./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix017_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix017_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix017_power.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix017_power.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:27:38,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:27:38,265 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:27:38,271 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:27:38,271 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:27:38,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:27:38,296 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:27:38,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:27:38,297 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:27:38,300 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:27:38,300 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:27:38,300 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:27:38,301 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:27:38,302 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:27:38,302 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:27:38,303 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:27:38,303 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:27:38,303 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:27:38,303 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:27:38,303 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:27:38,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:27:38,304 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:27:38,304 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:27:38,304 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:27:38,304 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:27:38,304 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:27:38,304 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:27:38,305 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:27:38,305 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:27:38,305 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:27:38,306 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:27:38,306 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:27:38,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:27:38,307 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:27:38,307 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:27:38,307 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:27:38,307 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:27:38,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:27:38,307 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:27:38,307 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:27:38,307 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:27:38,307 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:27:38,308 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:27:38,308 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:27:38,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:27:38,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:27:38,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:27:38,574 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:27:38,575 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:27:38,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix017_power.opt_rmo.opt.i [2024-06-21 16:27:39,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:27:39,850 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:27:39,851 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix017_power.opt_rmo.opt.i [2024-06-21 16:27:39,862 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7930c610c/2b26a5aaea31441ba55c0979c5c1d3b4/FLAGb9fa42a2f [2024-06-21 16:27:39,872 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7930c610c/2b26a5aaea31441ba55c0979c5c1d3b4 [2024-06-21 16:27:39,874 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:27:39,874 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:27:39,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix017_power.opt_rmo.opt.yml/witness.yml [2024-06-21 16:27:40,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:27:40,084 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:27:40,085 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:27:40,085 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:27:40,089 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:27:40,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:27:39" (1/2) ... [2024-06-21 16:27:40,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@298c5dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:40, skipping insertion in model container [2024-06-21 16:27:40,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:27:39" (1/2) ... [2024-06-21 16:27:40,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3eb32f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:40, skipping insertion in model container [2024-06-21 16:27:40,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:27:40" (2/2) ... [2024-06-21 16:27:40,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@298c5dff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40, skipping insertion in model container [2024-06-21 16:27:40,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:27:40" (2/2) ... [2024-06-21 16:27:40,094 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:27:40,212 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:27:40,213 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-21 16:27:40,214 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] (((((((((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-21 16:27:40,214 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-21 16:27:40,214 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || y$r_buff1_thd1 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0) [2024-06-21 16:27:40,214 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:27:40,215 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-21 16:27:40,253 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:27:40,539 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:27:40,551 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:27:40,671 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:27:40,705 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:27:40,706 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40 WrapperNode [2024-06-21 16:27:40,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:27:40,706 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:27:40,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:27:40,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:27:40,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,779 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 140 [2024-06-21 16:27:40,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:27:40,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:27:40,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:27:40,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:27:40,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,805 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,831 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:27:40,832 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,832 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,853 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:27:40,863 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:27:40,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:27:40,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:27:40,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (1/1) ... [2024-06-21 16:27:40,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:27:40,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:27:40,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:27:40,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:27:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:27:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:27:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:27:41,007 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:27:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:27:41,008 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:27:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:27:41,008 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:27:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:27:41,008 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:27:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:27:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:27:41,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:27:41,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:27:41,010 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:27:41,151 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:27:41,154 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:27:41,549 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:27:41,549 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:27:41,693 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:27:41,693 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:27:41,694 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:27:41 BoogieIcfgContainer [2024-06-21 16:27:41,694 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:27:41,696 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:27:41,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:27:41,698 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:27:41,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:27:39" (1/4) ... [2024-06-21 16:27:41,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b024c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:27:41, skipping insertion in model container [2024-06-21 16:27:41,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:27:40" (2/4) ... [2024-06-21 16:27:41,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b024c72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:27:41, skipping insertion in model container [2024-06-21 16:27:41,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:40" (3/4) ... [2024-06-21 16:27:41,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b024c72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:27:41, skipping insertion in model container [2024-06-21 16:27:41,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:27:41" (4/4) ... [2024-06-21 16:27:41,701 INFO L112 eAbstractionObserver]: Analyzing ICFG mix017_power.opt_rmo.opt.i [2024-06-21 16:27:41,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:27:41,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:27:41,714 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:27:41,775 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:27:41,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 16:27:41,829 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 16:27:41,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:27:41,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:27:41,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 16:27:41,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 16:27:41,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:27:41,853 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;@6a11f4aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:27:41,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:27:41,857 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:27:41,857 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:27:41,858 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:27:41,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:41,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:27:41,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:41,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash 392685785, now seen corresponding path program 1 times [2024-06-21 16:27:41,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:41,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653288843] [2024-06-21 16:27:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:42,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:42,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653288843] [2024-06-21 16:27:42,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653288843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:42,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:42,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:27:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383438236] [2024-06-21 16:27:42,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:27:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:42,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:27:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:27:42,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 16:27:42,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:42,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:42,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 16:27:42,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:43,723 INFO L124 PetriNetUnfolderBase]: 5292/7736 cut-off events. [2024-06-21 16:27:43,723 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-21 16:27:43,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15277 conditions, 7736 events. 5292/7736 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44828 event pairs, 3846 based on Foata normal form. 1/7478 useless extension candidates. Maximal degree in co-relation 15264. Up to 7274 conditions per place. [2024-06-21 16:27:43,763 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 40 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 16:27:43,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 223 flow [2024-06-21 16:27:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:27:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:27:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-21 16:27:43,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-21 16:27:43,773 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 103 transitions. [2024-06-21 16:27:43,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 223 flow [2024-06-21 16:27:43,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:27:43,777 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 16:27:43,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 16:27:43,781 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 16:27:43,781 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 16:27:43,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:43,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:43,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:43,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:27:43,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:43,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash -586052488, now seen corresponding path program 1 times [2024-06-21 16:27:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:43,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319356363] [2024-06-21 16:27:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:43,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319356363] [2024-06-21 16:27:44,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319356363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:44,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:44,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:27:44,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823955808] [2024-06-21 16:27:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:44,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:27:44,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:27:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:27:44,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-21 16:27:44,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:44,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:44,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-21 16:27:44,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:45,313 INFO L124 PetriNetUnfolderBase]: 6187/8777 cut-off events. [2024-06-21 16:27:45,314 INFO L125 PetriNetUnfolderBase]: For 1776/1776 co-relation queries the response was YES. [2024-06-21 16:27:45,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20004 conditions, 8777 events. 6187/8777 cut-off events. For 1776/1776 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 49408 event pairs, 3871 based on Foata normal form. 4/8776 useless extension candidates. Maximal degree in co-relation 19992. Up to 8444 conditions per place. [2024-06-21 16:27:45,352 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 51 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 16:27:45,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 317 flow [2024-06-21 16:27:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:27:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:27:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-21 16:27:45,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-21 16:27:45,355 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 132 transitions. [2024-06-21 16:27:45,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 317 flow [2024-06-21 16:27:45,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:27:45,356 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 16:27:45,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 16:27:45,357 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 16:27:45,357 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 16:27:45,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:45,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:45,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:45,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:27:45,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:45,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash -46613773, now seen corresponding path program 1 times [2024-06-21 16:27:45,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:45,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966587670] [2024-06-21 16:27:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:45,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:46,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:46,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966587670] [2024-06-21 16:27:46,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966587670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:46,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:46,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:27:46,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813825086] [2024-06-21 16:27:46,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:46,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:27:46,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:27:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:27:46,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 16:27:46,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:46,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:46,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 16:27:46,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:47,279 INFO L124 PetriNetUnfolderBase]: 7856/11057 cut-off events. [2024-06-21 16:27:47,279 INFO L125 PetriNetUnfolderBase]: For 6016/6016 co-relation queries the response was YES. [2024-06-21 16:27:47,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27975 conditions, 11057 events. 7856/11057 cut-off events. For 6016/6016 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 60974 event pairs, 3834 based on Foata normal form. 8/11057 useless extension candidates. Maximal degree in co-relation 27961. Up to 10612 conditions per place. [2024-06-21 16:27:47,337 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 69 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-21 16:27:47,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 482 flow [2024-06-21 16:27:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:27:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:27:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-21 16:27:47,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-21 16:27:47,339 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 185 transitions. [2024-06-21 16:27:47,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 482 flow [2024-06-21 16:27:47,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 454 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 16:27:47,342 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 16:27:47,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 16:27:47,343 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 16:27:47,343 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 16:27:47,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:47,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:47,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:47,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:27:47,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:47,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash -510695009, now seen corresponding path program 1 times [2024-06-21 16:27:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:47,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242243548] [2024-06-21 16:27:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:47,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:48,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:48,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242243548] [2024-06-21 16:27:48,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242243548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:48,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:48,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:27:48,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496120997] [2024-06-21 16:27:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:48,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:27:48,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:27:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:27:48,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:27:48,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:48,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:48,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:27:48,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:49,087 INFO L124 PetriNetUnfolderBase]: 6688/9741 cut-off events. [2024-06-21 16:27:49,087 INFO L125 PetriNetUnfolderBase]: For 9778/9778 co-relation queries the response was YES. [2024-06-21 16:27:49,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26933 conditions, 9741 events. 6688/9741 cut-off events. For 9778/9778 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 55685 event pairs, 3462 based on Foata normal form. 6/9600 useless extension candidates. Maximal degree in co-relation 26916. Up to 9117 conditions per place. [2024-06-21 16:27:49,136 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-21 16:27:49,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 447 flow [2024-06-21 16:27:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:27:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:27:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-21 16:27:49,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-06-21 16:27:49,137 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 136 transitions. [2024-06-21 16:27:49,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 447 flow [2024-06-21 16:27:49,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:27:49,143 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 264 flow [2024-06-21 16:27:49,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-21 16:27:49,144 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-21 16:27:49,144 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 264 flow [2024-06-21 16:27:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:49,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:49,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:27:49,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:49,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1112923072, now seen corresponding path program 1 times [2024-06-21 16:27:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379675739] [2024-06-21 16:27:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:49,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:49,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379675739] [2024-06-21 16:27:49,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379675739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:49,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:49,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:27:49,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043177202] [2024-06-21 16:27:49,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:49,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:27:49,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:27:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:27:50,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:50,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:50,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:50,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:50,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:51,464 INFO L124 PetriNetUnfolderBase]: 7882/11135 cut-off events. [2024-06-21 16:27:51,465 INFO L125 PetriNetUnfolderBase]: For 18001/18001 co-relation queries the response was YES. [2024-06-21 16:27:51,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33838 conditions, 11135 events. 7882/11135 cut-off events. For 18001/18001 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 61464 event pairs, 3908 based on Foata normal form. 6/11135 useless extension candidates. Maximal degree in co-relation 33819. Up to 10604 conditions per place. [2024-06-21 16:27:51,532 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 72 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-21 16:27:51,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 101 transitions, 612 flow [2024-06-21 16:27:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:27:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:27:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 16:27:51,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-21 16:27:51,534 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 264 flow. Second operand 6 states and 167 transitions. [2024-06-21 16:27:51,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 101 transitions, 612 flow [2024-06-21 16:27:51,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 583 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:27:51,540 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 352 flow [2024-06-21 16:27:51,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-21 16:27:51,540 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-21 16:27:51,541 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 352 flow [2024-06-21 16:27:51,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:51,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:51,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:51,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:27:51,541 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:51,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:51,542 INFO L85 PathProgramCache]: Analyzing trace with hash -578707360, now seen corresponding path program 2 times [2024-06-21 16:27:51,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:51,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633980956] [2024-06-21 16:27:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:51,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:52,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633980956] [2024-06-21 16:27:52,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633980956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:52,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:52,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:27:52,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409140104] [2024-06-21 16:27:52,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:52,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:27:52,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:27:52,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:27:52,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:52,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 352 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:52,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:52,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:52,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:53,533 INFO L124 PetriNetUnfolderBase]: 7864/11115 cut-off events. [2024-06-21 16:27:53,534 INFO L125 PetriNetUnfolderBase]: For 26496/26504 co-relation queries the response was YES. [2024-06-21 16:27:53,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36613 conditions, 11115 events. 7864/11115 cut-off events. For 26496/26504 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 61520 event pairs, 3904 based on Foata normal form. 12/11122 useless extension candidates. Maximal degree in co-relation 36593. Up to 10589 conditions per place. [2024-06-21 16:27:53,587 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 65 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-21 16:27:53,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 590 flow [2024-06-21 16:27:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:27:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:27:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 16:27:53,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-21 16:27:53,589 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 352 flow. Second operand 6 states and 160 transitions. [2024-06-21 16:27:53,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 590 flow [2024-06-21 16:27:53,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 544 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 16:27:53,603 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 359 flow [2024-06-21 16:27:53,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-21 16:27:53,604 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 16:27:53,604 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 359 flow [2024-06-21 16:27:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:53,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:53,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:53,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:27:53,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:53,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1904994256, now seen corresponding path program 1 times [2024-06-21 16:27:53,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:53,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489526242] [2024-06-21 16:27:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:53,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:54,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:54,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489526242] [2024-06-21 16:27:54,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489526242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:54,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:54,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:27:54,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846005960] [2024-06-21 16:27:54,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:54,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:27:54,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:54,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:27:54,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:27:54,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:54,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 359 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:54,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:54,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:54,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:55,824 INFO L124 PetriNetUnfolderBase]: 7977/11291 cut-off events. [2024-06-21 16:27:55,824 INFO L125 PetriNetUnfolderBase]: For 30625/30629 co-relation queries the response was YES. [2024-06-21 16:27:55,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37636 conditions, 11291 events. 7977/11291 cut-off events. For 30625/30629 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 62552 event pairs, 4108 based on Foata normal form. 10/11298 useless extension candidates. Maximal degree in co-relation 37614. Up to 10759 conditions per place. [2024-06-21 16:27:55,894 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 88 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-21 16:27:55,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 128 transitions, 822 flow [2024-06-21 16:27:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:27:55,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-21 16:27:55,895 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 359 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:27:55,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 128 transitions, 822 flow [2024-06-21 16:27:55,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 128 transitions, 748 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:27:55,916 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 511 flow [2024-06-21 16:27:55,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=511, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2024-06-21 16:27:55,917 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-21 16:27:55,917 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 511 flow [2024-06-21 16:27:55,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:55,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:55,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:27:55,918 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:55,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash -960430702, now seen corresponding path program 2 times [2024-06-21 16:27:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:55,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208047024] [2024-06-21 16:27:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:55,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:56,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:56,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208047024] [2024-06-21 16:27:56,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208047024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:56,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:56,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:27:56,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177349949] [2024-06-21 16:27:56,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:56,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:27:56,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:27:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:27:56,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:56,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 511 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:56,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:56,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:56,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:58,168 INFO L124 PetriNetUnfolderBase]: 8021/11368 cut-off events. [2024-06-21 16:27:58,169 INFO L125 PetriNetUnfolderBase]: For 41769/41777 co-relation queries the response was YES. [2024-06-21 16:27:58,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40962 conditions, 11368 events. 8021/11368 cut-off events. For 41769/41777 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63003 event pairs, 4014 based on Foata normal form. 14/11372 useless extension candidates. Maximal degree in co-relation 40938. Up to 10781 conditions per place. [2024-06-21 16:27:58,242 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 88 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-21 16:27:58,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 130 transitions, 927 flow [2024-06-21 16:27:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:27:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:27:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:27:58,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-21 16:27:58,244 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 511 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:27:58,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 130 transitions, 927 flow [2024-06-21 16:27:58,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 130 transitions, 869 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 16:27:58,267 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 588 flow [2024-06-21 16:27:58,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2024-06-21 16:27:58,268 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-21 16:27:58,268 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 588 flow [2024-06-21 16:27:58,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:58,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:58,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:58,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:27:58,269 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:58,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1345926288, now seen corresponding path program 3 times [2024-06-21 16:27:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:58,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633003000] [2024-06-21 16:27:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:59,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:59,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633003000] [2024-06-21 16:27:59,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633003000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:59,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:59,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:27:59,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125429000] [2024-06-21 16:27:59,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:59,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:27:59,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:27:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:27:59,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:59,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 91 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:59,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:59,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:59,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:00,641 INFO L124 PetriNetUnfolderBase]: 8065/11445 cut-off events. [2024-06-21 16:28:00,641 INFO L125 PetriNetUnfolderBase]: For 54762/54764 co-relation queries the response was YES. [2024-06-21 16:28:00,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44156 conditions, 11445 events. 8065/11445 cut-off events. For 54762/54764 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63460 event pairs, 3660 based on Foata normal form. 6/11445 useless extension candidates. Maximal degree in co-relation 44131. Up to 10650 conditions per place. [2024-06-21 16:28:00,697 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 81 selfloop transitions, 50 changer transitions 0/139 dead transitions. [2024-06-21 16:28:00,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 139 transitions, 1116 flow [2024-06-21 16:28:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:28:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:28:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 16:28:00,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 16:28:00,700 INFO L175 Difference]: Start difference. First operand has 78 places, 91 transitions, 588 flow. Second operand 7 states and 195 transitions. [2024-06-21 16:28:00,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 139 transitions, 1116 flow [2024-06-21 16:28:00,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 139 transitions, 997 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:00,725 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 694 flow [2024-06-21 16:28:00,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2024-06-21 16:28:00,726 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-21 16:28:00,726 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 694 flow [2024-06-21 16:28:00,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:00,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:00,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:00,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:28:00,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:00,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:00,727 INFO L85 PathProgramCache]: Analyzing trace with hash -747545332, now seen corresponding path program 4 times [2024-06-21 16:28:00,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:00,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283458868] [2024-06-21 16:28:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:00,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:01,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:01,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283458868] [2024-06-21 16:28:01,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283458868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:01,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:01,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:28:01,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460066197] [2024-06-21 16:28:01,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:01,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:28:01,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:01,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:28:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:28:01,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:01,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 694 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:01,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:01,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:01,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:03,070 INFO L124 PetriNetUnfolderBase]: 8047/11423 cut-off events. [2024-06-21 16:28:03,070 INFO L125 PetriNetUnfolderBase]: For 55666/55671 co-relation queries the response was YES. [2024-06-21 16:28:03,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44021 conditions, 11423 events. 8047/11423 cut-off events. For 55666/55671 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63347 event pairs, 3668 based on Foata normal form. 6/11417 useless extension candidates. Maximal degree in co-relation 43995. Up to 10635 conditions per place. [2024-06-21 16:28:03,140 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 75 selfloop transitions, 50 changer transitions 0/133 dead transitions. [2024-06-21 16:28:03,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 133 transitions, 1048 flow [2024-06-21 16:28:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:28:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:28:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:28:03,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-21 16:28:03,141 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 694 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:28:03,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 133 transitions, 1048 flow [2024-06-21 16:28:03,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 965 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 16:28:03,175 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 722 flow [2024-06-21 16:28:03,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=722, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-21 16:28:03,176 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-21 16:28:03,176 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 722 flow [2024-06-21 16:28:03,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:03,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:03,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:03,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:28:03,177 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:03,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1339250934, now seen corresponding path program 1 times [2024-06-21 16:28:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:03,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317644822] [2024-06-21 16:28:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:04,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:04,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317644822] [2024-06-21 16:28:04,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317644822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:04,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:04,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:28:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001694863] [2024-06-21 16:28:04,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:04,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:28:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:28:04,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:28:04,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:28:04,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 722 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:04,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:04,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:28:04,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:05,834 INFO L124 PetriNetUnfolderBase]: 6882/9982 cut-off events. [2024-06-21 16:28:05,834 INFO L125 PetriNetUnfolderBase]: For 53268/53270 co-relation queries the response was YES. [2024-06-21 16:28:05,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39309 conditions, 9982 events. 6882/9982 cut-off events. For 53268/53270 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 56800 event pairs, 3125 based on Foata normal form. 6/9871 useless extension candidates. Maximal degree in co-relation 39281. Up to 9354 conditions per place. [2024-06-21 16:28:05,894 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 112 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-06-21 16:28:05,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1145 flow [2024-06-21 16:28:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:28:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:28:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 16:28:05,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-21 16:28:05,896 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 722 flow. Second operand 7 states and 187 transitions. [2024-06-21 16:28:05,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1145 flow [2024-06-21 16:28:05,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 138 transitions, 1004 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:05,925 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 703 flow [2024-06-21 16:28:05,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-21 16:28:05,926 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 16:28:05,926 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 703 flow [2024-06-21 16:28:05,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:05,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:05,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:05,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:28:05,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:05,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1918396734, now seen corresponding path program 1 times [2024-06-21 16:28:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713836732] [2024-06-21 16:28:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:05,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:06,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:06,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713836732] [2024-06-21 16:28:06,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713836732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:06,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:06,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:28:06,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307639641] [2024-06-21 16:28:06,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:06,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:28:06,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:28:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:28:06,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 16:28:06,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 703 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:06,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:06,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 16:28:06,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:07,721 INFO L124 PetriNetUnfolderBase]: 6461/9936 cut-off events. [2024-06-21 16:28:07,721 INFO L125 PetriNetUnfolderBase]: For 61414/61431 co-relation queries the response was YES. [2024-06-21 16:28:07,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40291 conditions, 9936 events. 6461/9936 cut-off events. For 61414/61431 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61508 event pairs, 3176 based on Foata normal form. 17/9903 useless extension candidates. Maximal degree in co-relation 40261. Up to 8823 conditions per place. [2024-06-21 16:28:07,786 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 100 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2024-06-21 16:28:07,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 124 transitions, 1003 flow [2024-06-21 16:28:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:28:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:28:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 16:28:07,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 16:28:07,787 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 703 flow. Second operand 5 states and 135 transitions. [2024-06-21 16:28:07,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 124 transitions, 1003 flow [2024-06-21 16:28:07,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 943 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:07,827 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 716 flow [2024-06-21 16:28:07,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=716, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-21 16:28:07,828 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-21 16:28:07,828 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 716 flow [2024-06-21 16:28:07,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:07,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:07,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:28:07,829 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:07,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash 443992499, now seen corresponding path program 1 times [2024-06-21 16:28:07,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:07,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902717385] [2024-06-21 16:28:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:07,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:08,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:08,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902717385] [2024-06-21 16:28:08,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902717385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:08,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:08,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:08,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742891414] [2024-06-21 16:28:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:08,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:08,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:08,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:08,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:09,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 716 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:09,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:09,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:09,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:10,457 INFO L124 PetriNetUnfolderBase]: 8386/11988 cut-off events. [2024-06-21 16:28:10,457 INFO L125 PetriNetUnfolderBase]: For 95435/95443 co-relation queries the response was YES. [2024-06-21 16:28:10,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52994 conditions, 11988 events. 8386/11988 cut-off events. For 95435/95443 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 67882 event pairs, 3217 based on Foata normal form. 32/11996 useless extension candidates. Maximal degree in co-relation 52963. Up to 10819 conditions per place. [2024-06-21 16:28:10,537 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 130 selfloop transitions, 41 changer transitions 0/179 dead transitions. [2024-06-21 16:28:10,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 179 transitions, 1424 flow [2024-06-21 16:28:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-21 16:28:10,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-21 16:28:10,539 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 716 flow. Second operand 9 states and 247 transitions. [2024-06-21 16:28:10,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 179 transitions, 1424 flow [2024-06-21 16:28:10,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 179 transitions, 1381 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 16:28:10,599 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 844 flow [2024-06-21 16:28:10,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=844, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2024-06-21 16:28:10,600 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-21 16:28:10,600 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 844 flow [2024-06-21 16:28:10,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:10,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:10,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:10,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:28:10,601 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:10,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2053233573, now seen corresponding path program 2 times [2024-06-21 16:28:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114476665] [2024-06-21 16:28:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:10,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:11,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114476665] [2024-06-21 16:28:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114476665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:11,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:11,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080611683] [2024-06-21 16:28:11,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:11,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:11,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:11,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:11,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:11,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:11,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:13,239 INFO L124 PetriNetUnfolderBase]: 8317/11903 cut-off events. [2024-06-21 16:28:13,239 INFO L125 PetriNetUnfolderBase]: For 108659/108667 co-relation queries the response was YES. [2024-06-21 16:28:13,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54198 conditions, 11903 events. 8317/11903 cut-off events. For 108659/108667 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 67202 event pairs, 3779 based on Foata normal form. 38/11931 useless extension candidates. Maximal degree in co-relation 54166. Up to 11001 conditions per place. [2024-06-21 16:28:13,322 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 121 selfloop transitions, 36 changer transitions 0/165 dead transitions. [2024-06-21 16:28:13,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 165 transitions, 1338 flow [2024-06-21 16:28:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-21 16:28:13,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 16:28:13,324 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 844 flow. Second operand 8 states and 216 transitions. [2024-06-21 16:28:13,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 165 transitions, 1338 flow [2024-06-21 16:28:13,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 165 transitions, 1269 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:13,390 INFO L231 Difference]: Finished difference. Result has 96 places, 114 transitions, 859 flow [2024-06-21 16:28:13,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=859, PETRI_PLACES=96, PETRI_TRANSITIONS=114} [2024-06-21 16:28:13,390 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-21 16:28:13,390 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 114 transitions, 859 flow [2024-06-21 16:28:13,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:13,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:13,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:13,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:28:13,391 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:13,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2057702223, now seen corresponding path program 3 times [2024-06-21 16:28:13,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:13,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413880225] [2024-06-21 16:28:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:13,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:14,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:14,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413880225] [2024-06-21 16:28:14,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413880225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:14,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:14,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441536101] [2024-06-21 16:28:14,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:14,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:14,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 114 transitions, 859 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:14,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:14,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:14,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:16,042 INFO L124 PetriNetUnfolderBase]: 8481/12150 cut-off events. [2024-06-21 16:28:16,042 INFO L125 PetriNetUnfolderBase]: For 121136/121141 co-relation queries the response was YES. [2024-06-21 16:28:16,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56299 conditions, 12150 events. 8481/12150 cut-off events. For 121136/121141 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 68888 event pairs, 3517 based on Foata normal form. 30/12175 useless extension candidates. Maximal degree in co-relation 56265. Up to 11087 conditions per place. [2024-06-21 16:28:16,131 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 101 selfloop transitions, 55 changer transitions 0/164 dead transitions. [2024-06-21 16:28:16,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 164 transitions, 1377 flow [2024-06-21 16:28:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 16:28:16,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-21 16:28:16,132 INFO L175 Difference]: Start difference. First operand has 96 places, 114 transitions, 859 flow. Second operand 8 states and 220 transitions. [2024-06-21 16:28:16,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 164 transitions, 1377 flow [2024-06-21 16:28:16,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 164 transitions, 1295 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:28:16,219 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 943 flow [2024-06-21 16:28:16,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-21 16:28:16,220 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-21 16:28:16,220 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 943 flow [2024-06-21 16:28:16,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:16,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:16,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:16,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:28:16,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:16,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2057886921, now seen corresponding path program 1 times [2024-06-21 16:28:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:16,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656590639] [2024-06-21 16:28:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:17,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656590639] [2024-06-21 16:28:17,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656590639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:17,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:17,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:17,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625777175] [2024-06-21 16:28:17,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:17,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:17,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:17,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:17,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 943 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:17,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:17,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:17,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:19,013 INFO L124 PetriNetUnfolderBase]: 8517/12170 cut-off events. [2024-06-21 16:28:19,014 INFO L125 PetriNetUnfolderBase]: For 137563/137574 co-relation queries the response was YES. [2024-06-21 16:28:19,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58312 conditions, 12170 events. 8517/12170 cut-off events. For 137563/137574 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68798 event pairs, 3571 based on Foata normal form. 14/12177 useless extension candidates. Maximal degree in co-relation 58277. Up to 11497 conditions per place. [2024-06-21 16:28:19,097 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 125 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-21 16:28:19,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 168 transitions, 1492 flow [2024-06-21 16:28:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 16:28:19,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120192307692307 [2024-06-21 16:28:19,098 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 943 flow. Second operand 8 states and 213 transitions. [2024-06-21 16:28:19,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 168 transitions, 1492 flow [2024-06-21 16:28:19,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 168 transitions, 1362 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:19,191 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 986 flow [2024-06-21 16:28:19,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=986, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2024-06-21 16:28:19,199 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-21 16:28:19,199 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 986 flow [2024-06-21 16:28:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:19,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:19,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:19,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:28:19,199 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:19,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash 137555009, now seen corresponding path program 1 times [2024-06-21 16:28:19,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:19,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554687028] [2024-06-21 16:28:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:19,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:19,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:19,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554687028] [2024-06-21 16:28:19,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554687028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:19,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:19,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:28:19,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494031121] [2024-06-21 16:28:19,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:19,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:28:19,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:28:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:28:20,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:28:20,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 986 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:20,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:20,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:28:20,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:21,296 INFO L124 PetriNetUnfolderBase]: 8084/11736 cut-off events. [2024-06-21 16:28:21,297 INFO L125 PetriNetUnfolderBase]: For 154305/154325 co-relation queries the response was YES. [2024-06-21 16:28:21,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58785 conditions, 11736 events. 8084/11736 cut-off events. For 154305/154325 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 68490 event pairs, 3580 based on Foata normal form. 22/11726 useless extension candidates. Maximal degree in co-relation 58748. Up to 10941 conditions per place. [2024-06-21 16:28:21,394 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 107 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-21 16:28:21,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 150 transitions, 1376 flow [2024-06-21 16:28:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 16:28:21,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-21 16:28:21,395 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 986 flow. Second operand 6 states and 160 transitions. [2024-06-21 16:28:21,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 150 transitions, 1376 flow [2024-06-21 16:28:21,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 1266 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:21,475 INFO L231 Difference]: Finished difference. Result has 101 places, 127 transitions, 1001 flow [2024-06-21 16:28:21,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1001, PETRI_PLACES=101, PETRI_TRANSITIONS=127} [2024-06-21 16:28:21,476 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-21 16:28:21,476 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 127 transitions, 1001 flow [2024-06-21 16:28:21,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:21,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:21,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:28:21,476 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:21,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1233428113, now seen corresponding path program 4 times [2024-06-21 16:28:21,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:21,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569560931] [2024-06-21 16:28:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:21,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:22,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569560931] [2024-06-21 16:28:22,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569560931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:22,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:22,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984727501] [2024-06-21 16:28:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:22,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:22,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:22,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 127 transitions, 1001 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:22,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:22,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:22,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:24,279 INFO L124 PetriNetUnfolderBase]: 8611/12309 cut-off events. [2024-06-21 16:28:24,279 INFO L125 PetriNetUnfolderBase]: For 176862/176867 co-relation queries the response was YES. [2024-06-21 16:28:24,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63933 conditions, 12309 events. 8611/12309 cut-off events. For 176862/176867 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 69460 event pairs, 3461 based on Foata normal form. 30/12327 useless extension candidates. Maximal degree in co-relation 63895. Up to 11279 conditions per place. [2024-06-21 16:28:24,387 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 110 selfloop transitions, 57 changer transitions 0/175 dead transitions. [2024-06-21 16:28:24,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 175 transitions, 1555 flow [2024-06-21 16:28:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-21 16:28:24,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 16:28:24,388 INFO L175 Difference]: Start difference. First operand has 101 places, 127 transitions, 1001 flow. Second operand 8 states and 216 transitions. [2024-06-21 16:28:24,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 175 transitions, 1555 flow [2024-06-21 16:28:24,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 175 transitions, 1472 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:24,512 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1098 flow [2024-06-21 16:28:24,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-21 16:28:24,512 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-21 16:28:24,512 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1098 flow [2024-06-21 16:28:24,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:24,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:24,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:24,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:28:24,513 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:24,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:24,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1233612811, now seen corresponding path program 2 times [2024-06-21 16:28:24,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:24,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082307623] [2024-06-21 16:28:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:24,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:25,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082307623] [2024-06-21 16:28:25,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082307623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:25,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:25,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:25,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423567244] [2024-06-21 16:28:25,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:25,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:25,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:25,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1098 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:25,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:25,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:25,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:27,265 INFO L124 PetriNetUnfolderBase]: 8669/12428 cut-off events. [2024-06-21 16:28:27,265 INFO L125 PetriNetUnfolderBase]: For 196394/196412 co-relation queries the response was YES. [2024-06-21 16:28:27,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66322 conditions, 12428 events. 8669/12428 cut-off events. For 196394/196412 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 70502 event pairs, 3583 based on Foata normal form. 20/12441 useless extension candidates. Maximal degree in co-relation 66283. Up to 11712 conditions per place. [2024-06-21 16:28:27,364 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 132 selfloop transitions, 39 changer transitions 0/179 dead transitions. [2024-06-21 16:28:27,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 179 transitions, 1681 flow [2024-06-21 16:28:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 16:28:27,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048076923076923 [2024-06-21 16:28:27,366 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1098 flow. Second operand 8 states and 210 transitions. [2024-06-21 16:28:27,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 179 transitions, 1681 flow [2024-06-21 16:28:27,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 179 transitions, 1537 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:27,499 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1158 flow [2024-06-21 16:28:27,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1158, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-21 16:28:27,500 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-21 16:28:27,500 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1158 flow [2024-06-21 16:28:27,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:27,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:27,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:27,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:28:27,500 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:27,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1461513961, now seen corresponding path program 3 times [2024-06-21 16:28:27,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:27,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471252272] [2024-06-21 16:28:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:27,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:28,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:28,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471252272] [2024-06-21 16:28:28,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471252272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:28,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:28,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:28,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079145108] [2024-06-21 16:28:28,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:28,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:28,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:28,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1158 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:28,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:28,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:28,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:30,371 INFO L124 PetriNetUnfolderBase]: 8705/12464 cut-off events. [2024-06-21 16:28:30,371 INFO L125 PetriNetUnfolderBase]: For 217688/217706 co-relation queries the response was YES. [2024-06-21 16:28:30,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68852 conditions, 12464 events. 8705/12464 cut-off events. For 217688/217706 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 70605 event pairs, 3591 based on Foata normal form. 20/12477 useless extension candidates. Maximal degree in co-relation 68811. Up to 11764 conditions per place. [2024-06-21 16:28:30,447 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 134 selfloop transitions, 43 changer transitions 0/185 dead transitions. [2024-06-21 16:28:30,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 185 transitions, 1748 flow [2024-06-21 16:28:30,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 16:28:30,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024038461538461 [2024-06-21 16:28:30,449 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1158 flow. Second operand 8 states and 209 transitions. [2024-06-21 16:28:30,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 185 transitions, 1748 flow [2024-06-21 16:28:30,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 185 transitions, 1610 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:30,559 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1218 flow [2024-06-21 16:28:30,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1218, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2024-06-21 16:28:30,559 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-21 16:28:30,559 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1218 flow [2024-06-21 16:28:30,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:30,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:30,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:30,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:28:30,560 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:30,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1470084841, now seen corresponding path program 4 times [2024-06-21 16:28:30,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:30,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439298221] [2024-06-21 16:28:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:30,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:31,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:31,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439298221] [2024-06-21 16:28:31,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439298221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:31,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:31,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:31,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959571653] [2024-06-21 16:28:31,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:31,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:31,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:31,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:31,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:31,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1218 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:31,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:31,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:31,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:33,207 INFO L124 PetriNetUnfolderBase]: 8690/12443 cut-off events. [2024-06-21 16:28:33,208 INFO L125 PetriNetUnfolderBase]: For 239612/239630 co-relation queries the response was YES. [2024-06-21 16:28:33,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70560 conditions, 12443 events. 8690/12443 cut-off events. For 239612/239630 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 70556 event pairs, 3341 based on Foata normal form. 20/12456 useless extension candidates. Maximal degree in co-relation 70518. Up to 11615 conditions per place. [2024-06-21 16:28:33,298 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 127 selfloop transitions, 54 changer transitions 0/189 dead transitions. [2024-06-21 16:28:33,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 189 transitions, 1796 flow [2024-06-21 16:28:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 16:28:33,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048076923076923 [2024-06-21 16:28:33,301 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1218 flow. Second operand 8 states and 210 transitions. [2024-06-21 16:28:33,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 189 transitions, 1796 flow [2024-06-21 16:28:33,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 189 transitions, 1671 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:33,433 INFO L231 Difference]: Finished difference. Result has 115 places, 146 transitions, 1291 flow [2024-06-21 16:28:33,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1291, PETRI_PLACES=115, PETRI_TRANSITIONS=146} [2024-06-21 16:28:33,434 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-21 16:28:33,434 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 146 transitions, 1291 flow [2024-06-21 16:28:33,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:33,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:33,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:33,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:28:33,434 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:33,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1038319645, now seen corresponding path program 2 times [2024-06-21 16:28:33,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:33,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702203288] [2024-06-21 16:28:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:33,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:34,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702203288] [2024-06-21 16:28:34,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702203288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:34,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:34,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:28:34,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379332570] [2024-06-21 16:28:34,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:34,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:28:34,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:34,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:28:34,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:28:34,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:28:34,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 146 transitions, 1291 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:34,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:34,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:28:34,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:35,574 INFO L124 PetriNetUnfolderBase]: 8199/11908 cut-off events. [2024-06-21 16:28:35,575 INFO L125 PetriNetUnfolderBase]: For 257615/257630 co-relation queries the response was YES. [2024-06-21 16:28:35,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69052 conditions, 11908 events. 8199/11908 cut-off events. For 257615/257630 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 69353 event pairs, 3550 based on Foata normal form. 16/11882 useless extension candidates. Maximal degree in co-relation 69009. Up to 11085 conditions per place. [2024-06-21 16:28:35,672 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 113 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-21 16:28:35,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 168 transitions, 1707 flow [2024-06-21 16:28:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 16:28:35,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:28:35,673 INFO L175 Difference]: Start difference. First operand has 115 places, 146 transitions, 1291 flow. Second operand 6 states and 156 transitions. [2024-06-21 16:28:35,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 168 transitions, 1707 flow [2024-06-21 16:28:35,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 168 transitions, 1535 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:35,809 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1270 flow [2024-06-21 16:28:35,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1270, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-21 16:28:35,809 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-21 16:28:35,809 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1270 flow [2024-06-21 16:28:35,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:35,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:35,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:35,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:28:35,810 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:35,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:35,810 INFO L85 PathProgramCache]: Analyzing trace with hash 469868959, now seen corresponding path program 1 times [2024-06-21 16:28:35,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:35,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177314697] [2024-06-21 16:28:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:36,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:36,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177314697] [2024-06-21 16:28:36,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177314697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:36,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:36,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:28:36,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132838856] [2024-06-21 16:28:36,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:36,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:28:36,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:36,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:28:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:28:36,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:28:36,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1270 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:36,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:36,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:28:36,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:37,887 INFO L124 PetriNetUnfolderBase]: 7558/11106 cut-off events. [2024-06-21 16:28:37,887 INFO L125 PetriNetUnfolderBase]: For 241934/241936 co-relation queries the response was YES. [2024-06-21 16:28:37,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66136 conditions, 11106 events. 7558/11106 cut-off events. For 241934/241936 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 65075 event pairs, 2975 based on Foata normal form. 4/11048 useless extension candidates. Maximal degree in co-relation 66092. Up to 10381 conditions per place. [2024-06-21 16:28:37,974 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 153 selfloop transitions, 14 changer transitions 0/176 dead transitions. [2024-06-21 16:28:37,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 176 transitions, 1744 flow [2024-06-21 16:28:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 16:28:37,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-21 16:28:37,975 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1270 flow. Second operand 6 states and 158 transitions. [2024-06-21 16:28:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 176 transitions, 1744 flow [2024-06-21 16:28:38,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 1633 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:38,128 INFO L231 Difference]: Finished difference. Result has 117 places, 154 transitions, 1270 flow [2024-06-21 16:28:38,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1270, PETRI_PLACES=117, PETRI_TRANSITIONS=154} [2024-06-21 16:28:38,128 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-21 16:28:38,128 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 154 transitions, 1270 flow [2024-06-21 16:28:38,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:38,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:38,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:38,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:28:38,128 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:38,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1038325597, now seen corresponding path program 2 times [2024-06-21 16:28:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:38,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588463159] [2024-06-21 16:28:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:38,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:38,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588463159] [2024-06-21 16:28:38,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588463159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:38,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:38,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:28:38,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708496681] [2024-06-21 16:28:38,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:38,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:28:38,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:28:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:28:38,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:28:38,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 154 transitions, 1270 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:38,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:38,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:28:38,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:40,332 INFO L124 PetriNetUnfolderBase]: 7567/11195 cut-off events. [2024-06-21 16:28:40,333 INFO L125 PetriNetUnfolderBase]: For 259909/259916 co-relation queries the response was YES. [2024-06-21 16:28:40,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68448 conditions, 11195 events. 7567/11195 cut-off events. For 259909/259916 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 66276 event pairs, 2989 based on Foata normal form. 8/11146 useless extension candidates. Maximal degree in co-relation 68403. Up to 10366 conditions per place. [2024-06-21 16:28:40,426 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 148 selfloop transitions, 21 changer transitions 0/178 dead transitions. [2024-06-21 16:28:40,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 178 transitions, 1754 flow [2024-06-21 16:28:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 16:28:40,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-21 16:28:40,427 INFO L175 Difference]: Start difference. First operand has 117 places, 154 transitions, 1270 flow. Second operand 6 states and 158 transitions. [2024-06-21 16:28:40,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 178 transitions, 1754 flow [2024-06-21 16:28:40,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 178 transitions, 1673 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:40,598 INFO L231 Difference]: Finished difference. Result has 119 places, 158 transitions, 1322 flow [2024-06-21 16:28:40,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1322, PETRI_PLACES=119, PETRI_TRANSITIONS=158} [2024-06-21 16:28:40,598 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-21 16:28:40,598 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 158 transitions, 1322 flow [2024-06-21 16:28:40,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:40,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:40,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:40,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:28:40,598 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:40,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:40,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2092997303, now seen corresponding path program 1 times [2024-06-21 16:28:40,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:40,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826616667] [2024-06-21 16:28:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:40,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826616667] [2024-06-21 16:28:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826616667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:28:41,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838371001] [2024-06-21 16:28:41,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:28:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:28:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:28:41,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:28:41,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 158 transitions, 1322 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:41,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:41,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:28:41,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:43,327 INFO L124 PetriNetUnfolderBase]: 8542/12533 cut-off events. [2024-06-21 16:28:43,327 INFO L125 PetriNetUnfolderBase]: For 329574/329591 co-relation queries the response was YES. [2024-06-21 16:28:43,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78857 conditions, 12533 events. 8542/12533 cut-off events. For 329574/329591 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 74656 event pairs, 3638 based on Foata normal form. 17/12468 useless extension candidates. Maximal degree in co-relation 78811. Up to 11600 conditions per place. [2024-06-21 16:28:43,426 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 147 selfloop transitions, 17 changer transitions 0/184 dead transitions. [2024-06-21 16:28:43,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 184 transitions, 1801 flow [2024-06-21 16:28:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 16:28:43,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-21 16:28:43,427 INFO L175 Difference]: Start difference. First operand has 119 places, 158 transitions, 1322 flow. Second operand 6 states and 155 transitions. [2024-06-21 16:28:43,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 184 transitions, 1801 flow [2024-06-21 16:28:43,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 1693 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:43,640 INFO L231 Difference]: Finished difference. Result has 122 places, 166 transitions, 1370 flow [2024-06-21 16:28:43,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1370, PETRI_PLACES=122, PETRI_TRANSITIONS=166} [2024-06-21 16:28:43,641 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-21 16:28:43,641 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 166 transitions, 1370 flow [2024-06-21 16:28:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:43,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:43,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:28:43,641 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:43,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:43,641 INFO L85 PathProgramCache]: Analyzing trace with hash -630013465, now seen corresponding path program 1 times [2024-06-21 16:28:43,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:43,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405599] [2024-06-21 16:28:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:44,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:44,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405599] [2024-06-21 16:28:44,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:44,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:44,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:44,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82419610] [2024-06-21 16:28:44,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:44,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:44,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:44,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:45,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:45,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 166 transitions, 1370 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:45,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:45,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:45,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:47,056 INFO L124 PetriNetUnfolderBase]: 9986/14288 cut-off events. [2024-06-21 16:28:47,056 INFO L125 PetriNetUnfolderBase]: For 406240/406245 co-relation queries the response was YES. [2024-06-21 16:28:47,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94272 conditions, 14288 events. 9986/14288 cut-off events. For 406240/406245 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 82239 event pairs, 3916 based on Foata normal form. 18/14277 useless extension candidates. Maximal degree in co-relation 94224. Up to 12884 conditions per place. [2024-06-21 16:28:47,198 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 149 selfloop transitions, 79 changer transitions 0/237 dead transitions. [2024-06-21 16:28:47,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 237 transitions, 2237 flow [2024-06-21 16:28:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-21 16:28:47,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235042735042735 [2024-06-21 16:28:47,201 INFO L175 Difference]: Start difference. First operand has 122 places, 166 transitions, 1370 flow. Second operand 9 states and 245 transitions. [2024-06-21 16:28:47,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 237 transitions, 2237 flow [2024-06-21 16:28:47,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 237 transitions, 2158 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 16:28:47,451 INFO L231 Difference]: Finished difference. Result has 130 places, 182 transitions, 1713 flow [2024-06-21 16:28:47,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1713, PETRI_PLACES=130, PETRI_TRANSITIONS=182} [2024-06-21 16:28:47,451 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-21 16:28:47,451 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 182 transitions, 1713 flow [2024-06-21 16:28:47,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:47,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:47,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:47,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:28:47,452 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:47,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1324774679, now seen corresponding path program 2 times [2024-06-21 16:28:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:47,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989489302] [2024-06-21 16:28:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:48,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:48,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989489302] [2024-06-21 16:28:48,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989489302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:48,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:48,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:48,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073834073] [2024-06-21 16:28:48,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:48,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:48,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:48,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:48,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:48,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:48,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 182 transitions, 1713 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:48,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:48,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:48,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:50,902 INFO L124 PetriNetUnfolderBase]: 10228/14690 cut-off events. [2024-06-21 16:28:50,902 INFO L125 PetriNetUnfolderBase]: For 447894/447899 co-relation queries the response was YES. [2024-06-21 16:28:50,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99702 conditions, 14690 events. 10228/14690 cut-off events. For 447894/447899 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 85349 event pairs, 3970 based on Foata normal form. 18/14686 useless extension candidates. Maximal degree in co-relation 99651. Up to 13407 conditions per place. [2024-06-21 16:28:51,041 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 151 selfloop transitions, 86 changer transitions 0/246 dead transitions. [2024-06-21 16:28:51,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 246 transitions, 2550 flow [2024-06-21 16:28:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-21 16:28:51,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170940170940171 [2024-06-21 16:28:51,043 INFO L175 Difference]: Start difference. First operand has 130 places, 182 transitions, 1713 flow. Second operand 9 states and 242 transitions. [2024-06-21 16:28:51,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 246 transitions, 2550 flow [2024-06-21 16:28:51,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 246 transitions, 2366 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:51,322 INFO L231 Difference]: Finished difference. Result has 137 places, 194 transitions, 1932 flow [2024-06-21 16:28:51,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1932, PETRI_PLACES=137, PETRI_TRANSITIONS=194} [2024-06-21 16:28:51,322 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-21 16:28:51,322 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 194 transitions, 1932 flow [2024-06-21 16:28:51,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:51,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:51,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:51,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:28:51,323 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:51,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash -412707099, now seen corresponding path program 3 times [2024-06-21 16:28:51,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:51,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918641333] [2024-06-21 16:28:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:52,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918641333] [2024-06-21 16:28:52,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918641333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:52,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:52,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:52,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811829711] [2024-06-21 16:28:52,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:52,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:52,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:52,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:52,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 194 transitions, 1932 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:52,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:52,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:52,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:55,120 INFO L124 PetriNetUnfolderBase]: 10412/15002 cut-off events. [2024-06-21 16:28:55,121 INFO L125 PetriNetUnfolderBase]: For 484421/484426 co-relation queries the response was YES. [2024-06-21 16:28:55,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103117 conditions, 15002 events. 10412/15002 cut-off events. For 484421/484426 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 87612 event pairs, 4018 based on Foata normal form. 18/14998 useless extension candidates. Maximal degree in co-relation 103063. Up to 13687 conditions per place. [2024-06-21 16:28:55,262 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 157 selfloop transitions, 84 changer transitions 0/250 dead transitions. [2024-06-21 16:28:55,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 250 transitions, 2720 flow [2024-06-21 16:28:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-21 16:28:55,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 16:28:55,263 INFO L175 Difference]: Start difference. First operand has 137 places, 194 transitions, 1932 flow. Second operand 9 states and 243 transitions. [2024-06-21 16:28:55,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 250 transitions, 2720 flow [2024-06-21 16:28:55,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 250 transitions, 2563 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:28:55,869 INFO L231 Difference]: Finished difference. Result has 144 places, 198 transitions, 2086 flow [2024-06-21 16:28:55,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2086, PETRI_PLACES=144, PETRI_TRANSITIONS=198} [2024-06-21 16:28:55,870 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-21 16:28:55,870 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 198 transitions, 2086 flow [2024-06-21 16:28:55,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:55,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:55,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:55,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:28:55,871 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:55,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1672008761, now seen corresponding path program 4 times [2024-06-21 16:28:55,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:55,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343226055] [2024-06-21 16:28:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:55,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:56,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:56,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343226055] [2024-06-21 16:28:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343226055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:56,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:56,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149532824] [2024-06-21 16:28:56,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:56,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:56,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:56,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:57,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:57,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 198 transitions, 2086 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:57,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:57,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:57,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:59,463 INFO L124 PetriNetUnfolderBase]: 10373/14927 cut-off events. [2024-06-21 16:28:59,463 INFO L125 PetriNetUnfolderBase]: For 509091/509096 co-relation queries the response was YES. [2024-06-21 16:28:59,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102201 conditions, 14927 events. 10373/14927 cut-off events. For 509091/509096 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 86899 event pairs, 3680 based on Foata normal form. 18/14923 useless extension candidates. Maximal degree in co-relation 102145. Up to 12688 conditions per place. [2024-06-21 16:28:59,612 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 137 selfloop transitions, 106 changer transitions 0/252 dead transitions. [2024-06-21 16:28:59,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 252 transitions, 2806 flow [2024-06-21 16:28:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-21 16:28:59,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149572649572649 [2024-06-21 16:28:59,614 INFO L175 Difference]: Start difference. First operand has 144 places, 198 transitions, 2086 flow. Second operand 9 states and 241 transitions. [2024-06-21 16:28:59,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 252 transitions, 2806 flow [2024-06-21 16:28:59,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 252 transitions, 2548 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 16:28:59,932 INFO L231 Difference]: Finished difference. Result has 145 places, 199 transitions, 2095 flow [2024-06-21 16:28:59,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2095, PETRI_PLACES=145, PETRI_TRANSITIONS=199} [2024-06-21 16:28:59,932 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-21 16:28:59,932 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 199 transitions, 2095 flow [2024-06-21 16:28:59,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:59,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:59,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:59,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:28:59,933 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:59,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1680917001, now seen corresponding path program 1 times [2024-06-21 16:28:59,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:59,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551162036] [2024-06-21 16:28:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:59,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:00,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551162036] [2024-06-21 16:29:00,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551162036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:00,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:00,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:00,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824431426] [2024-06-21 16:29:00,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:00,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:00,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:00,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:00,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:29:00,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 199 transitions, 2095 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:00,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:00,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:29:00,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:02,837 INFO L124 PetriNetUnfolderBase]: 8974/13286 cut-off events. [2024-06-21 16:29:02,837 INFO L125 PetriNetUnfolderBase]: For 439662/439664 co-relation queries the response was YES. [2024-06-21 16:29:03,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90493 conditions, 13286 events. 8974/13286 cut-off events. For 439662/439664 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 80542 event pairs, 3288 based on Foata normal form. 2/13207 useless extension candidates. Maximal degree in co-relation 90438. Up to 12383 conditions per place. [2024-06-21 16:29:03,117 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 203 selfloop transitions, 18 changer transitions 0/231 dead transitions. [2024-06-21 16:29:03,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 231 transitions, 2719 flow [2024-06-21 16:29:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:29:03,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:29:03,118 INFO L175 Difference]: Start difference. First operand has 145 places, 199 transitions, 2095 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:29:03,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 231 transitions, 2719 flow [2024-06-21 16:29:03,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 231 transitions, 2442 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 16:29:03,441 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 1965 flow [2024-06-21 16:29:03,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1965, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-21 16:29:03,441 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-21 16:29:03,441 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 1965 flow [2024-06-21 16:29:03,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:03,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:03,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:03,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:29:03,442 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:03,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2123569829, now seen corresponding path program 1 times [2024-06-21 16:29:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828139250] [2024-06-21 16:29:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:03,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:04,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:04,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828139250] [2024-06-21 16:29:04,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828139250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:04,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:04,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:04,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715221949] [2024-06-21 16:29:04,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:04,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:04,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:04,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:04,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:29:04,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 1965 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:04,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:04,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:29:04,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:06,789 INFO L124 PetriNetUnfolderBase]: 9097/13408 cut-off events. [2024-06-21 16:29:06,790 INFO L125 PetriNetUnfolderBase]: For 515874/515891 co-relation queries the response was YES. [2024-06-21 16:29:06,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93199 conditions, 13408 events. 9097/13408 cut-off events. For 515874/515891 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 81026 event pairs, 3561 based on Foata normal form. 19/13297 useless extension candidates. Maximal degree in co-relation 93143. Up to 12473 conditions per place. [2024-06-21 16:29:06,919 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 192 selfloop transitions, 21 changer transitions 0/233 dead transitions. [2024-06-21 16:29:06,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 233 transitions, 2561 flow [2024-06-21 16:29:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 16:29:06,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 16:29:06,921 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 1965 flow. Second operand 8 states and 199 transitions. [2024-06-21 16:29:06,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 233 transitions, 2561 flow [2024-06-21 16:29:07,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 233 transitions, 2444 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 16:29:07,210 INFO L231 Difference]: Finished difference. Result has 148 places, 206 transitions, 1992 flow [2024-06-21 16:29:07,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1992, PETRI_PLACES=148, PETRI_TRANSITIONS=206} [2024-06-21 16:29:07,211 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-21 16:29:07,211 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 206 transitions, 1992 flow [2024-06-21 16:29:07,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:07,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:07,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:07,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:29:07,211 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:07,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1363842694, now seen corresponding path program 1 times [2024-06-21 16:29:07,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:07,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564597281] [2024-06-21 16:29:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:07,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:07,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:07,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564597281] [2024-06-21 16:29:07,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564597281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:07,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:07,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:29:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821945190] [2024-06-21 16:29:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:07,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:29:07,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:29:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:29:07,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:29:07,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 206 transitions, 1992 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:07,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:07,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:29:07,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:09,857 INFO L124 PetriNetUnfolderBase]: 10437/15105 cut-off events. [2024-06-21 16:29:09,857 INFO L125 PetriNetUnfolderBase]: For 624172/624189 co-relation queries the response was YES. [2024-06-21 16:29:09,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107944 conditions, 15105 events. 10437/15105 cut-off events. For 624172/624189 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 89252 event pairs, 4292 based on Foata normal form. 16/15048 useless extension candidates. Maximal degree in co-relation 107887. Up to 14265 conditions per place. [2024-06-21 16:29:09,989 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 192 selfloop transitions, 10 changer transitions 0/221 dead transitions. [2024-06-21 16:29:09,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 221 transitions, 2510 flow [2024-06-21 16:29:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:29:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:29:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 16:29:09,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-21 16:29:09,990 INFO L175 Difference]: Start difference. First operand has 148 places, 206 transitions, 1992 flow. Second operand 5 states and 122 transitions. [2024-06-21 16:29:09,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 221 transitions, 2510 flow [2024-06-21 16:29:10,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 221 transitions, 2378 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 16:29:10,354 INFO L231 Difference]: Finished difference. Result has 147 places, 210 transitions, 1975 flow [2024-06-21 16:29:10,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1975, PETRI_PLACES=147, PETRI_TRANSITIONS=210} [2024-06-21 16:29:10,355 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-21 16:29:10,355 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 210 transitions, 1975 flow [2024-06-21 16:29:10,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:10,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:10,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:10,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:29:10,355 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:10,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1005133188, now seen corresponding path program 1 times [2024-06-21 16:29:10,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:10,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960345494] [2024-06-21 16:29:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:10,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:11,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:11,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960345494] [2024-06-21 16:29:11,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960345494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:11,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:11,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:11,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039570378] [2024-06-21 16:29:11,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:11,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:11,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:11,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:11,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:11,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:29:11,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 210 transitions, 1975 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:11,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:11,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:29:11,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:13,692 INFO L124 PetriNetUnfolderBase]: 11402/16306 cut-off events. [2024-06-21 16:29:13,692 INFO L125 PetriNetUnfolderBase]: For 748687/748712 co-relation queries the response was YES. [2024-06-21 16:29:13,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123907 conditions, 16306 events. 11402/16306 cut-off events. For 748687/748712 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 95610 event pairs, 4338 based on Foata normal form. 16/16246 useless extension candidates. Maximal degree in co-relation 123849. Up to 15384 conditions per place. [2024-06-21 16:29:13,847 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 209 selfloop transitions, 29 changer transitions 0/248 dead transitions. [2024-06-21 16:29:13,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 248 transitions, 2667 flow [2024-06-21 16:29:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:29:13,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:29:13,848 INFO L175 Difference]: Start difference. First operand has 147 places, 210 transitions, 1975 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:29:13,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 248 transitions, 2667 flow [2024-06-21 16:29:14,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 248 transitions, 2580 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 16:29:14,165 INFO L231 Difference]: Finished difference. Result has 151 places, 214 transitions, 2061 flow [2024-06-21 16:29:14,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2061, PETRI_PLACES=151, PETRI_TRANSITIONS=214} [2024-06-21 16:29:14,165 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-21 16:29:14,165 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 214 transitions, 2061 flow [2024-06-21 16:29:14,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:14,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:14,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:14,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:29:14,166 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:14,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:14,166 INFO L85 PathProgramCache]: Analyzing trace with hash -999419268, now seen corresponding path program 2 times [2024-06-21 16:29:14,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:14,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161667489] [2024-06-21 16:29:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:15,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161667489] [2024-06-21 16:29:15,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161667489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:15,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:15,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:15,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750029370] [2024-06-21 16:29:15,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:15,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:15,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:15,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:29:15,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 214 transitions, 2061 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:15,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:15,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:29:15,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:17,734 INFO L124 PetriNetUnfolderBase]: 11480/16423 cut-off events. [2024-06-21 16:29:17,734 INFO L125 PetriNetUnfolderBase]: For 801953/801981 co-relation queries the response was YES. [2024-06-21 16:29:17,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128807 conditions, 16423 events. 11480/16423 cut-off events. For 801953/801981 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 96389 event pairs, 4340 based on Foata normal form. 16/16363 useless extension candidates. Maximal degree in co-relation 128748. Up to 15430 conditions per place. [2024-06-21 16:29:17,887 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 211 selfloop transitions, 38 changer transitions 0/259 dead transitions. [2024-06-21 16:29:17,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 259 transitions, 3031 flow [2024-06-21 16:29:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:29:17,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-21 16:29:17,888 INFO L175 Difference]: Start difference. First operand has 151 places, 214 transitions, 2061 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:29:17,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 259 transitions, 3031 flow [2024-06-21 16:29:18,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 259 transitions, 2902 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 16:29:18,328 INFO L231 Difference]: Finished difference. Result has 155 places, 225 transitions, 2274 flow [2024-06-21 16:29:18,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2274, PETRI_PLACES=155, PETRI_TRANSITIONS=225} [2024-06-21 16:29:18,328 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 100 predicate places. [2024-06-21 16:29:18,328 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 225 transitions, 2274 flow [2024-06-21 16:29:18,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:18,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:18,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:18,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:29:18,329 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:18,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:18,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1709915830, now seen corresponding path program 1 times [2024-06-21 16:29:18,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:18,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460493914] [2024-06-21 16:29:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:18,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:19,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460493914] [2024-06-21 16:29:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460493914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:19,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:19,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:19,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859713316] [2024-06-21 16:29:19,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:19,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:19,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:19,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:19,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:29:19,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 225 transitions, 2274 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:19,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:19,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:29:19,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:22,295 INFO L124 PetriNetUnfolderBase]: 11406/16322 cut-off events. [2024-06-21 16:29:22,295 INFO L125 PetriNetUnfolderBase]: For 882754/882771 co-relation queries the response was YES. [2024-06-21 16:29:22,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130960 conditions, 16322 events. 11406/16322 cut-off events. For 882754/882771 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 96092 event pairs, 4549 based on Foata normal form. 19/16203 useless extension candidates. Maximal degree in co-relation 130899. Up to 15220 conditions per place. [2024-06-21 16:29:22,444 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 202 selfloop transitions, 41 changer transitions 0/266 dead transitions. [2024-06-21 16:29:22,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 266 transitions, 2995 flow [2024-06-21 16:29:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 16:29:22,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-21 16:29:22,446 INFO L175 Difference]: Start difference. First operand has 155 places, 225 transitions, 2274 flow. Second operand 8 states and 198 transitions. [2024-06-21 16:29:22,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 266 transitions, 2995 flow [2024-06-21 16:29:23,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 266 transitions, 2855 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-21 16:29:23,048 INFO L231 Difference]: Finished difference. Result has 161 places, 235 transitions, 2386 flow [2024-06-21 16:29:23,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2386, PETRI_PLACES=161, PETRI_TRANSITIONS=235} [2024-06-21 16:29:23,049 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-06-21 16:29:23,049 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 235 transitions, 2386 flow [2024-06-21 16:29:23,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:23,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:23,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:23,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:29:23,049 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:23,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash 190976636, now seen corresponding path program 3 times [2024-06-21 16:29:23,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:23,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650036045] [2024-06-21 16:29:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:23,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:23,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650036045] [2024-06-21 16:29:23,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650036045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:23,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:23,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:23,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488312480] [2024-06-21 16:29:23,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:23,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:23,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:23,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:29:23,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 235 transitions, 2386 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:23,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:23,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:29:23,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand