./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix037.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/mix037.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/mix037.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix037.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 16:49:18,726 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:49:18,794 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:49:18,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:49:18,798 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:49:18,834 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:49:18,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:49:18,835 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:49:18,836 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:49:18,836 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:49:18,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:49:18,837 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:49:18,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:49:18,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:49:18,841 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:49:18,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:49:18,841 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:49:18,846 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:49:18,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:49:18,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:49:18,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:49:18,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:49:18,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:49:18,848 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:49:18,848 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:49:18,848 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:49:18,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:49:18,849 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:49:18,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:49:18,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:49:18,850 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:49:18,850 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:49:18,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:49:18,850 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:49:18,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:49:18,851 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:49:18,851 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:49:18,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:49:18,852 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:49:18,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:49:18,853 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:49:18,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:49:18,854 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:49:18,854 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:49:19,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:49:19,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:49:19,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:49:19,143 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:49:19,144 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:49:19,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix037.opt.yml/witness.yml [2024-06-21 16:49:19,424 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:49:19,424 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:49:19,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix037.opt.i [2024-06-21 16:49:20,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:49:20,846 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:49:20,846 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix037.opt.i [2024-06-21 16:49:20,863 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b00bb3d92/bc82efb78d5440f88dc7c59d9d2e22cd/FLAG75ac55390 [2024-06-21 16:49:20,874 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b00bb3d92/bc82efb78d5440f88dc7c59d9d2e22cd [2024-06-21 16:49:20,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:49:20,876 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:49:20,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:49:20,877 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:49:20,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:49:20,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:49:19" (1/2) ... [2024-06-21 16:49:20,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7a7479 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:49:20, skipping insertion in model container [2024-06-21 16:49:20,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:49:19" (1/2) ... [2024-06-21 16:49:20,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@72c8a4fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:49:20, skipping insertion in model container [2024-06-21 16:49:20,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:49:20" (2/2) ... [2024-06-21 16:49:20,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7a7479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:20, skipping insertion in model container [2024-06-21 16:49:20,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:49:20" (2/2) ... [2024-06-21 16:49:20,886 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:49:21,017 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:49:21,018 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-21 16:49:21,019 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-21 16:49:21,019 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-21 16:49:21,019 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-21 16:49:21,019 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:49:21,019 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-21 16:49:21,064 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:49:21,428 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:49:21,437 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 16:49:21,631 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:49:21,687 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:49:21,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21 WrapperNode [2024-06-21 16:49:21,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:49:21,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:49:21,689 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:49:21,689 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:49:21,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,767 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 146 [2024-06-21 16:49:21,768 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:49:21,769 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:49:21,769 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:49:21,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:49:21,782 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,786 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,803 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 16:49:21,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,843 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:49:21,849 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:49:21,850 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:49:21,850 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:49:21,850 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (1/1) ... [2024-06-21 16:49:21,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:49:21,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:49:21,877 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 16:49:21,900 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 16:49:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:49:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:49:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:49:21,915 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:49:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:49:21,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:49:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:49:21,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:49:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:49:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:49:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:49:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:49:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:49:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:49:21,919 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 16:49:22,085 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:49:22,087 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:49:22,424 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:49:22,425 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:49:22,617 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:49:22,617 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:49:22,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:49:22 BoogieIcfgContainer [2024-06-21 16:49:22,618 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:49:22,619 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:49:22,619 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:49:22,627 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:49:22,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:49:19" (1/4) ... [2024-06-21 16:49:22,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2014333b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:49:22, skipping insertion in model container [2024-06-21 16:49:22,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:49:20" (2/4) ... [2024-06-21 16:49:22,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2014333b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:49:22, skipping insertion in model container [2024-06-21 16:49:22,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:49:21" (3/4) ... [2024-06-21 16:49:22,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2014333b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:49:22, skipping insertion in model container [2024-06-21 16:49:22,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:49:22" (4/4) ... [2024-06-21 16:49:22,631 INFO L112 eAbstractionObserver]: Analyzing ICFG mix037.opt.i [2024-06-21 16:49:22,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:49:22,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:49:22,658 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:49:22,705 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:49:22,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:49:22,766 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 16:49:22,766 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:49:22,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:49:22,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:49:22,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 16:49:22,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:49:22,792 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;@3231e990, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:49:22,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:49:22,800 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:49:22,800 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:49:22,800 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:49:22,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:22,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:49:22,802 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 16:49:22,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash 384691786, now seen corresponding path program 1 times [2024-06-21 16:49:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:22,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758505428] [2024-06-21 16:49:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:23,957 INFO 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 16:49:23,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:23,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758505428] [2024-06-21 16:49:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758505428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:23,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:23,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:49:23,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420780450] [2024-06-21 16:49:23,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:23,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:49:23,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:23,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:49:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:49:24,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-21 16:49:24,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 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 16:49:24,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:24,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-21 16:49:24,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:25,307 INFO L124 PetriNetUnfolderBase]: 6201/8973 cut-off events. [2024-06-21 16:49:25,308 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-21 16:49:25,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17729 conditions, 8973 events. 6201/8973 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 52004 event pairs, 4673 based on Foata normal form. 1/8645 useless extension candidates. Maximal degree in co-relation 17716. Up to 8487 conditions per place. [2024-06-21 16:49:25,368 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 16:49:25,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-21 16:49:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:49:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:49:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-21 16:49:25,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540880503144654 [2024-06-21 16:49:25,382 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 104 transitions. [2024-06-21 16:49:25,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-21 16:49:25,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:25,390 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 16:49:25,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 16:49:25,394 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 16:49:25,395 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 16:49:25,395 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 16:49:25,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:25,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:25,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:49:25,396 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 16:49:25,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash 323025033, now seen corresponding path program 1 times [2024-06-21 16:49:25,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341795808] [2024-06-21 16:49:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:26,055 INFO 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 16:49:26,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:26,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341795808] [2024-06-21 16:49:26,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341795808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:26,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:26,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:49:26,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386885700] [2024-06-21 16:49:26,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:26,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:49:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:49:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:49:26,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 16:49:26,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 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 16:49:26,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:26,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 16:49:26,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:27,346 INFO L124 PetriNetUnfolderBase]: 7096/10020 cut-off events. [2024-06-21 16:49:27,346 INFO L125 PetriNetUnfolderBase]: For 1992/1992 co-relation queries the response was YES. [2024-06-21 16:49:27,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22758 conditions, 10020 events. 7096/10020 cut-off events. For 1992/1992 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 56678 event pairs, 4749 based on Foata normal form. 4/9846 useless extension candidates. Maximal degree in co-relation 22746. Up to 9657 conditions per place. [2024-06-21 16:49:27,403 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 16:49:27,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-21 16:49:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:49:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:49:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-21 16:49:27,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-21 16:49:27,406 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-21 16:49:27,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-21 16:49:27,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:49:27,408 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 16:49:27,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 16:49:27,409 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 16:49:27,410 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 16:49:27,410 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 16:49:27,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:27,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:27,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:49:27,411 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 16:49:27,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1423842189, now seen corresponding path program 1 times [2024-06-21 16:49:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:27,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599889212] [2024-06-21 16:49:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:28,205 INFO 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 16:49:28,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:28,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599889212] [2024-06-21 16:49:28,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599889212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:28,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:28,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:49:28,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326027639] [2024-06-21 16:49:28,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:28,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:49:28,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:28,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:49:28,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:49:28,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 16:49:28,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:28,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:28,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 16:49:28,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:29,420 INFO L124 PetriNetUnfolderBase]: 7114/10099 cut-off events. [2024-06-21 16:49:29,421 INFO L125 PetriNetUnfolderBase]: For 5738/5738 co-relation queries the response was YES. [2024-06-21 16:49:29,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25645 conditions, 10099 events. 7114/10099 cut-off events. For 5738/5738 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 57563 event pairs, 3563 based on Foata normal form. 7/9970 useless extension candidates. Maximal degree in co-relation 25631. Up to 9578 conditions per place. [2024-06-21 16:49:29,481 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-21 16:49:29,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 537 flow [2024-06-21 16:49:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:49:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:49:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-06-21 16:49:29,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6566037735849056 [2024-06-21 16:49:29,487 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 174 transitions. [2024-06-21 16:49:29,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 537 flow [2024-06-21 16:49:29,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 16:49:29,494 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-21 16:49:29,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 16:49:29,495 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 16:49:29,495 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-21 16:49:29,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:29,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:29,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:29,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:49:29,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:49:29,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:29,497 INFO L85 PathProgramCache]: Analyzing trace with hash -58502996, now seen corresponding path program 1 times [2024-06-21 16:49:29,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:29,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307870780] [2024-06-21 16:49:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:29,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:30,409 INFO 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 16:49:30,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:30,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307870780] [2024-06-21 16:49:30,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307870780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:30,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:30,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:49:30,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597838373] [2024-06-21 16:49:30,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:30,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:49:30,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:49:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:49:30,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 16:49:30,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:30,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:30,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 16:49:30,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:31,636 INFO L124 PetriNetUnfolderBase]: 7256/10319 cut-off events. [2024-06-21 16:49:31,636 INFO L125 PetriNetUnfolderBase]: For 14087/14106 co-relation queries the response was YES. [2024-06-21 16:49:31,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30929 conditions, 10319 events. 7256/10319 cut-off events. For 14087/14106 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59123 event pairs, 2792 based on Foata normal form. 48/10229 useless extension candidates. Maximal degree in co-relation 30912. Up to 9570 conditions per place. [2024-06-21 16:49:31,707 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-21 16:49:31,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 114 transitions, 692 flow [2024-06-21 16:49:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:49:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:49:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-21 16:49:31,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-21 16:49:31,709 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 204 transitions. [2024-06-21 16:49:31,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 114 transitions, 692 flow [2024-06-21 16:49:31,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 16:49:31,721 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 381 flow [2024-06-21 16:49:31,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-21 16:49:31,723 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-21 16:49:31,723 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 381 flow [2024-06-21 16:49:31,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:31,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:31,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:31,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:49:31,724 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 16:49:31,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash -288337099, now seen corresponding path program 1 times [2024-06-21 16:49:31,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:31,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644163269] [2024-06-21 16:49:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:31,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:32,575 INFO 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 16:49:32,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644163269] [2024-06-21 16:49:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644163269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:32,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:32,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:49:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261419806] [2024-06-21 16:49:32,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:32,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:49:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:49:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:49:32,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:49:32,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:32,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:32,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:49:32,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:33,755 INFO L124 PetriNetUnfolderBase]: 6342/9264 cut-off events. [2024-06-21 16:49:33,755 INFO L125 PetriNetUnfolderBase]: For 17897/17919 co-relation queries the response was YES. [2024-06-21 16:49:33,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29773 conditions, 9264 events. 6342/9264 cut-off events. For 17897/17919 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 54553 event pairs, 2937 based on Foata normal form. 3/9108 useless extension candidates. Maximal degree in co-relation 29752. Up to 8693 conditions per place. [2024-06-21 16:49:33,811 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 64 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-21 16:49:33,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 573 flow [2024-06-21 16:49:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:49:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:49:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 16:49:33,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 16:49:33,815 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 381 flow. Second operand 5 states and 140 transitions. [2024-06-21 16:49:33,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 573 flow [2024-06-21 16:49:33,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 512 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:33,826 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 351 flow [2024-06-21 16:49:33,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-21 16:49:33,833 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-21 16:49:33,833 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 351 flow [2024-06-21 16:49:33,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:33,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:33,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:33,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:49:33,834 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 16:49:33,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1534100530, now seen corresponding path program 1 times [2024-06-21 16:49:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516601006] [2024-06-21 16:49:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:33,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:34,807 INFO 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 16:49:34,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516601006] [2024-06-21 16:49:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516601006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:34,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:49:34,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924043828] [2024-06-21 16:49:34,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:34,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:49:34,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:34,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:49:34,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:49:34,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:49:34,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:34,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:34,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:49:34,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:36,129 INFO L124 PetriNetUnfolderBase]: 7260/10309 cut-off events. [2024-06-21 16:49:36,130 INFO L125 PetriNetUnfolderBase]: For 23865/23885 co-relation queries the response was YES. [2024-06-21 16:49:36,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33764 conditions, 10309 events. 7260/10309 cut-off events. For 23865/23885 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 58831 event pairs, 3413 based on Foata normal form. 24/10192 useless extension candidates. Maximal degree in co-relation 33741. Up to 9800 conditions per place. [2024-06-21 16:49:36,193 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 67 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-21 16:49:36,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 672 flow [2024-06-21 16:49:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:49:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:49:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-21 16:49:36,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2024-06-21 16:49:36,195 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 351 flow. Second operand 6 states and 172 transitions. [2024-06-21 16:49:36,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 672 flow [2024-06-21 16:49:36,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 643 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:36,205 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 418 flow [2024-06-21 16:49:36,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-21 16:49:36,208 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-21 16:49:36,209 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 418 flow [2024-06-21 16:49:36,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:36,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:36,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:36,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:49:36,209 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 16:49:36,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1547194930, now seen corresponding path program 2 times [2024-06-21 16:49:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:36,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150732088] [2024-06-21 16:49:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:37,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150732088] [2024-06-21 16:49:37,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150732088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:37,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:37,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:49:37,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863267517] [2024-06-21 16:49:37,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:37,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:49:37,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:49:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:49:37,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:49:37,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:37,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:37,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:49:37,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:38,265 INFO L124 PetriNetUnfolderBase]: 7215/10236 cut-off events. [2024-06-21 16:49:38,265 INFO L125 PetriNetUnfolderBase]: For 28438/28460 co-relation queries the response was YES. [2024-06-21 16:49:38,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34450 conditions, 10236 events. 7215/10236 cut-off events. For 28438/28460 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 58308 event pairs, 3427 based on Foata normal form. 23/10112 useless extension candidates. Maximal degree in co-relation 34427. Up to 9731 conditions per place. [2024-06-21 16:49:38,322 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 60 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-21 16:49:38,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 652 flow [2024-06-21 16:49:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:49:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:49:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 16:49:38,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-21 16:49:38,324 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 418 flow. Second operand 6 states and 167 transitions. [2024-06-21 16:49:38,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 652 flow [2024-06-21 16:49:38,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 609 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:49:38,338 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 438 flow [2024-06-21 16:49:38,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-21 16:49:38,340 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-21 16:49:38,340 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 438 flow [2024-06-21 16:49:38,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:38,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:38,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:38,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:49:38,341 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 16:49:38,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash 530386024, now seen corresponding path program 1 times [2024-06-21 16:49:38,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:38,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106637476] [2024-06-21 16:49:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:38,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:39,315 INFO 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 16:49:39,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:39,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106637476] [2024-06-21 16:49:39,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106637476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:39,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:39,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:49:39,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925993881] [2024-06-21 16:49:39,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:39,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:49:39,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:39,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:49:39,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:49:39,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:49:39,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 438 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 16:49:39,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:39,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:49:39,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:40,630 INFO L124 PetriNetUnfolderBase]: 8039/11515 cut-off events. [2024-06-21 16:49:40,630 INFO L125 PetriNetUnfolderBase]: For 35336/35336 co-relation queries the response was YES. [2024-06-21 16:49:40,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38740 conditions, 11515 events. 8039/11515 cut-off events. For 35336/35336 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 65910 event pairs, 3744 based on Foata normal form. 6/11378 useless extension candidates. Maximal degree in co-relation 38716. Up to 10907 conditions per place. [2024-06-21 16:49:40,710 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 84 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-21 16:49:40,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 777 flow [2024-06-21 16:49:40,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:49:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:49:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:49:40,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-21 16:49:40,712 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 438 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:49:40,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 777 flow [2024-06-21 16:49:40,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 686 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:40,744 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 459 flow [2024-06-21 16:49:40,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-21 16:49:40,745 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-21 16:49:40,745 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 459 flow [2024-06-21 16:49:40,746 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 16:49:40,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:40,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:40,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:49:40,746 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:49:40,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash -165796894, now seen corresponding path program 1 times [2024-06-21 16:49:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:40,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748273505] [2024-06-21 16:49:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:40,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:41,413 INFO 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 16:49:41,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748273505] [2024-06-21 16:49:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748273505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:41,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:41,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:49:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513832907] [2024-06-21 16:49:41,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:41,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:49:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:49:41,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:49:41,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:49:41,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:41,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:41,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:49:41,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:42,582 INFO L124 PetriNetUnfolderBase]: 8025/11897 cut-off events. [2024-06-21 16:49:42,582 INFO L125 PetriNetUnfolderBase]: For 44827/44827 co-relation queries the response was YES. [2024-06-21 16:49:42,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41593 conditions, 11897 events. 8025/11897 cut-off events. For 44827/44827 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 71432 event pairs, 3811 based on Foata normal form. 4/11883 useless extension candidates. Maximal degree in co-relation 41567. Up to 10931 conditions per place. [2024-06-21 16:49:42,695 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 78 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-06-21 16:49:42,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 97 transitions, 705 flow [2024-06-21 16:49:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:49:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:49:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 16:49:42,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-21 16:49:42,698 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 459 flow. Second operand 5 states and 133 transitions. [2024-06-21 16:49:42,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 97 transitions, 705 flow [2024-06-21 16:49:42,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 657 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:42,723 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 480 flow [2024-06-21 16:49:42,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-21 16:49:42,724 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-21 16:49:42,724 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 480 flow [2024-06-21 16:49:42,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:42,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:42,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:49:42,724 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 16:49:42,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash -475204019, now seen corresponding path program 1 times [2024-06-21 16:49:42,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:42,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843005011] [2024-06-21 16:49:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:43,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:43,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843005011] [2024-06-21 16:49:43,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843005011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:43,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:43,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:49:43,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726926966] [2024-06-21 16:49:43,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:43,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:49:43,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:49:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:49:43,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:49:43,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 480 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:43,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:43,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:49:43,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:45,203 INFO L124 PetriNetUnfolderBase]: 9156/13036 cut-off events. [2024-06-21 16:49:45,204 INFO L125 PetriNetUnfolderBase]: For 68131/68223 co-relation queries the response was YES. [2024-06-21 16:49:45,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49987 conditions, 13036 events. 9156/13036 cut-off events. For 68131/68223 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 76012 event pairs, 3617 based on Foata normal form. 54/13034 useless extension candidates. Maximal degree in co-relation 49960. Up to 11790 conditions per place. [2024-06-21 16:49:45,277 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 89 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-21 16:49:45,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 946 flow [2024-06-21 16:49:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:49:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:49:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 16:49:45,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444743935309974 [2024-06-21 16:49:45,279 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 480 flow. Second operand 7 states and 202 transitions. [2024-06-21 16:49:45,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 946 flow [2024-06-21 16:49:45,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 907 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 16:49:45,300 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 570 flow [2024-06-21 16:49:45,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=570, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-21 16:49:45,301 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-21 16:49:45,301 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 570 flow [2024-06-21 16:49:45,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:45,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:45,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:45,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:49:45,302 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 16:49:45,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -176754035, now seen corresponding path program 2 times [2024-06-21 16:49:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:45,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205189979] [2024-06-21 16:49:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:46,236 INFO 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 16:49:46,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:46,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205189979] [2024-06-21 16:49:46,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205189979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:46,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:46,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:49:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926146384] [2024-06-21 16:49:46,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:49:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:49:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:49:46,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:49:46,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 570 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:46,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:46,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:49:46,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:48,096 INFO L124 PetriNetUnfolderBase]: 9269/13227 cut-off events. [2024-06-21 16:49:48,096 INFO L125 PetriNetUnfolderBase]: For 82762/82854 co-relation queries the response was YES. [2024-06-21 16:49:48,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52791 conditions, 13227 events. 9269/13227 cut-off events. For 82762/82854 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 77504 event pairs, 4154 based on Foata normal form. 87/13257 useless extension candidates. Maximal degree in co-relation 52763. Up to 12362 conditions per place. [2024-06-21 16:49:48,188 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 86 selfloop transitions, 31 changer transitions 0/127 dead transitions. [2024-06-21 16:49:48,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 940 flow [2024-06-21 16:49:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:49:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:49:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 16:49:48,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-21 16:49:48,190 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 570 flow. Second operand 7 states and 198 transitions. [2024-06-21 16:49:48,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 940 flow [2024-06-21 16:49:48,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 893 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 16:49:48,233 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 638 flow [2024-06-21 16:49:48,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-21 16:49:48,234 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-21 16:49:48,234 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 638 flow [2024-06-21 16:49:48,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:48,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:48,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:48,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:49:48,234 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 16:49:48,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:48,235 INFO L85 PathProgramCache]: Analyzing trace with hash -428406719, now seen corresponding path program 1 times [2024-06-21 16:49:48,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:48,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569750358] [2024-06-21 16:49:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:49,220 INFO 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 16:49:49,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:49,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569750358] [2024-06-21 16:49:49,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569750358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:49,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:49,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:49:49,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3656894] [2024-06-21 16:49:49,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:49,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:49:49,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:49,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:49:49,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:49:49,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:49:49,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 638 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:49,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:49,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:49:49,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:50,803 INFO L124 PetriNetUnfolderBase]: 9615/13642 cut-off events. [2024-06-21 16:49:50,803 INFO L125 PetriNetUnfolderBase]: For 94229/94229 co-relation queries the response was YES. [2024-06-21 16:49:50,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56308 conditions, 13642 events. 9615/13642 cut-off events. For 94229/94229 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 77220 event pairs, 4323 based on Foata normal form. 4/13611 useless extension candidates. Maximal degree in co-relation 56278. Up to 13042 conditions per place. [2024-06-21 16:49:50,890 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 97 selfloop transitions, 21 changer transitions 0/126 dead transitions. [2024-06-21 16:49:50,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1070 flow [2024-06-21 16:49:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:49:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:49:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 16:49:50,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-21 16:49:50,892 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 638 flow. Second operand 6 states and 163 transitions. [2024-06-21 16:49:50,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1070 flow [2024-06-21 16:49:50,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 991 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:49:50,958 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 698 flow [2024-06-21 16:49:50,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-21 16:49:50,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-21 16:49:50,959 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 698 flow [2024-06-21 16:49:50,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:50,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:50,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:50,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:49:50,960 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 16:49:50,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash 427222243, now seen corresponding path program 1 times [2024-06-21 16:49:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:50,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660312781] [2024-06-21 16:49:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:50,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:52,057 INFO 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 16:49:52,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:52,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660312781] [2024-06-21 16:49:52,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660312781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:52,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:52,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:52,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628022288] [2024-06-21 16:49:52,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:52,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:52,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:52,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:52,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:52,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:49:52,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 698 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 16:49:52,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:52,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:49:52,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:53,842 INFO L124 PetriNetUnfolderBase]: 9673/13720 cut-off events. [2024-06-21 16:49:53,843 INFO L125 PetriNetUnfolderBase]: For 112207/112207 co-relation queries the response was YES. [2024-06-21 16:49:53,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59296 conditions, 13720 events. 9673/13720 cut-off events. For 112207/112207 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 77774 event pairs, 4116 based on Foata normal form. 6/13683 useless extension candidates. Maximal degree in co-relation 59265. Up to 12941 conditions per place. [2024-06-21 16:49:53,925 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 100 selfloop transitions, 44 changer transitions 0/152 dead transitions. [2024-06-21 16:49:53,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1217 flow [2024-06-21 16:49:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:53,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 16:49:53,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-21 16:49:53,930 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 698 flow. Second operand 8 states and 215 transitions. [2024-06-21 16:49:53,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1217 flow [2024-06-21 16:49:53,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 152 transitions, 1175 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 16:49:54,000 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 903 flow [2024-06-21 16:49:54,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-21 16:49:54,001 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-21 16:49:54,001 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 903 flow [2024-06-21 16:49:54,001 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 16:49:54,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:54,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:54,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:49:54,002 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 16:49:54,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:54,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1636579287, now seen corresponding path program 2 times [2024-06-21 16:49:54,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:54,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150405479] [2024-06-21 16:49:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:54,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:55,188 INFO 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 16:49:55,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:55,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150405479] [2024-06-21 16:49:55,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150405479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:55,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005087820] [2024-06-21 16:49:55,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:55,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:55,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:55,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:55,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:55,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:49:55,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 903 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 16:49:55,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:55,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:49:55,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:56,939 INFO L124 PetriNetUnfolderBase]: 9658/13703 cut-off events. [2024-06-21 16:49:56,940 INFO L125 PetriNetUnfolderBase]: For 128595/128595 co-relation queries the response was YES. [2024-06-21 16:49:56,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61771 conditions, 13703 events. 9658/13703 cut-off events. For 128595/128595 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 77678 event pairs, 4113 based on Foata normal form. 6/13667 useless extension candidates. Maximal degree in co-relation 61737. Up to 12920 conditions per place. [2024-06-21 16:49:57,037 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 104 selfloop transitions, 44 changer transitions 0/156 dead transitions. [2024-06-21 16:49:57,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1362 flow [2024-06-21 16:49:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 16:49:57,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-21 16:49:57,039 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 903 flow. Second operand 8 states and 215 transitions. [2024-06-21 16:49:57,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1362 flow [2024-06-21 16:49:57,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 156 transitions, 1274 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 16:49:57,127 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 990 flow [2024-06-21 16:49:57,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2024-06-21 16:49:57,128 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-21 16:49:57,128 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 990 flow [2024-06-21 16:49:57,128 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 16:49:57,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:57,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:57,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:49:57,129 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 16:49:57,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1400107257, now seen corresponding path program 3 times [2024-06-21 16:49:57,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:57,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110490842] [2024-06-21 16:49:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:57,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110490842] [2024-06-21 16:49:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110490842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:58,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:58,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:58,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387170393] [2024-06-21 16:49:58,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:58,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:58,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:49:58,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 990 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 16:49:58,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:58,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:49:58,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:59,899 INFO L124 PetriNetUnfolderBase]: 9735/13834 cut-off events. [2024-06-21 16:49:59,899 INFO L125 PetriNetUnfolderBase]: For 143329/143329 co-relation queries the response was YES. [2024-06-21 16:49:59,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63029 conditions, 13834 events. 9735/13834 cut-off events. For 143329/143329 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 78619 event pairs, 3700 based on Foata normal form. 6/13797 useless extension candidates. Maximal degree in co-relation 62993. Up to 12759 conditions per place. [2024-06-21 16:49:59,984 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 101 selfloop transitions, 56 changer transitions 0/165 dead transitions. [2024-06-21 16:49:59,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1482 flow [2024-06-21 16:49:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 16:49:59,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165094339622641 [2024-06-21 16:49:59,985 INFO L175 Difference]: Start difference. First operand has 99 places, 116 transitions, 990 flow. Second operand 8 states and 219 transitions. [2024-06-21 16:49:59,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1482 flow [2024-06-21 16:50:00,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 165 transitions, 1358 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:00,068 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 1077 flow [2024-06-21 16:50:00,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1077, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2024-06-21 16:50:00,069 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-21 16:50:00,069 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 1077 flow [2024-06-21 16:50:00,069 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 16:50:00,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:00,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:00,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:50:00,070 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:00,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash -428078429, now seen corresponding path program 2 times [2024-06-21 16:50:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:00,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706723412] [2024-06-21 16:50:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:00,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:00,879 INFO 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 16:50:00,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:00,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706723412] [2024-06-21 16:50:00,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706723412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:00,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:00,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:50:00,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276172192] [2024-06-21 16:50:00,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:00,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:50:00,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:50:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:50:00,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:00,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 1077 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:00,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:00,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:00,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:02,672 INFO L124 PetriNetUnfolderBase]: 9721/13847 cut-off events. [2024-06-21 16:50:02,672 INFO L125 PetriNetUnfolderBase]: For 163516/163531 co-relation queries the response was YES. [2024-06-21 16:50:02,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65534 conditions, 13847 events. 9721/13847 cut-off events. For 163516/163531 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 78927 event pairs, 4077 based on Foata normal form. 14/13826 useless extension candidates. Maximal degree in co-relation 65496. Up to 13210 conditions per place. [2024-06-21 16:50:02,765 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 112 selfloop transitions, 21 changer transitions 0/141 dead transitions. [2024-06-21 16:50:02,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1393 flow [2024-06-21 16:50:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:50:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:50:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 16:50:02,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-21 16:50:02,767 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 1077 flow. Second operand 6 states and 154 transitions. [2024-06-21 16:50:02,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1393 flow [2024-06-21 16:50:02,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1242 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:02,879 INFO L231 Difference]: Finished difference. Result has 104 places, 121 transitions, 977 flow [2024-06-21 16:50:02,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=977, PETRI_PLACES=104, PETRI_TRANSITIONS=121} [2024-06-21 16:50:02,880 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-21 16:50:02,880 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 121 transitions, 977 flow [2024-06-21 16:50:02,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:02,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:02,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:02,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:50:02,881 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 16:50:02,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash -422686847, now seen corresponding path program 1 times [2024-06-21 16:50:02,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:02,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291868055] [2024-06-21 16:50:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:02,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:03,703 INFO 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 16:50:03,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:03,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291868055] [2024-06-21 16:50:03,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291868055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:03,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:03,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:50:03,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804635010] [2024-06-21 16:50:03,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:03,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:50:03,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:50:03,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:50:03,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:50:03,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 121 transitions, 977 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 16:50:03,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:03,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:50:03,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:05,319 INFO L124 PetriNetUnfolderBase]: 8603/12553 cut-off events. [2024-06-21 16:50:05,320 INFO L125 PetriNetUnfolderBase]: For 153598/153598 co-relation queries the response was YES. [2024-06-21 16:50:05,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59120 conditions, 12553 events. 8603/12553 cut-off events. For 153598/153598 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 73937 event pairs, 3492 based on Foata normal form. 4/12492 useless extension candidates. Maximal degree in co-relation 59081. Up to 11727 conditions per place. [2024-06-21 16:50:05,390 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 125 selfloop transitions, 21 changer transitions 0/155 dead transitions. [2024-06-21 16:50:05,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 155 transitions, 1477 flow [2024-06-21 16:50:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:50:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:50:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 16:50:05,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 16:50:05,392 INFO L175 Difference]: Start difference. First operand has 104 places, 121 transitions, 977 flow. Second operand 6 states and 165 transitions. [2024-06-21 16:50:05,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 155 transitions, 1477 flow [2024-06-21 16:50:05,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1418 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:05,474 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1057 flow [2024-06-21 16:50:05,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1057, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-21 16:50:05,475 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-21 16:50:05,475 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1057 flow [2024-06-21 16:50:05,475 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 16:50:05,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:05,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:50:05,476 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:05,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 441901603, now seen corresponding path program 2 times [2024-06-21 16:50:05,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:05,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948314823] [2024-06-21 16:50:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:05,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:06,238 INFO 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 16:50:06,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:06,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948314823] [2024-06-21 16:50:06,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948314823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:06,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:06,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:50:06,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515099538] [2024-06-21 16:50:06,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:50:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:50:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:50:06,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:50:06,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1057 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 16:50:06,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:06,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:50:06,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:07,681 INFO L124 PetriNetUnfolderBase]: 8589/12543 cut-off events. [2024-06-21 16:50:07,681 INFO L125 PetriNetUnfolderBase]: For 172502/172508 co-relation queries the response was YES. [2024-06-21 16:50:07,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61676 conditions, 12543 events. 8589/12543 cut-off events. For 172502/172508 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 74017 event pairs, 3469 based on Foata normal form. 8/12491 useless extension candidates. Maximal degree in co-relation 61636. Up to 11715 conditions per place. [2024-06-21 16:50:07,773 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 119 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-06-21 16:50:07,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1387 flow [2024-06-21 16:50:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:50:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:50:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:50:07,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:50:07,776 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1057 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:50:07,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1387 flow [2024-06-21 16:50:07,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1321 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 16:50:07,919 INFO L231 Difference]: Finished difference. Result has 109 places, 129 transitions, 1042 flow [2024-06-21 16:50:07,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1042, PETRI_PLACES=109, PETRI_TRANSITIONS=129} [2024-06-21 16:50:07,920 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-21 16:50:07,920 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 129 transitions, 1042 flow [2024-06-21 16:50:07,921 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 16:50:07,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:07,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:07,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:50:07,921 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:07,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -396003423, now seen corresponding path program 1 times [2024-06-21 16:50:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889155341] [2024-06-21 16:50:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:08,787 INFO 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 16:50:08,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:08,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889155341] [2024-06-21 16:50:08,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889155341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:08,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:08,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:08,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60187546] [2024-06-21 16:50:08,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:08,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:08,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:08,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:08,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 1042 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 16:50:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:10,559 INFO L124 PetriNetUnfolderBase]: 9849/14019 cut-off events. [2024-06-21 16:50:10,559 INFO L125 PetriNetUnfolderBase]: For 218121/218127 co-relation queries the response was YES. [2024-06-21 16:50:10,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70720 conditions, 14019 events. 9849/14019 cut-off events. For 218121/218127 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 79844 event pairs, 3955 based on Foata normal form. 12/13983 useless extension candidates. Maximal degree in co-relation 70678. Up to 13008 conditions per place. [2024-06-21 16:50:10,672 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 129 selfloop transitions, 52 changer transitions 0/189 dead transitions. [2024-06-21 16:50:10,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 189 transitions, 1836 flow [2024-06-21 16:50:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-21 16:50:10,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390835579514824 [2024-06-21 16:50:10,674 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 1042 flow. Second operand 7 states and 200 transitions. [2024-06-21 16:50:10,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 189 transitions, 1836 flow [2024-06-21 16:50:10,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 189 transitions, 1781 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:10,836 INFO L231 Difference]: Finished difference. Result has 113 places, 147 transitions, 1346 flow [2024-06-21 16:50:10,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1346, PETRI_PLACES=113, PETRI_TRANSITIONS=147} [2024-06-21 16:50:10,836 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-21 16:50:10,837 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 147 transitions, 1346 flow [2024-06-21 16:50:10,837 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 16:50:10,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:10,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:10,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:50:10,837 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 16:50:10,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1821896025, now seen corresponding path program 1 times [2024-06-21 16:50:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:10,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493597748] [2024-06-21 16:50:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493597748] [2024-06-21 16:50:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493597748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:11,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769282787] [2024-06-21 16:50:11,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:11,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:12,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:12,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 147 transitions, 1346 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:12,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:12,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:12,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:13,804 INFO L124 PetriNetUnfolderBase]: 10091/14401 cut-off events. [2024-06-21 16:50:13,804 INFO L125 PetriNetUnfolderBase]: For 254292/254295 co-relation queries the response was YES. [2024-06-21 16:50:13,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77151 conditions, 14401 events. 10091/14401 cut-off events. For 254292/254295 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 82759 event pairs, 4079 based on Foata normal form. 18/14369 useless extension candidates. Maximal degree in co-relation 77106. Up to 13080 conditions per place. [2024-06-21 16:50:13,924 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 53 changer transitions 0/204 dead transitions. [2024-06-21 16:50:13,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 204 transitions, 1969 flow [2024-06-21 16:50:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 16:50:13,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 16:50:13,926 INFO L175 Difference]: Start difference. First operand has 113 places, 147 transitions, 1346 flow. Second operand 8 states and 220 transitions. [2024-06-21 16:50:13,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 204 transitions, 1969 flow [2024-06-21 16:50:14,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 204 transitions, 1873 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 16:50:14,198 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1513 flow [2024-06-21 16:50:14,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-21 16:50:14,199 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-21 16:50:14,199 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1513 flow [2024-06-21 16:50:14,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:14,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:14,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:14,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:50:14,200 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:14,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash -395704893, now seen corresponding path program 2 times [2024-06-21 16:50:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:14,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923147746] [2024-06-21 16:50:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:14,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:15,163 INFO 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 16:50:15,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923147746] [2024-06-21 16:50:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923147746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:15,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:15,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036211984] [2024-06-21 16:50:15,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:15,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:15,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:15,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:15,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1513 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 16:50:15,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:15,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:15,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:17,083 INFO L124 PetriNetUnfolderBase]: 10257/14647 cut-off events. [2024-06-21 16:50:17,084 INFO L125 PetriNetUnfolderBase]: For 273220/273226 co-relation queries the response was YES. [2024-06-21 16:50:17,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79519 conditions, 14647 events. 10257/14647 cut-off events. For 273220/273226 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 84262 event pairs, 4003 based on Foata normal form. 12/14611 useless extension candidates. Maximal degree in co-relation 79471. Up to 13498 conditions per place. [2024-06-21 16:50:17,197 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 136 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-21 16:50:17,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2273 flow [2024-06-21 16:50:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 16:50:17,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-21 16:50:17,198 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1513 flow. Second operand 7 states and 194 transitions. [2024-06-21 16:50:17,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2273 flow [2024-06-21 16:50:17,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 202 transitions, 2185 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:50:17,435 INFO L231 Difference]: Finished difference. Result has 125 places, 166 transitions, 1697 flow [2024-06-21 16:50:17,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1697, PETRI_PLACES=125, PETRI_TRANSITIONS=166} [2024-06-21 16:50:17,436 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-21 16:50:17,436 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 166 transitions, 1697 flow [2024-06-21 16:50:17,436 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 16:50:17,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:17,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:17,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:50:17,437 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:17,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:17,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1098875205, now seen corresponding path program 2 times [2024-06-21 16:50:17,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:17,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043837521] [2024-06-21 16:50:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:17,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:18,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:18,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043837521] [2024-06-21 16:50:18,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043837521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:18,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:18,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447865242] [2024-06-21 16:50:18,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:18,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:18,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:18,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 166 transitions, 1697 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:18,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:18,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:18,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:20,404 INFO L124 PetriNetUnfolderBase]: 10218/14571 cut-off events. [2024-06-21 16:50:20,404 INFO L125 PetriNetUnfolderBase]: For 292648/292651 co-relation queries the response was YES. [2024-06-21 16:50:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79981 conditions, 14571 events. 10218/14571 cut-off events. For 292648/292651 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 83629 event pairs, 2988 based on Foata normal form. 18/14529 useless extension candidates. Maximal degree in co-relation 79931. Up to 12561 conditions per place. [2024-06-21 16:50:20,514 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 139 selfloop transitions, 61 changer transitions 0/208 dead transitions. [2024-06-21 16:50:20,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 208 transitions, 2215 flow [2024-06-21 16:50:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 16:50:20,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 16:50:20,517 INFO L175 Difference]: Start difference. First operand has 125 places, 166 transitions, 1697 flow. Second operand 7 states and 196 transitions. [2024-06-21 16:50:20,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 208 transitions, 2215 flow [2024-06-21 16:50:20,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 208 transitions, 2095 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 16:50:20,789 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1712 flow [2024-06-21 16:50:20,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1712, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-21 16:50:20,790 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-21 16:50:20,790 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1712 flow [2024-06-21 16:50:20,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:20,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:20,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:20,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:50:20,790 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:20,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1089678435, now seen corresponding path program 3 times [2024-06-21 16:50:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:20,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965907629] [2024-06-21 16:50:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965907629] [2024-06-21 16:50:21,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965907629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:21,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:21,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641718336] [2024-06-21 16:50:21,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:21,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:21,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:21,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:21,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:21,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1712 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:21,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:21,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:21,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:23,616 INFO L124 PetriNetUnfolderBase]: 10179/14528 cut-off events. [2024-06-21 16:50:23,617 INFO L125 PetriNetUnfolderBase]: For 310573/310576 co-relation queries the response was YES. [2024-06-21 16:50:23,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80281 conditions, 14528 events. 10179/14528 cut-off events. For 310573/310576 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 83313 event pairs, 2511 based on Foata normal form. 18/14487 useless extension candidates. Maximal degree in co-relation 80230. Up to 12322 conditions per place. [2024-06-21 16:50:23,739 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 133 selfloop transitions, 63 changer transitions 0/204 dead transitions. [2024-06-21 16:50:23,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 204 transitions, 2216 flow [2024-06-21 16:50:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 16:50:23,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 16:50:23,741 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1712 flow. Second operand 7 states and 189 transitions. [2024-06-21 16:50:23,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 204 transitions, 2216 flow [2024-06-21 16:50:23,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 204 transitions, 2054 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:24,000 INFO L231 Difference]: Finished difference. Result has 129 places, 167 transitions, 1695 flow [2024-06-21 16:50:24,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=129, PETRI_TRANSITIONS=167} [2024-06-21 16:50:24,000 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-21 16:50:24,001 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 167 transitions, 1695 flow [2024-06-21 16:50:24,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:24,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:24,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:24,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:50:24,001 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 16:50:24,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -448748315, now seen corresponding path program 3 times [2024-06-21 16:50:24,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:24,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934621064] [2024-06-21 16:50:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:24,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:24,928 INFO 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 16:50:24,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:24,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934621064] [2024-06-21 16:50:24,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934621064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:24,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:24,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:24,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186763845] [2024-06-21 16:50:24,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:24,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:24,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:25,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:25,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 167 transitions, 1695 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 16:50:25,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:25,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:25,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:26,832 INFO L124 PetriNetUnfolderBase]: 10161/14516 cut-off events. [2024-06-21 16:50:26,832 INFO L125 PetriNetUnfolderBase]: For 308066/308081 co-relation queries the response was YES. [2024-06-21 16:50:26,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80566 conditions, 14516 events. 10161/14516 cut-off events. For 308066/308081 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 83420 event pairs, 3989 based on Foata normal form. 18/14479 useless extension candidates. Maximal degree in co-relation 80514. Up to 13376 conditions per place. [2024-06-21 16:50:26,957 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 58 changer transitions 0/196 dead transitions. [2024-06-21 16:50:26,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 196 transitions, 2317 flow [2024-06-21 16:50:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 16:50:26,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-21 16:50:26,958 INFO L175 Difference]: Start difference. First operand has 129 places, 167 transitions, 1695 flow. Second operand 7 states and 187 transitions. [2024-06-21 16:50:26,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 196 transitions, 2317 flow [2024-06-21 16:50:27,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 196 transitions, 2142 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:27,255 INFO L231 Difference]: Finished difference. Result has 131 places, 167 transitions, 1647 flow [2024-06-21 16:50:27,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=131, PETRI_TRANSITIONS=167} [2024-06-21 16:50:27,256 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-21 16:50:27,256 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 167 transitions, 1647 flow [2024-06-21 16:50:27,256 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 16:50:27,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:27,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:50:27,257 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 16:50:27,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1264614931, now seen corresponding path program 1 times [2024-06-21 16:50:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:27,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807837171] [2024-06-21 16:50:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:28,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:28,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807837171] [2024-06-21 16:50:28,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807837171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:28,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:28,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:28,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897156042] [2024-06-21 16:50:28,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:28,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:28,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:28,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:28,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:50:28,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 167 transitions, 1647 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 16:50:28,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:28,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:50:28,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:29,892 INFO L124 PetriNetUnfolderBase]: 9043/13208 cut-off events. [2024-06-21 16:50:29,893 INFO L125 PetriNetUnfolderBase]: For 281221/281221 co-relation queries the response was YES. [2024-06-21 16:50:29,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72694 conditions, 13208 events. 9043/13208 cut-off events. For 281221/281221 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 78274 event pairs, 3499 based on Foata normal form. 4/13138 useless extension candidates. Maximal degree in co-relation 72641. Up to 12371 conditions per place. [2024-06-21 16:50:30,002 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 173 selfloop transitions, 18 changer transitions 0/200 dead transitions. [2024-06-21 16:50:30,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 200 transitions, 2155 flow [2024-06-21 16:50:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:50:30,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-21 16:50:30,003 INFO L175 Difference]: Start difference. First operand has 131 places, 167 transitions, 1647 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:50:30,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 200 transitions, 2155 flow [2024-06-21 16:50:30,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 1998 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:30,279 INFO L231 Difference]: Finished difference. Result has 132 places, 171 transitions, 1595 flow [2024-06-21 16:50:30,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1595, PETRI_PLACES=132, PETRI_TRANSITIONS=171} [2024-06-21 16:50:30,280 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-21 16:50:30,280 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 171 transitions, 1595 flow [2024-06-21 16:50:30,280 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 16:50:30,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:30,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:30,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:50:30,280 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:30,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:30,281 INFO L85 PathProgramCache]: Analyzing trace with hash -218388675, now seen corresponding path program 2 times [2024-06-21 16:50:30,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:30,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827513226] [2024-06-21 16:50:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:30,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:31,116 INFO 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 16:50:31,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827513226] [2024-06-21 16:50:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827513226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163425384] [2024-06-21 16:50:31,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:31,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:50:31,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 171 transitions, 1595 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 16:50:31,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:31,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:50:31,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:32,902 INFO L124 PetriNetUnfolderBase]: 9075/13295 cut-off events. [2024-06-21 16:50:32,902 INFO L125 PetriNetUnfolderBase]: For 303883/303883 co-relation queries the response was YES. [2024-06-21 16:50:32,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74748 conditions, 13295 events. 9075/13295 cut-off events. For 303883/303883 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 79189 event pairs, 3438 based on Foata normal form. 4/13226 useless extension candidates. Maximal degree in co-relation 74696. Up to 12302 conditions per place. [2024-06-21 16:50:33,016 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 166 selfloop transitions, 35 changer transitions 0/210 dead transitions. [2024-06-21 16:50:33,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 210 transitions, 2289 flow [2024-06-21 16:50:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-21 16:50:33,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-21 16:50:33,017 INFO L175 Difference]: Start difference. First operand has 132 places, 171 transitions, 1595 flow. Second operand 7 states and 190 transitions. [2024-06-21 16:50:33,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 210 transitions, 2289 flow [2024-06-21 16:50:33,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 210 transitions, 2214 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:33,310 INFO L231 Difference]: Finished difference. Result has 134 places, 179 transitions, 1727 flow [2024-06-21 16:50:33,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1727, PETRI_PLACES=134, PETRI_TRANSITIONS=179} [2024-06-21 16:50:33,311 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-21 16:50:33,311 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 179 transitions, 1727 flow [2024-06-21 16:50:33,311 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 16:50:33,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:33,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:33,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:50:33,312 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:33,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash 814049499, now seen corresponding path program 3 times [2024-06-21 16:50:33,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:33,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562117188] [2024-06-21 16:50:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:33,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:34,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:34,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562117188] [2024-06-21 16:50:34,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562117188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:34,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:34,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:34,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435536595] [2024-06-21 16:50:34,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:34,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:34,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:34,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:50:34,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 179 transitions, 1727 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 16:50:34,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:34,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:50:34,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:36,089 INFO L124 PetriNetUnfolderBase]: 9061/13283 cut-off events. [2024-06-21 16:50:36,090 INFO L125 PetriNetUnfolderBase]: For 330605/330608 co-relation queries the response was YES. [2024-06-21 16:50:36,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77209 conditions, 13283 events. 9061/13283 cut-off events. For 330605/330608 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 79049 event pairs, 3396 based on Foata normal form. 4/13221 useless extension candidates. Maximal degree in co-relation 77156. Up to 12290 conditions per place. [2024-06-21 16:50:36,200 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 160 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2024-06-21 16:50:36,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 204 transitions, 2179 flow [2024-06-21 16:50:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:50:36,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-21 16:50:36,201 INFO L175 Difference]: Start difference. First operand has 134 places, 179 transitions, 1727 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:50:36,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 204 transitions, 2179 flow [2024-06-21 16:50:36,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 2071 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 16:50:36,461 INFO L231 Difference]: Finished difference. Result has 138 places, 179 transitions, 1698 flow [2024-06-21 16:50:36,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1698, PETRI_PLACES=138, PETRI_TRANSITIONS=179} [2024-06-21 16:50:36,462 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-21 16:50:36,462 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 179 transitions, 1698 flow [2024-06-21 16:50:36,462 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 16:50:36,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:36,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:36,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:50:36,463 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:36,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash -41010891, now seen corresponding path program 1 times [2024-06-21 16:50:36,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:36,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436293258] [2024-06-21 16:50:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:38,064 INFO 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 16:50:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436293258] [2024-06-21 16:50:38,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436293258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:38,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:38,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:38,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969558701] [2024-06-21 16:50:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:38,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:38,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:38,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:50:38,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 179 transitions, 1698 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 16:50:38,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:38,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:50:38,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:40,064 INFO L124 PetriNetUnfolderBase]: 9049/13269 cut-off events. [2024-06-21 16:50:40,064 INFO L125 PetriNetUnfolderBase]: For 348745/348745 co-relation queries the response was YES. [2024-06-21 16:50:40,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77318 conditions, 13269 events. 9049/13269 cut-off events. For 348745/348745 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 79012 event pairs, 3412 based on Foata normal form. 4/13209 useless extension candidates. Maximal degree in co-relation 77263. Up to 12391 conditions per place. [2024-06-21 16:50:40,161 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 183 selfloop transitions, 17 changer transitions 0/209 dead transitions. [2024-06-21 16:50:40,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 209 transitions, 2252 flow [2024-06-21 16:50:40,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:50:40,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-21 16:50:40,163 INFO L175 Difference]: Start difference. First operand has 138 places, 179 transitions, 1698 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:50:40,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 209 transitions, 2252 flow [2024-06-21 16:50:40,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2135 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 16:50:40,440 INFO L231 Difference]: Finished difference. Result has 139 places, 186 transitions, 1732 flow [2024-06-21 16:50:40,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1732, PETRI_PLACES=139, PETRI_TRANSITIONS=186} [2024-06-21 16:50:40,441 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-21 16:50:40,441 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 186 transitions, 1732 flow [2024-06-21 16:50:40,441 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 16:50:40,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:40,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:40,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:50:40,442 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:40,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1340878595, now seen corresponding path program 1 times [2024-06-21 16:50:40,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:40,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872625795] [2024-06-21 16:50:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:41,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:41,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872625795] [2024-06-21 16:50:41,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872625795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:41,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:41,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:50:41,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258970069] [2024-06-21 16:50:41,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:41,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:50:41,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:41,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:50:41,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:50:41,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:50:41,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 186 transitions, 1732 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:41,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:41,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:50:41,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:42,743 INFO L124 PetriNetUnfolderBase]: 8663/12981 cut-off events. [2024-06-21 16:50:42,744 INFO L125 PetriNetUnfolderBase]: For 376556/376724 co-relation queries the response was YES. [2024-06-21 16:50:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78556 conditions, 12981 events. 8663/12981 cut-off events. For 376556/376724 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 80398 event pairs, 3214 based on Foata normal form. 1/12776 useless extension candidates. Maximal degree in co-relation 78500. Up to 11797 conditions per place. [2024-06-21 16:50:42,862 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 170 selfloop transitions, 10 changer transitions 0/201 dead transitions. [2024-06-21 16:50:42,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 201 transitions, 2174 flow [2024-06-21 16:50:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:50:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:50:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 16:50:42,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-21 16:50:42,863 INFO L175 Difference]: Start difference. First operand has 139 places, 186 transitions, 1732 flow. Second operand 5 states and 131 transitions. [2024-06-21 16:50:42,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 201 transitions, 2174 flow [2024-06-21 16:50:43,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2092 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 16:50:43,197 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 1739 flow [2024-06-21 16:50:43,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1739, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-21 16:50:43,198 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-21 16:50:43,198 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 1739 flow [2024-06-21 16:50:43,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:43,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:43,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:43,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:50:43,199 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 16:50:43,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash 612341792, now seen corresponding path program 1 times [2024-06-21 16:50:43,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:43,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606459404] [2024-06-21 16:50:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:44,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606459404] [2024-06-21 16:50:44,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606459404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:44,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:44,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:44,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153724229] [2024-06-21 16:50:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:44,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:44,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:44,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:44,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 1739 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 16:50:44,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:44,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:44,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:46,171 INFO L124 PetriNetUnfolderBase]: 10351/14851 cut-off events. [2024-06-21 16:50:46,171 INFO L125 PetriNetUnfolderBase]: For 475039/475048 co-relation queries the response was YES. [2024-06-21 16:50:46,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93186 conditions, 14851 events. 10351/14851 cut-off events. For 475039/475048 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85955 event pairs, 3965 based on Foata normal form. 12/14855 useless extension candidates. Maximal degree in co-relation 93129. Up to 13523 conditions per place. [2024-06-21 16:50:46,315 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 159 selfloop transitions, 75 changer transitions 0/242 dead transitions. [2024-06-21 16:50:46,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2711 flow [2024-06-21 16:50:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 16:50:46,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 16:50:46,316 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 1739 flow. Second operand 7 states and 196 transitions. [2024-06-21 16:50:46,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2711 flow [2024-06-21 16:50:46,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 242 transitions, 2650 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 16:50:46,672 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2044 flow [2024-06-21 16:50:46,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2044, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-21 16:50:46,673 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-06-21 16:50:46,673 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2044 flow [2024-06-21 16:50:46,673 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 16:50:46,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:46,673 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 16:50:46,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:50:46,673 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 16:50:46,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:46,674 INFO L85 PathProgramCache]: Analyzing trace with hash 618055712, now seen corresponding path program 2 times [2024-06-21 16:50:46,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:46,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638688726] [2024-06-21 16:50:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:47,588 INFO 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 16:50:47,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:47,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638688726] [2024-06-21 16:50:47,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638688726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:47,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:47,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535294383] [2024-06-21 16:50:47,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:47,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:47,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:47,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:47,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:47,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2044 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 16:50:47,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:47,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:47,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:49,693 INFO L124 PetriNetUnfolderBase]: 10323/14820 cut-off events. [2024-06-21 16:50:49,694 INFO L125 PetriNetUnfolderBase]: For 498904/498913 co-relation queries the response was YES. [2024-06-21 16:50:49,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94613 conditions, 14820 events. 10323/14820 cut-off events. For 498904/498913 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85780 event pairs, 3933 based on Foata normal form. 12/14824 useless extension candidates. Maximal degree in co-relation 94554. Up to 13503 conditions per place. [2024-06-21 16:50:49,825 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 160 selfloop transitions, 71 changer transitions 0/239 dead transitions. [2024-06-21 16:50:49,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 239 transitions, 2830 flow [2024-06-21 16:50:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 16:50:49,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202156334231806 [2024-06-21 16:50:49,826 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2044 flow. Second operand 7 states and 193 transitions. [2024-06-21 16:50:49,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 239 transitions, 2830 flow [2024-06-21 16:50:50,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 239 transitions, 2699 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:50:50,235 INFO L231 Difference]: Finished difference. Result has 148 places, 203 transitions, 2067 flow [2024-06-21 16:50:50,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2067, PETRI_PLACES=148, PETRI_TRANSITIONS=203} [2024-06-21 16:50:50,236 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-21 16:50:50,236 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 203 transitions, 2067 flow [2024-06-21 16:50:50,236 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 16:50:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:50,236 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 16:50:50,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:50:50,237 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:50:50,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:50,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1379278086, now seen corresponding path program 3 times [2024-06-21 16:50:50,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:50,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931497112] [2024-06-21 16:50:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:50,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:51,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931497112] [2024-06-21 16:50:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931497112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:51,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345020572] [2024-06-21 16:50:51,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:51,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:51,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:51,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:51,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 203 transitions, 2067 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 16:50:51,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:51,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:51,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:53,387 INFO L124 PetriNetUnfolderBase]: 10299/14761 cut-off events. [2024-06-21 16:50:53,387 INFO L125 PetriNetUnfolderBase]: For 524728/524731 co-relation queries the response was YES. [2024-06-21 16:50:53,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95114 conditions, 14761 events. 10299/14761 cut-off events. For 524728/524731 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85351 event pairs, 3964 based on Foata normal form. 4/14746 useless extension candidates. Maximal degree in co-relation 95055. Up to 13483 conditions per place. [2024-06-21 16:50:53,515 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 153 selfloop transitions, 78 changer transitions 0/239 dead transitions. [2024-06-21 16:50:53,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 2861 flow [2024-06-21 16:50:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 16:50:53,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202156334231806 [2024-06-21 16:50:53,517 INFO L175 Difference]: Start difference. First operand has 148 places, 203 transitions, 2067 flow. Second operand 7 states and 193 transitions. [2024-06-21 16:50:53,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 2861 flow [2024-06-21 16:50:53,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 239 transitions, 2704 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 16:50:53,886 INFO L231 Difference]: Finished difference. Result has 151 places, 203 transitions, 2075 flow [2024-06-21 16:50:53,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2075, PETRI_PLACES=151, PETRI_TRANSITIONS=203} [2024-06-21 16:50:53,886 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-21 16:50:53,887 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 203 transitions, 2075 flow [2024-06-21 16:50:53,887 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 16:50:53,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:53,887 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 16:50:53,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:50:53,887 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 16:50:53,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1819879456, now seen corresponding path program 4 times [2024-06-21 16:50:53,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:53,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486110861] [2024-06-21 16:50:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:53,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:54,741 INFO 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 16:50:54,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:54,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486110861] [2024-06-21 16:50:54,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486110861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:54,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:54,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964656356] [2024-06-21 16:50:54,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:54,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:54,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 203 transitions, 2075 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 16:50:54,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:54,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:54,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:57,061 INFO L124 PetriNetUnfolderBase]: 10331/14803 cut-off events. [2024-06-21 16:50:57,061 INFO L125 PetriNetUnfolderBase]: For 552607/552616 co-relation queries the response was YES. [2024-06-21 16:50:57,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96326 conditions, 14803 events. 10331/14803 cut-off events. For 552607/552616 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85430 event pairs, 3964 based on Foata normal form. 8/14792 useless extension candidates. Maximal degree in co-relation 96266. Up to 13502 conditions per place. [2024-06-21 16:50:57,198 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 148 selfloop transitions, 82 changer transitions 0/238 dead transitions. [2024-06-21 16:50:57,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 238 transitions, 2814 flow [2024-06-21 16:50:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:50:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:50:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 16:50:57,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 16:50:57,200 INFO L175 Difference]: Start difference. First operand has 151 places, 203 transitions, 2075 flow. Second operand 7 states and 189 transitions. [2024-06-21 16:50:57,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 238 transitions, 2814 flow [2024-06-21 16:50:57,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 238 transitions, 2473 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 16:50:57,568 INFO L231 Difference]: Finished difference. Result has 149 places, 207 transitions, 1980 flow [2024-06-21 16:50:57,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1980, PETRI_PLACES=149, PETRI_TRANSITIONS=207} [2024-06-21 16:50:57,568 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-21 16:50:57,568 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 207 transitions, 1980 flow [2024-06-21 16:50:57,569 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 16:50:57,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:57,569 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 16:50:57,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:50:57,569 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 16:50:57,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash -534275518, now seen corresponding path program 5 times [2024-06-21 16:50:57,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:57,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550974641] [2024-06-21 16:50:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:57,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:58,534 INFO 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 16:50:58,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:58,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550974641] [2024-06-21 16:50:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550974641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:58,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:58,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:50:58,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849061869] [2024-06-21 16:50:58,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:58,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:50:58,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:58,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:50:58,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:50:58,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:50:58,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 207 transitions, 1980 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 16:50:58,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:58,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:50:58,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:00,575 INFO L124 PetriNetUnfolderBase]: 10317/14803 cut-off events. [2024-06-21 16:51:00,575 INFO L125 PetriNetUnfolderBase]: For 576533/576548 co-relation queries the response was YES. [2024-06-21 16:51:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96551 conditions, 14803 events. 10317/14803 cut-off events. For 576533/576548 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85725 event pairs, 3935 based on Foata normal form. 14/14799 useless extension candidates. Maximal degree in co-relation 96491. Up to 13494 conditions per place. [2024-06-21 16:51:00,719 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 77 changer transitions 0/234 dead transitions. [2024-06-21 16:51:00,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 234 transitions, 2630 flow [2024-06-21 16:51:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:51:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:51:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:51:00,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-21 16:51:00,720 INFO L175 Difference]: Start difference. First operand has 149 places, 207 transitions, 1980 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:51:00,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 234 transitions, 2630 flow [2024-06-21 16:51:01,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 234 transitions, 2462 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 16:51:01,215 INFO L231 Difference]: Finished difference. Result has 152 places, 207 transitions, 1975 flow [2024-06-21 16:51:01,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1975, PETRI_PLACES=152, PETRI_TRANSITIONS=207} [2024-06-21 16:51:01,215 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-21 16:51:01,215 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 207 transitions, 1975 flow [2024-06-21 16:51:01,216 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 16:51:01,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:01,216 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 16:51:01,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:51:01,216 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 16:51:01,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1284691936, now seen corresponding path program 6 times [2024-06-21 16:51:01,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:01,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506613308] [2024-06-21 16:51:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:01,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:02,077 INFO 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 16:51:02,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:02,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506613308] [2024-06-21 16:51:02,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506613308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:02,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:02,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:51:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874825956] [2024-06-21 16:51:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:51:02,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:02,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:51:02,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:51:02,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:02,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 207 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 16:51:02,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:02,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:02,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:04,132 INFO L124 PetriNetUnfolderBase]: 10279/14749 cut-off events. [2024-06-21 16:51:04,132 INFO L125 PetriNetUnfolderBase]: For 604024/604045 co-relation queries the response was YES. [2024-06-21 16:51:04,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96850 conditions, 14749 events. 10279/14749 cut-off events. For 604024/604045 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85309 event pairs, 3935 based on Foata normal form. 22/14753 useless extension candidates. Maximal degree in co-relation 96789. Up to 13462 conditions per place. [2024-06-21 16:51:04,281 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 151 selfloop transitions, 73 changer transitions 0/232 dead transitions. [2024-06-21 16:51:04,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 232 transitions, 2491 flow [2024-06-21 16:51:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:51:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:51:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:51:04,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-21 16:51:04,283 INFO L175 Difference]: Start difference. First operand has 152 places, 207 transitions, 1975 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:51:04,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 232 transitions, 2491 flow [2024-06-21 16:51:04,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 232 transitions, 2300 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:51:04,792 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 1941 flow [2024-06-21 16:51:04,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1941, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-21 16:51:04,793 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-21 16:51:04,793 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 1941 flow [2024-06-21 16:51:04,793 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 16:51:04,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:04,794 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 16:51:04,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:51:04,794 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:04,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1428018121, now seen corresponding path program 1 times [2024-06-21 16:51:04,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:04,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750834134] [2024-06-21 16:51:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:04,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:05,574 INFO 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 16:51:05,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:05,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750834134] [2024-06-21 16:51:05,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750834134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:05,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:05,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:51:05,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166519395] [2024-06-21 16:51:05,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:05,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:51:05,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:51:05,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:51:05,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:51:05,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 1941 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:05,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:05,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:51:05,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:07,331 INFO L124 PetriNetUnfolderBase]: 9777/14291 cut-off events. [2024-06-21 16:51:07,332 INFO L125 PetriNetUnfolderBase]: For 619114/619274 co-relation queries the response was YES. [2024-06-21 16:51:07,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95778 conditions, 14291 events. 9777/14291 cut-off events. For 619114/619274 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 85568 event pairs, 3692 based on Foata normal form. 1/14161 useless extension candidates. Maximal degree in co-relation 95716. Up to 13255 conditions per place. [2024-06-21 16:51:07,475 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 185 selfloop transitions, 14 changer transitions 0/223 dead transitions. [2024-06-21 16:51:07,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 223 transitions, 2429 flow [2024-06-21 16:51:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:51:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:51:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 16:51:07,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-21 16:51:07,476 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 1941 flow. Second operand 6 states and 147 transitions. [2024-06-21 16:51:07,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 223 transitions, 2429 flow [2024-06-21 16:51:07,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 223 transitions, 2248 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:07,966 INFO L231 Difference]: Finished difference. Result has 153 places, 211 transitions, 1863 flow [2024-06-21 16:51:07,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1863, PETRI_PLACES=153, PETRI_TRANSITIONS=211} [2024-06-21 16:51:07,967 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-21 16:51:07,967 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 211 transitions, 1863 flow [2024-06-21 16:51:07,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:07,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:07,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:07,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:51:07,968 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:07,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1684278240, now seen corresponding path program 1 times [2024-06-21 16:51:07,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:07,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818801418] [2024-06-21 16:51:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:08,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818801418] [2024-06-21 16:51:08,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818801418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:08,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:08,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:08,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906426194] [2024-06-21 16:51:08,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:08,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:08,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:09,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:09,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 211 transitions, 1863 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 16:51:09,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:09,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:09,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:11,437 INFO L124 PetriNetUnfolderBase]: 11105/15860 cut-off events. [2024-06-21 16:51:11,438 INFO L125 PetriNetUnfolderBase]: For 798278/798287 co-relation queries the response was YES. [2024-06-21 16:51:11,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112051 conditions, 15860 events. 11105/15860 cut-off events. For 798278/798287 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 91902 event pairs, 3353 based on Foata normal form. 36/15888 useless extension candidates. Maximal degree in co-relation 111988. Up to 13832 conditions per place. [2024-06-21 16:51:11,570 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 175 selfloop transitions, 90 changer transitions 0/274 dead transitions. [2024-06-21 16:51:11,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 274 transitions, 2839 flow [2024-06-21 16:51:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-21 16:51:11,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-21 16:51:11,571 INFO L175 Difference]: Start difference. First operand has 153 places, 211 transitions, 1863 flow. Second operand 8 states and 228 transitions. [2024-06-21 16:51:11,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 274 transitions, 2839 flow [2024-06-21 16:51:11,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 274 transitions, 2764 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 16:51:11,965 INFO L231 Difference]: Finished difference. Result has 158 places, 219 transitions, 2137 flow [2024-06-21 16:51:11,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=158, PETRI_TRANSITIONS=219} [2024-06-21 16:51:11,965 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-21 16:51:11,965 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 219 transitions, 2137 flow [2024-06-21 16:51:11,966 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 16:51:11,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:11,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:11,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:51:11,966 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:11,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:11,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1692849120, now seen corresponding path program 2 times [2024-06-21 16:51:11,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:11,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70030078] [2024-06-21 16:51:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:12,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:12,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70030078] [2024-06-21 16:51:12,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70030078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:12,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:12,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133973555] [2024-06-21 16:51:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:13,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:13,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 219 transitions, 2137 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 16:51:13,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:13,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:13,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:15,348 INFO L124 PetriNetUnfolderBase]: 11383/16234 cut-off events. [2024-06-21 16:51:15,348 INFO L125 PetriNetUnfolderBase]: For 861375/861384 co-relation queries the response was YES. [2024-06-21 16:51:15,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118576 conditions, 16234 events. 11383/16234 cut-off events. For 861375/861384 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 94094 event pairs, 4071 based on Foata normal form. 44/16266 useless extension candidates. Maximal degree in co-relation 118511. Up to 14626 conditions per place. [2024-06-21 16:51:15,972 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 175 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-21 16:51:15,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 269 transitions, 2868 flow [2024-06-21 16:51:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-21 16:51:15,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-21 16:51:15,974 INFO L175 Difference]: Start difference. First operand has 158 places, 219 transitions, 2137 flow. Second operand 8 states and 221 transitions. [2024-06-21 16:51:15,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 269 transitions, 2868 flow [2024-06-21 16:51:16,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 269 transitions, 2729 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:51:16,543 INFO L231 Difference]: Finished difference. Result has 162 places, 222 transitions, 2252 flow [2024-06-21 16:51:16,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2252, PETRI_PLACES=162, PETRI_TRANSITIONS=222} [2024-06-21 16:51:16,544 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-21 16:51:16,544 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 222 transitions, 2252 flow [2024-06-21 16:51:16,544 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 16:51:16,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:16,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:51:16,544 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:16,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1979736450, now seen corresponding path program 3 times [2024-06-21 16:51:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:16,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572112392] [2024-06-21 16:51:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:17,511 INFO 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 16:51:17,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:17,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572112392] [2024-06-21 16:51:17,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572112392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:17,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:17,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:17,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153413596] [2024-06-21 16:51:17,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:17,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:17,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:17,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:17,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 222 transitions, 2252 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 16:51:17,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:17,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:17,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:20,150 INFO L124 PetriNetUnfolderBase]: 11633/16579 cut-off events. [2024-06-21 16:51:20,150 INFO L125 PetriNetUnfolderBase]: For 909593/909602 co-relation queries the response was YES. [2024-06-21 16:51:20,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122593 conditions, 16579 events. 11633/16579 cut-off events. For 909593/909602 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 96304 event pairs, 4103 based on Foata normal form. 44/16611 useless extension candidates. Maximal degree in co-relation 122526. Up to 14976 conditions per place. [2024-06-21 16:51:20,322 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 179 selfloop transitions, 78 changer transitions 0/266 dead transitions. [2024-06-21 16:51:20,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 266 transitions, 2967 flow [2024-06-21 16:51:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 16:51:20,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-21 16:51:20,323 INFO L175 Difference]: Start difference. First operand has 162 places, 222 transitions, 2252 flow. Second operand 8 states and 215 transitions. [2024-06-21 16:51:20,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 266 transitions, 2967 flow [2024-06-21 16:51:20,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 266 transitions, 2772 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:51:20,906 INFO L231 Difference]: Finished difference. Result has 164 places, 225 transitions, 2303 flow [2024-06-21 16:51:20,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2303, PETRI_PLACES=164, PETRI_TRANSITIONS=225} [2024-06-21 16:51:20,906 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-06-21 16:51:20,907 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 225 transitions, 2303 flow [2024-06-21 16:51:20,907 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 16:51:20,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:20,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:20,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:51:20,907 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:20,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:20,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1177334304, now seen corresponding path program 1 times [2024-06-21 16:51:20,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446618668] [2024-06-21 16:51:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:21,872 INFO 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 16:51:21,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:21,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446618668] [2024-06-21 16:51:21,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446618668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:21,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:21,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:21,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164749587] [2024-06-21 16:51:21,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:21,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:21,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:21,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:22,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:22,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 225 transitions, 2303 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 16:51:22,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:22,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:22,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:25,298 INFO L124 PetriNetUnfolderBase]: 11697/16688 cut-off events. [2024-06-21 16:51:25,298 INFO L125 PetriNetUnfolderBase]: For 930453/930456 co-relation queries the response was YES. [2024-06-21 16:51:25,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123871 conditions, 16688 events. 11697/16688 cut-off events. For 930453/930456 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 97132 event pairs, 4236 based on Foata normal form. 8/16685 useless extension candidates. Maximal degree in co-relation 123803. Up to 15613 conditions per place. [2024-06-21 16:51:25,453 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 210 selfloop transitions, 50 changer transitions 0/269 dead transitions. [2024-06-21 16:51:25,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 269 transitions, 3005 flow [2024-06-21 16:51:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:51:25,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-21 16:51:25,454 INFO L175 Difference]: Start difference. First operand has 164 places, 225 transitions, 2303 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:51:25,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 269 transitions, 3005 flow [2024-06-21 16:51:26,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 269 transitions, 2818 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:51:26,201 INFO L231 Difference]: Finished difference. Result has 166 places, 230 transitions, 2316 flow [2024-06-21 16:51:26,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2316, PETRI_PLACES=166, PETRI_TRANSITIONS=230} [2024-06-21 16:51:26,202 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-06-21 16:51:26,202 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 230 transitions, 2316 flow [2024-06-21 16:51:26,202 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 16:51:26,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:26,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:26,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:51:26,203 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:26,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:26,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1973430492, now seen corresponding path program 2 times [2024-06-21 16:51:26,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:26,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919644831] [2024-06-21 16:51:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:26,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:27,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:27,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919644831] [2024-06-21 16:51:27,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919644831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:27,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:27,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149327993] [2024-06-21 16:51:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:27,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:27,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:27,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:27,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 230 transitions, 2316 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 16:51:27,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:27,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:27,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:30,486 INFO L124 PetriNetUnfolderBase]: 11881/16950 cut-off events. [2024-06-21 16:51:30,487 INFO L125 PetriNetUnfolderBase]: For 981202/981208 co-relation queries the response was YES. [2024-06-21 16:51:30,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128714 conditions, 16950 events. 11881/16950 cut-off events. For 981202/981208 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 98973 event pairs, 4064 based on Foata normal form. 8/16940 useless extension candidates. Maximal degree in co-relation 128645. Up to 14999 conditions per place. [2024-06-21 16:51:30,646 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 167 selfloop transitions, 113 changer transitions 0/289 dead transitions. [2024-06-21 16:51:30,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 289 transitions, 3568 flow [2024-06-21 16:51:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:30,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 16:51:30,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 16:51:30,648 INFO L175 Difference]: Start difference. First operand has 166 places, 230 transitions, 2316 flow. Second operand 8 states and 224 transitions. [2024-06-21 16:51:30,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 289 transitions, 3568 flow [2024-06-21 16:51:31,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 289 transitions, 3368 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:31,359 INFO L231 Difference]: Finished difference. Result has 168 places, 244 transitions, 2643 flow [2024-06-21 16:51:31,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2643, PETRI_PLACES=168, PETRI_TRANSITIONS=244} [2024-06-21 16:51:31,360 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 112 predicate places. [2024-06-21 16:51:31,360 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 244 transitions, 2643 flow [2024-06-21 16:51:31,360 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 16:51:31,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:31,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:31,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:51:31,360 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:31,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1979859582, now seen corresponding path program 3 times [2024-06-21 16:51:31,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:31,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483519673] [2024-06-21 16:51:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:31,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:32,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483519673] [2024-06-21 16:51:32,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483519673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:32,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:32,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:32,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118175352] [2024-06-21 16:51:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:32,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:32,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:32,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:32,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 244 transitions, 2643 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 16:51:32,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:32,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:35,795 INFO L124 PetriNetUnfolderBase]: 12037/17189 cut-off events. [2024-06-21 16:51:35,795 INFO L125 PetriNetUnfolderBase]: For 1057275/1057281 co-relation queries the response was YES. [2024-06-21 16:51:35,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135656 conditions, 17189 events. 12037/17189 cut-off events. For 1057275/1057281 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 100462 event pairs, 4092 based on Foata normal form. 8/17179 useless extension candidates. Maximal degree in co-relation 135585. Up to 15115 conditions per place. [2024-06-21 16:51:35,985 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 169 selfloop transitions, 118 changer transitions 0/296 dead transitions. [2024-06-21 16:51:35,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 296 transitions, 3870 flow [2024-06-21 16:51:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 16:51:35,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 16:51:35,987 INFO L175 Difference]: Start difference. First operand has 168 places, 244 transitions, 2643 flow. Second operand 8 states and 220 transitions. [2024-06-21 16:51:35,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 296 transitions, 3870 flow [2024-06-21 16:51:36,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 296 transitions, 3693 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-21 16:51:36,817 INFO L231 Difference]: Finished difference. Result has 173 places, 253 transitions, 2897 flow [2024-06-21 16:51:36,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=173, PETRI_TRANSITIONS=253} [2024-06-21 16:51:36,818 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 117 predicate places. [2024-06-21 16:51:36,818 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 253 transitions, 2897 flow [2024-06-21 16:51:36,818 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 16:51:36,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:36,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:36,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:51:36,819 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:36,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1980105846, now seen corresponding path program 1 times [2024-06-21 16:51:36,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:36,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295472397] [2024-06-21 16:51:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:36,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:38,269 INFO 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 16:51:38,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:38,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295472397] [2024-06-21 16:51:38,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295472397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:38,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:38,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:38,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738463334] [2024-06-21 16:51:38,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:38,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:38,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:38,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:38,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:38,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 253 transitions, 2897 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 16:51:38,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:38,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:38,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:41,552 INFO L124 PetriNetUnfolderBase]: 12064/17216 cut-off events. [2024-06-21 16:51:41,552 INFO L125 PetriNetUnfolderBase]: For 1098317/1098320 co-relation queries the response was YES. [2024-06-21 16:51:41,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137426 conditions, 17216 events. 12064/17216 cut-off events. For 1098317/1098320 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 100511 event pairs, 4215 based on Foata normal form. 4/17207 useless extension candidates. Maximal degree in co-relation 137353. Up to 16278 conditions per place. [2024-06-21 16:51:41,749 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 254 selfloop transitions, 31 changer transitions 0/294 dead transitions. [2024-06-21 16:51:41,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3679 flow [2024-06-21 16:51:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:51:41,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-21 16:51:41,750 INFO L175 Difference]: Start difference. First operand has 173 places, 253 transitions, 2897 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:51:41,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3679 flow [2024-06-21 16:51:42,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 294 transitions, 3472 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 16:51:42,763 INFO L231 Difference]: Finished difference. Result has 178 places, 260 transitions, 2897 flow [2024-06-21 16:51:42,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=178, PETRI_TRANSITIONS=260} [2024-06-21 16:51:42,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-06-21 16:51:42,763 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 260 transitions, 2897 flow [2024-06-21 16:51:42,764 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 16:51:42,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:42,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:42,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:51:42,764 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:42,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 915320216, now seen corresponding path program 1 times [2024-06-21 16:51:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452989042] [2024-06-21 16:51:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:42,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:43,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452989042] [2024-06-21 16:51:43,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452989042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:43,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:43,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:51:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870900236] [2024-06-21 16:51:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:43,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:51:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:43,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:51:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:51:43,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:51:43,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 260 transitions, 2897 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:43,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:43,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:51:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:46,450 INFO L124 PetriNetUnfolderBase]: 11483/16596 cut-off events. [2024-06-21 16:51:46,451 INFO L125 PetriNetUnfolderBase]: For 1137596/1137808 co-relation queries the response was YES. [2024-06-21 16:51:46,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137052 conditions, 16596 events. 11483/16596 cut-off events. For 1137596/1137808 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 100077 event pairs, 4007 based on Foata normal form. 1/16409 useless extension candidates. Maximal degree in co-relation 136977. Up to 15357 conditions per place. [2024-06-21 16:51:46,632 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 242 selfloop transitions, 14 changer transitions 0/285 dead transitions. [2024-06-21 16:51:46,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 285 transitions, 3541 flow [2024-06-21 16:51:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:51:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:51:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 16:51:46,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-21 16:51:46,633 INFO L175 Difference]: Start difference. First operand has 178 places, 260 transitions, 2897 flow. Second operand 6 states and 156 transitions. [2024-06-21 16:51:46,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 285 transitions, 3541 flow [2024-06-21 16:51:47,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 285 transitions, 3403 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 16:51:47,490 INFO L231 Difference]: Finished difference. Result has 179 places, 264 transitions, 2880 flow [2024-06-21 16:51:47,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2880, PETRI_PLACES=179, PETRI_TRANSITIONS=264} [2024-06-21 16:51:47,491 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-06-21 16:51:47,491 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 264 transitions, 2880 flow [2024-06-21 16:51:47,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:47,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:47,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:47,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:51:47,492 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:51:47,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1170865790, now seen corresponding path program 4 times [2024-06-21 16:51:47,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:47,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999182660] [2024-06-21 16:51:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:47,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:48,621 INFO 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 16:51:48,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:48,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999182660] [2024-06-21 16:51:48,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999182660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:48,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:48,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:48,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761074339] [2024-06-21 16:51:48,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:48,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:48,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:48,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:51:48,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 264 transitions, 2880 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 16:51:48,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:48,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:51:48,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand