841, now seen corresponding path program 2 times [2024-06-27 21:27:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495021805] [2024-06-27 21:27:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:06,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:06,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495021805] [2024-06-27 21:27:06,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495021805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:06,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:06,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:06,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614482307] [2024-06-27 21:27:06,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:06,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:06,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:06,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:06,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:06,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:06,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:06,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:06,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:08,164 INFO L124 PetriNetUnfolderBase]: 1545/2422 cut-off events. [2024-06-27 21:27:08,164 INFO L125 PetriNetUnfolderBase]: For 10269/10269 co-relation queries the response was YES. [2024-06-27 21:27:08,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 2422 events. 1545/2422 cut-off events. For 10269/10269 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12308 event pairs, 664 based on Foata normal form. 2/2423 useless extension candidates. Maximal degree in co-relation 9331. Up to 2278 conditions per place. [2024-06-27 21:27:08,179 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 75 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-27 21:27:08,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 732 flow [2024-06-27 21:27:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:27:08,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:27:08,181 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 424 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:27:08,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 732 flow [2024-06-27 21:27:08,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 689 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:08,193 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 465 flow [2024-06-27 21:27:08,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-27 21:27:08,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-27 21:27:08,195 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 465 flow [2024-06-27 21:27:08,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:08,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:08,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:08,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:27:08,196 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:08,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1900811076, now seen corresponding path program 1 times [2024-06-27 21:27:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988040567] [2024-06-27 21:27:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:08,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:10,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988040567] [2024-06-27 21:27:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988040567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:10,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:10,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:27:10,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549518050] [2024-06-27 21:27:10,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:10,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:27:10,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:10,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:27:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:27:10,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:10,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:10,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:10,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:10,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:11,064 INFO L124 PetriNetUnfolderBase]: 1289/2078 cut-off events. [2024-06-27 21:27:11,064 INFO L125 PetriNetUnfolderBase]: For 10603/10603 co-relation queries the response was YES. [2024-06-27 21:27:11,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8387 conditions, 2078 events. 1289/2078 cut-off events. For 10603/10603 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10693 event pairs, 524 based on Foata normal form. 2/2079 useless extension candidates. Maximal degree in co-relation 8361. Up to 1982 conditions per place. [2024-06-27 21:27:11,079 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 70 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2024-06-27 21:27:11,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 671 flow [2024-06-27 21:27:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:27:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:27:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:27:11,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:27:11,081 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 465 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:27:11,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 671 flow [2024-06-27 21:27:11,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 609 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:11,094 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 449 flow [2024-06-27 21:27:11,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-27 21:27:11,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-27 21:27:11,096 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 449 flow [2024-06-27 21:27:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:11,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:11,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:11,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:27:11,097 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:11,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1916018691, now seen corresponding path program 1 times [2024-06-27 21:27:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752835354] [2024-06-27 21:27:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:11,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:11,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752835354] [2024-06-27 21:27:11,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752835354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:11,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:11,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:11,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374718856] [2024-06-27 21:27:11,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:11,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:27:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:11,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:27:11,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:27:11,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 21:27:11,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 449 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:11,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:11,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 21:27:11,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:11,690 INFO L124 PetriNetUnfolderBase]: 814/1489 cut-off events. [2024-06-27 21:27:11,691 INFO L125 PetriNetUnfolderBase]: For 8092/8193 co-relation queries the response was YES. [2024-06-27 21:27:11,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5821 conditions, 1489 events. 814/1489 cut-off events. For 8092/8193 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8652 event pairs, 306 based on Foata normal form. 89/1504 useless extension candidates. Maximal degree in co-relation 5794. Up to 728 conditions per place. [2024-06-27 21:27:11,701 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 37 selfloop transitions, 24 changer transitions 0/81 dead transitions. [2024-06-27 21:27:11,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 603 flow [2024-06-27 21:27:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:27:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:27:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-27 21:27:11,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 21:27:11,703 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 449 flow. Second operand 5 states and 101 transitions. [2024-06-27 21:27:11,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 603 flow [2024-06-27 21:27:11,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 581 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:11,709 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 497 flow [2024-06-27 21:27:11,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-27 21:27:11,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-27 21:27:11,710 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 497 flow [2024-06-27 21:27:11,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:11,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:11,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:11,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:27:11,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:11,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:11,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1174171586, now seen corresponding path program 1 times [2024-06-27 21:27:11,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:11,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536775831] [2024-06-27 21:27:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:11,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:13,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536775831] [2024-06-27 21:27:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536775831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:13,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:13,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315458028] [2024-06-27 21:27:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:13,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:13,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:13,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 497 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:13,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:13,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:13,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:14,634 INFO L124 PetriNetUnfolderBase]: 1483/2377 cut-off events. [2024-06-27 21:27:14,634 INFO L125 PetriNetUnfolderBase]: For 13065/13065 co-relation queries the response was YES. [2024-06-27 21:27:14,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10019 conditions, 2377 events. 1483/2377 cut-off events. For 13065/13065 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12307 event pairs, 526 based on Foata normal form. 4/2380 useless extension candidates. Maximal degree in co-relation 9991. Up to 2143 conditions per place. [2024-06-27 21:27:14,648 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 24 changer transitions 0/122 dead transitions. [2024-06-27 21:27:14,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 893 flow [2024-06-27 21:27:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:27:14,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:27:14,651 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 497 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:27:14,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 893 flow [2024-06-27 21:27:14,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 890 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:27:14,664 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 602 flow [2024-06-27 21:27:14,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=602, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-27 21:27:14,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-27 21:27:14,665 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 602 flow [2024-06-27 21:27:14,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:14,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:14,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:27:14,666 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:14,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:14,667 INFO L85 PathProgramCache]: Analyzing trace with hash 735386830, now seen corresponding path program 2 times [2024-06-27 21:27:14,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:14,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778607629] [2024-06-27 21:27:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:14,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:16,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:16,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778607629] [2024-06-27 21:27:16,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778607629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:16,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:16,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:16,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903929648] [2024-06-27 21:27:16,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:16,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:16,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:16,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:16,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:17,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:17,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:17,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:17,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:17,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:18,120 INFO L124 PetriNetUnfolderBase]: 1491/2397 cut-off events. [2024-06-27 21:27:18,120 INFO L125 PetriNetUnfolderBase]: For 15709/15709 co-relation queries the response was YES. [2024-06-27 21:27:18,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10516 conditions, 2397 events. 1491/2397 cut-off events. For 15709/15709 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12471 event pairs, 534 based on Foata normal form. 4/2400 useless extension candidates. Maximal degree in co-relation 10485. Up to 2135 conditions per place. [2024-06-27 21:27:18,165 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-06-27 21:27:18,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 961 flow [2024-06-27 21:27:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:27:18,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:27:18,169 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 602 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:27:18,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 961 flow [2024-06-27 21:27:18,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 116 transitions, 901 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:18,187 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 621 flow [2024-06-27 21:27:18,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=621, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-27 21:27:18,189 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-27 21:27:18,189 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 621 flow [2024-06-27 21:27:18,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:18,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:18,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:18,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:27:18,190 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:18,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1094861274, now seen corresponding path program 3 times [2024-06-27 21:27:18,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:18,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315911652] [2024-06-27 21:27:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:18,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315911652] [2024-06-27 21:27:20,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315911652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:20,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:20,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191867905] [2024-06-27 21:27:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:20,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:20,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:20,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:20,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:20,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:20,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:20,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:20,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:20,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:21,772 INFO L124 PetriNetUnfolderBase]: 1487/2389 cut-off events. [2024-06-27 21:27:21,772 INFO L125 PetriNetUnfolderBase]: For 17724/17724 co-relation queries the response was YES. [2024-06-27 21:27:21,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10662 conditions, 2389 events. 1487/2389 cut-off events. For 17724/17724 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12406 event pairs, 666 based on Foata normal form. 4/2392 useless extension candidates. Maximal degree in co-relation 10630. Up to 2201 conditions per place. [2024-06-27 21:27:21,785 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-06-27 21:27:21,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 115 transitions, 953 flow [2024-06-27 21:27:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:27:21,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:27:21,788 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 621 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:27:21,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 115 transitions, 953 flow [2024-06-27 21:27:21,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 891 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:21,808 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 610 flow [2024-06-27 21:27:21,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=610, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2024-06-27 21:27:21,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-27 21:27:21,809 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 610 flow [2024-06-27 21:27:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:21,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:27:21,809 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:21,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -177852416, now seen corresponding path program 4 times [2024-06-27 21:27:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:21,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447151063] [2024-06-27 21:27:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:21,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:24,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447151063] [2024-06-27 21:27:24,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447151063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:24,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:24,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:24,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562069695] [2024-06-27 21:27:24,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:24,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:24,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:24,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:24,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:24,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:24,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 610 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:24,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:24,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:24,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:25,595 INFO L124 PetriNetUnfolderBase]: 1495/2409 cut-off events. [2024-06-27 21:27:25,595 INFO L125 PetriNetUnfolderBase]: For 17730/17730 co-relation queries the response was YES. [2024-06-27 21:27:25,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2409 events. 1495/2409 cut-off events. For 17730/17730 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12588 event pairs, 666 based on Foata normal form. 4/2412 useless extension candidates. Maximal degree in co-relation 10690. Up to 2255 conditions per place. [2024-06-27 21:27:25,608 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 16 changer transitions 0/114 dead transitions. [2024-06-27 21:27:25,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 114 transitions, 955 flow [2024-06-27 21:27:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:27:25,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 21:27:25,610 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 610 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:27:25,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 114 transitions, 955 flow [2024-06-27 21:27:25,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 898 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:25,630 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 622 flow [2024-06-27 21:27:25,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=622, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2024-06-27 21:27:25,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-27 21:27:25,631 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 622 flow [2024-06-27 21:27:25,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:25,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:25,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:25,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:27:25,632 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:25,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1306010627, now seen corresponding path program 1 times [2024-06-27 21:27:25,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:25,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763059831] [2024-06-27 21:27:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763059831] [2024-06-27 21:27:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763059831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:27,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:27,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578076696] [2024-06-27 21:27:27,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:27,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:27,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:27,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:27,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:27,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:27,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 622 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:27,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:27,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:27,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:28,474 INFO L124 PetriNetUnfolderBase]: 1505/2424 cut-off events. [2024-06-27 21:27:28,474 INFO L125 PetriNetUnfolderBase]: For 20035/20035 co-relation queries the response was YES. [2024-06-27 21:27:28,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11011 conditions, 2424 events. 1505/2424 cut-off events. For 20035/20035 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12713 event pairs, 652 based on Foata normal form. 2/2425 useless extension candidates. Maximal degree in co-relation 10976. Up to 2261 conditions per place. [2024-06-27 21:27:28,486 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 83 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2024-06-27 21:27:28,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 995 flow [2024-06-27 21:27:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:27:28,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 21:27:28,488 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 622 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:27:28,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 995 flow [2024-06-27 21:27:28,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 111 transitions, 951 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:28,507 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 718 flow [2024-06-27 21:27:28,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2024-06-27 21:27:28,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-27 21:27:28,508 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 718 flow [2024-06-27 21:27:28,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:28,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:28,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:28,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:27:28,509 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:28,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:28,510 INFO L85 PathProgramCache]: Analyzing trace with hash 702632732, now seen corresponding path program 5 times [2024-06-27 21:27:28,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:28,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466321450] [2024-06-27 21:27:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:28,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:30,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466321450] [2024-06-27 21:27:30,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466321450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:30,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:30,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536914155] [2024-06-27 21:27:30,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:30,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:30,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:30,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:30,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:30,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:30,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:30,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:30,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:31,866 INFO L124 PetriNetUnfolderBase]: 1501/2420 cut-off events. [2024-06-27 21:27:31,866 INFO L125 PetriNetUnfolderBase]: For 23553/23553 co-relation queries the response was YES. [2024-06-27 21:27:31,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11518 conditions, 2420 events. 1501/2420 cut-off events. For 23553/23553 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12703 event pairs, 659 based on Foata normal form. 4/2420 useless extension candidates. Maximal degree in co-relation 11481. Up to 2228 conditions per place. [2024-06-27 21:27:31,880 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 95 selfloop transitions, 20 changer transitions 0/120 dead transitions. [2024-06-27 21:27:31,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 120 transitions, 1028 flow [2024-06-27 21:27:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:27:31,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:27:31,881 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 718 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:27:31,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 120 transitions, 1028 flow [2024-06-27 21:27:31,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1010 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 21:27:31,900 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 733 flow [2024-06-27 21:27:31,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=733, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2024-06-27 21:27:31,901 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-27 21:27:31,901 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 733 flow [2024-06-27 21:27:31,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:31,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:31,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:31,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:27:31,902 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:31,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1983325907, now seen corresponding path program 2 times [2024-06-27 21:27:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523660528] [2024-06-27 21:27:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:31,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:33,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523660528] [2024-06-27 21:27:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523660528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:33,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:33,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605822933] [2024-06-27 21:27:33,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:33,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:33,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:33,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:33,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 733 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:33,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:33,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:33,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:34,942 INFO L124 PetriNetUnfolderBase]: 1495/2402 cut-off events. [2024-06-27 21:27:34,942 INFO L125 PetriNetUnfolderBase]: For 26347/26347 co-relation queries the response was YES. [2024-06-27 21:27:34,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11762 conditions, 2402 events. 1495/2402 cut-off events. For 26347/26347 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12541 event pairs, 664 based on Foata normal form. 2/2397 useless extension candidates. Maximal degree in co-relation 11721. Up to 2248 conditions per place. [2024-06-27 21:27:34,956 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 74 selfloop transitions, 23 changer transitions 0/102 dead transitions. [2024-06-27 21:27:34,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 967 flow [2024-06-27 21:27:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:27:34,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-27 21:27:34,958 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 733 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:27:34,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 967 flow [2024-06-27 21:27:34,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 102 transitions, 899 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:34,974 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 717 flow [2024-06-27 21:27:34,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=717, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2024-06-27 21:27:34,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-27 21:27:34,974 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 717 flow [2024-06-27 21:27:34,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:34,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:34,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:34,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:27:34,975 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:34,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1318190341, now seen corresponding path program 1 times [2024-06-27 21:27:34,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:34,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9366096] [2024-06-27 21:27:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:37,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:37,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9366096] [2024-06-27 21:27:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9366096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:37,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:37,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:37,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966000206] [2024-06-27 21:27:37,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:37,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:37,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:37,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:37,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:37,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 717 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:37,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:37,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:37,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:38,127 INFO L124 PetriNetUnfolderBase]: 1353/2220 cut-off events. [2024-06-27 21:27:38,127 INFO L125 PetriNetUnfolderBase]: For 26379/26379 co-relation queries the response was YES. [2024-06-27 21:27:38,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11021 conditions, 2220 events. 1353/2220 cut-off events. For 26379/26379 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11930 event pairs, 549 based on Foata normal form. 2/2198 useless extension candidates. Maximal degree in co-relation 10979. Up to 2075 conditions per place. [2024-06-27 21:27:38,139 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 91 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2024-06-27 21:27:38,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 117 transitions, 1097 flow [2024-06-27 21:27:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:27:38,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 21:27:38,141 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 717 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:27:38,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 117 transitions, 1097 flow [2024-06-27 21:27:38,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 117 transitions, 1047 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:38,160 INFO L231 Difference]: Finished difference. Result has 99 places, 99 transitions, 800 flow [2024-06-27 21:27:38,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=800, PETRI_PLACES=99, PETRI_TRANSITIONS=99} [2024-06-27 21:27:38,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-27 21:27:38,161 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 99 transitions, 800 flow [2024-06-27 21:27:38,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:38,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:38,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:27:38,162 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:38,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:38,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2005676101, now seen corresponding path program 2 times [2024-06-27 21:27:38,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:38,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602059834] [2024-06-27 21:27:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:38,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:39,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:39,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602059834] [2024-06-27 21:27:39,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602059834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:39,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:39,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:39,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491532185] [2024-06-27 21:27:39,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:39,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:39,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:39,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:39,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:39,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:39,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 800 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:39,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:39,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:39,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:40,955 INFO L124 PetriNetUnfolderBase]: 1394/2289 cut-off events. [2024-06-27 21:27:40,955 INFO L125 PetriNetUnfolderBase]: For 30293/30293 co-relation queries the response was YES. [2024-06-27 21:27:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11942 conditions, 2289 events. 1394/2289 cut-off events. For 30293/30293 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12343 event pairs, 560 based on Foata normal form. 5/2273 useless extension candidates. Maximal degree in co-relation 11898. Up to 2119 conditions per place. [2024-06-27 21:27:40,969 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-06-27 21:27:40,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 120 transitions, 1143 flow [2024-06-27 21:27:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:27:40,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-27 21:27:40,971 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 800 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:27:40,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 120 transitions, 1143 flow [2024-06-27 21:27:40,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 1113 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 21:27:40,993 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 861 flow [2024-06-27 21:27:40,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=861, PETRI_PLACES=106, PETRI_TRANSITIONS=104} [2024-06-27 21:27:40,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-27 21:27:40,994 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 861 flow [2024-06-27 21:27:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:40,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:40,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:40,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:27:40,994 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:40,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1831625723, now seen corresponding path program 1 times [2024-06-27 21:27:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:40,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243088770] [2024-06-27 21:27:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:40,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:43,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:43,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243088770] [2024-06-27 21:27:43,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243088770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:43,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106481036] [2024-06-27 21:27:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:43,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:43,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:43,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:43,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 104 transitions, 861 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:43,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:43,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:43,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:44,448 INFO L124 PetriNetUnfolderBase]: 1557/2513 cut-off events. [2024-06-27 21:27:44,448 INFO L125 PetriNetUnfolderBase]: For 37734/37734 co-relation queries the response was YES. [2024-06-27 21:27:44,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13778 conditions, 2513 events. 1557/2513 cut-off events. For 37734/37734 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13389 event pairs, 628 based on Foata normal form. 4/2516 useless extension candidates. Maximal degree in co-relation 13730. Up to 2289 conditions per place. [2024-06-27 21:27:44,464 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 98 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-27 21:27:44,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 135 transitions, 1327 flow [2024-06-27 21:27:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:27:44,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 21:27:44,466 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 861 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:27:44,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 135 transitions, 1327 flow [2024-06-27 21:27:44,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 135 transitions, 1286 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:44,493 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 970 flow [2024-06-27 21:27:44,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=970, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2024-06-27 21:27:44,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-27 21:27:44,494 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 970 flow [2024-06-27 21:27:44,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:44,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:44,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:44,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:27:44,494 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:44,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash 500330843, now seen corresponding path program 2 times [2024-06-27 21:27:44,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:44,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580858549] [2024-06-27 21:27:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:44,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:46,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:46,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580858549] [2024-06-27 21:27:46,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580858549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:46,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:46,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:46,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613726095] [2024-06-27 21:27:46,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:46,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:46,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:46,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 970 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:46,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:46,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:46,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:47,730 INFO L124 PetriNetUnfolderBase]: 1577/2541 cut-off events. [2024-06-27 21:27:47,730 INFO L125 PetriNetUnfolderBase]: For 43184/43184 co-relation queries the response was YES. [2024-06-27 21:27:47,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14540 conditions, 2541 events. 1577/2541 cut-off events. For 43184/43184 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13528 event pairs, 646 based on Foata normal form. 4/2544 useless extension candidates. Maximal degree in co-relation 14492. Up to 2423 conditions per place. [2024-06-27 21:27:47,744 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 106 selfloop transitions, 16 changer transitions 0/127 dead transitions. [2024-06-27 21:27:47,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 127 transitions, 1309 flow [2024-06-27 21:27:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:27:47,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-27 21:27:47,745 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 970 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:27:47,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 127 transitions, 1309 flow [2024-06-27 21:27:47,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 127 transitions, 1262 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:47,771 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 1011 flow [2024-06-27 21:27:47,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1011, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2024-06-27 21:27:47,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 21:27:47,772 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 1011 flow [2024-06-27 21:27:47,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:47,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:47,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:47,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:27:47,773 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:47,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:47,773 INFO L85 PathProgramCache]: Analyzing trace with hash -186960547, now seen corresponding path program 3 times [2024-06-27 21:27:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:47,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259286391] [2024-06-27 21:27:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:47,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:49,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:49,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259286391] [2024-06-27 21:27:49,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259286391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:49,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:49,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:49,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569831580] [2024-06-27 21:27:49,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:49,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:49,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:49,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:49,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:49,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 1011 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:49,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:49,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:49,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:51,148 INFO L124 PetriNetUnfolderBase]: 1565/2513 cut-off events. [2024-06-27 21:27:51,148 INFO L125 PetriNetUnfolderBase]: For 46380/46380 co-relation queries the response was YES. [2024-06-27 21:27:51,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14578 conditions, 2513 events. 1565/2513 cut-off events. For 46380/46380 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13306 event pairs, 639 based on Foata normal form. 4/2510 useless extension candidates. Maximal degree in co-relation 14528. Up to 2297 conditions per place. [2024-06-27 21:27:51,165 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 90 selfloop transitions, 35 changer transitions 0/130 dead transitions. [2024-06-27 21:27:51,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 130 transitions, 1339 flow [2024-06-27 21:27:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:27:51,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:27:51,166 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 1011 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:27:51,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 130 transitions, 1339 flow [2024-06-27 21:27:51,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 130 transitions, 1251 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:51,193 INFO L231 Difference]: Finished difference. Result has 112 places, 113 transitions, 999 flow [2024-06-27 21:27:51,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=999, PETRI_PLACES=112, PETRI_TRANSITIONS=113} [2024-06-27 21:27:51,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 21:27:51,194 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 113 transitions, 999 flow [2024-06-27 21:27:51,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:51,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:51,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:51,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:27:51,195 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:51,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1347348911, now seen corresponding path program 1 times [2024-06-27 21:27:51,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:51,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565085988] [2024-06-27 21:27:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:53,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:53,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565085988] [2024-06-27 21:27:53,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565085988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:53,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:53,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120975209] [2024-06-27 21:27:53,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:53,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:53,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:53,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 999 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:53,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:53,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:53,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:54,190 INFO L124 PetriNetUnfolderBase]: 1546/2546 cut-off events. [2024-06-27 21:27:54,190 INFO L125 PetriNetUnfolderBase]: For 48726/48727 co-relation queries the response was YES. [2024-06-27 21:27:54,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15036 conditions, 2546 events. 1546/2546 cut-off events. For 48726/48727 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14052 event pairs, 391 based on Foata normal form. 3/2520 useless extension candidates. Maximal degree in co-relation 14987. Up to 1970 conditions per place. [2024-06-27 21:27:54,207 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 93 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2024-06-27 21:27:54,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 156 transitions, 1581 flow [2024-06-27 21:27:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:27:54,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:27:54,209 INFO L175 Difference]: Start difference. First operand has 112 places, 113 transitions, 999 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:27:54,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 156 transitions, 1581 flow [2024-06-27 21:27:54,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 156 transitions, 1479 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:54,248 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 1258 flow [2024-06-27 21:27:54,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1258, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2024-06-27 21:27:54,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-27 21:27:54,249 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 1258 flow [2024-06-27 21:27:54,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:54,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:54,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:54,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:27:54,250 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:54,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2079095271, now seen corresponding path program 1 times [2024-06-27 21:27:54,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:54,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12541234] [2024-06-27 21:27:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:57,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:57,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12541234] [2024-06-27 21:27:57,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12541234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:57,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:57,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:57,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460999377] [2024-06-27 21:27:57,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:57,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:57,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:57,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:57,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:57,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 1258 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:57,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:57,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:57,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:58,463 INFO L124 PetriNetUnfolderBase]: 1720/2782 cut-off events. [2024-06-27 21:27:58,463 INFO L125 PetriNetUnfolderBase]: For 63666/63666 co-relation queries the response was YES. [2024-06-27 21:27:58,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17878 conditions, 2782 events. 1720/2782 cut-off events. For 63666/63666 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15012 event pairs, 637 based on Foata normal form. 2/2783 useless extension candidates. Maximal degree in co-relation 17827. Up to 2672 conditions per place. [2024-06-27 21:27:58,482 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 127 selfloop transitions, 15 changer transitions 0/147 dead transitions. [2024-06-27 21:27:58,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 147 transitions, 1616 flow [2024-06-27 21:27:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:27:58,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-27 21:27:58,483 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 1258 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:27:58,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 147 transitions, 1616 flow [2024-06-27 21:27:58,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 147 transitions, 1581 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:58,530 INFO L231 Difference]: Finished difference. Result has 118 places, 134 transitions, 1298 flow [2024-06-27 21:27:58,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1298, PETRI_PLACES=118, PETRI_TRANSITIONS=134} [2024-06-27 21:27:58,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-27 21:27:58,531 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 134 transitions, 1298 flow [2024-06-27 21:27:58,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:58,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:58,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:58,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:27:58,531 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:58,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 940102690, now seen corresponding path program 1 times [2024-06-27 21:27:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:58,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81238310] [2024-06-27 21:27:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:00,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:00,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81238310] [2024-06-27 21:28:00,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81238310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:00,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:00,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:00,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677452294] [2024-06-27 21:28:00,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:00,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:00,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:00,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:00,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:00,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 134 transitions, 1298 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:00,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:00,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:00,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:01,885 INFO L124 PetriNetUnfolderBase]: 1730/2799 cut-off events. [2024-06-27 21:28:01,885 INFO L125 PetriNetUnfolderBase]: For 67800/67800 co-relation queries the response was YES. [2024-06-27 21:28:01,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18224 conditions, 2799 events. 1730/2799 cut-off events. For 67800/67800 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15133 event pairs, 625 based on Foata normal form. 2/2800 useless extension candidates. Maximal degree in co-relation 18171. Up to 2641 conditions per place. [2024-06-27 21:28:01,907 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 138 selfloop transitions, 18 changer transitions 0/161 dead transitions. [2024-06-27 21:28:01,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 161 transitions, 1730 flow [2024-06-27 21:28:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:28:01,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-27 21:28:01,908 INFO L175 Difference]: Start difference. First operand has 118 places, 134 transitions, 1298 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:28:01,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 161 transitions, 1730 flow [2024-06-27 21:28:01,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 161 transitions, 1679 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:01,981 INFO L231 Difference]: Finished difference. Result has 120 places, 138 transitions, 1347 flow [2024-06-27 21:28:01,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1347, PETRI_PLACES=120, PETRI_TRANSITIONS=138} [2024-06-27 21:28:01,981 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-27 21:28:01,982 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 138 transitions, 1347 flow [2024-06-27 21:28:01,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:01,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:01,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:01,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:28:01,982 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:01,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash 945816610, now seen corresponding path program 2 times [2024-06-27 21:28:01,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:01,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665634500] [2024-06-27 21:28:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:01,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:04,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:04,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665634500] [2024-06-27 21:28:04,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665634500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:04,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:04,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:04,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100623020] [2024-06-27 21:28:04,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:04,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:04,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:04,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:04,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:04,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:04,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 138 transitions, 1347 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:04,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:04,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:04,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:05,403 INFO L124 PetriNetUnfolderBase]: 1768/2865 cut-off events. [2024-06-27 21:28:05,404 INFO L125 PetriNetUnfolderBase]: For 76073/76073 co-relation queries the response was YES. [2024-06-27 21:28:05,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19347 conditions, 2865 events. 1768/2865 cut-off events. For 76073/76073 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15608 event pairs, 612 based on Foata normal form. 3/2867 useless extension candidates. Maximal degree in co-relation 19293. Up to 2646 conditions per place. [2024-06-27 21:28:05,424 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 32 changer transitions 0/172 dead transitions. [2024-06-27 21:28:05,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 172 transitions, 1936 flow [2024-06-27 21:28:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:28:05,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-27 21:28:05,425 INFO L175 Difference]: Start difference. First operand has 120 places, 138 transitions, 1347 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:28:05,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 172 transitions, 1936 flow [2024-06-27 21:28:05,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 172 transitions, 1874 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:05,483 INFO L231 Difference]: Finished difference. Result has 124 places, 147 transitions, 1486 flow [2024-06-27 21:28:05,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1486, PETRI_PLACES=124, PETRI_TRANSITIONS=147} [2024-06-27 21:28:05,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 21:28:05,484 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 147 transitions, 1486 flow [2024-06-27 21:28:05,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:05,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:05,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:05,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:28:05,485 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:05,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:05,485 INFO L85 PathProgramCache]: Analyzing trace with hash -234802778, now seen corresponding path program 3 times [2024-06-27 21:28:05,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:05,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180025110] [2024-06-27 21:28:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:05,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180025110] [2024-06-27 21:28:07,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180025110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:07,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:07,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69838365] [2024-06-27 21:28:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:07,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:07,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:07,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 147 transitions, 1486 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:07,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:07,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:07,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:08,778 INFO L124 PetriNetUnfolderBase]: 1783/2889 cut-off events. [2024-06-27 21:28:08,778 INFO L125 PetriNetUnfolderBase]: For 83681/83681 co-relation queries the response was YES. [2024-06-27 21:28:08,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20186 conditions, 2889 events. 1783/2889 cut-off events. For 83681/83681 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15802 event pairs, 617 based on Foata normal form. 2/2884 useless extension candidates. Maximal degree in co-relation 20130. Up to 2584 conditions per place. [2024-06-27 21:28:08,799 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 134 selfloop transitions, 42 changer transitions 0/181 dead transitions. [2024-06-27 21:28:08,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 181 transitions, 2170 flow [2024-06-27 21:28:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:28:08,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-27 21:28:08,800 INFO L175 Difference]: Start difference. First operand has 124 places, 147 transitions, 1486 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:28:08,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 181 transitions, 2170 flow [2024-06-27 21:28:08,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 181 transitions, 2096 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:08,859 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 1683 flow [2024-06-27 21:28:08,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1683, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-06-27 21:28:08,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-27 21:28:08,860 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 1683 flow [2024-06-27 21:28:08,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:08,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:08,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:08,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:28:08,861 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:08,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1677767646, now seen corresponding path program 4 times [2024-06-27 21:28:08,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:08,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493272512] [2024-06-27 21:28:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:08,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:11,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:11,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493272512] [2024-06-27 21:28:11,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493272512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:11,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:11,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:11,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794375370] [2024-06-27 21:28:11,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:11,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:11,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:11,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 1683 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:11,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:11,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:11,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:12,266 INFO L124 PetriNetUnfolderBase]: 1780/2881 cut-off events. [2024-06-27 21:28:12,266 INFO L125 PetriNetUnfolderBase]: For 91289/91289 co-relation queries the response was YES. [2024-06-27 21:28:12,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20956 conditions, 2881 events. 1780/2881 cut-off events. For 91289/91289 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15728 event pairs, 605 based on Foata normal form. 1/2878 useless extension candidates. Maximal degree in co-relation 20897. Up to 2679 conditions per place. [2024-06-27 21:28:12,285 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 143 selfloop transitions, 31 changer transitions 0/179 dead transitions. [2024-06-27 21:28:12,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2159 flow [2024-06-27 21:28:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:28:12,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-27 21:28:12,286 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 1683 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:28:12,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2159 flow [2024-06-27 21:28:12,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 179 transitions, 2079 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 21:28:12,351 INFO L231 Difference]: Finished difference. Result has 134 places, 163 transitions, 1775 flow [2024-06-27 21:28:12,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1775, PETRI_PLACES=134, PETRI_TRANSITIONS=163} [2024-06-27 21:28:12,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-27 21:28:12,352 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 163 transitions, 1775 flow [2024-06-27 21:28:12,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:12,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:12,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:12,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:28:12,353 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:12,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash -539858468, now seen corresponding path program 5 times [2024-06-27 21:28:12,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:12,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732166053] [2024-06-27 21:28:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:14,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:14,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732166053] [2024-06-27 21:28:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732166053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:14,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:14,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:14,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753538484] [2024-06-27 21:28:14,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:14,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:14,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:14,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:14,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:14,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:14,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 163 transitions, 1775 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:14,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:14,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:14,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:15,286 INFO L124 PetriNetUnfolderBase]: 1776/2879 cut-off events. [2024-06-27 21:28:15,286 INFO L125 PetriNetUnfolderBase]: For 97459/97459 co-relation queries the response was YES. [2024-06-27 21:28:15,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21444 conditions, 2879 events. 1776/2879 cut-off events. For 97459/97459 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15696 event pairs, 599 based on Foata normal form. 2/2874 useless extension candidates. Maximal degree in co-relation 21382. Up to 2666 conditions per place. [2024-06-27 21:28:15,305 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 142 selfloop transitions, 31 changer transitions 0/178 dead transitions. [2024-06-27 21:28:15,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 178 transitions, 2242 flow [2024-06-27 21:28:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:28:15,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-27 21:28:15,307 INFO L175 Difference]: Start difference. First operand has 134 places, 163 transitions, 1775 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:28:15,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 178 transitions, 2242 flow [2024-06-27 21:28:15,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 178 transitions, 2175 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 21:28:15,371 INFO L231 Difference]: Finished difference. Result has 138 places, 163 transitions, 1775 flow [2024-06-27 21:28:15,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1775, PETRI_PLACES=138, PETRI_TRANSITIONS=163} [2024-06-27 21:28:15,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 21:28:15,372 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 163 transitions, 1775 flow [2024-06-27 21:28:15,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:15,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:15,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:15,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:28:15,373 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:15,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash -41751518, now seen corresponding path program 6 times [2024-06-27 21:28:15,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:15,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136433539] [2024-06-27 21:28:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:15,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:17,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:17,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136433539] [2024-06-27 21:28:17,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136433539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:17,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:17,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:17,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329851220] [2024-06-27 21:28:17,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:17,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:17,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:17,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:17,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:17,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 163 transitions, 1775 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:17,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:17,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:17,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:18,673 INFO L124 PetriNetUnfolderBase]: 1792/2909 cut-off events. [2024-06-27 21:28:18,673 INFO L125 PetriNetUnfolderBase]: For 104891/104891 co-relation queries the response was YES. [2024-06-27 21:28:18,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21982 conditions, 2909 events. 1792/2909 cut-off events. For 104891/104891 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15930 event pairs, 602 based on Foata normal form. 3/2905 useless extension candidates. Maximal degree in co-relation 21918. Up to 2674 conditions per place. [2024-06-27 21:28:18,694 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 148 selfloop transitions, 37 changer transitions 0/190 dead transitions. [2024-06-27 21:28:18,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 190 transitions, 2408 flow [2024-06-27 21:28:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:28:18,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:28:18,695 INFO L175 Difference]: Start difference. First operand has 138 places, 163 transitions, 1775 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:28:18,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 190 transitions, 2408 flow [2024-06-27 21:28:18,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 190 transitions, 2298 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:18,772 INFO L231 Difference]: Finished difference. Result has 141 places, 173 transitions, 1907 flow [2024-06-27 21:28:18,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1907, PETRI_PLACES=141, PETRI_TRANSITIONS=173} [2024-06-27 21:28:18,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-27 21:28:18,773 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 173 transitions, 1907 flow [2024-06-27 21:28:18,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:18,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:18,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:18,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:28:18,774 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:18,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1392984728, now seen corresponding path program 1 times [2024-06-27 21:28:18,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:18,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227669012] [2024-06-27 21:28:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:18,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:21,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:21,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227669012] [2024-06-27 21:28:21,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227669012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:21,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:21,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:21,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893702700] [2024-06-27 21:28:21,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:21,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:21,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:21,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:21,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:28:21,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 173 transitions, 1907 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:21,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:21,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:28:21,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:22,685 INFO L124 PetriNetUnfolderBase]: 1719/2843 cut-off events. [2024-06-27 21:28:22,686 INFO L125 PetriNetUnfolderBase]: For 113716/113719 co-relation queries the response was YES. [2024-06-27 21:28:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22029 conditions, 2843 events. 1719/2843 cut-off events. For 113716/113719 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16037 event pairs, 292 based on Foata normal form. 6/2839 useless extension candidates. Maximal degree in co-relation 21963. Up to 2136 conditions per place. [2024-06-27 21:28:22,721 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 109 selfloop transitions, 72 changer transitions 0/202 dead transitions. [2024-06-27 21:28:22,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 202 transitions, 2446 flow [2024-06-27 21:28:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:28:22,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:28:22,723 INFO L175 Difference]: Start difference. First operand has 141 places, 173 transitions, 1907 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:28:22,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 202 transitions, 2446 flow [2024-06-27 21:28:22,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 202 transitions, 2366 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:22,846 INFO L231 Difference]: Finished difference. Result has 144 places, 176 transitions, 2014 flow [2024-06-27 21:28:22,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2014, PETRI_PLACES=144, PETRI_TRANSITIONS=176} [2024-06-27 21:28:22,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-27 21:28:22,847 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 176 transitions, 2014 flow [2024-06-27 21:28:22,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:22,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:22,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:22,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:28:22,848 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:22,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash -27711308, now seen corresponding path program 1 times [2024-06-27 21:28:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:22,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202000640] [2024-06-27 21:28:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:22,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:25,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:25,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202000640] [2024-06-27 21:28:25,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202000640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:25,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:25,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560957516] [2024-06-27 21:28:25,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:25,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:25,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:25,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:25,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:25,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 176 transitions, 2014 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:25,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:25,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:25,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:26,663 INFO L124 PetriNetUnfolderBase]: 1795/2913 cut-off events. [2024-06-27 21:28:26,664 INFO L125 PetriNetUnfolderBase]: For 119928/119928 co-relation queries the response was YES. [2024-06-27 21:28:26,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23444 conditions, 2913 events. 1795/2913 cut-off events. For 119928/119928 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16014 event pairs, 619 based on Foata normal form. 1/2913 useless extension candidates. Maximal degree in co-relation 23377. Up to 2794 conditions per place. [2024-06-27 21:28:26,684 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 171 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2024-06-27 21:28:26,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 194 transitions, 2506 flow [2024-06-27 21:28:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:28:26,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-27 21:28:26,686 INFO L175 Difference]: Start difference. First operand has 144 places, 176 transitions, 2014 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:28:26,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 194 transitions, 2506 flow [2024-06-27 21:28:26,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 194 transitions, 2401 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:26,783 INFO L231 Difference]: Finished difference. Result has 146 places, 181 transitions, 2025 flow [2024-06-27 21:28:26,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2025, PETRI_PLACES=146, PETRI_TRANSITIONS=181} [2024-06-27 21:28:26,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-27 21:28:26,784 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 181 transitions, 2025 flow [2024-06-27 21:28:26,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:26,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:26,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:26,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:28:26,784 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:26,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:26,785 INFO L85 PathProgramCache]: Analyzing trace with hash 711190450, now seen corresponding path program 1 times [2024-06-27 21:28:26,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:26,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897009017] [2024-06-27 21:28:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:26,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897009017] [2024-06-27 21:28:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897009017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:29,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016181988] [2024-06-27 21:28:29,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:29,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:29,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:29,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:29,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:29,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 181 transitions, 2025 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:29,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:29,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:29,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:30,672 INFO L124 PetriNetUnfolderBase]: 1815/2944 cut-off events. [2024-06-27 21:28:30,673 INFO L125 PetriNetUnfolderBase]: For 127436/127436 co-relation queries the response was YES. [2024-06-27 21:28:30,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 2944 events. 1815/2944 cut-off events. For 127436/127436 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16151 event pairs, 601 based on Foata normal form. 4/2947 useless extension candidates. Maximal degree in co-relation 23693. Up to 2768 conditions per place. [2024-06-27 21:28:30,695 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 22 changer transitions 0/210 dead transitions. [2024-06-27 21:28:30,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 210 transitions, 2598 flow [2024-06-27 21:28:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:28:30,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-27 21:28:30,697 INFO L175 Difference]: Start difference. First operand has 146 places, 181 transitions, 2025 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:28:30,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 210 transitions, 2598 flow [2024-06-27 21:28:30,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 210 transitions, 2559 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:30,796 INFO L231 Difference]: Finished difference. Result has 149 places, 185 transitions, 2124 flow [2024-06-27 21:28:30,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2124, PETRI_PLACES=149, PETRI_TRANSITIONS=185} [2024-06-27 21:28:30,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-27 21:28:30,797 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 185 transitions, 2124 flow [2024-06-27 21:28:30,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:30,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:30,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:28:30,797 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:30,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1534506554, now seen corresponding path program 1 times [2024-06-27 21:28:30,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:30,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961701483] [2024-06-27 21:28:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:30,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:33,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961701483] [2024-06-27 21:28:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961701483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:33,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862276137] [2024-06-27 21:28:33,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:33,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:33,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:33,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:33,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:33,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 185 transitions, 2124 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:33,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:33,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:33,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:34,266 INFO L124 PetriNetUnfolderBase]: 1825/2957 cut-off events. [2024-06-27 21:28:34,266 INFO L125 PetriNetUnfolderBase]: For 134326/134326 co-relation queries the response was YES. [2024-06-27 21:28:34,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24579 conditions, 2957 events. 1825/2957 cut-off events. For 134326/134326 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16203 event pairs, 597 based on Foata normal form. 2/2957 useless extension candidates. Maximal degree in co-relation 24509. Up to 2766 conditions per place. [2024-06-27 21:28:34,288 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 25 changer transitions 0/213 dead transitions. [2024-06-27 21:28:34,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 213 transitions, 2681 flow [2024-06-27 21:28:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:28:34,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-27 21:28:34,291 INFO L175 Difference]: Start difference. First operand has 149 places, 185 transitions, 2124 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:28:34,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 213 transitions, 2681 flow [2024-06-27 21:28:34,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 213 transitions, 2586 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:34,377 INFO L231 Difference]: Finished difference. Result has 151 places, 189 transitions, 2161 flow [2024-06-27 21:28:34,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2161, PETRI_PLACES=151, PETRI_TRANSITIONS=189} [2024-06-27 21:28:34,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-27 21:28:34,378 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 189 transitions, 2161 flow [2024-06-27 21:28:34,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:34,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:34,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:34,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:28:34,378 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:34,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash 715102576, now seen corresponding path program 2 times [2024-06-27 21:28:34,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116588034] [2024-06-27 21:28:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:34,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:36,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:36,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116588034] [2024-06-27 21:28:36,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116588034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:36,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:36,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:36,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618433812] [2024-06-27 21:28:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:36,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:36,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:36,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:36,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:36,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 189 transitions, 2161 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:36,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:36,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:36,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:38,099 INFO L124 PetriNetUnfolderBase]: 1945/3143 cut-off events. [2024-06-27 21:28:38,099 INFO L125 PetriNetUnfolderBase]: For 155786/155786 co-relation queries the response was YES. [2024-06-27 21:28:38,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26930 conditions, 3143 events. 1945/3143 cut-off events. For 155786/155786 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17436 event pairs, 591 based on Foata normal form. 16/3158 useless extension candidates. Maximal degree in co-relation 26859. Up to 2741 conditions per place. [2024-06-27 21:28:38,126 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 190 selfloop transitions, 51 changer transitions 0/246 dead transitions. [2024-06-27 21:28:38,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 246 transitions, 3347 flow [2024-06-27 21:28:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:28:38,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 21:28:38,127 INFO L175 Difference]: Start difference. First operand has 151 places, 189 transitions, 2161 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:28:38,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 246 transitions, 3347 flow [2024-06-27 21:28:38,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 246 transitions, 3262 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:38,302 INFO L231 Difference]: Finished difference. Result has 158 places, 211 transitions, 2618 flow [2024-06-27 21:28:38,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2076, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2618, PETRI_PLACES=158, PETRI_TRANSITIONS=211} [2024-06-27 21:28:38,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 21:28:38,303 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 211 transitions, 2618 flow [2024-06-27 21:28:38,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:38,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:38,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:28:38,304 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:38,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash 542619196, now seen corresponding path program 3 times [2024-06-27 21:28:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:38,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936806578] [2024-06-27 21:28:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:40,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:40,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936806578] [2024-06-27 21:28:40,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936806578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:40,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:40,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:40,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145090525] [2024-06-27 21:28:40,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:40,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:40,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:40,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:40,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 211 transitions, 2618 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:40,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:40,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:40,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:42,266 INFO L124 PetriNetUnfolderBase]: 2045/3328 cut-off events. [2024-06-27 21:28:42,266 INFO L125 PetriNetUnfolderBase]: For 182154/182154 co-relation queries the response was YES. [2024-06-27 21:28:42,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29996 conditions, 3328 events. 2045/3328 cut-off events. For 182154/182154 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18938 event pairs, 383 based on Foata normal form. 8/3335 useless extension candidates. Maximal degree in co-relation 29920. Up to 2352 conditions per place. [2024-06-27 21:28:42,292 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 152 selfloop transitions, 109 changer transitions 0/266 dead transitions. [2024-06-27 21:28:42,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 266 transitions, 3779 flow [2024-06-27 21:28:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:28:42,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 21:28:42,293 INFO L175 Difference]: Start difference. First operand has 158 places, 211 transitions, 2618 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:28:42,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 266 transitions, 3779 flow [2024-06-27 21:28:42,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 266 transitions, 3635 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-27 21:28:42,436 INFO L231 Difference]: Finished difference. Result has 167 places, 229 transitions, 3238 flow [2024-06-27 21:28:42,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3238, PETRI_PLACES=167, PETRI_TRANSITIONS=229} [2024-06-27 21:28:42,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-27 21:28:42,437 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 229 transitions, 3238 flow [2024-06-27 21:28:42,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:42,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:42,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:42,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:28:42,437 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:42,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:42,438 INFO L85 PathProgramCache]: Analyzing trace with hash 715348654, now seen corresponding path program 1 times [2024-06-27 21:28:42,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:42,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275940938] [2024-06-27 21:28:42,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:42,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:45,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:45,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275940938] [2024-06-27 21:28:45,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275940938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:45,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:45,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:45,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031704535] [2024-06-27 21:28:45,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:45,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:45,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:45,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:45,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 229 transitions, 3238 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:45,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:45,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:45,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:47,401 INFO L124 PetriNetUnfolderBase]: 2089/3390 cut-off events. [2024-06-27 21:28:47,401 INFO L125 PetriNetUnfolderBase]: For 204637/204637 co-relation queries the response was YES. [2024-06-27 21:28:47,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32251 conditions, 3390 events. 2089/3390 cut-off events. For 204637/204637 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19236 event pairs, 604 based on Foata normal form. 12/3401 useless extension candidates. Maximal degree in co-relation 32171. Up to 3088 conditions per place. [2024-06-27 21:28:47,433 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 212 selfloop transitions, 42 changer transitions 0/259 dead transitions. [2024-06-27 21:28:47,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 259 transitions, 3981 flow [2024-06-27 21:28:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:28:47,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 21:28:47,434 INFO L175 Difference]: Start difference. First operand has 167 places, 229 transitions, 3238 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:28:47,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 259 transitions, 3981 flow [2024-06-27 21:28:47,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 259 transitions, 3827 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:47,613 INFO L231 Difference]: Finished difference. Result has 169 places, 230 transitions, 3209 flow [2024-06-27 21:28:47,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3209, PETRI_PLACES=169, PETRI_TRANSITIONS=230} [2024-06-27 21:28:47,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-27 21:28:47,613 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 230 transitions, 3209 flow [2024-06-27 21:28:47,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:47,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:47,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:28:47,614 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:47,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -105165654, now seen corresponding path program 2 times [2024-06-27 21:28:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74245093] [2024-06-27 21:28:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:49,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:49,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74245093] [2024-06-27 21:28:49,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74245093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:49,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:49,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:49,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434221088] [2024-06-27 21:28:49,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:49,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:49,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:49,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:49,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 230 transitions, 3209 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:49,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:49,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:49,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:51,296 INFO L124 PetriNetUnfolderBase]: 2191/3552 cut-off events. [2024-06-27 21:28:51,296 INFO L125 PetriNetUnfolderBase]: For 215217/215217 co-relation queries the response was YES. [2024-06-27 21:28:51,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33920 conditions, 3552 events. 2191/3552 cut-off events. For 215217/215217 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20365 event pairs, 422 based on Foata normal form. 3/3551 useless extension candidates. Maximal degree in co-relation 33839. Up to 2698 conditions per place. [2024-06-27 21:28:51,329 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 175 selfloop transitions, 103 changer transitions 0/283 dead transitions. [2024-06-27 21:28:51,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 283 transitions, 4367 flow [2024-06-27 21:28:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:28:51,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:28:51,331 INFO L175 Difference]: Start difference. First operand has 169 places, 230 transitions, 3209 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:28:51,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 283 transitions, 4367 flow [2024-06-27 21:28:51,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 283 transitions, 4281 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:51,512 INFO L231 Difference]: Finished difference. Result has 172 places, 252 transitions, 3854 flow [2024-06-27 21:28:51,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3854, PETRI_PLACES=172, PETRI_TRANSITIONS=252} [2024-06-27 21:28:51,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 21:28:51,513 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 252 transitions, 3854 flow [2024-06-27 21:28:51,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:51,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:51,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:51,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:28:51,514 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:51,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash -105165468, now seen corresponding path program 4 times [2024-06-27 21:28:51,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:51,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943003660] [2024-06-27 21:28:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:54,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:54,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943003660] [2024-06-27 21:28:54,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943003660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:54,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:54,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:54,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023675998] [2024-06-27 21:28:54,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:54,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:54,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:54,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 252 transitions, 3854 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:54,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:54,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:54,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:55,357 INFO L124 PetriNetUnfolderBase]: 2211/3578 cut-off events. [2024-06-27 21:28:55,357 INFO L125 PetriNetUnfolderBase]: For 236771/236771 co-relation queries the response was YES. [2024-06-27 21:28:55,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35915 conditions, 3578 events. 2211/3578 cut-off events. For 236771/236771 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20466 event pairs, 568 based on Foata normal form. 4/3578 useless extension candidates. Maximal degree in co-relation 35832. Up to 3350 conditions per place. [2024-06-27 21:28:55,395 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 247 selfloop transitions, 26 changer transitions 0/278 dead transitions. [2024-06-27 21:28:55,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 278 transitions, 4584 flow [2024-06-27 21:28:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:28:55,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-27 21:28:55,396 INFO L175 Difference]: Start difference. First operand has 172 places, 252 transitions, 3854 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:28:55,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 278 transitions, 4584 flow [2024-06-27 21:28:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 278 transitions, 4493 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:55,639 INFO L231 Difference]: Finished difference. Result has 176 places, 256 transitions, 3936 flow [2024-06-27 21:28:55,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3936, PETRI_PLACES=176, PETRI_TRANSITIONS=256} [2024-06-27 21:28:55,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-27 21:28:55,640 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 256 transitions, 3936 flow [2024-06-27 21:28:55,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:55,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:55,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:28:55,640 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:55,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 487672472, now seen corresponding path program 5 times [2024-06-27 21:28:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066040486] [2024-06-27 21:28:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:58,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066040486] [2024-06-27 21:28:58,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066040486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:58,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:58,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:58,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162041740] [2024-06-27 21:28:58,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:58,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:58,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:58,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:58,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 256 transitions, 3936 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:58,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:58,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:58,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:59,811 INFO L124 PetriNetUnfolderBase]: 2221/3594 cut-off events. [2024-06-27 21:28:59,811 INFO L125 PetriNetUnfolderBase]: For 248020/248020 co-relation queries the response was YES. [2024-06-27 21:28:59,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36633 conditions, 3594 events. 2221/3594 cut-off events. For 248020/248020 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20634 event pairs, 571 based on Foata normal form. 2/3595 useless extension candidates. Maximal degree in co-relation 36548. Up to 3441 conditions per place. [2024-06-27 21:28:59,847 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 18 changer transitions 0/277 dead transitions. [2024-06-27 21:28:59,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 277 transitions, 4626 flow [2024-06-27 21:28:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:28:59,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-27 21:28:59,849 INFO L175 Difference]: Start difference. First operand has 176 places, 256 transitions, 3936 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:28:59,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 277 transitions, 4626 flow [2024-06-27 21:29:00,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 277 transitions, 4503 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:00,091 INFO L231 Difference]: Finished difference. Result has 178 places, 259 transitions, 3944 flow [2024-06-27 21:29:00,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3944, PETRI_PLACES=178, PETRI_TRANSITIONS=259} [2024-06-27 21:29:00,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-27 21:29:00,092 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 259 transitions, 3944 flow [2024-06-27 21:29:00,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:00,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:00,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:00,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:29:00,092 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:00,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 278619306, now seen corresponding path program 3 times [2024-06-27 21:29:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:00,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882190777] [2024-06-27 21:29:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:00,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:02,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882190777] [2024-06-27 21:29:02,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882190777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:02,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:02,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:02,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072979055] [2024-06-27 21:29:02,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:02,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:02,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:02,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:02,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:02,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 259 transitions, 3944 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:02,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:02,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:02,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:03,779 INFO L124 PetriNetUnfolderBase]: 2226/3601 cut-off events. [2024-06-27 21:29:03,779 INFO L125 PetriNetUnfolderBase]: For 257507/257507 co-relation queries the response was YES. [2024-06-27 21:29:03,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37071 conditions, 3601 events. 2226/3601 cut-off events. For 257507/257507 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20619 event pairs, 568 based on Foata normal form. 1/3598 useless extension candidates. Maximal degree in co-relation 36985. Up to 3368 conditions per place. [2024-06-27 21:29:03,820 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 240 selfloop transitions, 34 changer transitions 0/279 dead transitions. [2024-06-27 21:29:03,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 279 transitions, 4608 flow [2024-06-27 21:29:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:29:03,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 21:29:03,822 INFO L175 Difference]: Start difference. First operand has 178 places, 259 transitions, 3944 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:29:03,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 279 transitions, 4608 flow [2024-06-27 21:29:04,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 279 transitions, 4485 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:29:04,093 INFO L231 Difference]: Finished difference. Result has 179 places, 262 transitions, 3965 flow [2024-06-27 21:29:04,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3965, PETRI_PLACES=179, PETRI_TRANSITIONS=262} [2024-06-27 21:29:04,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-27 21:29:04,094 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 262 transitions, 3965 flow [2024-06-27 21:29:04,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:04,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:04,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:04,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:29:04,095 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:04,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 487659452, now seen corresponding path program 6 times [2024-06-27 21:29:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:04,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52322242] [2024-06-27 21:29:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:06,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52322242] [2024-06-27 21:29:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52322242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:06,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:06,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:06,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20015356] [2024-06-27 21:29:06,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:06,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:06,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:06,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:06,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:07,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:07,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 262 transitions, 3965 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:07,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:07,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:07,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:08,128 INFO L124 PetriNetUnfolderBase]: 2228/3604 cut-off events. [2024-06-27 21:29:08,128 INFO L125 PetriNetUnfolderBase]: For 267709/267709 co-relation queries the response was YES. [2024-06-27 21:29:08,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37436 conditions, 3604 events. 2228/3604 cut-off events. For 267709/267709 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20687 event pairs, 568 based on Foata normal form. 2/3602 useless extension candidates. Maximal degree in co-relation 37350. Up to 3330 conditions per place. [2024-06-27 21:29:08,165 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 233 selfloop transitions, 47 changer transitions 0/285 dead transitions. [2024-06-27 21:29:08,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 285 transitions, 4701 flow [2024-06-27 21:29:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:29:08,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-27 21:29:08,167 INFO L175 Difference]: Start difference. First operand has 179 places, 262 transitions, 3965 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:29:08,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 285 transitions, 4701 flow [2024-06-27 21:29:08,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 285 transitions, 4611 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:08,392 INFO L231 Difference]: Finished difference. Result has 181 places, 265 transitions, 4069 flow [2024-06-27 21:29:08,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4069, PETRI_PLACES=181, PETRI_TRANSITIONS=265} [2024-06-27 21:29:08,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-27 21:29:08,393 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 265 transitions, 4069 flow [2024-06-27 21:29:08,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:08,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:08,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:29:08,393 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:08,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash 278886216, now seen corresponding path program 4 times [2024-06-27 21:29:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:08,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415340931] [2024-06-27 21:29:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:10,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:10,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415340931] [2024-06-27 21:29:10,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415340931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:10,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:10,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:10,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661991617] [2024-06-27 21:29:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:10,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:10,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:10,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:10,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 265 transitions, 4069 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:10,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:10,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:10,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:12,225 INFO L124 PetriNetUnfolderBase]: 2275/3672 cut-off events. [2024-06-27 21:29:12,225 INFO L125 PetriNetUnfolderBase]: For 285534/285534 co-relation queries the response was YES. [2024-06-27 21:29:12,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38937 conditions, 3672 events. 2275/3672 cut-off events. For 285534/285534 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21035 event pairs, 599 based on Foata normal form. 2/3670 useless extension candidates. Maximal degree in co-relation 38850. Up to 3332 conditions per place. [2024-06-27 21:29:12,262 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 236 selfloop transitions, 71 changer transitions 0/312 dead transitions. [2024-06-27 21:29:12,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 312 transitions, 5457 flow [2024-06-27 21:29:12,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:29:12,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:29:12,263 INFO L175 Difference]: Start difference. First operand has 181 places, 265 transitions, 4069 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:29:12,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 312 transitions, 5457 flow [2024-06-27 21:29:12,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 312 transitions, 5307 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:12,508 INFO L231 Difference]: Finished difference. Result has 185 places, 290 transitions, 4698 flow [2024-06-27 21:29:12,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4698, PETRI_PLACES=185, PETRI_TRANSITIONS=290} [2024-06-27 21:29:12,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-27 21:29:12,509 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 290 transitions, 4698 flow [2024-06-27 21:29:12,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:12,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:12,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:12,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:29:12,509 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:12,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1087196198, now seen corresponding path program 7 times [2024-06-27 21:29:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:12,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889593089] [2024-06-27 21:29:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:14,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:14,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889593089] [2024-06-27 21:29:14,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889593089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:14,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:14,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:14,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514981000] [2024-06-27 21:29:14,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:14,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:14,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:14,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:14,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:14,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:14,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 290 transitions, 4698 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:14,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:14,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:14,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:16,294 INFO L124 PetriNetUnfolderBase]: 2296/3711 cut-off events. [2024-06-27 21:29:16,294 INFO L125 PetriNetUnfolderBase]: For 299947/299947 co-relation queries the response was YES. [2024-06-27 21:29:16,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40300 conditions, 3711 events. 2296/3711 cut-off events. For 299947/299947 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21335 event pairs, 633 based on Foata normal form. 5/3715 useless extension candidates. Maximal degree in co-relation 40210. Up to 3530 conditions per place. [2024-06-27 21:29:16,426 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 283 selfloop transitions, 26 changer transitions 0/314 dead transitions. [2024-06-27 21:29:16,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 314 transitions, 5595 flow [2024-06-27 21:29:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:29:16,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-27 21:29:16,428 INFO L175 Difference]: Start difference. First operand has 185 places, 290 transitions, 4698 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:29:16,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 314 transitions, 5595 flow [2024-06-27 21:29:16,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 314 transitions, 5432 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-27 21:29:16,719 INFO L231 Difference]: Finished difference. Result has 190 places, 294 transitions, 4715 flow [2024-06-27 21:29:16,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4715, PETRI_PLACES=190, PETRI_TRANSITIONS=294} [2024-06-27 21:29:16,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-27 21:29:16,720 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 294 transitions, 4715 flow [2024-06-27 21:29:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:16,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:16,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:16,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:29:16,721 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:16,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1087641668, now seen corresponding path program 8 times [2024-06-27 21:29:16,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:16,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021076819] [2024-06-27 21:29:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:16,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:19,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:19,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021076819] [2024-06-27 21:29:19,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021076819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:19,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:19,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:19,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060246937] [2024-06-27 21:29:19,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:19,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:19,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:19,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:19,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 294 transitions, 4715 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:19,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:19,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:19,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:20,461 INFO L124 PetriNetUnfolderBase]: 2341/3784 cut-off events. [2024-06-27 21:29:20,462 INFO L125 PetriNetUnfolderBase]: For 318545/318545 co-relation queries the response was YES. [2024-06-27 21:29:20,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41766 conditions, 3784 events. 2341/3784 cut-off events. For 318545/318545 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21887 event pairs, 629 based on Foata normal form. 4/3781 useless extension candidates. Maximal degree in co-relation 41674. Up to 3265 conditions per place. [2024-06-27 21:29:20,503 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 245 selfloop transitions, 83 changer transitions 0/333 dead transitions. [2024-06-27 21:29:20,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 333 transitions, 6251 flow [2024-06-27 21:29:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:29:20,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 21:29:20,505 INFO L175 Difference]: Start difference. First operand has 190 places, 294 transitions, 4715 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:29:20,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 333 transitions, 6251 flow [2024-06-27 21:29:20,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 333 transitions, 6163 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:20,846 INFO L231 Difference]: Finished difference. Result has 196 places, 306 transitions, 5275 flow [2024-06-27 21:29:20,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5275, PETRI_PLACES=196, PETRI_TRANSITIONS=306} [2024-06-27 21:29:20,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-27 21:29:20,847 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 306 transitions, 5275 flow [2024-06-27 21:29:20,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:20,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:20,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:29:20,848 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:20,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 436913486, now seen corresponding path program 9 times [2024-06-27 21:29:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:20,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524204978] [2024-06-27 21:29:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:20,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:22,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524204978] [2024-06-27 21:29:22,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524204978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:22,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:22,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:22,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294719280] [2024-06-27 21:29:22,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:22,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:22,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:22,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:22,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 306 transitions, 5275 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:22,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:22,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:24,495 INFO L124 PetriNetUnfolderBase]: 2369/3824 cut-off events. [2024-06-27 21:29:24,495 INFO L125 PetriNetUnfolderBase]: For 348611/348611 co-relation queries the response was YES. [2024-06-27 21:29:24,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43356 conditions, 3824 events. 2369/3824 cut-off events. For 348611/348611 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22244 event pairs, 606 based on Foata normal form. 8/3825 useless extension candidates. Maximal degree in co-relation 43261. Up to 3522 conditions per place. [2024-06-27 21:29:24,535 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 280 selfloop transitions, 46 changer transitions 0/331 dead transitions. [2024-06-27 21:29:24,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 331 transitions, 6319 flow [2024-06-27 21:29:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:29:24,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-27 21:29:24,537 INFO L175 Difference]: Start difference. First operand has 196 places, 306 transitions, 5275 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:29:24,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 331 transitions, 6319 flow [2024-06-27 21:29:24,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 331 transitions, 6194 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 21:29:24,876 INFO L231 Difference]: Finished difference. Result has 201 places, 311 transitions, 5440 flow [2024-06-27 21:29:24,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5154, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5440, PETRI_PLACES=201, PETRI_TRANSITIONS=311} [2024-06-27 21:29:24,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-27 21:29:24,877 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 311 transitions, 5440 flow [2024-06-27 21:29:24,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:24,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:24,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:24,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:29:24,877 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:24,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:24,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1094993318, now seen corresponding path program 10 times [2024-06-27 21:29:24,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:24,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083008672] [2024-06-27 21:29:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:24,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:27,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083008672] [2024-06-27 21:29:27,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083008672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:27,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:27,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:27,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575842160] [2024-06-27 21:29:27,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:27,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:27,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:27,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:27,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 311 transitions, 5440 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:27,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:27,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:27,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:28,710 INFO L124 PetriNetUnfolderBase]: 2376/3842 cut-off events. [2024-06-27 21:29:28,710 INFO L125 PetriNetUnfolderBase]: For 355920/355920 co-relation queries the response was YES. [2024-06-27 21:29:28,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43759 conditions, 3842 events. 2376/3842 cut-off events. For 355920/355920 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22371 event pairs, 605 based on Foata normal form. 6/3841 useless extension candidates. Maximal degree in co-relation 43662. Up to 3508 conditions per place. [2024-06-27 21:29:28,750 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 48 changer transitions 0/341 dead transitions. [2024-06-27 21:29:28,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 341 transitions, 6755 flow [2024-06-27 21:29:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:29:28,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-27 21:29:28,751 INFO L175 Difference]: Start difference. First operand has 201 places, 311 transitions, 5440 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:29:28,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 341 transitions, 6755 flow [2024-06-27 21:29:29,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 341 transitions, 6567 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:29,103 INFO L231 Difference]: Finished difference. Result has 204 places, 320 transitions, 5718 flow [2024-06-27 21:29:29,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5718, PETRI_PLACES=204, PETRI_TRANSITIONS=320} [2024-06-27 21:29:29,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-27 21:29:29,104 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 320 transitions, 5718 flow [2024-06-27 21:29:29,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:29,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:29,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:29,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:29:29,105 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:29,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 437317106, now seen corresponding path program 11 times [2024-06-27 21:29:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394052431] [2024-06-27 21:29:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394052431] [2024-06-27 21:29:31,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394052431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:31,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:31,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322171787] [2024-06-27 21:29:31,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:31,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:31,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:31,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:31,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 320 transitions, 5718 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:31,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:31,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:31,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:32,727 INFO L124 PetriNetUnfolderBase]: 2385/3868 cut-off events. [2024-06-27 21:29:32,728 INFO L125 PetriNetUnfolderBase]: For 364827/364827 co-relation queries the response was YES. [2024-06-27 21:29:32,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44111 conditions, 3868 events. 2385/3868 cut-off events. For 364827/364827 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22552 event pairs, 604 based on Foata normal form. 6/3873 useless extension candidates. Maximal degree in co-relation 44012. Up to 3674 conditions per place. [2024-06-27 21:29:32,772 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 319 selfloop transitions, 24 changer transitions 0/348 dead transitions. [2024-06-27 21:29:32,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 348 transitions, 6858 flow [2024-06-27 21:29:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:29:32,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-27 21:29:32,774 INFO L175 Difference]: Start difference. First operand has 204 places, 320 transitions, 5718 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:29:32,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 348 transitions, 6858 flow [2024-06-27 21:29:33,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 348 transitions, 6706 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:33,192 INFO L231 Difference]: Finished difference. Result has 209 places, 331 transitions, 5975 flow [2024-06-27 21:29:33,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5580, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5975, PETRI_PLACES=209, PETRI_TRANSITIONS=331} [2024-06-27 21:29:33,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-27 21:29:33,192 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 331 transitions, 5975 flow [2024-06-27 21:29:33,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:33,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:33,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:33,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:29:33,193 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:33,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash -496516578, now seen corresponding path program 12 times [2024-06-27 21:29:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:33,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957918030] [2024-06-27 21:29:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:35,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:35,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957918030] [2024-06-27 21:29:35,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957918030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:35,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:35,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635033257] [2024-06-27 21:29:35,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:35,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:35,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:35,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:35,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:35,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 331 transitions, 5975 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:35,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:35,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:35,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:37,197 INFO L124 PetriNetUnfolderBase]: 2368/3846 cut-off events. [2024-06-27 21:29:37,197 INFO L125 PetriNetUnfolderBase]: For 369466/369466 co-relation queries the response was YES. [2024-06-27 21:29:37,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43892 conditions, 3846 events. 2368/3846 cut-off events. For 369466/369466 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22492 event pairs, 602 based on Foata normal form. 7/3852 useless extension candidates. Maximal degree in co-relation 43790. Up to 3616 conditions per place. [2024-06-27 21:29:37,245 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 314 selfloop transitions, 34 changer transitions 0/353 dead transitions. [2024-06-27 21:29:37,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 353 transitions, 6873 flow [2024-06-27 21:29:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 21:29:37,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35917312661498707 [2024-06-27 21:29:37,246 INFO L175 Difference]: Start difference. First operand has 209 places, 331 transitions, 5975 flow. Second operand 9 states and 139 transitions. [2024-06-27 21:29:37,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 353 transitions, 6873 flow [2024-06-27 21:29:37,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 6712 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:37,644 INFO L231 Difference]: Finished difference. Result has 213 places, 331 transitions, 5892 flow [2024-06-27 21:29:37,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5814, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5892, PETRI_PLACES=213, PETRI_TRANSITIONS=331} [2024-06-27 21:29:37,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-27 21:29:37,645 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 331 transitions, 5892 flow [2024-06-27 21:29:37,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:37,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:37,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:37,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:29:37,646 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:37,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:37,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1294049030, now seen corresponding path program 2 times [2024-06-27 21:29:37,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:37,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495318063] [2024-06-27 21:29:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:37,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:40,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495318063] [2024-06-27 21:29:40,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495318063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:40,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:40,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:40,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395006250] [2024-06-27 21:29:40,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:40,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:40,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:40,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 331 transitions, 5892 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:40,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:40,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:40,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:42,647 INFO L124 PetriNetUnfolderBase]: 2412/3902 cut-off events. [2024-06-27 21:29:42,647 INFO L125 PetriNetUnfolderBase]: For 390922/390922 co-relation queries the response was YES. [2024-06-27 21:29:42,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44653 conditions, 3902 events. 2412/3902 cut-off events. For 390922/390922 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22825 event pairs, 606 based on Foata normal form. 12/3907 useless extension candidates. Maximal degree in co-relation 44550. Up to 3563 conditions per place. [2024-06-27 21:29:42,693 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 304 selfloop transitions, 45 changer transitions 0/354 dead transitions. [2024-06-27 21:29:42,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 354 transitions, 6860 flow [2024-06-27 21:29:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:29:42,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-27 21:29:42,695 INFO L175 Difference]: Start difference. First operand has 213 places, 331 transitions, 5892 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:29:42,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 354 transitions, 6860 flow [2024-06-27 21:29:43,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 354 transitions, 6779 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:29:43,089 INFO L231 Difference]: Finished difference. Result has 214 places, 332 transitions, 5941 flow [2024-06-27 21:29:43,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5811, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5941, PETRI_PLACES=214, PETRI_TRANSITIONS=332} [2024-06-27 21:29:43,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-27 21:29:43,090 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 332 transitions, 5941 flow [2024-06-27 21:29:43,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:43,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:43,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:43,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:29:43,090 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:43,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:43,091 INFO L85 PathProgramCache]: Analyzing trace with hash -865952360, now seen corresponding path program 3 times [2024-06-27 21:29:43,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:43,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948201908] [2024-06-27 21:29:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:43,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:45,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:45,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948201908] [2024-06-27 21:29:45,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948201908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:45,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:45,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:45,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956629982] [2024-06-27 21:29:45,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:45,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:46,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:46,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 332 transitions, 5941 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:46,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:46,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:46,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:47,736 INFO L124 PetriNetUnfolderBase]: 2456/3994 cut-off events. [2024-06-27 21:29:47,736 INFO L125 PetriNetUnfolderBase]: For 408881/408881 co-relation queries the response was YES. [2024-06-27 21:29:47,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45744 conditions, 3994 events. 2456/3994 cut-off events. For 408881/408881 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23578 event pairs, 618 based on Foata normal form. 12/4005 useless extension candidates. Maximal degree in co-relation 45640. Up to 3739 conditions per place. [2024-06-27 21:29:47,786 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 327 selfloop transitions, 22 changer transitions 0/354 dead transitions. [2024-06-27 21:29:47,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 354 transitions, 6861 flow [2024-06-27 21:29:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:29:47,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-27 21:29:47,788 INFO L175 Difference]: Start difference. First operand has 214 places, 332 transitions, 5941 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:29:47,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 354 transitions, 6861 flow [2024-06-27 21:29:48,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 354 transitions, 6767 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:48,310 INFO L231 Difference]: Finished difference. Result has 216 places, 333 transitions, 5934 flow [2024-06-27 21:29:48,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5934, PETRI_PLACES=216, PETRI_TRANSITIONS=333} [2024-06-27 21:29:48,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-27 21:29:48,311 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 333 transitions, 5934 flow [2024-06-27 21:29:48,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:48,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:48,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:48,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:29:48,311 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:48,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash -850715240, now seen corresponding path program 4 times [2024-06-27 21:29:48,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:48,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635185993] [2024-06-27 21:29:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:48,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:51,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:51,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635185993] [2024-06-27 21:29:51,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635185993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:51,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:51,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:51,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039682898] [2024-06-27 21:29:51,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:51,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:51,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:51,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:51,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:51,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:51,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 333 transitions, 5934 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:51,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:51,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:51,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:53,023 INFO L124 PetriNetUnfolderBase]: 2458/3996 cut-off events. [2024-06-27 21:29:53,024 INFO L125 PetriNetUnfolderBase]: For 412502/412502 co-relation queries the response was YES. [2024-06-27 21:29:53,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45743 conditions, 3996 events. 2458/3996 cut-off events. For 412502/412502 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23478 event pairs, 602 based on Foata normal form. 8/4003 useless extension candidates. Maximal degree in co-relation 45638. Up to 3707 conditions per place. [2024-06-27 21:29:53,070 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 330 selfloop transitions, 25 changer transitions 0/360 dead transitions. [2024-06-27 21:29:53,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 360 transitions, 6940 flow [2024-06-27 21:29:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:29:53,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-27 21:29:53,071 INFO L175 Difference]: Start difference. First operand has 216 places, 333 transitions, 5934 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:29:53,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 360 transitions, 6940 flow [2024-06-27 21:29:53,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 360 transitions, 6905 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:53,538 INFO L231 Difference]: Finished difference. Result has 221 places, 334 transitions, 5991 flow [2024-06-27 21:29:53,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5991, PETRI_PLACES=221, PETRI_TRANSITIONS=334} [2024-06-27 21:29:53,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-27 21:29:53,539 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 334 transitions, 5991 flow [2024-06-27 21:29:53,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:53,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:53,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:53,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:29:53,540 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:53,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 488120794, now seen corresponding path program 1 times [2024-06-27 21:29:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:53,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176526774] [2024-06-27 21:29:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:53,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:56,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176526774] [2024-06-27 21:29:56,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176526774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:56,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:56,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911029295] [2024-06-27 21:29:56,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:56,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:56,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:56,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:56,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:56,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 334 transitions, 5991 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:56,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:56,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:56,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:58,331 INFO L124 PetriNetUnfolderBase]: 2453/3989 cut-off events. [2024-06-27 21:29:58,331 INFO L125 PetriNetUnfolderBase]: For 417169/417169 co-relation queries the response was YES. [2024-06-27 21:29:58,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45828 conditions, 3989 events. 2453/3989 cut-off events. For 417169/417169 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23482 event pairs, 615 based on Foata normal form. 2/3990 useless extension candidates. Maximal degree in co-relation 45722. Up to 3794 conditions per place. [2024-06-27 21:29:58,374 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 332 selfloop transitions, 17 changer transitions 0/354 dead transitions. [2024-06-27 21:29:58,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 354 transitions, 6809 flow [2024-06-27 21:29:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:29:58,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-27 21:29:58,376 INFO L175 Difference]: Start difference. First operand has 221 places, 334 transitions, 5991 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:29:58,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 354 transitions, 6809 flow [2024-06-27 21:29:58,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 354 transitions, 6747 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:29:58,859 INFO L231 Difference]: Finished difference. Result has 222 places, 336 transitions, 6038 flow [2024-06-27 21:29:58,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6038, PETRI_PLACES=222, PETRI_TRANSITIONS=336} [2024-06-27 21:29:58,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-27 21:29:58,860 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 336 transitions, 6038 flow [2024-06-27 21:29:58,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:58,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:58,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:58,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:29:58,860 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:58,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:58,860 INFO L85 PathProgramCache]: Analyzing trace with hash 488120546, now seen corresponding path program 1 times [2024-06-27 21:29:58,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:58,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62712109] [2024-06-27 21:29:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:58,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:01,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:01,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62712109] [2024-06-27 21:30:01,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62712109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:01,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020044418] [2024-06-27 21:30:01,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:01,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:01,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:02,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:02,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 336 transitions, 6038 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:02,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:02,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:02,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:03,352 INFO L124 PetriNetUnfolderBase]: 2455/3992 cut-off events. [2024-06-27 21:30:03,352 INFO L125 PetriNetUnfolderBase]: For 425804/425804 co-relation queries the response was YES. [2024-06-27 21:30:03,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46032 conditions, 3992 events. 2455/3992 cut-off events. For 425804/425804 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23542 event pairs, 615 based on Foata normal form. 1/3992 useless extension candidates. Maximal degree in co-relation 45925. Up to 3794 conditions per place. [2024-06-27 21:30:03,398 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 332 selfloop transitions, 22 changer transitions 0/359 dead transitions. [2024-06-27 21:30:03,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 359 transitions, 6898 flow [2024-06-27 21:30:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:30:03,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-27 21:30:03,400 INFO L175 Difference]: Start difference. First operand has 222 places, 336 transitions, 6038 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:30:03,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 359 transitions, 6898 flow [2024-06-27 21:30:03,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 359 transitions, 6827 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:03,902 INFO L231 Difference]: Finished difference. Result has 225 places, 342 transitions, 6134 flow [2024-06-27 21:30:03,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5967, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6134, PETRI_PLACES=225, PETRI_TRANSITIONS=342} [2024-06-27 21:30:03,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-27 21:30:03,902 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 342 transitions, 6134 flow [2024-06-27 21:30:03,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:03,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:03,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:03,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:30:03,903 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:03,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:03,903 INFO L85 PathProgramCache]: Analyzing trace with hash 487936096, now seen corresponding path program 1 times [2024-06-27 21:30:03,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:03,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780391449] [2024-06-27 21:30:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:03,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:06,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:06,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780391449] [2024-06-27 21:30:06,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780391449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:06,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:06,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021229839] [2024-06-27 21:30:06,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:06,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:06,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:07,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:30:07,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 342 transitions, 6134 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:07,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:07,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:30:07,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:08,823 INFO L124 PetriNetUnfolderBase]: 2402/3967 cut-off events. [2024-06-27 21:30:08,823 INFO L125 PetriNetUnfolderBase]: For 454499/454502 co-relation queries the response was YES. [2024-06-27 21:30:08,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46110 conditions, 3967 events. 2402/3967 cut-off events. For 454499/454502 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23842 event pairs, 585 based on Foata normal form. 17/3983 useless extension candidates. Maximal degree in co-relation 46002. Up to 3519 conditions per place. [2024-06-27 21:30:08,869 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 309 selfloop transitions, 40 changer transitions 0/381 dead transitions. [2024-06-27 21:30:08,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 381 transitions, 7290 flow [2024-06-27 21:30:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:30:08,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-27 21:30:08,871 INFO L175 Difference]: Start difference. First operand has 225 places, 342 transitions, 6134 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:30:08,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 381 transitions, 7290 flow [2024-06-27 21:30:09,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 381 transitions, 7225 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:09,451 INFO L231 Difference]: Finished difference. Result has 231 places, 353 transitions, 6436 flow [2024-06-27 21:30:09,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6069, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6436, PETRI_PLACES=231, PETRI_TRANSITIONS=353} [2024-06-27 21:30:09,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-27 21:30:09,451 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 353 transitions, 6436 flow [2024-06-27 21:30:09,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:09,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:09,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:09,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:30:09,452 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:09,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1087180326, now seen corresponding path program 2 times [2024-06-27 21:30:09,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:09,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067217388] [2024-06-27 21:30:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:09,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:12,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:12,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067217388] [2024-06-27 21:30:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067217388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:12,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21361362] [2024-06-27 21:30:12,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:12,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:12,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:12,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 353 transitions, 6436 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:12,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:12,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:12,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:13,981 INFO L124 PetriNetUnfolderBase]: 2505/4076 cut-off events. [2024-06-27 21:30:13,981 INFO L125 PetriNetUnfolderBase]: For 463030/463030 co-relation queries the response was YES. [2024-06-27 21:30:14,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48022 conditions, 4076 events. 2505/4076 cut-off events. For 463030/463030 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24039 event pairs, 646 based on Foata normal form. 2/4077 useless extension candidates. Maximal degree in co-relation 47911. Up to 3872 conditions per place. [2024-06-27 21:30:14,034 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 346 selfloop transitions, 20 changer transitions 0/371 dead transitions. [2024-06-27 21:30:14,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 371 transitions, 7323 flow [2024-06-27 21:30:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:30:14,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-27 21:30:14,035 INFO L175 Difference]: Start difference. First operand has 231 places, 353 transitions, 6436 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:30:14,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 371 transitions, 7323 flow [2024-06-27 21:30:14,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 371 transitions, 7212 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:14,674 INFO L231 Difference]: Finished difference. Result has 233 places, 355 transitions, 6438 flow [2024-06-27 21:30:14,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6438, PETRI_PLACES=233, PETRI_TRANSITIONS=355} [2024-06-27 21:30:14,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-27 21:30:14,675 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 355 transitions, 6438 flow [2024-06-27 21:30:14,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:14,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:14,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:14,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:30:14,675 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:14,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 450976078, now seen corresponding path program 3 times [2024-06-27 21:30:14,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:14,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977168553] [2024-06-27 21:30:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:14,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:17,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977168553] [2024-06-27 21:30:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977168553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737945404] [2024-06-27 21:30:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:17,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:17,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:17,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:17,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:17,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 355 transitions, 6438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:17,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:17,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:17,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:19,398 INFO L124 PetriNetUnfolderBase]: 2497/4064 cut-off events. [2024-06-27 21:30:19,398 INFO L125 PetriNetUnfolderBase]: For 479165/479165 co-relation queries the response was YES. [2024-06-27 21:30:19,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47809 conditions, 4064 events. 2497/4064 cut-off events. For 479165/479165 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24079 event pairs, 619 based on Foata normal form. 4/4067 useless extension candidates. Maximal degree in co-relation 47697. Up to 3857 conditions per place. [2024-06-27 21:30:19,448 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 346 selfloop transitions, 21 changer transitions 0/372 dead transitions. [2024-06-27 21:30:19,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 372 transitions, 7312 flow [2024-06-27 21:30:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:30:19,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-27 21:30:19,450 INFO L175 Difference]: Start difference. First operand has 233 places, 355 transitions, 6438 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:30:19,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 372 transitions, 7312 flow [2024-06-27 21:30:20,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 372 transitions, 7227 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:20,131 INFO L231 Difference]: Finished difference. Result has 235 places, 357 transitions, 6480 flow [2024-06-27 21:30:20,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6480, PETRI_PLACES=235, PETRI_TRANSITIONS=357} [2024-06-27 21:30:20,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-27 21:30:20,132 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 357 transitions, 6480 flow [2024-06-27 21:30:20,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:20,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:20,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:30:20,133 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:20,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash -850708296, now seen corresponding path program 4 times [2024-06-27 21:30:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:20,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512408202] [2024-06-27 21:30:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512408202] [2024-06-27 21:30:23,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512408202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:23,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:23,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207243084] [2024-06-27 21:30:23,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:23,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:23,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:23,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:23,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:23,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 357 transitions, 6480 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:23,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:23,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:23,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:24,808 INFO L124 PetriNetUnfolderBase]: 2494/4059 cut-off events. [2024-06-27 21:30:24,808 INFO L125 PetriNetUnfolderBase]: For 491742/491742 co-relation queries the response was YES. [2024-06-27 21:30:24,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47979 conditions, 4059 events. 2494/4059 cut-off events. For 491742/491742 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23978 event pairs, 595 based on Foata normal form. 2/4060 useless extension candidates. Maximal degree in co-relation 47866. Up to 3859 conditions per place. [2024-06-27 21:30:24,853 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 352 selfloop transitions, 16 changer transitions 0/373 dead transitions. [2024-06-27 21:30:24,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 373 transitions, 7280 flow [2024-06-27 21:30:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 21:30:24,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-27 21:30:24,854 INFO L175 Difference]: Start difference. First operand has 235 places, 357 transitions, 6480 flow. Second operand 8 states and 120 transitions. [2024-06-27 21:30:24,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 373 transitions, 7280 flow [2024-06-27 21:30:25,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 373 transitions, 7179 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:25,391 INFO L231 Difference]: Finished difference. Result has 237 places, 358 transitions, 6439 flow [2024-06-27 21:30:25,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6439, PETRI_PLACES=237, PETRI_TRANSITIONS=358} [2024-06-27 21:30:25,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-27 21:30:25,392 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 358 transitions, 6439 flow [2024-06-27 21:30:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:25,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:25,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:30:25,392 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:25,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -619333827, now seen corresponding path program 1 times [2024-06-27 21:30:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:25,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205960742] [2024-06-27 21:30:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:27,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205960742] [2024-06-27 21:30:27,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205960742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:27,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:27,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:27,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668191995] [2024-06-27 21:30:27,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:27,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:27,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:27,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:27,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:27,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 358 transitions, 6439 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:27,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:27,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:27,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:29,840 INFO L124 PetriNetUnfolderBase]: 2502/4078 cut-off events. [2024-06-27 21:30:29,840 INFO L125 PetriNetUnfolderBase]: For 507348/507348 co-relation queries the response was YES. [2024-06-27 21:30:29,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48260 conditions, 4078 events. 2502/4078 cut-off events. For 507348/507348 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24048 event pairs, 430 based on Foata normal form. 2/4079 useless extension candidates. Maximal degree in co-relation 48146. Up to 3722 conditions per place. [2024-06-27 21:30:29,888 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 362 selfloop transitions, 34 changer transitions 0/401 dead transitions. [2024-06-27 21:30:29,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 401 transitions, 7668 flow [2024-06-27 21:30:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:30:29,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:30:29,889 INFO L175 Difference]: Start difference. First operand has 237 places, 358 transitions, 6439 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:30:29,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 401 transitions, 7668 flow [2024-06-27 21:30:30,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 401 transitions, 7618 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:30,547 INFO L231 Difference]: Finished difference. Result has 240 places, 367 transitions, 6703 flow [2024-06-27 21:30:30,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6389, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6703, PETRI_PLACES=240, PETRI_TRANSITIONS=367} [2024-06-27 21:30:30,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-27 21:30:30,547 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 367 transitions, 6703 flow [2024-06-27 21:30:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:30,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:30,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:30:30,548 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:30,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash -610762947, now seen corresponding path program 2 times [2024-06-27 21:30:30,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:30,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568419156] [2024-06-27 21:30:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:30,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:33,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:33,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568419156] [2024-06-27 21:30:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568419156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:33,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:33,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:33,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247955448] [2024-06-27 21:30:33,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:33,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:33,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:33,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:33,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 367 transitions, 6703 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:33,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:33,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:33,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:35,161 INFO L124 PetriNetUnfolderBase]: 2515/4095 cut-off events. [2024-06-27 21:30:35,161 INFO L125 PetriNetUnfolderBase]: For 525897/525897 co-relation queries the response was YES. [2024-06-27 21:30:35,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49055 conditions, 4095 events. 2515/4095 cut-off events. For 525897/525897 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24199 event pairs, 588 based on Foata normal form. 2/4096 useless extension candidates. Maximal degree in co-relation 48939. Up to 3825 conditions per place. [2024-06-27 21:30:35,210 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 362 selfloop transitions, 33 changer transitions 0/400 dead transitions. [2024-06-27 21:30:35,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 400 transitions, 7698 flow [2024-06-27 21:30:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:30:35,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 21:30:35,212 INFO L175 Difference]: Start difference. First operand has 240 places, 367 transitions, 6703 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:30:35,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 400 transitions, 7698 flow [2024-06-27 21:30:35,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 400 transitions, 7598 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-27 21:30:35,834 INFO L231 Difference]: Finished difference. Result has 246 places, 372 transitions, 6799 flow [2024-06-27 21:30:35,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6617, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6799, PETRI_PLACES=246, PETRI_TRANSITIONS=372} [2024-06-27 21:30:35,835 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-27 21:30:35,835 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 372 transitions, 6799 flow [2024-06-27 21:30:35,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:35,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:35,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:35,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:30:35,835 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:35,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:35,836 INFO L85 PathProgramCache]: Analyzing trace with hash -616473891, now seen corresponding path program 1 times [2024-06-27 21:30:35,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:35,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557021610] [2024-06-27 21:30:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:35,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:38,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:38,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557021610] [2024-06-27 21:30:38,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557021610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:38,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:38,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381996029] [2024-06-27 21:30:38,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:38,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:38,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 372 transitions, 6799 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:38,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:38,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:38,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:40,340 INFO L124 PetriNetUnfolderBase]: 2520/4104 cut-off events. [2024-06-27 21:30:40,340 INFO L125 PetriNetUnfolderBase]: For 539122/539122 co-relation queries the response was YES. [2024-06-27 21:30:40,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49300 conditions, 4104 events. 2520/4104 cut-off events. For 539122/539122 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24200 event pairs, 579 based on Foata normal form. 1/4104 useless extension candidates. Maximal degree in co-relation 49182. Up to 3833 conditions per place. [2024-06-27 21:30:40,394 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 377 selfloop transitions, 24 changer transitions 0/406 dead transitions. [2024-06-27 21:30:40,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 406 transitions, 7809 flow [2024-06-27 21:30:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:30:40,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 21:30:40,395 INFO L175 Difference]: Start difference. First operand has 246 places, 372 transitions, 6799 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:30:40,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 406 transitions, 7809 flow [2024-06-27 21:30:41,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 406 transitions, 7728 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:41,142 INFO L231 Difference]: Finished difference. Result has 249 places, 375 transitions, 6891 flow [2024-06-27 21:30:41,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6718, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6891, PETRI_PLACES=249, PETRI_TRANSITIONS=375} [2024-06-27 21:30:41,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 21:30:41,143 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 375 transitions, 6891 flow [2024-06-27 21:30:41,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:41,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:41,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:41,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:30:41,144 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:41,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:41,144 INFO L85 PathProgramCache]: Analyzing trace with hash 866277181, now seen corresponding path program 3 times [2024-06-27 21:30:41,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:41,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068834357] [2024-06-27 21:30:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:43,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:43,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068834357] [2024-06-27 21:30:43,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068834357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:43,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:43,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:43,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985526575] [2024-06-27 21:30:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:43,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:43,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:43,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:43,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 375 transitions, 6891 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:43,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:43,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:43,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:45,811 INFO L124 PetriNetUnfolderBase]: 2528/4117 cut-off events. [2024-06-27 21:30:45,811 INFO L125 PetriNetUnfolderBase]: For 559680/559680 co-relation queries the response was YES. [2024-06-27 21:30:45,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49886 conditions, 4117 events. 2528/4117 cut-off events. For 559680/559680 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24352 event pairs, 594 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 49767. Up to 3844 conditions per place. [2024-06-27 21:30:45,861 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 361 selfloop transitions, 33 changer transitions 0/399 dead transitions. [2024-06-27 21:30:45,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 399 transitions, 7798 flow [2024-06-27 21:30:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:30:45,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 21:30:45,862 INFO L175 Difference]: Start difference. First operand has 249 places, 375 transitions, 6891 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:30:45,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 399 transitions, 7798 flow [2024-06-27 21:30:46,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 399 transitions, 7673 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:46,402 INFO L231 Difference]: Finished difference. Result has 253 places, 378 transitions, 6910 flow [2024-06-27 21:30:46,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6910, PETRI_PLACES=253, PETRI_TRANSITIONS=378} [2024-06-27 21:30:46,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-27 21:30:46,403 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 378 transitions, 6910 flow [2024-06-27 21:30:46,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:46,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:46,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:46,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:30:46,404 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:46,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1495602465, now seen corresponding path program 2 times [2024-06-27 21:30:46,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:46,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150505112] [2024-06-27 21:30:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:46,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:49,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:49,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150505112] [2024-06-27 21:30:49,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150505112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:49,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:49,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:49,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525317301] [2024-06-27 21:30:49,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:49,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:49,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:49,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:49,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 378 transitions, 6910 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:49,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:49,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:49,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:51,510 INFO L124 PetriNetUnfolderBase]: 2533/4129 cut-off events. [2024-06-27 21:30:51,510 INFO L125 PetriNetUnfolderBase]: For 576044/576044 co-relation queries the response was YES. [2024-06-27 21:30:51,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50258 conditions, 4129 events. 2533/4129 cut-off events. For 576044/576044 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24413 event pairs, 582 based on Foata normal form. 1/4129 useless extension candidates. Maximal degree in co-relation 50137. Up to 3876 conditions per place. [2024-06-27 21:30:51,558 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 379 selfloop transitions, 21 changer transitions 0/405 dead transitions. [2024-06-27 21:30:51,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 405 transitions, 7902 flow [2024-06-27 21:30:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:30:51,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-27 21:30:51,560 INFO L175 Difference]: Start difference. First operand has 253 places, 378 transitions, 6910 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:30:51,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 405 transitions, 7902 flow [2024-06-27 21:30:52,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 405 transitions, 7813 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:52,074 INFO L231 Difference]: Finished difference. Result has 256 places, 381 transitions, 6993 flow [2024-06-27 21:30:52,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6821, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6993, PETRI_PLACES=256, PETRI_TRANSITIONS=381} [2024-06-27 21:30:52,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-27 21:30:52,075 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 381 transitions, 6993 flow [2024-06-27 21:30:52,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:52,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:52,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:52,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:30:52,076 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:52,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -325055388, now seen corresponding path program 1 times [2024-06-27 21:30:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:52,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075036549] [2024-06-27 21:30:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:54,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075036549] [2024-06-27 21:30:54,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075036549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:54,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:54,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:54,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777503048] [2024-06-27 21:30:54,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:54,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:54,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:54,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:54,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 381 transitions, 6993 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:54,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:54,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:54,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:56,547 INFO L124 PetriNetUnfolderBase]: 2553/4162 cut-off events. [2024-06-27 21:30:56,548 INFO L125 PetriNetUnfolderBase]: For 597266/597266 co-relation queries the response was YES. [2024-06-27 21:30:56,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51098 conditions, 4162 events. 2553/4162 cut-off events. For 597266/597266 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24607 event pairs, 577 based on Foata normal form. 4/4164 useless extension candidates. Maximal degree in co-relation 50976. Up to 3867 conditions per place. [2024-06-27 21:30:56,597 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 381 selfloop transitions, 32 changer transitions 0/418 dead transitions. [2024-06-27 21:30:56,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 418 transitions, 8173 flow [2024-06-27 21:30:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:30:56,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-27 21:30:56,599 INFO L175 Difference]: Start difference. First operand has 256 places, 381 transitions, 6993 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:30:56,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 418 transitions, 8173 flow [2024-06-27 21:30:57,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 418 transitions, 8039 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:57,189 INFO L231 Difference]: Finished difference. Result has 260 places, 392 transitions, 7212 flow [2024-06-27 21:30:57,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6859, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7212, PETRI_PLACES=260, PETRI_TRANSITIONS=392} [2024-06-27 21:30:57,189 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-27 21:30:57,189 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 392 transitions, 7212 flow [2024-06-27 21:30:57,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:57,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:57,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:57,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:30:57,190 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:57,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:57,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1495609409, now seen corresponding path program 1 times [2024-06-27 21:30:57,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:57,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073036941] [2024-06-27 21:30:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:57,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:59,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:59,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073036941] [2024-06-27 21:30:59,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073036941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:59,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:59,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:59,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036515424] [2024-06-27 21:30:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:59,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:59,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:59,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:59,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 392 transitions, 7212 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:59,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:59,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:59,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:02,057 INFO L124 PetriNetUnfolderBase]: 2579/4195 cut-off events. [2024-06-27 21:31:02,058 INFO L125 PetriNetUnfolderBase]: For 618075/618075 co-relation queries the response was YES. [2024-06-27 21:31:02,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52424 conditions, 4195 events. 2579/4195 cut-off events. For 618075/618075 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24938 event pairs, 347 based on Foata normal form. 2/4196 useless extension candidates. Maximal degree in co-relation 52300. Up to 3222 conditions per place. [2024-06-27 21:31:02,111 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 282 selfloop transitions, 160 changer transitions 0/447 dead transitions. [2024-06-27 21:31:02,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 447 transitions, 8620 flow [2024-06-27 21:31:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:31:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:31:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 21:31:02,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-27 21:31:02,117 INFO L175 Difference]: Start difference. First operand has 260 places, 392 transitions, 7212 flow. Second operand 11 states and 189 transitions. [2024-06-27 21:31:02,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 447 transitions, 8620 flow [2024-06-27 21:31:02,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 447 transitions, 8447 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:02,667 INFO L231 Difference]: Finished difference. Result has 266 places, 404 transitions, 7789 flow [2024-06-27 21:31:02,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7789, PETRI_PLACES=266, PETRI_TRANSITIONS=404} [2024-06-27 21:31:02,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 21:31:02,668 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 404 transitions, 7789 flow [2024-06-27 21:31:02,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:02,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:02,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:02,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:31:02,668 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:02,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1495609564, now seen corresponding path program 2 times [2024-06-27 21:31:02,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:02,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878442043] [2024-06-27 21:31:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:02,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:05,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878442043] [2024-06-27 21:31:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878442043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:05,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:05,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:05,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038350817] [2024-06-27 21:31:05,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:05,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:05,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:05,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:05,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 404 transitions, 7789 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:05,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:05,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:05,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:07,494 INFO L124 PetriNetUnfolderBase]: 2691/4361 cut-off events. [2024-06-27 21:31:07,494 INFO L125 PetriNetUnfolderBase]: For 679477/679477 co-relation queries the response was YES. [2024-06-27 21:31:07,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56433 conditions, 4361 events. 2691/4361 cut-off events. For 679477/679477 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25875 event pairs, 432 based on Foata normal form. 6/4366 useless extension candidates. Maximal degree in co-relation 56307. Up to 3165 conditions per place. [2024-06-27 21:31:07,550 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 279 selfloop transitions, 190 changer transitions 0/474 dead transitions. [2024-06-27 21:31:07,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 474 transitions, 9692 flow [2024-06-27 21:31:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:31:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:31:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 21:31:07,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080338266384778 [2024-06-27 21:31:07,552 INFO L175 Difference]: Start difference. First operand has 266 places, 404 transitions, 7789 flow. Second operand 11 states and 193 transitions. [2024-06-27 21:31:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 474 transitions, 9692 flow [2024-06-27 21:31:08,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 474 transitions, 9548 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-27 21:31:08,510 INFO L231 Difference]: Finished difference. Result has 269 places, 424 transitions, 8682 flow [2024-06-27 21:31:08,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8682, PETRI_PLACES=269, PETRI_TRANSITIONS=424} [2024-06-27 21:31:08,511 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-27 21:31:08,511 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 424 transitions, 8682 flow [2024-06-27 21:31:08,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:08,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:08,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:08,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:31:08,511 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:08,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1473218175, now seen corresponding path program 4 times [2024-06-27 21:31:08,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:08,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619713436] [2024-06-27 21:31:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:11,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:11,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619713436] [2024-06-27 21:31:11,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619713436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:11,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:11,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:11,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501665072] [2024-06-27 21:31:11,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:11,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:11,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:11,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:11,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 424 transitions, 8682 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:11,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:11,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:11,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:13,576 INFO L124 PetriNetUnfolderBase]: 2686/4339 cut-off events. [2024-06-27 21:31:13,577 INFO L125 PetriNetUnfolderBase]: For 706822/706822 co-relation queries the response was YES. [2024-06-27 21:31:13,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58502 conditions, 4339 events. 2686/4339 cut-off events. For 706822/706822 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25630 event pairs, 608 based on Foata normal form. 2/4334 useless extension candidates. Maximal degree in co-relation 58375. Up to 4070 conditions per place. [2024-06-27 21:31:13,637 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 399 selfloop transitions, 33 changer transitions 0/437 dead transitions. [2024-06-27 21:31:13,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 437 transitions, 9580 flow [2024-06-27 21:31:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:31:13,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-27 21:31:13,638 INFO L175 Difference]: Start difference. First operand has 269 places, 424 transitions, 8682 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:31:13,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 437 transitions, 9580 flow [2024-06-27 21:31:14,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 437 transitions, 9448 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:14,585 INFO L231 Difference]: Finished difference. Result has 271 places, 424 transitions, 8621 flow [2024-06-27 21:31:14,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8550, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8621, PETRI_PLACES=271, PETRI_TRANSITIONS=424} [2024-06-27 21:31:14,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-27 21:31:14,586 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 424 transitions, 8621 flow [2024-06-27 21:31:14,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:14,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:14,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:14,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:31:14,587 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:14,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:14,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1074868959, now seen corresponding path program 3 times [2024-06-27 21:31:14,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:14,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449561458] [2024-06-27 21:31:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:14,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:17,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449561458] [2024-06-27 21:31:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449561458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:17,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:17,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:17,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463243304] [2024-06-27 21:31:17,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:17,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:17,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:17,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:17,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:17,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 424 transitions, 8621 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:17,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:17,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:17,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:19,494 INFO L124 PetriNetUnfolderBase]: 2691/4358 cut-off events. [2024-06-27 21:31:19,495 INFO L125 PetriNetUnfolderBase]: For 722602/722602 co-relation queries the response was YES. [2024-06-27 21:31:19,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58790 conditions, 4358 events. 2691/4358 cut-off events. For 722602/722602 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25811 event pairs, 588 based on Foata normal form. 1/4355 useless extension candidates. Maximal degree in co-relation 58661. Up to 4069 conditions per place. [2024-06-27 21:31:19,558 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 418 selfloop transitions, 25 changer transitions 0/448 dead transitions. [2024-06-27 21:31:19,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 448 transitions, 9711 flow [2024-06-27 21:31:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:31:19,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-27 21:31:19,560 INFO L175 Difference]: Start difference. First operand has 271 places, 424 transitions, 8621 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:31:19,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 448 transitions, 9711 flow [2024-06-27 21:31:20,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 448 transitions, 9588 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 21:31:20,434 INFO L231 Difference]: Finished difference. Result has 270 places, 427 transitions, 8698 flow [2024-06-27 21:31:20,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8498, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8698, PETRI_PLACES=270, PETRI_TRANSITIONS=427} [2024-06-27 21:31:20,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 21:31:20,435 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 427 transitions, 8698 flow [2024-06-27 21:31:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:20,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:20,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:20,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:31:20,436 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:20,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2062437087, now seen corresponding path program 4 times [2024-06-27 21:31:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891277616] [2024-06-27 21:31:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:23,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891277616] [2024-06-27 21:31:23,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891277616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:23,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:23,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:23,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061131373] [2024-06-27 21:31:23,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:23,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:23,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:23,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 427 transitions, 8698 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:23,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:25,425 INFO L124 PetriNetUnfolderBase]: 2688/4354 cut-off events. [2024-06-27 21:31:25,425 INFO L125 PetriNetUnfolderBase]: For 737639/737639 co-relation queries the response was YES. [2024-06-27 21:31:25,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59067 conditions, 4354 events. 2688/4354 cut-off events. For 737639/737639 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25790 event pairs, 593 based on Foata normal form. 1/4351 useless extension candidates. Maximal degree in co-relation 58939. Up to 4047 conditions per place. [2024-06-27 21:31:25,485 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 404 selfloop transitions, 38 changer transitions 0/447 dead transitions. [2024-06-27 21:31:25,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 447 transitions, 9778 flow [2024-06-27 21:31:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:31:25,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 21:31:25,486 INFO L175 Difference]: Start difference. First operand has 270 places, 427 transitions, 8698 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:31:25,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 447 transitions, 9778 flow [2024-06-27 21:31:26,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 447 transitions, 9622 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:26,399 INFO L231 Difference]: Finished difference. Result has 272 places, 430 transitions, 8774 flow [2024-06-27 21:31:26,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8542, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8774, PETRI_PLACES=272, PETRI_TRANSITIONS=430} [2024-06-27 21:31:26,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-27 21:31:26,400 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 430 transitions, 8774 flow [2024-06-27 21:31:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:26,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:26,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:26,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:31:26,400 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:26,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1034833817, now seen corresponding path program 2 times [2024-06-27 21:31:26,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:26,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449726913] [2024-06-27 21:31:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:26,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:28,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:28,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449726913] [2024-06-27 21:31:28,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449726913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:28,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:28,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:28,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670346761] [2024-06-27 21:31:28,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:28,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:28,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:28,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:28,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 430 transitions, 8774 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:28,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:28,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:28,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:30,756 INFO L124 PetriNetUnfolderBase]: 2698/4368 cut-off events. [2024-06-27 21:31:30,756 INFO L125 PetriNetUnfolderBase]: For 759885/759885 co-relation queries the response was YES. [2024-06-27 21:31:30,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59694 conditions, 4368 events. 2698/4368 cut-off events. For 759885/759885 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25891 event pairs, 593 based on Foata normal form. 2/4366 useless extension candidates. Maximal degree in co-relation 59565. Up to 4070 conditions per place. [2024-06-27 21:31:30,814 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 421 selfloop transitions, 30 changer transitions 0/456 dead transitions. [2024-06-27 21:31:30,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 456 transitions, 9868 flow [2024-06-27 21:31:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:31:30,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-27 21:31:30,815 INFO L175 Difference]: Start difference. First operand has 272 places, 430 transitions, 8774 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:31:30,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 456 transitions, 9868 flow [2024-06-27 21:31:31,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 456 transitions, 9680 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:31,844 INFO L231 Difference]: Finished difference. Result has 275 places, 434 transitions, 8785 flow [2024-06-27 21:31:31,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8785, PETRI_PLACES=275, PETRI_TRANSITIONS=434} [2024-06-27 21:31:31,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-27 21:31:31,845 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 434 transitions, 8785 flow [2024-06-27 21:31:31,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:31,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:31,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:31,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:31:31,845 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:31,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1034833972, now seen corresponding path program 3 times [2024-06-27 21:31:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966172189] [2024-06-27 21:31:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:34,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966172189] [2024-06-27 21:31:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966172189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:34,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782892888] [2024-06-27 21:31:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:34,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:34,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:34,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 434 transitions, 8785 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:34,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:34,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:34,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:36,535 INFO L124 PetriNetUnfolderBase]: 2809/4531 cut-off events. [2024-06-27 21:31:36,536 INFO L125 PetriNetUnfolderBase]: For 819913/819913 co-relation queries the response was YES. [2024-06-27 21:31:36,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62896 conditions, 4531 events. 2809/4531 cut-off events. For 819913/819913 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 26889 event pairs, 601 based on Foata normal form. 6/4533 useless extension candidates. Maximal degree in co-relation 62766. Up to 4081 conditions per place. [2024-06-27 21:31:36,595 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 429 selfloop transitions, 55 changer transitions 0/489 dead transitions. [2024-06-27 21:31:36,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 489 transitions, 10868 flow [2024-06-27 21:31:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:31:36,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-27 21:31:36,596 INFO L175 Difference]: Start difference. First operand has 275 places, 434 transitions, 8785 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:31:36,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 489 transitions, 10868 flow [2024-06-27 21:31:37,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 489 transitions, 10676 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:37,473 INFO L231 Difference]: Finished difference. Result has 280 places, 457 transitions, 9369 flow [2024-06-27 21:31:37,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8593, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9369, PETRI_PLACES=280, PETRI_TRANSITIONS=457} [2024-06-27 21:31:37,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-27 21:31:37,474 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 457 transitions, 9369 flow [2024-06-27 21:31:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:37,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:37,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:37,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:31:37,474 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:37,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1034839552, now seen corresponding path program 4 times [2024-06-27 21:31:37,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:37,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442727322] [2024-06-27 21:31:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:37,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:39,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:39,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442727322] [2024-06-27 21:31:39,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442727322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:39,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:39,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496097353] [2024-06-27 21:31:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:39,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:39,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 457 transitions, 9369 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:39,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:39,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:39,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:41,989 INFO L124 PetriNetUnfolderBase]: 2859/4606 cut-off events. [2024-06-27 21:31:41,989 INFO L125 PetriNetUnfolderBase]: For 857690/857690 co-relation queries the response was YES. [2024-06-27 21:31:42,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64982 conditions, 4606 events. 2859/4606 cut-off events. For 857690/857690 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27372 event pairs, 603 based on Foata normal form. 5/4607 useless extension candidates. Maximal degree in co-relation 64849. Up to 4212 conditions per place. [2024-06-27 21:31:42,055 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 446 selfloop transitions, 48 changer transitions 0/499 dead transitions. [2024-06-27 21:31:42,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 499 transitions, 10945 flow [2024-06-27 21:31:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:31:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:31:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:31:42,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:31:42,056 INFO L175 Difference]: Start difference. First operand has 280 places, 457 transitions, 9369 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:31:42,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 499 transitions, 10945 flow [2024-06-27 21:31:43,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 499 transitions, 10610 flow, removed 156 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:43,279 INFO L231 Difference]: Finished difference. Result has 287 places, 465 transitions, 9403 flow [2024-06-27 21:31:43,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9112, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9403, PETRI_PLACES=287, PETRI_TRANSITIONS=465} [2024-06-27 21:31:43,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-27 21:31:43,279 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 465 transitions, 9403 flow [2024-06-27 21:31:43,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:43,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:43,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:43,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:31:43,280 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:43,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2062020788, now seen corresponding path program 5 times [2024-06-27 21:31:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238970188] [2024-06-27 21:31:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:45,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:45,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238970188] [2024-06-27 21:31:45,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238970188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:45,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:45,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:45,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047747511] [2024-06-27 21:31:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:45,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:45,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:45,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:45,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 465 transitions, 9403 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:45,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:45,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:45,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:47,752 INFO L124 PetriNetUnfolderBase]: 2869/4622 cut-off events. [2024-06-27 21:31:47,752 INFO L125 PetriNetUnfolderBase]: For 868823/868823 co-relation queries the response was YES. [2024-06-27 21:31:47,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65054 conditions, 4622 events. 2869/4622 cut-off events. For 868823/868823 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27449 event pairs, 604 based on Foata normal form. 2/4623 useless extension candidates. Maximal degree in co-relation 64918. Up to 4397 conditions per place. [2024-06-27 21:31:47,816 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 466 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2024-06-27 21:31:47,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 492 transitions, 10682 flow [2024-06-27 21:31:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 21:31:47,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35142118863049093 [2024-06-27 21:31:47,817 INFO L175 Difference]: Start difference. First operand has 287 places, 465 transitions, 9403 flow. Second operand 9 states and 136 transitions. [2024-06-27 21:31:47,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 492 transitions, 10682 flow [2024-06-27 21:31:48,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 492 transitions, 10565 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:48,978 INFO L231 Difference]: Finished difference. Result has 290 places, 473 transitions, 9575 flow [2024-06-27 21:31:48,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9286, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9575, PETRI_PLACES=290, PETRI_TRANSITIONS=473} [2024-06-27 21:31:48,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-27 21:31:48,979 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 473 transitions, 9575 flow [2024-06-27 21:31:48,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:48,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:48,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:31:48,980 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:48,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash 61347904, now seen corresponding path program 6 times [2024-06-27 21:31:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:48,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124535292] [2024-06-27 21:31:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:51,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:51,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124535292] [2024-06-27 21:31:51,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124535292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:51,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:51,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965630763] [2024-06-27 21:31:51,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:51,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:51,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:51,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:51,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 473 transitions, 9575 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:51,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:51,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:51,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:54,183 INFO L124 PetriNetUnfolderBase]: 2983/4801 cut-off events. [2024-06-27 21:31:54,184 INFO L125 PetriNetUnfolderBase]: For 935702/935702 co-relation queries the response was YES. [2024-06-27 21:31:54,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68235 conditions, 4801 events. 2983/4801 cut-off events. For 935702/935702 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 28744 event pairs, 601 based on Foata normal form. 5/4805 useless extension candidates. Maximal degree in co-relation 68097. Up to 4446 conditions per place. [2024-06-27 21:31:54,252 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 470 selfloop transitions, 55 changer transitions 0/530 dead transitions. [2024-06-27 21:31:54,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 530 transitions, 11886 flow [2024-06-27 21:31:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:31:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:31:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 21:31:54,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-27 21:31:54,254 INFO L175 Difference]: Start difference. First operand has 290 places, 473 transitions, 9575 flow. Second operand 12 states and 189 transitions. [2024-06-27 21:31:54,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 530 transitions, 11886 flow [2024-06-27 21:31:55,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 530 transitions, 11758 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:55,407 INFO L231 Difference]: Finished difference. Result has 300 places, 498 transitions, 10278 flow [2024-06-27 21:31:55,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9447, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10278, PETRI_PLACES=300, PETRI_TRANSITIONS=498} [2024-06-27 21:31:55,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-27 21:31:55,407 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 498 transitions, 10278 flow [2024-06-27 21:31:55,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:55,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:55,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:55,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:31:55,408 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:55,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 55985524, now seen corresponding path program 7 times [2024-06-27 21:31:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:55,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544767794] [2024-06-27 21:31:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:58,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:58,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544767794] [2024-06-27 21:31:58,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544767794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:58,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:58,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328732404] [2024-06-27 21:31:58,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:58,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:58,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:58,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 498 transitions, 10278 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:58,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:58,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:58,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:00,500 INFO L124 PetriNetUnfolderBase]: 3044/4894 cut-off events. [2024-06-27 21:32:00,500 INFO L125 PetriNetUnfolderBase]: For 988707/988707 co-relation queries the response was YES. [2024-06-27 21:32:00,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70737 conditions, 4894 events. 3044/4894 cut-off events. For 988707/988707 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29477 event pairs, 374 based on Foata normal form. 5/4898 useless extension candidates. Maximal degree in co-relation 70595. Up to 3854 conditions per place. [2024-06-27 21:32:00,575 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 336 selfloop transitions, 195 changer transitions 0/536 dead transitions. [2024-06-27 21:32:00,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 536 transitions, 11968 flow [2024-06-27 21:32:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:32:00,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:32:00,576 INFO L175 Difference]: Start difference. First operand has 300 places, 498 transitions, 10278 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:32:00,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 536 transitions, 11968 flow [2024-06-27 21:32:01,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 536 transitions, 11765 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:01,946 INFO L231 Difference]: Finished difference. Result has 306 places, 509 transitions, 11011 flow [2024-06-27 21:32:01,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10075, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11011, PETRI_PLACES=306, PETRI_TRANSITIONS=509} [2024-06-27 21:32:01,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-27 21:32:01,946 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 509 transitions, 11011 flow [2024-06-27 21:32:01,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:01,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:01,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:01,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:32:01,947 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:01,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:01,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2054155778, now seen corresponding path program 8 times [2024-06-27 21:32:01,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:01,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837201772] [2024-06-27 21:32:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:01,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:04,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:04,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837201772] [2024-06-27 21:32:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837201772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:04,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:04,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185947079] [2024-06-27 21:32:04,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:04,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:04,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:04,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:04,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 509 transitions, 11011 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:04,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:04,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:04,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:06,837 INFO L124 PetriNetUnfolderBase]: 3095/4972 cut-off events. [2024-06-27 21:32:06,837 INFO L125 PetriNetUnfolderBase]: For 1030375/1030375 co-relation queries the response was YES. [2024-06-27 21:32:06,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73989 conditions, 4972 events. 3095/4972 cut-off events. For 1030375/1030375 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 29885 event pairs, 459 based on Foata normal form. 5/4973 useless extension candidates. Maximal degree in co-relation 73844. Up to 3235 conditions per place. [2024-06-27 21:32:06,913 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 264 selfloop transitions, 296 changer transitions 0/565 dead transitions. [2024-06-27 21:32:06,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 565 transitions, 13454 flow [2024-06-27 21:32:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:32:06,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-27 21:32:06,914 INFO L175 Difference]: Start difference. First operand has 306 places, 509 transitions, 11011 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:32:06,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 565 transitions, 13454 flow [2024-06-27 21:32:08,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 565 transitions, 13292 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:08,617 INFO L231 Difference]: Finished difference. Result has 311 places, 532 transitions, 12433 flow [2024-06-27 21:32:08,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10849, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12433, PETRI_PLACES=311, PETRI_TRANSITIONS=532} [2024-06-27 21:32:08,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 21:32:08,618 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 532 transitions, 12433 flow [2024-06-27 21:32:08,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:08,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:08,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:08,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:32:08,618 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:08,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2062424408, now seen corresponding path program 9 times [2024-06-27 21:32:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:08,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607160696] [2024-06-27 21:32:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:08,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:11,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:11,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607160696] [2024-06-27 21:32:11,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607160696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:11,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:11,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:11,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48728957] [2024-06-27 21:32:11,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:11,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:11,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:11,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:11,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 532 transitions, 12433 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:11,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:11,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:11,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:13,875 INFO L124 PetriNetUnfolderBase]: 3159/5069 cut-off events. [2024-06-27 21:32:13,875 INFO L125 PetriNetUnfolderBase]: For 1107029/1107029 co-relation queries the response was YES. [2024-06-27 21:32:13,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78737 conditions, 5069 events. 3159/5069 cut-off events. For 1107029/1107029 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30470 event pairs, 621 based on Foata normal form. 4/5069 useless extension candidates. Maximal degree in co-relation 78590. Up to 4555 conditions per place. [2024-06-27 21:32:13,953 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 468 selfloop transitions, 110 changer transitions 0/583 dead transitions. [2024-06-27 21:32:13,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 583 transitions, 14578 flow [2024-06-27 21:32:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:32:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:32:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-27 21:32:13,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37924865831842575 [2024-06-27 21:32:13,954 INFO L175 Difference]: Start difference. First operand has 311 places, 532 transitions, 12433 flow. Second operand 13 states and 212 transitions. [2024-06-27 21:32:13,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 583 transitions, 14578 flow [2024-06-27 21:32:15,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 583 transitions, 14359 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:15,922 INFO L231 Difference]: Finished difference. Result has 321 places, 546 transitions, 13038 flow [2024-06-27 21:32:15,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12241, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13038, PETRI_PLACES=321, PETRI_TRANSITIONS=546} [2024-06-27 21:32:15,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-27 21:32:15,923 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 546 transitions, 13038 flow [2024-06-27 21:32:15,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:15,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:15,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:15,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:32:15,924 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:15,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash 47265689, now seen corresponding path program 3 times [2024-06-27 21:32:15,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:15,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772861421] [2024-06-27 21:32:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:15,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:18,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772861421] [2024-06-27 21:32:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772861421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:18,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455487028] [2024-06-27 21:32:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:18,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:18,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:18,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 546 transitions, 13038 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:18,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:18,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:18,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:20,967 INFO L124 PetriNetUnfolderBase]: 3164/5086 cut-off events. [2024-06-27 21:32:20,967 INFO L125 PetriNetUnfolderBase]: For 1111476/1111476 co-relation queries the response was YES. [2024-06-27 21:32:21,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78124 conditions, 5086 events. 3164/5086 cut-off events. For 1111476/1111476 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30776 event pairs, 372 based on Foata normal form. 1/5083 useless extension candidates. Maximal degree in co-relation 77973. Up to 4017 conditions per place. [2024-06-27 21:32:21,052 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 388 selfloop transitions, 181 changer transitions 0/574 dead transitions. [2024-06-27 21:32:21,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 574 transitions, 14486 flow [2024-06-27 21:32:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:32:21,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:32:21,053 INFO L175 Difference]: Start difference. First operand has 321 places, 546 transitions, 13038 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:32:21,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 574 transitions, 14486 flow [2024-06-27 21:32:22,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 574 transitions, 14072 flow, removed 144 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:22,800 INFO L231 Difference]: Finished difference. Result has 323 places, 549 transitions, 13084 flow [2024-06-27 21:32:22,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12624, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13084, PETRI_PLACES=323, PETRI_TRANSITIONS=549} [2024-06-27 21:32:22,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-27 21:32:22,801 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 549 transitions, 13084 flow [2024-06-27 21:32:22,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:22,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:22,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:22,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:32:22,802 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:22,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2062429988, now seen corresponding path program 10 times [2024-06-27 21:32:22,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:22,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353971395] [2024-06-27 21:32:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:22,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:25,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353971395] [2024-06-27 21:32:25,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353971395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:25,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:25,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:25,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001993638] [2024-06-27 21:32:25,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:25,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:25,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:25,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 549 transitions, 13084 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:25,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:25,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:25,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:28,118 INFO L124 PetriNetUnfolderBase]: 3270/5237 cut-off events. [2024-06-27 21:32:28,118 INFO L125 PetriNetUnfolderBase]: For 1183907/1183907 co-relation queries the response was YES. [2024-06-27 21:32:28,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81304 conditions, 5237 events. 3270/5237 cut-off events. For 1183907/1183907 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31554 event pairs, 455 based on Foata normal form. 5/5238 useless extension candidates. Maximal degree in co-relation 81153. Up to 3753 conditions per place. [2024-06-27 21:32:28,201 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 332 selfloop transitions, 271 changer transitions 0/608 dead transitions. [2024-06-27 21:32:28,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 608 transitions, 15434 flow [2024-06-27 21:32:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:32:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:32:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-27 21:32:28,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 21:32:28,203 INFO L175 Difference]: Start difference. First operand has 323 places, 549 transitions, 13084 flow. Second operand 12 states and 213 transitions. [2024-06-27 21:32:28,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 608 transitions, 15434 flow [2024-06-27 21:32:30,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 608 transitions, 15267 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:30,160 INFO L231 Difference]: Finished difference. Result has 331 places, 562 transitions, 13996 flow [2024-06-27 21:32:30,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12917, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13996, PETRI_PLACES=331, PETRI_TRANSITIONS=562} [2024-06-27 21:32:30,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-27 21:32:30,161 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 562 transitions, 13996 flow [2024-06-27 21:32:30,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:30,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:30,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:30,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:32:30,162 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:30,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:30,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1930716277, now seen corresponding path program 4 times [2024-06-27 21:32:30,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:30,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553693910] [2024-06-27 21:32:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:30,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:33,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:33,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553693910] [2024-06-27 21:32:33,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553693910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:33,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:33,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:33,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494451209] [2024-06-27 21:32:33,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:33,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:33,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:33,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:33,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:33,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 562 transitions, 13996 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:33,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:33,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:33,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:35,461 INFO L124 PetriNetUnfolderBase]: 3280/5247 cut-off events. [2024-06-27 21:32:35,461 INFO L125 PetriNetUnfolderBase]: For 1218883/1218883 co-relation queries the response was YES. [2024-06-27 21:32:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83607 conditions, 5247 events. 3280/5247 cut-off events. For 1218883/1218883 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31568 event pairs, 615 based on Foata normal form. 2/5245 useless extension candidates. Maximal degree in co-relation 83453. Up to 4706 conditions per place. [2024-06-27 21:32:35,546 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 478 selfloop transitions, 115 changer transitions 0/598 dead transitions. [2024-06-27 21:32:35,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 598 transitions, 15978 flow [2024-06-27 21:32:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:32:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:32:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:32:35,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-27 21:32:35,548 INFO L175 Difference]: Start difference. First operand has 331 places, 562 transitions, 13996 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:32:35,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 598 transitions, 15978 flow [2024-06-27 21:32:37,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 598 transitions, 15496 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:37,768 INFO L231 Difference]: Finished difference. Result has 334 places, 571 transitions, 14050 flow [2024-06-27 21:32:37,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13520, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14050, PETRI_PLACES=334, PETRI_TRANSITIONS=571} [2024-06-27 21:32:37,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-27 21:32:37,769 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 571 transitions, 14050 flow [2024-06-27 21:32:37,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:37,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:37,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:37,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:32:37,769 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:37,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1074986731, now seen corresponding path program 1 times [2024-06-27 21:32:37,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:37,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235427428] [2024-06-27 21:32:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:37,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:40,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:40,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235427428] [2024-06-27 21:32:40,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235427428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:40,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:40,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228200121] [2024-06-27 21:32:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:40,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:40,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:40,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:40,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 571 transitions, 14050 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:40,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:40,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:40,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:42,877 INFO L124 PetriNetUnfolderBase]: 3269/5233 cut-off events. [2024-06-27 21:32:42,877 INFO L125 PetriNetUnfolderBase]: For 1203308/1203308 co-relation queries the response was YES. [2024-06-27 21:32:42,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82351 conditions, 5233 events. 3269/5233 cut-off events. For 1203308/1203308 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31542 event pairs, 622 based on Foata normal form. 5/5237 useless extension candidates. Maximal degree in co-relation 82196. Up to 4941 conditions per place. [2024-06-27 21:32:42,969 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 550 selfloop transitions, 35 changer transitions 0/590 dead transitions. [2024-06-27 21:32:42,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 590 transitions, 15484 flow [2024-06-27 21:32:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:32:42,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-27 21:32:42,970 INFO L175 Difference]: Start difference. First operand has 334 places, 571 transitions, 14050 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:32:42,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 590 transitions, 15484 flow [2024-06-27 21:32:45,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 590 transitions, 15146 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:45,669 INFO L231 Difference]: Finished difference. Result has 337 places, 571 transitions, 13802 flow [2024-06-27 21:32:45,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13712, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13802, PETRI_PLACES=337, PETRI_TRANSITIONS=571} [2024-06-27 21:32:45,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-27 21:32:45,670 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 571 transitions, 13802 flow [2024-06-27 21:32:45,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:45,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:45,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:45,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:32:45,670 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:45,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2048130246, now seen corresponding path program 1 times [2024-06-27 21:32:45,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:45,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856838849] [2024-06-27 21:32:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:45,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:49,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856838849] [2024-06-27 21:32:49,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856838849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:49,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:49,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:32:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813485834] [2024-06-27 21:32:49,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:49,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:32:49,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:32:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:32:49,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:49,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 571 transitions, 13802 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:49,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:49,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:49,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:51,900 INFO L124 PetriNetUnfolderBase]: 3264/5226 cut-off events. [2024-06-27 21:32:51,900 INFO L125 PetriNetUnfolderBase]: For 1213190/1213190 co-relation queries the response was YES. [2024-06-27 21:32:51,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82219 conditions, 5226 events. 3264/5226 cut-off events. For 1213190/1213190 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 31500 event pairs, 612 based on Foata normal form. 2/5227 useless extension candidates. Maximal degree in co-relation 82062. Up to 4947 conditions per place. [2024-06-27 21:32:51,986 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 553 selfloop transitions, 35 changer transitions 0/593 dead transitions. [2024-06-27 21:32:51,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 593 transitions, 15081 flow [2024-06-27 21:32:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:32:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:32:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-27 21:32:51,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511627906976744 [2024-06-27 21:32:51,988 INFO L175 Difference]: Start difference. First operand has 337 places, 571 transitions, 13802 flow. Second operand 10 states and 151 transitions. [2024-06-27 21:32:51,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 593 transitions, 15081 flow [2024-06-27 21:32:53,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 593 transitions, 14924 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:53,995 INFO L231 Difference]: Finished difference. Result has 341 places, 573 transitions, 13772 flow [2024-06-27 21:32:53,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13645, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13772, PETRI_PLACES=341, PETRI_TRANSITIONS=573} [2024-06-27 21:32:53,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-27 21:32:53,995 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 573 transitions, 13772 flow [2024-06-27 21:32:53,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:53,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:53,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:53,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:32:53,996 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:53,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:53,996 INFO L85 PathProgramCache]: Analyzing trace with hash 61565369, now seen corresponding path program 1 times [2024-06-27 21:32:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:53,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389605544] [2024-06-27 21:32:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:53,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:57,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:57,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389605544] [2024-06-27 21:32:57,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389605544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:57,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:57,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:32:57,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465404100] [2024-06-27 21:32:57,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:57,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:32:57,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:32:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:32:57,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:57,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 573 transitions, 13772 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:57,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:57,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:57,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:59,553 INFO L124 PetriNetUnfolderBase]: 3271/5238 cut-off events. [2024-06-27 21:32:59,554 INFO L125 PetriNetUnfolderBase]: For 1208866/1208866 co-relation queries the response was YES. [2024-06-27 21:32:59,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82192 conditions, 5238 events. 3271/5238 cut-off events. For 1208866/1208866 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 31568 event pairs, 613 based on Foata normal form. 1/5238 useless extension candidates. Maximal degree in co-relation 82034. Up to 4967 conditions per place. [2024-06-27 21:32:59,641 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 564 selfloop transitions, 29 changer transitions 0/598 dead transitions. [2024-06-27 21:32:59,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 598 transitions, 15127 flow [2024-06-27 21:32:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 21:32:59,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-27 21:32:59,643 INFO L175 Difference]: Start difference. First operand has 341 places, 573 transitions, 13772 flow. Second operand 9 states and 138 transitions. [2024-06-27 21:32:59,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 598 transitions, 15127 flow [2024-06-27 21:33:01,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 598 transitions, 15035 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:01,632 INFO L231 Difference]: Finished difference. Result has 343 places, 579 transitions, 13856 flow [2024-06-27 21:33:01,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13680, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13856, PETRI_PLACES=343, PETRI_TRANSITIONS=579} [2024-06-27 21:33:01,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-27 21:33:01,632 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 579 transitions, 13856 flow [2024-06-27 21:33:01,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:01,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:01,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:01,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:33:01,633 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:01,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:01,634 INFO L85 PathProgramCache]: Analyzing trace with hash 61573026, now seen corresponding path program 2 times [2024-06-27 21:33:01,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:01,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390036240] [2024-06-27 21:33:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:01,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:05,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:05,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390036240] [2024-06-27 21:33:05,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390036240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:05,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:05,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:33:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761950068] [2024-06-27 21:33:05,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:05,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:33:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:33:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:33:05,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:05,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 579 transitions, 13856 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:05,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:05,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:05,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:07,312 INFO L124 PetriNetUnfolderBase]: 3266/5227 cut-off events. [2024-06-27 21:33:07,312 INFO L125 PetriNetUnfolderBase]: For 1225738/1225738 co-relation queries the response was YES. [2024-06-27 21:33:07,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82409 conditions, 5227 events. 3266/5227 cut-off events. For 1225738/1225738 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31456 event pairs, 608 based on Foata normal form. 2/5228 useless extension candidates. Maximal degree in co-relation 82251. Up to 4954 conditions per place. [2024-06-27 21:33:07,399 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 566 selfloop transitions, 30 changer transitions 0/601 dead transitions. [2024-06-27 21:33:07,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 601 transitions, 15159 flow [2024-06-27 21:33:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:33:07,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-27 21:33:07,400 INFO L175 Difference]: Start difference. First operand has 343 places, 579 transitions, 13856 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:33:07,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 601 transitions, 15159 flow [2024-06-27 21:33:09,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 601 transitions, 15048 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:09,415 INFO L231 Difference]: Finished difference. Result has 345 places, 580 transitions, 13863 flow [2024-06-27 21:33:09,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13745, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13863, PETRI_PLACES=345, PETRI_TRANSITIONS=580} [2024-06-27 21:33:09,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-27 21:33:09,416 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 580 transitions, 13863 flow [2024-06-27 21:33:09,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:09,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:09,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:33:09,417 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:09,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash 851089436, now seen corresponding path program 3 times [2024-06-27 21:33:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869592332] [2024-06-27 21:33:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:09,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:09,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869592332] [2024-06-27 21:33:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869592332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:09,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:09,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:33:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825102137] [2024-06-27 21:33:09,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:33:09,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:33:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:33:09,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 21:33:09,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 580 transitions, 13863 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:09,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:09,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 21:33:09,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:11,408 INFO L124 PetriNetUnfolderBase]: 2796/4735 cut-off events. [2024-06-27 21:33:11,408 INFO L125 PetriNetUnfolderBase]: For 1426728/1426796 co-relation queries the response was YES. [2024-06-27 21:33:11,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80782 conditions, 4735 events. 2796/4735 cut-off events. For 1426728/1426796 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31377 event pairs, 638 based on Foata normal form. 104/4593 useless extension candidates. Maximal degree in co-relation 80623. Up to 2366 conditions per place. [2024-06-27 21:33:11,489 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 161 selfloop transitions, 174 changer transitions 0/599 dead transitions. [2024-06-27 21:33:11,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 599 transitions, 14844 flow [2024-06-27 21:33:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:33:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:33:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-27 21:33:11,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 21:33:11,490 INFO L175 Difference]: Start difference. First operand has 345 places, 580 transitions, 13863 flow. Second operand 5 states and 100 transitions. [2024-06-27 21:33:11,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 599 transitions, 14844 flow [2024-06-27 21:33:13,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 599 transitions, 14719 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:13,626 INFO L231 Difference]: Finished difference. Result has 344 places, 591 transitions, 14425 flow [2024-06-27 21:33:13,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13458, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=14425, PETRI_PLACES=344, PETRI_TRANSITIONS=591} [2024-06-27 21:33:13,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 21:33:13,627 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 591 transitions, 14425 flow [2024-06-27 21:33:13,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:13,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:13,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:13,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:33:13,628 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:13,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash -905554475, now seen corresponding path program 1 times [2024-06-27 21:33:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:13,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436569532] [2024-06-27 21:33:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:13,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:16,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:16,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436569532] [2024-06-27 21:33:16,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436569532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:16,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:16,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:16,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838941094] [2024-06-27 21:33:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:16,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:17,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:17,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 591 transitions, 14425 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:17,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:17,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:17,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:19,740 INFO L124 PetriNetUnfolderBase]: 3476/5612 cut-off events. [2024-06-27 21:33:19,740 INFO L125 PetriNetUnfolderBase]: For 1410981/1410981 co-relation queries the response was YES. [2024-06-27 21:33:19,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89875 conditions, 5612 events. 3476/5612 cut-off events. For 1410981/1410981 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34797 event pairs, 646 based on Foata normal form. 8/5619 useless extension candidates. Maximal degree in co-relation 89714. Up to 5138 conditions per place. [2024-06-27 21:33:19,832 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 568 selfloop transitions, 58 changer transitions 0/631 dead transitions. [2024-06-27 21:33:19,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 631 transitions, 16247 flow [2024-06-27 21:33:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:33:19,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 21:33:19,833 INFO L175 Difference]: Start difference. First operand has 344 places, 591 transitions, 14425 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:33:19,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 631 transitions, 16247 flow [2024-06-27 21:33:22,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 631 transitions, 16240 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:33:22,165 INFO L231 Difference]: Finished difference. Result has 353 places, 599 transitions, 14835 flow [2024-06-27 21:33:22,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14418, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14835, PETRI_PLACES=353, PETRI_TRANSITIONS=599} [2024-06-27 21:33:22,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-27 21:33:22,166 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 599 transitions, 14835 flow [2024-06-27 21:33:22,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:22,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:22,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:33:22,166 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:22,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash -281427513, now seen corresponding path program 2 times [2024-06-27 21:33:22,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:22,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873885478] [2024-06-27 21:33:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:22,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:25,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:25,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873885478] [2024-06-27 21:33:25,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873885478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:25,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:25,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361292096] [2024-06-27 21:33:25,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:25,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:25,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:25,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:25,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 599 transitions, 14835 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:25,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:25,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:25,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:28,732 INFO L124 PetriNetUnfolderBase]: 3564/5771 cut-off events. [2024-06-27 21:33:28,732 INFO L125 PetriNetUnfolderBase]: For 1466931/1466931 co-relation queries the response was YES. [2024-06-27 21:33:28,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92322 conditions, 5771 events. 3564/5771 cut-off events. For 1466931/1466931 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 36047 event pairs, 504 based on Foata normal form. 8/5778 useless extension candidates. Maximal degree in co-relation 92157. Up to 4974 conditions per place. [2024-06-27 21:33:28,828 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 573 selfloop transitions, 79 changer transitions 0/657 dead transitions. [2024-06-27 21:33:28,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 657 transitions, 17114 flow [2024-06-27 21:33:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:33:28,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 21:33:28,829 INFO L175 Difference]: Start difference. First operand has 353 places, 599 transitions, 14835 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:33:28,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 657 transitions, 17114 flow [2024-06-27 21:33:30,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 657 transitions, 16947 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:30,923 INFO L231 Difference]: Finished difference. Result has 360 places, 612 transitions, 15407 flow [2024-06-27 21:33:30,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14683, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15407, PETRI_PLACES=360, PETRI_TRANSITIONS=612} [2024-06-27 21:33:30,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-27 21:33:30,923 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 612 transitions, 15407 flow [2024-06-27 21:33:30,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:30,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:30,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:30,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:33:30,924 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:30,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1405856549, now seen corresponding path program 3 times [2024-06-27 21:33:30,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:30,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071549835] [2024-06-27 21:33:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:30,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071549835] [2024-06-27 21:33:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071549835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:34,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:34,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:34,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702828198] [2024-06-27 21:33:34,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:34,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:34,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 612 transitions, 15407 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:34,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:34,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:34,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:37,122 INFO L124 PetriNetUnfolderBase]: 3592/5813 cut-off events. [2024-06-27 21:33:37,122 INFO L125 PetriNetUnfolderBase]: For 1502737/1502737 co-relation queries the response was YES. [2024-06-27 21:33:37,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93621 conditions, 5813 events. 3592/5813 cut-off events. For 1502737/1502737 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36347 event pairs, 668 based on Foata normal form. 8/5820 useless extension candidates. Maximal degree in co-relation 93453. Up to 5322 conditions per place. [2024-06-27 21:33:37,226 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 579 selfloop transitions, 69 changer transitions 0/653 dead transitions. [2024-06-27 21:33:37,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 653 transitions, 17058 flow [2024-06-27 21:33:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:33:37,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 21:33:37,227 INFO L175 Difference]: Start difference. First operand has 360 places, 612 transitions, 15407 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:33:37,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 653 transitions, 17058 flow [2024-06-27 21:33:39,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 653 transitions, 16922 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:39,930 INFO L231 Difference]: Finished difference. Result has 366 places, 613 transitions, 15478 flow [2024-06-27 21:33:39,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15272, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15478, PETRI_PLACES=366, PETRI_TRANSITIONS=613} [2024-06-27 21:33:39,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-27 21:33:39,931 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 613 transitions, 15478 flow [2024-06-27 21:33:39,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:39,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:39,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:33:39,932 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:39,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash -364929901, now seen corresponding path program 1 times [2024-06-27 21:33:39,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:39,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695713318] [2024-06-27 21:33:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:39,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:42,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695713318] [2024-06-27 21:33:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695713318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:42,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:42,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439656364] [2024-06-27 21:33:42,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:42,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:42,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:42,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 613 transitions, 15478 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:42,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:42,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:42,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:45,569 INFO L124 PetriNetUnfolderBase]: 3597/5817 cut-off events. [2024-06-27 21:33:45,569 INFO L125 PetriNetUnfolderBase]: For 1510129/1510129 co-relation queries the response was YES. [2024-06-27 21:33:45,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93749 conditions, 5817 events. 3597/5817 cut-off events. For 1510129/1510129 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 36384 event pairs, 673 based on Foata normal form. 1/5816 useless extension candidates. Maximal degree in co-relation 93580. Up to 5403 conditions per place. [2024-06-27 21:33:45,895 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 609 selfloop transitions, 34 changer transitions 0/648 dead transitions. [2024-06-27 21:33:45,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 648 transitions, 16992 flow [2024-06-27 21:33:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:33:45,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-27 21:33:45,897 INFO L175 Difference]: Start difference. First operand has 366 places, 613 transitions, 15478 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:33:45,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 648 transitions, 16992 flow [2024-06-27 21:33:48,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 648 transitions, 16858 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:48,304 INFO L231 Difference]: Finished difference. Result has 369 places, 616 transitions, 15554 flow [2024-06-27 21:33:48,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15344, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15554, PETRI_PLACES=369, PETRI_TRANSITIONS=616} [2024-06-27 21:33:48,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-27 21:33:48,305 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 616 transitions, 15554 flow [2024-06-27 21:33:48,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:48,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:48,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:48,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:33:48,305 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:48,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1324607843, now seen corresponding path program 1 times [2024-06-27 21:33:48,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:48,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909150104] [2024-06-27 21:33:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:48,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:52,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:52,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909150104] [2024-06-27 21:33:52,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909150104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:52,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:52,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:52,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659570607] [2024-06-27 21:33:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:52,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:52,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:52,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:52,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 616 transitions, 15554 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:52,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:52,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:52,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:55,347 INFO L124 PetriNetUnfolderBase]: 3607/5832 cut-off events. [2024-06-27 21:33:55,348 INFO L125 PetriNetUnfolderBase]: For 1541725/1541725 co-relation queries the response was YES. [2024-06-27 21:33:55,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94246 conditions, 5832 events. 3607/5832 cut-off events. For 1541725/1541725 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36476 event pairs, 664 based on Foata normal form. 2/5833 useless extension candidates. Maximal degree in co-relation 94077. Up to 5475 conditions per place. [2024-06-27 21:33:55,447 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 620 selfloop transitions, 27 changer transitions 0/652 dead transitions. [2024-06-27 21:33:55,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 652 transitions, 17138 flow [2024-06-27 21:33:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:33:55,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-27 21:33:55,448 INFO L175 Difference]: Start difference. First operand has 369 places, 616 transitions, 15554 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:33:55,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 652 transitions, 17138 flow [2024-06-27 21:33:58,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 652 transitions, 17018 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:58,216 INFO L231 Difference]: Finished difference. Result has 371 places, 619 transitions, 15672 flow [2024-06-27 21:33:58,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15434, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15672, PETRI_PLACES=371, PETRI_TRANSITIONS=619} [2024-06-27 21:33:58,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-27 21:33:58,217 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 619 transitions, 15672 flow [2024-06-27 21:33:58,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:58,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:58,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:58,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:33:58,217 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:58,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash -880575941, now seen corresponding path program 2 times [2024-06-27 21:33:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:58,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662569408] [2024-06-27 21:33:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:58,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662569408] [2024-06-27 21:34:02,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662569408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:02,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:02,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:02,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237242667] [2024-06-27 21:34:02,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:02,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:02,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:02,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:02,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:02,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 619 transitions, 15672 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:02,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:02,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:02,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:04,945 INFO L124 PetriNetUnfolderBase]: 3633/5872 cut-off events. [2024-06-27 21:34:04,945 INFO L125 PetriNetUnfolderBase]: For 1595854/1595854 co-relation queries the response was YES. [2024-06-27 21:34:05,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95910 conditions, 5872 events. 3633/5872 cut-off events. For 1595854/1595854 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36714 event pairs, 665 based on Foata normal form. 2/5873 useless extension candidates. Maximal degree in co-relation 95740. Up to 5512 conditions per place. [2024-06-27 21:34:05,047 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 615 selfloop transitions, 33 changer transitions 0/653 dead transitions. [2024-06-27 21:34:05,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 653 transitions, 17612 flow [2024-06-27 21:34:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:34:05,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-27 21:34:05,049 INFO L175 Difference]: Start difference. First operand has 371 places, 619 transitions, 15672 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:34:05,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 653 transitions, 17612 flow [2024-06-27 21:34:07,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 653 transitions, 17436 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:07,994 INFO L231 Difference]: Finished difference. Result has 373 places, 625 transitions, 15931 flow [2024-06-27 21:34:07,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15496, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15931, PETRI_PLACES=373, PETRI_TRANSITIONS=625} [2024-06-27 21:34:07,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-27 21:34:07,995 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 625 transitions, 15931 flow [2024-06-27 21:34:07,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:07,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:07,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:07,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:34:07,995 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:07,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:07,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1593980085, now seen corresponding path program 2 times [2024-06-27 21:34:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:07,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648203548] [2024-06-27 21:34:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:07,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:10,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:10,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648203548] [2024-06-27 21:34:10,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648203548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:10,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:10,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:10,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189712262] [2024-06-27 21:34:10,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:10,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:10,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:10,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 625 transitions, 15931 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:10,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:10,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:10,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:13,811 INFO L124 PetriNetUnfolderBase]: 3626/5858 cut-off events. [2024-06-27 21:34:13,811 INFO L125 PetriNetUnfolderBase]: For 1627962/1627962 co-relation queries the response was YES. [2024-06-27 21:34:13,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96213 conditions, 5858 events. 3626/5858 cut-off events. For 1627962/1627962 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36579 event pairs, 672 based on Foata normal form. 1/5858 useless extension candidates. Maximal degree in co-relation 96042. Up to 5454 conditions per place. [2024-06-27 21:34:13,919 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 622 selfloop transitions, 41 changer transitions 0/668 dead transitions. [2024-06-27 21:34:13,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 668 transitions, 17586 flow [2024-06-27 21:34:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:34:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:34:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 21:34:13,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39112050739957716 [2024-06-27 21:34:13,921 INFO L175 Difference]: Start difference. First operand has 373 places, 625 transitions, 15931 flow. Second operand 11 states and 185 transitions. [2024-06-27 21:34:13,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 668 transitions, 17586 flow [2024-06-27 21:34:17,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 668 transitions, 17394 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:17,206 INFO L231 Difference]: Finished difference. Result has 380 places, 627 transitions, 15885 flow [2024-06-27 21:34:17,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15739, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15885, PETRI_PLACES=380, PETRI_TRANSITIONS=627} [2024-06-27 21:34:17,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-27 21:34:17,207 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 627 transitions, 15885 flow [2024-06-27 21:34:17,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:17,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:17,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:17,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:34:17,207 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:17,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash -880962077, now seen corresponding path program 3 times [2024-06-27 21:34:17,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:17,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876560958] [2024-06-27 21:34:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:17,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:20,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:20,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876560958] [2024-06-27 21:34:20,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876560958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:20,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:20,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:20,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122540072] [2024-06-27 21:34:20,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:20,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:20,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:20,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:20,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 627 transitions, 15885 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:20,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:20,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:20,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:23,574 INFO L124 PetriNetUnfolderBase]: 3652/5897 cut-off events. [2024-06-27 21:34:23,575 INFO L125 PetriNetUnfolderBase]: For 1662464/1662464 co-relation queries the response was YES. [2024-06-27 21:34:23,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97322 conditions, 5897 events. 3652/5897 cut-off events. For 1662464/1662464 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 36911 event pairs, 555 based on Foata normal form. 1/5897 useless extension candidates. Maximal degree in co-relation 97148. Up to 4770 conditions per place. [2024-06-27 21:34:23,687 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 488 selfloop transitions, 192 changer transitions 0/685 dead transitions. [2024-06-27 21:34:23,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 685 transitions, 18052 flow [2024-06-27 21:34:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:34:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:34:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 222 transitions. [2024-06-27 21:34:23,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39713774597495527 [2024-06-27 21:34:23,689 INFO L175 Difference]: Start difference. First operand has 380 places, 627 transitions, 15885 flow. Second operand 13 states and 222 transitions. [2024-06-27 21:34:23,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 685 transitions, 18052 flow [2024-06-27 21:34:26,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 685 transitions, 17966 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:26,840 INFO L231 Difference]: Finished difference. Result has 387 places, 635 transitions, 16521 flow [2024-06-27 21:34:26,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15799, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16521, PETRI_PLACES=387, PETRI_TRANSITIONS=635} [2024-06-27 21:34:26,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-27 21:34:26,841 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 635 transitions, 16521 flow [2024-06-27 21:34:26,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:26,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:26,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:26,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:34:26,841 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:26,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1339968029, now seen corresponding path program 3 times [2024-06-27 21:34:26,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:26,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032352919] [2024-06-27 21:34:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:30,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:30,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032352919] [2024-06-27 21:34:30,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032352919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:30,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:30,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487799620] [2024-06-27 21:34:30,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:30,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:30,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:30,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:30,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:30,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 635 transitions, 16521 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:30,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:30,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:30,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:32,956 INFO L124 PetriNetUnfolderBase]: 3646/5891 cut-off events. [2024-06-27 21:34:32,956 INFO L125 PetriNetUnfolderBase]: For 1705079/1705079 co-relation queries the response was YES. [2024-06-27 21:34:33,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98364 conditions, 5891 events. 3646/5891 cut-off events. For 1705079/1705079 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36844 event pairs, 664 based on Foata normal form. 2/5892 useless extension candidates. Maximal degree in co-relation 98188. Up to 5534 conditions per place. [2024-06-27 21:34:33,063 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 624 selfloop transitions, 33 changer transitions 0/662 dead transitions. [2024-06-27 21:34:33,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 662 transitions, 17951 flow [2024-06-27 21:34:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:34:33,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-27 21:34:33,064 INFO L175 Difference]: Start difference. First operand has 387 places, 635 transitions, 16521 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:34:33,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 662 transitions, 17951 flow [2024-06-27 21:34:36,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 662 transitions, 17685 flow, removed 114 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:36,306 INFO L231 Difference]: Finished difference. Result has 388 places, 635 transitions, 16327 flow [2024-06-27 21:34:36,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16255, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16327, PETRI_PLACES=388, PETRI_TRANSITIONS=635} [2024-06-27 21:34:36,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-27 21:34:36,306 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 635 transitions, 16327 flow [2024-06-27 21:34:36,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:36,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:36,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:36,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:34:36,307 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:36,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash -880746627, now seen corresponding path program 1 times [2024-06-27 21:34:36,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:36,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499895099] [2024-06-27 21:34:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:39,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499895099] [2024-06-27 21:34:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499895099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:39,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:39,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:34:39,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624497707] [2024-06-27 21:34:39,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:39,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:34:39,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:34:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:34:39,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:39,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 635 transitions, 16327 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:39,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:39,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:39,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:42,749 INFO L124 PetriNetUnfolderBase]: 3698/5966 cut-off events. [2024-06-27 21:34:42,749 INFO L125 PetriNetUnfolderBase]: For 1768079/1768079 co-relation queries the response was YES. [2024-06-27 21:34:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99862 conditions, 5966 events. 3698/5966 cut-off events. For 1768079/1768079 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 37393 event pairs, 663 based on Foata normal form. 4/5968 useless extension candidates. Maximal degree in co-relation 99684. Up to 5529 conditions per place. [2024-06-27 21:34:42,851 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 617 selfloop transitions, 54 changer transitions 0/676 dead transitions. [2024-06-27 21:34:42,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 676 transitions, 18404 flow [2024-06-27 21:34:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:34:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:34:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-27 21:34:42,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266384778012685 [2024-06-27 21:34:42,852 INFO L175 Difference]: Start difference. First operand has 388 places, 635 transitions, 16327 flow. Second operand 11 states and 181 transitions. [2024-06-27 21:34:42,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 676 transitions, 18404 flow [2024-06-27 21:34:45,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 676 transitions, 18320 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:45,692 INFO L231 Difference]: Finished difference. Result has 392 places, 646 transitions, 16817 flow [2024-06-27 21:34:45,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16243, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16817, PETRI_PLACES=392, PETRI_TRANSITIONS=646} [2024-06-27 21:34:45,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-27 21:34:45,693 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 646 transitions, 16817 flow [2024-06-27 21:34:45,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:45,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:45,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:45,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:34:45,693 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:45,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1486780641, now seen corresponding path program 2 times [2024-06-27 21:34:45,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:45,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24056659] [2024-06-27 21:34:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:45,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:49,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24056659] [2024-06-27 21:34:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24056659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:49,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:49,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:34:49,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508873597] [2024-06-27 21:34:49,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:49,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:34:49,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:34:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:34:49,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:49,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 646 transitions, 16817 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:49,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:49,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:49,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:52,565 INFO L124 PetriNetUnfolderBase]: 3781/6088 cut-off events. [2024-06-27 21:34:52,565 INFO L125 PetriNetUnfolderBase]: For 1855797/1855797 co-relation queries the response was YES. [2024-06-27 21:34:52,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102923 conditions, 6088 events. 3781/6088 cut-off events. For 1855797/1855797 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 38151 event pairs, 530 based on Foata normal form. 8/6095 useless extension candidates. Maximal degree in co-relation 102743. Up to 4800 conditions per place. [2024-06-27 21:34:52,673 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 472 selfloop transitions, 227 changer transitions 0/704 dead transitions. [2024-06-27 21:34:52,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 704 transitions, 18945 flow [2024-06-27 21:34:52,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:34:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:34:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2024-06-27 21:34:52,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39177101967799643 [2024-06-27 21:34:52,675 INFO L175 Difference]: Start difference. First operand has 392 places, 646 transitions, 16817 flow. Second operand 13 states and 219 transitions. [2024-06-27 21:34:52,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 704 transitions, 18945 flow [2024-06-27 21:34:55,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 704 transitions, 18511 flow, removed 195 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:55,950 INFO L231 Difference]: Finished difference. Result has 401 places, 658 transitions, 17448 flow [2024-06-27 21:34:55,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16383, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17448, PETRI_PLACES=401, PETRI_TRANSITIONS=658} [2024-06-27 21:34:55,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-27 21:34:55,952 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 658 transitions, 17448 flow [2024-06-27 21:34:55,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:55,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:55,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:55,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:34:55,953 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:55,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:55,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1486773697, now seen corresponding path program 1 times [2024-06-27 21:34:55,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:55,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644170137] [2024-06-27 21:34:55,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:55,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:00,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:00,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644170137] [2024-06-27 21:35:00,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644170137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:00,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:00,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:00,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227374905] [2024-06-27 21:35:00,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:00,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:00,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:00,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:00,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:00,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:00,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 658 transitions, 17448 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:00,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:00,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:00,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:03,626 INFO L124 PetriNetUnfolderBase]: 3819/6141 cut-off events. [2024-06-27 21:35:03,626 INFO L125 PetriNetUnfolderBase]: For 2006267/2006267 co-relation queries the response was YES. [2024-06-27 21:35:03,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106321 conditions, 6141 events. 3819/6141 cut-off events. For 2006267/2006267 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38511 event pairs, 671 based on Foata normal form. 18/6158 useless extension candidates. Maximal degree in co-relation 106137. Up to 5505 conditions per place. [2024-06-27 21:35:03,730 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 605 selfloop transitions, 86 changer transitions 0/696 dead transitions. [2024-06-27 21:35:03,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 696 transitions, 19269 flow [2024-06-27 21:35:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:35:03,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 21:35:03,731 INFO L175 Difference]: Start difference. First operand has 401 places, 658 transitions, 17448 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:35:03,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 696 transitions, 19269 flow [2024-06-27 21:35:06,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 696 transitions, 19080 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:06,753 INFO L231 Difference]: Finished difference. Result has 403 places, 657 transitions, 17403 flow [2024-06-27 21:35:06,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17073, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17403, PETRI_PLACES=403, PETRI_TRANSITIONS=657} [2024-06-27 21:35:06,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-27 21:35:06,754 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 657 transitions, 17403 flow [2024-06-27 21:35:06,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:06,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:06,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:06,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:35:06,754 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:06,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash -880746751, now seen corresponding path program 1 times [2024-06-27 21:35:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:06,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646165747] [2024-06-27 21:35:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:06,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:09,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:09,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646165747] [2024-06-27 21:35:09,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646165747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:09,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:09,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:09,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499326696] [2024-06-27 21:35:09,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:09,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:09,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:09,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:09,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 657 transitions, 17403 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:09,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:09,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:09,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:13,578 INFO L124 PetriNetUnfolderBase]: 3855/6198 cut-off events. [2024-06-27 21:35:13,578 INFO L125 PetriNetUnfolderBase]: For 2034052/2034052 co-relation queries the response was YES. [2024-06-27 21:35:13,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107618 conditions, 6198 events. 3855/6198 cut-off events. For 2034052/2034052 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 38934 event pairs, 680 based on Foata normal form. 10/6207 useless extension candidates. Maximal degree in co-relation 107432. Up to 5764 conditions per place. [2024-06-27 21:35:13,691 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 658 selfloop transitions, 42 changer transitions 0/705 dead transitions. [2024-06-27 21:35:13,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 705 transitions, 19299 flow [2024-06-27 21:35:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:35:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:35:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-27 21:35:13,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-27 21:35:13,692 INFO L175 Difference]: Start difference. First operand has 403 places, 657 transitions, 17403 flow. Second operand 12 states and 201 transitions. [2024-06-27 21:35:13,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 705 transitions, 19299 flow [2024-06-27 21:35:16,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 705 transitions, 19094 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:16,804 INFO L231 Difference]: Finished difference. Result has 408 places, 659 transitions, 17388 flow [2024-06-27 21:35:16,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17198, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17388, PETRI_PLACES=408, PETRI_TRANSITIONS=659} [2024-06-27 21:35:16,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-27 21:35:16,805 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 659 transitions, 17388 flow [2024-06-27 21:35:16,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:16,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:16,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:16,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:35:16,806 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:16,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:16,806 INFO L85 PathProgramCache]: Analyzing trace with hash -880562301, now seen corresponding path program 1 times [2024-06-27 21:35:16,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:16,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066791840] [2024-06-27 21:35:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:16,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:21,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:21,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066791840] [2024-06-27 21:35:21,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066791840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:21,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:21,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679473261] [2024-06-27 21:35:21,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:21,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:21,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:21,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:21,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 659 transitions, 17388 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:21,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:21,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:21,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:25,053 INFO L124 PetriNetUnfolderBase]: 3925/6305 cut-off events. [2024-06-27 21:35:25,053 INFO L125 PetriNetUnfolderBase]: For 2071833/2071833 co-relation queries the response was YES. [2024-06-27 21:35:25,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110152 conditions, 6305 events. 3925/6305 cut-off events. For 2071833/2071833 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 39701 event pairs, 558 based on Foata normal form. 2/6306 useless extension candidates. Maximal degree in co-relation 109965. Up to 4994 conditions per place. [2024-06-27 21:35:25,171 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 486 selfloop transitions, 231 changer transitions 0/722 dead transitions. [2024-06-27 21:35:25,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 722 transitions, 19861 flow [2024-06-27 21:35:25,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:35:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:35:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-27 21:35:25,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 21:35:25,173 INFO L175 Difference]: Start difference. First operand has 408 places, 659 transitions, 17388 flow. Second operand 12 states and 213 transitions. [2024-06-27 21:35:25,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 722 transitions, 19861 flow [2024-06-27 21:35:28,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 722 transitions, 19762 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:28,421 INFO L231 Difference]: Finished difference. Result has 413 places, 671 transitions, 18314 flow [2024-06-27 21:35:28,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17289, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18314, PETRI_PLACES=413, PETRI_TRANSITIONS=671} [2024-06-27 21:35:28,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-27 21:35:28,422 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 671 transitions, 18314 flow [2024-06-27 21:35:28,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:28,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:28,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:35:28,423 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:28,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1857293293, now seen corresponding path program 2 times [2024-06-27 21:35:28,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833939787] [2024-06-27 21:35:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:31,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:31,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833939787] [2024-06-27 21:35:31,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833939787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:31,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:31,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:31,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974262504] [2024-06-27 21:35:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:31,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:31,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:31,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:31,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 671 transitions, 18314 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:31,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:31,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:31,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:35,402 INFO L124 PetriNetUnfolderBase]: 3950/6353 cut-off events. [2024-06-27 21:35:35,402 INFO L125 PetriNetUnfolderBase]: For 2226578/2226578 co-relation queries the response was YES. [2024-06-27 21:35:35,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111960 conditions, 6353 events. 3950/6353 cut-off events. For 2226578/2226578 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 40191 event pairs, 700 based on Foata normal form. 28/6380 useless extension candidates. Maximal degree in co-relation 111771. Up to 5754 conditions per place. [2024-06-27 21:35:35,511 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 621 selfloop transitions, 75 changer transitions 2/703 dead transitions. [2024-06-27 21:35:35,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 703 transitions, 20161 flow [2024-06-27 21:35:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:35:35,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 21:35:35,513 INFO L175 Difference]: Start difference. First operand has 413 places, 671 transitions, 18314 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:35:35,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 703 transitions, 20161 flow [2024-06-27 21:35:39,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 703 transitions, 20026 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:39,238 INFO L231 Difference]: Finished difference. Result has 414 places, 671 transitions, 18396 flow [2024-06-27 21:35:39,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18179, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18396, PETRI_PLACES=414, PETRI_TRANSITIONS=671} [2024-06-27 21:35:39,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-27 21:35:39,239 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 671 transitions, 18396 flow [2024-06-27 21:35:39,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:39,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:39,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:39,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:35:39,240 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:39,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2067244283, now seen corresponding path program 3 times [2024-06-27 21:35:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:39,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731169653] [2024-06-27 21:35:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:39,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:42,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:42,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731169653] [2024-06-27 21:35:42,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731169653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:42,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:42,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:42,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651215455] [2024-06-27 21:35:42,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:42,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:42,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:42,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:42,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 671 transitions, 18396 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:42,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:42,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:42,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:46,039 INFO L124 PetriNetUnfolderBase]: 4020/6497 cut-off events. [2024-06-27 21:35:46,039 INFO L125 PetriNetUnfolderBase]: For 2277146/2277146 co-relation queries the response was YES. [2024-06-27 21:35:46,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113827 conditions, 6497 events. 4020/6497 cut-off events. For 2277146/2277146 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 41686 event pairs, 706 based on Foata normal form. 28/6524 useless extension candidates. Maximal degree in co-relation 113636. Up to 5863 conditions per place. [2024-06-27 21:35:46,257 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 625 selfloop transitions, 61 changer transitions 18/709 dead transitions. [2024-06-27 21:35:46,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 709 transitions, 20543 flow [2024-06-27 21:35:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:35:46,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-27 21:35:46,259 INFO L175 Difference]: Start difference. First operand has 414 places, 671 transitions, 18396 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:35:46,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 709 transitions, 20543 flow [2024-06-27 21:35:49,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 709 transitions, 20383 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:49,740 INFO L231 Difference]: Finished difference. Result has 417 places, 669 transitions, 18393 flow [2024-06-27 21:35:49,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18236, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18393, PETRI_PLACES=417, PETRI_TRANSITIONS=669} [2024-06-27 21:35:49,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-27 21:35:49,740 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 669 transitions, 18393 flow [2024-06-27 21:35:49,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:49,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:49,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:49,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:35:49,741 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:49,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:49,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2067005273, now seen corresponding path program 4 times [2024-06-27 21:35:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:49,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850859535] [2024-06-27 21:35:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:49,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:52,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:52,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850859535] [2024-06-27 21:35:52,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850859535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:52,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:52,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147161088] [2024-06-27 21:35:52,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:52,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:52,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:52,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:52,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:53,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:53,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 669 transitions, 18393 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:53,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:53,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:53,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:56,610 INFO L124 PetriNetUnfolderBase]: 3912/6331 cut-off events. [2024-06-27 21:35:56,610 INFO L125 PetriNetUnfolderBase]: For 2293910/2293910 co-relation queries the response was YES. [2024-06-27 21:35:56,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110213 conditions, 6331 events. 3912/6331 cut-off events. For 2293910/2293910 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 40417 event pairs, 712 based on Foata normal form. 48/6378 useless extension candidates. Maximal degree in co-relation 110020. Up to 5680 conditions per place. [2024-06-27 21:35:56,720 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 620 selfloop transitions, 58 changer transitions 14/697 dead transitions. [2024-06-27 21:35:56,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 697 transitions, 20126 flow [2024-06-27 21:35:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:35:56,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-27 21:35:56,721 INFO L175 Difference]: Start difference. First operand has 417 places, 669 transitions, 18393 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:35:56,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 697 transitions, 20126 flow [2024-06-27 21:36:00,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 697 transitions, 19923 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:00,196 INFO L231 Difference]: Finished difference. Result has 418 places, 656 transitions, 17914 flow [2024-06-27 21:36:00,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18190, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17914, PETRI_PLACES=418, PETRI_TRANSITIONS=656} [2024-06-27 21:36:00,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-27 21:36:00,197 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 656 transitions, 17914 flow [2024-06-27 21:36:00,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:00,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:00,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:00,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:36:00,197 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:00,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash -857073061, now seen corresponding path program 4 times [2024-06-27 21:36:00,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:00,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893611226] [2024-06-27 21:36:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:00,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:03,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893611226] [2024-06-27 21:36:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893611226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:03,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:03,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:03,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399130608] [2024-06-27 21:36:03,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:03,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:03,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 656 transitions, 17914 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:03,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:03,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:03,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:06,519 INFO L124 PetriNetUnfolderBase]: 3817/6138 cut-off events. [2024-06-27 21:36:06,520 INFO L125 PetriNetUnfolderBase]: For 2060446/2060446 co-relation queries the response was YES.