./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:56:31,186 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:56:31,234 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:56:31,239 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:56:31,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:56:31,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:56:31,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:56:31,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:56:31,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:56:31,283 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:56:31,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:56:31,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:56:31,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:56:31,284 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:56:31,284 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:56:31,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:56:31,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:56:31,285 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:56:31,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:56:31,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:56:31,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:56:31,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:56:31,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:56:31,292 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:56:31,296 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:56:31,296 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:56:31,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:56:31,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:56:31,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:56:31,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:56:31,297 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:56:31,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:56:31,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:56:31,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:56:31,298 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:56:31,298 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:56:31,298 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:56:31,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:56:31,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:56:31,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:56:31,299 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:56:31,300 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:56:31,300 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:56:31,300 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:56:31,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:56:31,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:56:31,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:56:31,548 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:56:31,549 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:56:31,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 20:56:31,702 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:56:31,702 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:56:31,703 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:56:32,762 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:56:32,974 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:56:32,975 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:56:32,986 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d4d6cec/4e9cd3ebd7274f088110464e657ea76d/FLAG7c57d9cbb [2024-06-27 20:56:33,337 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d4d6cec/4e9cd3ebd7274f088110464e657ea76d [2024-06-27 20:56:33,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:56:33,339 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:56:33,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:56:33,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:56:33,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:56:33,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:56:31" (1/2) ... [2024-06-27 20:56:33,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29876d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:33, skipping insertion in model container [2024-06-27 20:56:33,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:56:31" (1/2) ... [2024-06-27 20:56:33,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d7383a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:33, skipping insertion in model container [2024-06-27 20:56:33,346 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:56:33" (2/2) ... [2024-06-27 20:56:33,347 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29876d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33, skipping insertion in model container [2024-06-27 20:56:33,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:56:33" (2/2) ... [2024-06-27 20:56:33,347 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:56:33,407 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:56:33,408 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:56:33,408 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:56:33,409 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:56:33,409 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:56:33,409 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-27 20:56:33,443 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:56:33,786 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:56:33,796 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:56:33,894 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:56:33,918 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:56:33,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33 WrapperNode [2024-06-27 20:56:33,919 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:56:33,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:56:33,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:56:33,920 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:56:33,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:33,936 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:33,974 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-27 20:56:33,974 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:56:33,975 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:56:33,975 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:56:33,975 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:56:33,984 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:33,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:33,988 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:34,001 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]. [2024-06-27 20:56:34,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:34,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:34,008 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:34,009 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:34,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:34,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:34,032 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:56:34,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:56:34,033 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:56:34,033 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:56:34,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (1/1) ... [2024-06-27 20:56:34,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:56:34,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:56:34,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:56:34,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:56:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:56:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:56:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:56:34,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:56:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:56:34,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:56:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:56:34,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:56:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:56:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:56:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:56:34,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:56:34,171 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:56:34,267 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:56:34,269 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:56:34,554 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:56:34,554 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:56:34,663 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:56:34,663 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:56:34,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:56:34 BoogieIcfgContainer [2024-06-27 20:56:34,663 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:56:34,665 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:56:34,665 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:56:34,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:56:34,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:56:31" (1/4) ... [2024-06-27 20:56:34,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358b8bce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:56:34, skipping insertion in model container [2024-06-27 20:56:34,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:56:33" (2/4) ... [2024-06-27 20:56:34,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358b8bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:56:34, skipping insertion in model container [2024-06-27 20:56:34,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:33" (3/4) ... [2024-06-27 20:56:34,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358b8bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:56:34, skipping insertion in model container [2024-06-27 20:56:34,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:56:34" (4/4) ... [2024-06-27 20:56:34,669 INFO L112 eAbstractionObserver]: Analyzing ICFG safe005_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:56:34,682 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:56:34,682 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:56:34,682 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:56:34,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:56:34,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:56:34,784 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 20:56:34,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:56:34,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:56:34,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:56:34,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 20:56:34,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:56:34,808 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;@3deffae7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:56:34,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:56:34,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:56:34,815 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:56:34,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:56:34,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:34,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:56:34,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:34,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash 362811812, now seen corresponding path program 1 times [2024-06-27 20:56:34,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:34,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006562138] [2024-06-27 20:56:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:34,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:35,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:35,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006562138] [2024-06-27 20:56:35,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006562138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:35,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:35,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:56:35,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755535440] [2024-06-27 20:56:35,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:35,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:56:35,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:56:35,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:56:35,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-27 20:56:35,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:35,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:35,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-27 20:56:35,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:35,968 INFO L124 PetriNetUnfolderBase]: 942/1465 cut-off events. [2024-06-27 20:56:35,968 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:56:35,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 1465 events. 942/1465 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7311 event pairs, 546 based on Foata normal form. 2/1427 useless extension candidates. Maximal degree in co-relation 2969. Up to 1428 conditions per place. [2024-06-27 20:56:35,984 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 20:56:35,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 171 flow [2024-06-27 20:56:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:56:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:56:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 20:56:35,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-27 20:56:35,995 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 80 transitions. [2024-06-27 20:56:35,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 171 flow [2024-06-27 20:56:35,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:36,000 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 20:56:36,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 20:56:36,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 20:56:36,004 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 20:56:36,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:36,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:36,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:36,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:56:36,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:36,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash 769830979, now seen corresponding path program 1 times [2024-06-27 20:56:36,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:36,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185825114] [2024-06-27 20:56:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:36,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:36,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:36,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185825114] [2024-06-27 20:56:36,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185825114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:36,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:36,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:56:36,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263781589] [2024-06-27 20:56:36,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:36,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:56:36,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:56:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:56:36,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:56:36,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:36,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:36,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:56:36,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:36,774 INFO L124 PetriNetUnfolderBase]: 1338/2027 cut-off events. [2024-06-27 20:56:36,774 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-06-27 20:56:36,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 2027 events. 1338/2027 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9649 event pairs, 712 based on Foata normal form. 6/2031 useless extension candidates. Maximal degree in co-relation 4649. Up to 1969 conditions per place. [2024-06-27 20:56:36,786 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-27 20:56:36,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 258 flow [2024-06-27 20:56:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:56:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:56:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 20:56:36,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 20:56:36,789 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 98 transitions. [2024-06-27 20:56:36,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 258 flow [2024-06-27 20:56:36,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:56:36,792 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-27 20:56:36,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-27 20:56:36,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-27 20:56:36,793 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-27 20:56:36,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:36,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:36,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:36,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:56:36,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:36,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:36,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1615943924, now seen corresponding path program 1 times [2024-06-27 20:56:36,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:36,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041279014] [2024-06-27 20:56:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:36,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:37,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:37,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041279014] [2024-06-27 20:56:37,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041279014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:37,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:37,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:56:37,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941017792] [2024-06-27 20:56:37,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:37,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:56:37,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:37,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:56:37,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:56:37,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:56:37,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:37,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:37,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:56:37,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:37,746 INFO L124 PetriNetUnfolderBase]: 980/1539 cut-off events. [2024-06-27 20:56:37,746 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2024-06-27 20:56:37,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3922 conditions, 1539 events. 980/1539 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7617 event pairs, 562 based on Foata normal form. 3/1498 useless extension candidates. Maximal degree in co-relation 3906. Up to 1473 conditions per place. [2024-06-27 20:56:37,754 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-06-27 20:56:37,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 306 flow [2024-06-27 20:56:37,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:56:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:56:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-27 20:56:37,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 20:56:37,756 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 105 transitions. [2024-06-27 20:56:37,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 306 flow [2024-06-27 20:56:37,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 304 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 20:56:37,759 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 221 flow [2024-06-27 20:56:37,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-06-27 20:56:37,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-27 20:56:37,760 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 221 flow [2024-06-27 20:56:37,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:37,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:37,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:37,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:56:37,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:37,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:37,761 INFO L85 PathProgramCache]: Analyzing trace with hash 580485505, now seen corresponding path program 1 times [2024-06-27 20:56:37,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:37,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737377743] [2024-06-27 20:56:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:37,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:38,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737377743] [2024-06-27 20:56:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737377743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:38,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:38,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:56:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906553753] [2024-06-27 20:56:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:38,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:56:38,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:38,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:56:38,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:56:38,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:56:38,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:38,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:38,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:56:38,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:38,967 INFO L124 PetriNetUnfolderBase]: 1323/2004 cut-off events. [2024-06-27 20:56:38,967 INFO L125 PetriNetUnfolderBase]: For 1874/1874 co-relation queries the response was YES. [2024-06-27 20:56:38,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5794 conditions, 2004 events. 1323/2004 cut-off events. For 1874/1874 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9554 event pairs, 467 based on Foata normal form. 6/2008 useless extension candidates. Maximal degree in co-relation 5774. Up to 1916 conditions per place. [2024-06-27 20:56:38,978 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-27 20:56:38,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 77 transitions, 445 flow [2024-06-27 20:56:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 20:56:38,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-27 20:56:38,982 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 221 flow. Second operand 6 states and 137 transitions. [2024-06-27 20:56:38,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 77 transitions, 445 flow [2024-06-27 20:56:38,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 432 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:56:38,987 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 265 flow [2024-06-27 20:56:38,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 20:56:38,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-27 20:56:38,988 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 265 flow [2024-06-27 20:56:38,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:38,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:38,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:38,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:56:38,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:38,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:38,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1411385553, now seen corresponding path program 1 times [2024-06-27 20:56:38,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:38,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846870384] [2024-06-27 20:56:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:38,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:39,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:39,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846870384] [2024-06-27 20:56:39,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846870384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:39,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:39,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:39,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102794212] [2024-06-27 20:56:39,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:39,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:39,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:39,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:39,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:39,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:39,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:39,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:39,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:39,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:39,915 INFO L124 PetriNetUnfolderBase]: 1378/2095 cut-off events. [2024-06-27 20:56:39,915 INFO L125 PetriNetUnfolderBase]: For 3089/3089 co-relation queries the response was YES. [2024-06-27 20:56:39,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6533 conditions, 2095 events. 1378/2095 cut-off events. For 3089/3089 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10095 event pairs, 516 based on Foata normal form. 6/2097 useless extension candidates. Maximal degree in co-relation 6510. Up to 1942 conditions per place. [2024-06-27 20:56:39,927 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-27 20:56:39,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 523 flow [2024-06-27 20:56:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:56:39,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 20:56:39,929 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 265 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:56:39,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 523 flow [2024-06-27 20:56:39,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 498 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:39,937 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 340 flow [2024-06-27 20:56:39,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=340, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-06-27 20:56:39,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-27 20:56:39,939 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 340 flow [2024-06-27 20:56:39,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:39,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:39,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:39,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:56:39,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:39,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1104866197, now seen corresponding path program 1 times [2024-06-27 20:56:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:39,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029213307] [2024-06-27 20:56:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:40,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:40,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029213307] [2024-06-27 20:56:40,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029213307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:40,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:40,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:40,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354060357] [2024-06-27 20:56:40,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:40,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:40,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:40,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:40,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 340 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:40,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:40,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:40,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:40,911 INFO L124 PetriNetUnfolderBase]: 1412/2162 cut-off events. [2024-06-27 20:56:40,911 INFO L125 PetriNetUnfolderBase]: For 4830/4830 co-relation queries the response was YES. [2024-06-27 20:56:40,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7599 conditions, 2162 events. 1412/2162 cut-off events. For 4830/4830 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10418 event pairs, 547 based on Foata normal form. 4/2164 useless extension candidates. Maximal degree in co-relation 7573. Up to 2069 conditions per place. [2024-06-27 20:56:40,924 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 69 selfloop transitions, 16 changer transitions 0/90 dead transitions. [2024-06-27 20:56:40,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 622 flow [2024-06-27 20:56:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:56:40,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-27 20:56:40,925 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 340 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:56:40,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 622 flow [2024-06-27 20:56:40,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 90 transitions, 606 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 20:56:40,931 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 432 flow [2024-06-27 20:56:40,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-27 20:56:40,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-27 20:56:40,931 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 432 flow [2024-06-27 20:56:40,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:40,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:40,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:40,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:56:40,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:40,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:40,933 INFO L85 PathProgramCache]: Analyzing trace with hash -587341517, now seen corresponding path program 2 times [2024-06-27 20:56:40,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:40,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479921825] [2024-06-27 20:56:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:40,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:41,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479921825] [2024-06-27 20:56:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479921825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:41,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:41,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537157639] [2024-06-27 20:56:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:41,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:41,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:41,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:41,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 432 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:41,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:41,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:41,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:41,820 INFO L124 PetriNetUnfolderBase]: 1434/2199 cut-off events. [2024-06-27 20:56:41,821 INFO L125 PetriNetUnfolderBase]: For 6358/6358 co-relation queries the response was YES. [2024-06-27 20:56:41,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8085 conditions, 2199 events. 1434/2199 cut-off events. For 6358/6358 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10686 event pairs, 538 based on Foata normal form. 4/2201 useless extension candidates. Maximal degree in co-relation 8055. Up to 2083 conditions per place. [2024-06-27 20:56:41,835 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-27 20:56:41,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 684 flow [2024-06-27 20:56:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:56:41,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 20:56:41,837 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 432 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:56:41,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 684 flow [2024-06-27 20:56:41,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 645 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:41,843 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 473 flow [2024-06-27 20:56:41,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=473, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-27 20:56:41,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 20:56:41,844 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 473 flow [2024-06-27 20:56:41,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:41,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:41,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:41,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:56:41,845 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:41,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash -553200287, now seen corresponding path program 3 times [2024-06-27 20:56:41,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:41,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474809285] [2024-06-27 20:56:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:41,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:42,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:42,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474809285] [2024-06-27 20:56:42,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474809285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:42,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:42,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:42,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274596166] [2024-06-27 20:56:42,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:42,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:42,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:42,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:42,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:42,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:42,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 473 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:42,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:42,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:42,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:42,686 INFO L124 PetriNetUnfolderBase]: 1408/2158 cut-off events. [2024-06-27 20:56:42,686 INFO L125 PetriNetUnfolderBase]: For 7628/7628 co-relation queries the response was YES. [2024-06-27 20:56:42,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8140 conditions, 2158 events. 1408/2158 cut-off events. For 7628/7628 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10438 event pairs, 542 based on Foata normal form. 8/2160 useless extension candidates. Maximal degree in co-relation 8110. Up to 1948 conditions per place. [2024-06-27 20:56:42,701 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 61 selfloop transitions, 24 changer transitions 0/90 dead transitions. [2024-06-27 20:56:42,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 712 flow [2024-06-27 20:56:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 20:56:42,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 20:56:42,703 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 473 flow. Second operand 6 states and 118 transitions. [2024-06-27 20:56:42,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 712 flow [2024-06-27 20:56:42,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 90 transitions, 662 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:56:42,711 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 512 flow [2024-06-27 20:56:42,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=512, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-27 20:56:42,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-27 20:56:42,712 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 512 flow [2024-06-27 20:56:42,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:42,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:42,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:42,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:56:42,713 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:42,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1856094539, now seen corresponding path program 1 times [2024-06-27 20:56:42,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:42,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740660094] [2024-06-27 20:56:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:42,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740660094] [2024-06-27 20:56:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740660094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:43,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:43,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252523187] [2024-06-27 20:56:43,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:43,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:43,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:43,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:43,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:43,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:43,772 INFO L124 PetriNetUnfolderBase]: 1425/2188 cut-off events. [2024-06-27 20:56:43,772 INFO L125 PetriNetUnfolderBase]: For 7546/7546 co-relation queries the response was YES. [2024-06-27 20:56:43,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8296 conditions, 2188 events. 1425/2188 cut-off events. For 7546/7546 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10600 event pairs, 501 based on Foata normal form. 6/2188 useless extension candidates. Maximal degree in co-relation 8264. Up to 1946 conditions per place. [2024-06-27 20:56:43,786 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 63 selfloop transitions, 31 changer transitions 0/99 dead transitions. [2024-06-27 20:56:43,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 794 flow [2024-06-27 20:56:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:56:43,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-27 20:56:43,787 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 512 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:56:43,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 794 flow [2024-06-27 20:56:43,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 758 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:43,797 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 586 flow [2024-06-27 20:56:43,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=586, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-27 20:56:43,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 20:56:43,798 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 586 flow [2024-06-27 20:56:43,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:43,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:43,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:43,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:56:43,799 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:43,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1704357308, now seen corresponding path program 1 times [2024-06-27 20:56:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:43,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637789274] [2024-06-27 20:56:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:43,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:44,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:44,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637789274] [2024-06-27 20:56:44,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637789274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:44,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:44,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:44,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475191538] [2024-06-27 20:56:44,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:44,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:44,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:44,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:44,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 586 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:44,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:44,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:44,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:45,321 INFO L124 PetriNetUnfolderBase]: 1537/2393 cut-off events. [2024-06-27 20:56:45,322 INFO L125 PetriNetUnfolderBase]: For 10741/10741 co-relation queries the response was YES. [2024-06-27 20:56:45,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9717 conditions, 2393 events. 1537/2393 cut-off events. For 10741/10741 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12100 event pairs, 435 based on Foata normal form. 32/2417 useless extension candidates. Maximal degree in co-relation 9684. Up to 1884 conditions per place. [2024-06-27 20:56:45,338 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 73 selfloop transitions, 44 changer transitions 0/122 dead transitions. [2024-06-27 20:56:45,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 1052 flow [2024-06-27 20:56:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:56:45,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-27 20:56:45,340 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 586 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:56:45,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 1052 flow [2024-06-27 20:56:45,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 978 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:45,354 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 781 flow [2024-06-27 20:56:45,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=781, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-27 20:56:45,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 20:56:45,356 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 781 flow [2024-06-27 20:56:45,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:45,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:45,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:45,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:56:45,357 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:45,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:45,358 INFO L85 PathProgramCache]: Analyzing trace with hash 285269450, now seen corresponding path program 1 times [2024-06-27 20:56:45,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:45,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399544208] [2024-06-27 20:56:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:45,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:46,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399544208] [2024-06-27 20:56:46,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399544208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:46,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:46,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:46,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108783146] [2024-06-27 20:56:46,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:46,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:46,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:46,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:46,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:46,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 781 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:46,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:46,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:46,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:46,643 INFO L124 PetriNetUnfolderBase]: 1560/2432 cut-off events. [2024-06-27 20:56:46,644 INFO L125 PetriNetUnfolderBase]: For 16849/16849 co-relation queries the response was YES. [2024-06-27 20:56:46,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11464 conditions, 2432 events. 1560/2432 cut-off events. For 16849/16849 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12275 event pairs, 474 based on Foata normal form. 2/2432 useless extension candidates. Maximal degree in co-relation 11427. Up to 2300 conditions per place. [2024-06-27 20:56:46,659 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 99 selfloop transitions, 22 changer transitions 0/126 dead transitions. [2024-06-27 20:56:46,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 126 transitions, 1171 flow [2024-06-27 20:56:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:56:46,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:56:46,661 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 781 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:56:46,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 126 transitions, 1171 flow [2024-06-27 20:56:46,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 1107 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:46,678 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 852 flow [2024-06-27 20:56:46,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=852, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-27 20:56:46,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-27 20:56:46,679 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 852 flow [2024-06-27 20:56:46,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:46,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:46,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:46,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:56:46,680 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:46,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1028916310, now seen corresponding path program 2 times [2024-06-27 20:56:46,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:46,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883930843] [2024-06-27 20:56:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:46,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:47,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:47,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883930843] [2024-06-27 20:56:47,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883930843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:47,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:47,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:47,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655228487] [2024-06-27 20:56:47,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:47,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:47,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:47,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:47,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 852 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:47,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:47,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:47,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:47,976 INFO L124 PetriNetUnfolderBase]: 1533/2379 cut-off events. [2024-06-27 20:56:47,976 INFO L125 PetriNetUnfolderBase]: For 18216/18216 co-relation queries the response was YES. [2024-06-27 20:56:47,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11306 conditions, 2379 events. 1533/2379 cut-off events. For 18216/18216 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11881 event pairs, 467 based on Foata normal form. 2/2379 useless extension candidates. Maximal degree in co-relation 11267. Up to 2238 conditions per place. [2024-06-27 20:56:47,990 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-27 20:56:47,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 122 transitions, 1166 flow [2024-06-27 20:56:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:56:47,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 20:56:47,992 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 852 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:56:47,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 122 transitions, 1166 flow [2024-06-27 20:56:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 1106 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:48,010 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 850 flow [2024-06-27 20:56:48,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-27 20:56:48,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-27 20:56:48,011 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 850 flow [2024-06-27 20:56:48,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:48,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:48,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:48,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:56:48,012 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:48,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1295162892, now seen corresponding path program 1 times [2024-06-27 20:56:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:48,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969068687] [2024-06-27 20:56:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:48,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:48,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:48,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969068687] [2024-06-27 20:56:48,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969068687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:48,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:48,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:48,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190904321] [2024-06-27 20:56:48,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:48,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:48,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:48,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:48,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:48,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:48,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:48,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:48,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:48,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:49,246 INFO L124 PetriNetUnfolderBase]: 1544/2403 cut-off events. [2024-06-27 20:56:49,246 INFO L125 PetriNetUnfolderBase]: For 20579/20579 co-relation queries the response was YES. [2024-06-27 20:56:49,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11562 conditions, 2403 events. 1544/2403 cut-off events. For 20579/20579 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12012 event pairs, 468 based on Foata normal form. 2/2399 useless extension candidates. Maximal degree in co-relation 11522. Up to 2216 conditions per place. [2024-06-27 20:56:49,261 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 102 selfloop transitions, 25 changer transitions 0/132 dead transitions. [2024-06-27 20:56:49,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 132 transitions, 1325 flow [2024-06-27 20:56:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:56:49,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:56:49,263 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 850 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:56:49,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 132 transitions, 1325 flow [2024-06-27 20:56:49,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 132 transitions, 1240 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:49,279 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 988 flow [2024-06-27 20:56:49,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=988, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-27 20:56:49,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 20:56:49,280 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 988 flow [2024-06-27 20:56:49,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:49,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:49,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:49,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:56:49,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:49,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1295459562, now seen corresponding path program 2 times [2024-06-27 20:56:49,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:49,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858169544] [2024-06-27 20:56:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:49,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:50,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:50,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858169544] [2024-06-27 20:56:50,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858169544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:50,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:50,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:50,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702215594] [2024-06-27 20:56:50,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:50,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:50,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:50,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:50,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:50,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 988 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:50,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:50,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:50,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:50,542 INFO L124 PetriNetUnfolderBase]: 1550/2407 cut-off events. [2024-06-27 20:56:50,542 INFO L125 PetriNetUnfolderBase]: For 20936/20936 co-relation queries the response was YES. [2024-06-27 20:56:50,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11937 conditions, 2407 events. 1550/2407 cut-off events. For 20936/20936 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11982 event pairs, 462 based on Foata normal form. 4/2405 useless extension candidates. Maximal degree in co-relation 11894. Up to 2120 conditions per place. [2024-06-27 20:56:50,557 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 90 selfloop transitions, 43 changer transitions 0/138 dead transitions. [2024-06-27 20:56:50,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 138 transitions, 1376 flow [2024-06-27 20:56:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:56:50,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-27 20:56:50,559 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 988 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:56:50,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 138 transitions, 1376 flow [2024-06-27 20:56:50,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1305 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:56:50,578 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 1065 flow [2024-06-27 20:56:50,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1065, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2024-06-27 20:56:50,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 20:56:50,578 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 1065 flow [2024-06-27 20:56:50,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:50,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:50,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:50,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:56:50,579 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:50,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2056858795, now seen corresponding path program 1 times [2024-06-27 20:56:50,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:50,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162161573] [2024-06-27 20:56:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:50,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:51,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:51,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162161573] [2024-06-27 20:56:51,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162161573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:51,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:51,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320704674] [2024-06-27 20:56:51,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:51,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:51,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:51,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:51,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 1065 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:51,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:51,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:51,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:51,592 INFO L124 PetriNetUnfolderBase]: 1560/2427 cut-off events. [2024-06-27 20:56:51,592 INFO L125 PetriNetUnfolderBase]: For 23331/23331 co-relation queries the response was YES. [2024-06-27 20:56:51,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12510 conditions, 2427 events. 1560/2427 cut-off events. For 23331/23331 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12156 event pairs, 454 based on Foata normal form. 2/2427 useless extension candidates. Maximal degree in co-relation 12466. Up to 2271 conditions per place. [2024-06-27 20:56:51,605 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 113 selfloop transitions, 23 changer transitions 0/141 dead transitions. [2024-06-27 20:56:51,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 141 transitions, 1499 flow [2024-06-27 20:56:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:56:51,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 20:56:51,606 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 1065 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:56:51,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 141 transitions, 1499 flow [2024-06-27 20:56:51,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 141 transitions, 1385 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:51,632 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 1088 flow [2024-06-27 20:56:51,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1088, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2024-06-27 20:56:51,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-27 20:56:51,633 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 1088 flow [2024-06-27 20:56:51,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:51,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:51,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:51,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:56:51,633 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:51,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:51,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1495345435, now seen corresponding path program 1 times [2024-06-27 20:56:51,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:51,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068250015] [2024-06-27 20:56:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:51,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:52,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068250015] [2024-06-27 20:56:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068250015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:52,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:52,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:52,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163643048] [2024-06-27 20:56:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:52,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:52,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:52,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:52,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:52,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 1088 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:52,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:52,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:52,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:53,119 INFO L124 PetriNetUnfolderBase]: 1669/2614 cut-off events. [2024-06-27 20:56:53,119 INFO L125 PetriNetUnfolderBase]: For 26358/26358 co-relation queries the response was YES. [2024-06-27 20:56:53,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13196 conditions, 2614 events. 1669/2614 cut-off events. For 26358/26358 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13373 event pairs, 481 based on Foata normal form. 28/2636 useless extension candidates. Maximal degree in co-relation 13150. Up to 2193 conditions per place. [2024-06-27 20:56:53,134 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 112 selfloop transitions, 40 changer transitions 0/157 dead transitions. [2024-06-27 20:56:53,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 157 transitions, 1548 flow [2024-06-27 20:56:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:56:53,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-27 20:56:53,136 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 1088 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:56:53,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 157 transitions, 1548 flow [2024-06-27 20:56:53,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 157 transitions, 1534 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 20:56:53,169 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1225 flow [2024-06-27 20:56:53,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1225, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-27 20:56:53,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 20:56:53,170 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1225 flow [2024-06-27 20:56:53,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:53,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:53,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:53,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:56:53,171 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:53,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1504868635, now seen corresponding path program 2 times [2024-06-27 20:56:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:53,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945659908] [2024-06-27 20:56:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:53,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:53,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945659908] [2024-06-27 20:56:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945659908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:53,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:53,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:53,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897597214] [2024-06-27 20:56:53,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:54,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:54,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1225 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:54,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:54,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:54,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:54,543 INFO L124 PetriNetUnfolderBase]: 1686/2646 cut-off events. [2024-06-27 20:56:54,543 INFO L125 PetriNetUnfolderBase]: For 28336/28336 co-relation queries the response was YES. [2024-06-27 20:56:54,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14012 conditions, 2646 events. 1686/2646 cut-off events. For 28336/28336 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13604 event pairs, 434 based on Foata normal form. 4/2644 useless extension candidates. Maximal degree in co-relation 13962. Up to 2317 conditions per place. [2024-06-27 20:56:54,559 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 37 changer transitions 0/166 dead transitions. [2024-06-27 20:56:54,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 166 transitions, 1812 flow [2024-06-27 20:56:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:56:54,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:56:54,562 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1225 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:56:54,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 166 transitions, 1812 flow [2024-06-27 20:56:54,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 166 transitions, 1728 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:54,593 INFO L231 Difference]: Finished difference. Result has 110 places, 137 transitions, 1346 flow [2024-06-27 20:56:54,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1346, PETRI_PLACES=110, PETRI_TRANSITIONS=137} [2024-06-27 20:56:54,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-27 20:56:54,594 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 137 transitions, 1346 flow [2024-06-27 20:56:54,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:54,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:54,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:54,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:56:54,595 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:54,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:54,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1504542205, now seen corresponding path program 3 times [2024-06-27 20:56:54,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:54,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990361949] [2024-06-27 20:56:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:54,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:55,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:55,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990361949] [2024-06-27 20:56:55,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990361949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:55,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:55,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:55,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463353644] [2024-06-27 20:56:55,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:55,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:55,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:55,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:55,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:55,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:55,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 137 transitions, 1346 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:55,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:55,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:55,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:55,965 INFO L124 PetriNetUnfolderBase]: 1678/2634 cut-off events. [2024-06-27 20:56:55,966 INFO L125 PetriNetUnfolderBase]: For 31268/31268 co-relation queries the response was YES. [2024-06-27 20:56:55,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14318 conditions, 2634 events. 1678/2634 cut-off events. For 31268/31268 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13501 event pairs, 474 based on Foata normal form. 4/2632 useless extension candidates. Maximal degree in co-relation 14265. Up to 2388 conditions per place. [2024-06-27 20:56:55,981 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 127 selfloop transitions, 31 changer transitions 0/163 dead transitions. [2024-06-27 20:56:55,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 163 transitions, 1772 flow [2024-06-27 20:56:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:56:55,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 20:56:55,983 INFO L175 Difference]: Start difference. First operand has 110 places, 137 transitions, 1346 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:56:55,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 163 transitions, 1772 flow [2024-06-27 20:56:56,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 163 transitions, 1693 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:56,024 INFO L231 Difference]: Finished difference. Result has 115 places, 137 transitions, 1336 flow [2024-06-27 20:56:56,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1336, PETRI_PLACES=115, PETRI_TRANSITIONS=137} [2024-06-27 20:56:56,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-27 20:56:56,025 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 137 transitions, 1336 flow [2024-06-27 20:56:56,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:56,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:56,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:56,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:56:56,025 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:56,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:56,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1786528235, now seen corresponding path program 2 times [2024-06-27 20:56:56,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:56,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709624729] [2024-06-27 20:56:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:56,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:56,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:56,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709624729] [2024-06-27 20:56:56,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709624729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:56,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:56,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504119951] [2024-06-27 20:56:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:56,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:56,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:56,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:56,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 137 transitions, 1336 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:56,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:56,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:56,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:57,030 INFO L124 PetriNetUnfolderBase]: 1692/2664 cut-off events. [2024-06-27 20:56:57,031 INFO L125 PetriNetUnfolderBase]: For 33179/33179 co-relation queries the response was YES. [2024-06-27 20:56:57,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14444 conditions, 2664 events. 1692/2664 cut-off events. For 33179/33179 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13772 event pairs, 473 based on Foata normal form. 6/2668 useless extension candidates. Maximal degree in co-relation 14389. Up to 2478 conditions per place. [2024-06-27 20:56:57,046 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 123 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2024-06-27 20:56:57,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1728 flow [2024-06-27 20:56:57,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:56:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:56:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-27 20:56:57,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-27 20:56:57,048 INFO L175 Difference]: Start difference. First operand has 115 places, 137 transitions, 1336 flow. Second operand 5 states and 104 transitions. [2024-06-27 20:56:57,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1728 flow [2024-06-27 20:56:57,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1616 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:56:57,087 INFO L231 Difference]: Finished difference. Result has 112 places, 140 transitions, 1336 flow [2024-06-27 20:56:57,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1336, PETRI_PLACES=112, PETRI_TRANSITIONS=140} [2024-06-27 20:56:57,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-27 20:56:57,087 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 140 transitions, 1336 flow [2024-06-27 20:56:57,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:57,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:57,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:57,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:56:57,088 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:57,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash 943278261, now seen corresponding path program 1 times [2024-06-27 20:56:57,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:57,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276239355] [2024-06-27 20:56:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:57,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:57,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276239355] [2024-06-27 20:56:57,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276239355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:57,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:57,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:57,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928310431] [2024-06-27 20:56:57,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:57,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:57,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:57,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:57,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:57,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:57,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 140 transitions, 1336 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:57,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:57,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:57,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:58,441 INFO L124 PetriNetUnfolderBase]: 1709/2683 cut-off events. [2024-06-27 20:56:58,441 INFO L125 PetriNetUnfolderBase]: For 36219/36219 co-relation queries the response was YES. [2024-06-27 20:56:58,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14840 conditions, 2683 events. 1709/2683 cut-off events. For 36219/36219 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13818 event pairs, 313 based on Foata normal form. 4/2685 useless extension candidates. Maximal degree in co-relation 14786. Up to 2477 conditions per place. [2024-06-27 20:56:58,459 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 145 selfloop transitions, 21 changer transitions 0/171 dead transitions. [2024-06-27 20:56:58,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 171 transitions, 1792 flow [2024-06-27 20:56:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:56:58,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:56:58,460 INFO L175 Difference]: Start difference. First operand has 112 places, 140 transitions, 1336 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:56:58,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 171 transitions, 1792 flow [2024-06-27 20:56:58,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 1750 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:58,517 INFO L231 Difference]: Finished difference. Result has 117 places, 142 transitions, 1373 flow [2024-06-27 20:56:58,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1373, PETRI_PLACES=117, PETRI_TRANSITIONS=142} [2024-06-27 20:56:58,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-27 20:56:58,518 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 142 transitions, 1373 flow [2024-06-27 20:56:58,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:58,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:58,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:58,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:56:58,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:58,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1834649585, now seen corresponding path program 2 times [2024-06-27 20:56:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:58,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615721057] [2024-06-27 20:56:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:59,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615721057] [2024-06-27 20:56:59,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615721057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:59,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:59,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:59,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297615384] [2024-06-27 20:56:59,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:59,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:59,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:59,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:56:59,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 142 transitions, 1373 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:59,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:59,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:56:59,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:59,967 INFO L124 PetriNetUnfolderBase]: 1726/2713 cut-off events. [2024-06-27 20:56:59,967 INFO L125 PetriNetUnfolderBase]: For 39840/39840 co-relation queries the response was YES. [2024-06-27 20:56:59,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15287 conditions, 2713 events. 1726/2713 cut-off events. For 39840/39840 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13974 event pairs, 434 based on Foata normal form. 4/2715 useless extension candidates. Maximal degree in co-relation 15232. Up to 2522 conditions per place. [2024-06-27 20:56:59,985 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2024-06-27 20:56:59,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 172 transitions, 1833 flow [2024-06-27 20:56:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:56:59,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:56:59,987 INFO L175 Difference]: Start difference. First operand has 117 places, 142 transitions, 1373 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:56:59,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 172 transitions, 1833 flow [2024-06-27 20:57:00,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 172 transitions, 1772 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:00,036 INFO L231 Difference]: Finished difference. Result has 119 places, 144 transitions, 1404 flow [2024-06-27 20:57:00,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1404, PETRI_PLACES=119, PETRI_TRANSITIONS=144} [2024-06-27 20:57:00,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-27 20:57:00,037 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 144 transitions, 1404 flow [2024-06-27 20:57:00,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:00,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:00,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:00,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:57:00,038 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:00,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:00,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1227065525, now seen corresponding path program 3 times [2024-06-27 20:57:00,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:00,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005733767] [2024-06-27 20:57:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:00,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:00,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005733767] [2024-06-27 20:57:00,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005733767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:00,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:00,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803152353] [2024-06-27 20:57:00,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:00,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:00,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:00,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 144 transitions, 1404 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:00,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:00,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:00,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:01,383 INFO L124 PetriNetUnfolderBase]: 1718/2701 cut-off events. [2024-06-27 20:57:01,383 INFO L125 PetriNetUnfolderBase]: For 43014/43014 co-relation queries the response was YES. [2024-06-27 20:57:01,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15403 conditions, 2701 events. 1718/2701 cut-off events. For 43014/43014 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13887 event pairs, 430 based on Foata normal form. 4/2703 useless extension candidates. Maximal degree in co-relation 15347. Up to 2518 conditions per place. [2024-06-27 20:57:01,399 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 146 selfloop transitions, 24 changer transitions 0/175 dead transitions. [2024-06-27 20:57:01,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 175 transitions, 1899 flow [2024-06-27 20:57:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:57:01,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:57:01,401 INFO L175 Difference]: Start difference. First operand has 119 places, 144 transitions, 1404 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:57:01,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 175 transitions, 1899 flow [2024-06-27 20:57:01,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 175 transitions, 1827 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:01,451 INFO L231 Difference]: Finished difference. Result has 122 places, 149 transitions, 1466 flow [2024-06-27 20:57:01,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1466, PETRI_PLACES=122, PETRI_TRANSITIONS=149} [2024-06-27 20:57:01,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-27 20:57:01,452 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 149 transitions, 1466 flow [2024-06-27 20:57:01,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:01,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:01,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:01,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:57:01,453 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:01,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:01,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2122251089, now seen corresponding path program 1 times [2024-06-27 20:57:01,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:01,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51007514] [2024-06-27 20:57:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:01,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:02,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:02,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51007514] [2024-06-27 20:57:02,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51007514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:02,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:02,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:02,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114639341] [2024-06-27 20:57:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:02,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:02,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:02,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:02,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:02,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:02,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 149 transitions, 1466 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:02,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:02,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:02,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:03,181 INFO L124 PetriNetUnfolderBase]: 1740/2741 cut-off events. [2024-06-27 20:57:03,181 INFO L125 PetriNetUnfolderBase]: For 46647/46647 co-relation queries the response was YES. [2024-06-27 20:57:03,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15861 conditions, 2741 events. 1740/2741 cut-off events. For 46647/46647 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14231 event pairs, 435 based on Foata normal form. 2/2737 useless extension candidates. Maximal degree in co-relation 15803. Up to 2431 conditions per place. [2024-06-27 20:57:03,204 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 128 selfloop transitions, 49 changer transitions 0/182 dead transitions. [2024-06-27 20:57:03,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 1997 flow [2024-06-27 20:57:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:57:03,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:57:03,206 INFO L175 Difference]: Start difference. First operand has 122 places, 149 transitions, 1466 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:57:03,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 182 transitions, 1997 flow [2024-06-27 20:57:03,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 182 transitions, 1921 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:03,259 INFO L231 Difference]: Finished difference. Result has 126 places, 155 transitions, 1583 flow [2024-06-27 20:57:03,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1583, PETRI_PLACES=126, PETRI_TRANSITIONS=155} [2024-06-27 20:57:03,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-27 20:57:03,260 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 155 transitions, 1583 flow [2024-06-27 20:57:03,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:03,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:03,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:03,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:57:03,261 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:03,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:03,261 INFO L85 PathProgramCache]: Analyzing trace with hash -661885284, now seen corresponding path program 1 times [2024-06-27 20:57:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:03,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484020404] [2024-06-27 20:57:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:03,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:03,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:03,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484020404] [2024-06-27 20:57:03,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484020404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:03,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:03,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:03,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340565590] [2024-06-27 20:57:03,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:03,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:03,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:03,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:03,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 155 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:03,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:03,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:03,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:04,317 INFO L124 PetriNetUnfolderBase]: 1760/2771 cut-off events. [2024-06-27 20:57:04,317 INFO L125 PetriNetUnfolderBase]: For 51487/51487 co-relation queries the response was YES. [2024-06-27 20:57:04,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16501 conditions, 2771 events. 1760/2771 cut-off events. For 51487/51487 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14393 event pairs, 434 based on Foata normal form. 4/2773 useless extension candidates. Maximal degree in co-relation 16442. Up to 2528 conditions per place. [2024-06-27 20:57:04,336 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 142 selfloop transitions, 35 changer transitions 0/182 dead transitions. [2024-06-27 20:57:04,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 2153 flow [2024-06-27 20:57:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:57:04,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 20:57:04,338 INFO L175 Difference]: Start difference. First operand has 126 places, 155 transitions, 1583 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:57:04,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 182 transitions, 2153 flow [2024-06-27 20:57:04,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 182 transitions, 2008 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:04,395 INFO L231 Difference]: Finished difference. Result has 126 places, 161 transitions, 1596 flow [2024-06-27 20:57:04,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1596, PETRI_PLACES=126, PETRI_TRANSITIONS=161} [2024-06-27 20:57:04,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-27 20:57:04,395 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 161 transitions, 1596 flow [2024-06-27 20:57:04,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:04,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:04,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:04,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:57:04,396 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:04,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash -888939221, now seen corresponding path program 2 times [2024-06-27 20:57:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:04,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249303763] [2024-06-27 20:57:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:05,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249303763] [2024-06-27 20:57:05,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249303763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:05,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:05,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:05,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553532085] [2024-06-27 20:57:05,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:05,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:05,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:05,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:05,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:05,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:05,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 161 transitions, 1596 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:05,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:05,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:05,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:05,839 INFO L124 PetriNetUnfolderBase]: 1771/2790 cut-off events. [2024-06-27 20:57:05,840 INFO L125 PetriNetUnfolderBase]: For 55668/55668 co-relation queries the response was YES. [2024-06-27 20:57:05,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16869 conditions, 2790 events. 1771/2790 cut-off events. For 55668/55668 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14544 event pairs, 436 based on Foata normal form. 2/2786 useless extension candidates. Maximal degree in co-relation 16810. Up to 2431 conditions per place. [2024-06-27 20:57:05,859 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 56 changer transitions 0/193 dead transitions. [2024-06-27 20:57:05,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 193 transitions, 2128 flow [2024-06-27 20:57:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:57:05,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-27 20:57:05,861 INFO L175 Difference]: Start difference. First operand has 126 places, 161 transitions, 1596 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:57:05,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 193 transitions, 2128 flow [2024-06-27 20:57:05,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 193 transitions, 2081 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:05,923 INFO L231 Difference]: Finished difference. Result has 132 places, 164 transitions, 1729 flow [2024-06-27 20:57:05,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1729, PETRI_PLACES=132, PETRI_TRANSITIONS=164} [2024-06-27 20:57:05,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 20:57:05,924 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 164 transitions, 1729 flow [2024-06-27 20:57:05,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:05,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:05,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:05,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:57:05,925 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:05,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash -603839351, now seen corresponding path program 3 times [2024-06-27 20:57:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:05,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190814689] [2024-06-27 20:57:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:06,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:06,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190814689] [2024-06-27 20:57:06,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190814689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:06,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:06,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:06,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882092098] [2024-06-27 20:57:06,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:06,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:06,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:06,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:06,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 164 transitions, 1729 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:06,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:06,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:06,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:07,584 INFO L124 PetriNetUnfolderBase]: 1766/2783 cut-off events. [2024-06-27 20:57:07,584 INFO L125 PetriNetUnfolderBase]: For 60860/60860 co-relation queries the response was YES. [2024-06-27 20:57:07,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17355 conditions, 2783 events. 1766/2783 cut-off events. For 60860/60860 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14515 event pairs, 439 based on Foata normal form. 2/2779 useless extension candidates. Maximal degree in co-relation 17294. Up to 2423 conditions per place. [2024-06-27 20:57:07,605 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 134 selfloop transitions, 59 changer transitions 0/198 dead transitions. [2024-06-27 20:57:07,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 198 transitions, 2285 flow [2024-06-27 20:57:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:57:07,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 20:57:07,607 INFO L175 Difference]: Start difference. First operand has 132 places, 164 transitions, 1729 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:57:07,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 198 transitions, 2285 flow [2024-06-27 20:57:07,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 198 transitions, 2129 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:07,687 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 1769 flow [2024-06-27 20:57:07,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1769, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-06-27 20:57:07,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 20:57:07,688 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 1769 flow [2024-06-27 20:57:07,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:07,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:07,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:07,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:57:07,688 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:07,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:07,689 INFO L85 PathProgramCache]: Analyzing trace with hash -453981990, now seen corresponding path program 2 times [2024-06-27 20:57:07,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:07,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169832241] [2024-06-27 20:57:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:07,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:08,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:08,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169832241] [2024-06-27 20:57:08,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169832241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:08,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:08,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:08,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166036076] [2024-06-27 20:57:08,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:08,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:08,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:08,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:08,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:08,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 1769 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:08,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:08,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:08,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:08,775 INFO L124 PetriNetUnfolderBase]: 1754/2769 cut-off events. [2024-06-27 20:57:08,775 INFO L125 PetriNetUnfolderBase]: For 64613/64613 co-relation queries the response was YES. [2024-06-27 20:57:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17536 conditions, 2769 events. 1754/2769 cut-off events. For 64613/64613 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14431 event pairs, 426 based on Foata normal form. 4/2771 useless extension candidates. Maximal degree in co-relation 17474. Up to 2557 conditions per place. [2024-06-27 20:57:08,799 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 150 selfloop transitions, 30 changer transitions 0/185 dead transitions. [2024-06-27 20:57:08,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 185 transitions, 2209 flow [2024-06-27 20:57:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:57:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:57:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:57:08,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 20:57:08,817 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 1769 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:57:08,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 185 transitions, 2209 flow [2024-06-27 20:57:08,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 185 transitions, 2015 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-27 20:57:08,890 INFO L231 Difference]: Finished difference. Result has 132 places, 167 transitions, 1641 flow [2024-06-27 20:57:08,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1641, PETRI_PLACES=132, PETRI_TRANSITIONS=167} [2024-06-27 20:57:08,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 20:57:08,891 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 167 transitions, 1641 flow [2024-06-27 20:57:08,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:08,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:08,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:08,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:57:08,892 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:08,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash -629234464, now seen corresponding path program 1 times [2024-06-27 20:57:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:08,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439499104] [2024-06-27 20:57:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:08,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:09,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:09,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439499104] [2024-06-27 20:57:09,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439499104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:09,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:09,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:09,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505264121] [2024-06-27 20:57:09,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:09,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:09,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:09,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:09,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:09,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 167 transitions, 1641 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:09,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:09,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:09,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:09,883 INFO L124 PetriNetUnfolderBase]: 1801/2832 cut-off events. [2024-06-27 20:57:09,884 INFO L125 PetriNetUnfolderBase]: For 62943/62943 co-relation queries the response was YES. [2024-06-27 20:57:09,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17454 conditions, 2832 events. 1801/2832 cut-off events. For 62943/62943 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14757 event pairs, 431 based on Foata normal form. 3/2829 useless extension candidates. Maximal degree in co-relation 17392. Up to 2471 conditions per place. [2024-06-27 20:57:09,906 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 48 changer transitions 0/207 dead transitions. [2024-06-27 20:57:09,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 207 transitions, 2435 flow [2024-06-27 20:57:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:57:09,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-27 20:57:09,907 INFO L175 Difference]: Start difference. First operand has 132 places, 167 transitions, 1641 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:57:09,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 207 transitions, 2435 flow [2024-06-27 20:57:09,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 207 transitions, 2335 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:09,977 INFO L231 Difference]: Finished difference. Result has 136 places, 185 transitions, 1895 flow [2024-06-27 20:57:09,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1895, PETRI_PLACES=136, PETRI_TRANSITIONS=185} [2024-06-27 20:57:09,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 20:57:09,977 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 185 transitions, 1895 flow [2024-06-27 20:57:09,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:09,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:09,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:09,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:57:09,978 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:09,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:09,978 INFO L85 PathProgramCache]: Analyzing trace with hash -447334328, now seen corresponding path program 2 times [2024-06-27 20:57:09,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:09,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016387946] [2024-06-27 20:57:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:09,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:10,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016387946] [2024-06-27 20:57:10,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016387946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:10,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:10,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:10,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206804356] [2024-06-27 20:57:10,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:10,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:10,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:10,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:10,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 185 transitions, 1895 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:10,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:10,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:10,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:11,210 INFO L124 PetriNetUnfolderBase]: 1969/3088 cut-off events. [2024-06-27 20:57:11,211 INFO L125 PetriNetUnfolderBase]: For 76919/76919 co-relation queries the response was YES. [2024-06-27 20:57:11,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20132 conditions, 3088 events. 1969/3088 cut-off events. For 76919/76919 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16343 event pairs, 442 based on Foata normal form. 9/3095 useless extension candidates. Maximal degree in co-relation 20067. Up to 2798 conditions per place. [2024-06-27 20:57:11,236 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 187 selfloop transitions, 36 changer transitions 0/228 dead transitions. [2024-06-27 20:57:11,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 228 transitions, 2755 flow [2024-06-27 20:57:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:57:11,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:57:11,238 INFO L175 Difference]: Start difference. First operand has 136 places, 185 transitions, 1895 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:57:11,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 228 transitions, 2755 flow [2024-06-27 20:57:11,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 228 transitions, 2681 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-27 20:57:11,349 INFO L231 Difference]: Finished difference. Result has 144 places, 205 transitions, 2204 flow [2024-06-27 20:57:11,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2204, PETRI_PLACES=144, PETRI_TRANSITIONS=205} [2024-06-27 20:57:11,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-27 20:57:11,350 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 205 transitions, 2204 flow [2024-06-27 20:57:11,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:11,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:11,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:11,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:57:11,350 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:11,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash -10476832, now seen corresponding path program 3 times [2024-06-27 20:57:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:11,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147092654] [2024-06-27 20:57:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:11,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:11,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147092654] [2024-06-27 20:57:11,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147092654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:11,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:11,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:11,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145355328] [2024-06-27 20:57:11,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:11,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:11,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:11,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:11,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:11,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 205 transitions, 2204 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:11,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:11,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:11,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:12,488 INFO L124 PetriNetUnfolderBase]: 2124/3323 cut-off events. [2024-06-27 20:57:12,489 INFO L125 PetriNetUnfolderBase]: For 88314/88314 co-relation queries the response was YES. [2024-06-27 20:57:12,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22649 conditions, 3323 events. 2124/3323 cut-off events. For 88314/88314 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17847 event pairs, 481 based on Foata normal form. 9/3330 useless extension candidates. Maximal degree in co-relation 22580. Up to 2867 conditions per place. [2024-06-27 20:57:12,515 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 180 selfloop transitions, 68 changer transitions 0/253 dead transitions. [2024-06-27 20:57:12,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 253 transitions, 3152 flow [2024-06-27 20:57:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 20:57:12,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 20:57:12,517 INFO L175 Difference]: Start difference. First operand has 144 places, 205 transitions, 2204 flow. Second operand 7 states and 147 transitions. [2024-06-27 20:57:12,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 253 transitions, 3152 flow [2024-06-27 20:57:12,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 253 transitions, 3032 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:12,644 INFO L231 Difference]: Finished difference. Result has 150 places, 226 transitions, 2620 flow [2024-06-27 20:57:12,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2620, PETRI_PLACES=150, PETRI_TRANSITIONS=226} [2024-06-27 20:57:12,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-27 20:57:12,644 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 226 transitions, 2620 flow [2024-06-27 20:57:12,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:12,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:12,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:12,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:57:12,645 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:12,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash -10230568, now seen corresponding path program 1 times [2024-06-27 20:57:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:12,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709521895] [2024-06-27 20:57:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:12,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:13,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:13,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709521895] [2024-06-27 20:57:13,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709521895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:13,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:13,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:13,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264508428] [2024-06-27 20:57:13,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:13,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:13,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:13,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:13,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:13,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:13,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 226 transitions, 2620 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:13,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:13,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:13,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:13,939 INFO L124 PetriNetUnfolderBase]: 2119/3315 cut-off events. [2024-06-27 20:57:13,940 INFO L125 PetriNetUnfolderBase]: For 95311/95311 co-relation queries the response was YES. [2024-06-27 20:57:13,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23838 conditions, 3315 events. 2119/3315 cut-off events. For 95311/95311 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17751 event pairs, 504 based on Foata normal form. 2/3315 useless extension candidates. Maximal degree in co-relation 23765. Up to 3143 conditions per place. [2024-06-27 20:57:13,969 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 219 selfloop transitions, 13 changer transitions 0/237 dead transitions. [2024-06-27 20:57:13,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 237 transitions, 3146 flow [2024-06-27 20:57:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:57:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:57:13,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 20:57:13,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:57:13,970 INFO L175 Difference]: Start difference. First operand has 150 places, 226 transitions, 2620 flow. Second operand 5 states and 94 transitions. [2024-06-27 20:57:13,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 237 transitions, 3146 flow [2024-06-27 20:57:14,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 237 transitions, 3056 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 20:57:14,141 INFO L231 Difference]: Finished difference. Result has 153 places, 228 transitions, 2597 flow [2024-06-27 20:57:14,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2597, PETRI_PLACES=153, PETRI_TRANSITIONS=228} [2024-06-27 20:57:14,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-27 20:57:14,142 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 228 transitions, 2597 flow [2024-06-27 20:57:14,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:14,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:14,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:14,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:57:14,143 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:14,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash 950997912, now seen corresponding path program 1 times [2024-06-27 20:57:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:14,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773290010] [2024-06-27 20:57:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:14,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:14,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:14,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773290010] [2024-06-27 20:57:14,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773290010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:14,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:14,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:14,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792179574] [2024-06-27 20:57:14,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:14,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:14,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:14,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:14,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:14,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 228 transitions, 2597 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:14,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:14,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:14,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:15,499 INFO L124 PetriNetUnfolderBase]: 2136/3336 cut-off events. [2024-06-27 20:57:15,500 INFO L125 PetriNetUnfolderBase]: For 99446/99446 co-relation queries the response was YES. [2024-06-27 20:57:15,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24076 conditions, 3336 events. 2136/3336 cut-off events. For 99446/99446 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17859 event pairs, 350 based on Foata normal form. 4/3330 useless extension candidates. Maximal degree in co-relation 24001. Up to 3057 conditions per place. [2024-06-27 20:57:15,529 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 227 selfloop transitions, 20 changer transitions 0/252 dead transitions. [2024-06-27 20:57:15,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 252 transitions, 3203 flow [2024-06-27 20:57:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:57:15,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-27 20:57:15,530 INFO L175 Difference]: Start difference. First operand has 153 places, 228 transitions, 2597 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:57:15,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 252 transitions, 3203 flow [2024-06-27 20:57:15,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 252 transitions, 3152 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:15,645 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 2635 flow [2024-06-27 20:57:15,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2635, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-06-27 20:57:15,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 20:57:15,646 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 2635 flow [2024-06-27 20:57:15,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:15,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:15,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:15,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:57:15,646 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:15,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -929147552, now seen corresponding path program 2 times [2024-06-27 20:57:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:15,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365460641] [2024-06-27 20:57:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:15,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:16,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:16,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365460641] [2024-06-27 20:57:16,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365460641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:16,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:16,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907304642] [2024-06-27 20:57:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:16,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:16,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:16,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:16,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 2635 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:16,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:16,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:16,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:17,290 INFO L124 PetriNetUnfolderBase]: 2212/3456 cut-off events. [2024-06-27 20:57:17,291 INFO L125 PetriNetUnfolderBase]: For 107246/107246 co-relation queries the response was YES. [2024-06-27 20:57:17,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25008 conditions, 3456 events. 2212/3456 cut-off events. For 107246/107246 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18642 event pairs, 470 based on Foata normal form. 4/3453 useless extension candidates. Maximal degree in co-relation 24932. Up to 3166 conditions per place. [2024-06-27 20:57:17,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 36 changer transitions 0/273 dead transitions. [2024-06-27 20:57:17,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 273 transitions, 3470 flow [2024-06-27 20:57:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:57:17,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:57:17,320 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 2635 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:57:17,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 273 transitions, 3470 flow [2024-06-27 20:57:17,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 273 transitions, 3391 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:17,454 INFO L231 Difference]: Finished difference. Result has 165 places, 247 transitions, 2887 flow [2024-06-27 20:57:17,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2887, PETRI_PLACES=165, PETRI_TRANSITIONS=247} [2024-06-27 20:57:17,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-27 20:57:17,455 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 247 transitions, 2887 flow [2024-06-27 20:57:17,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:17,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:17,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:17,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:57:17,456 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:17,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:17,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1320864178, now seen corresponding path program 3 times [2024-06-27 20:57:17,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:17,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593825157] [2024-06-27 20:57:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:18,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593825157] [2024-06-27 20:57:18,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593825157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:18,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:18,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:18,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586063531] [2024-06-27 20:57:18,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:18,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:18,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:18,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:18,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:18,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 247 transitions, 2887 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:18,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:18,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:18,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:18,911 INFO L124 PetriNetUnfolderBase]: 2246/3512 cut-off events. [2024-06-27 20:57:18,912 INFO L125 PetriNetUnfolderBase]: For 112577/112577 co-relation queries the response was YES. [2024-06-27 20:57:18,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25801 conditions, 3512 events. 2246/3512 cut-off events. For 112577/112577 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19026 event pairs, 500 based on Foata normal form. 4/3510 useless extension candidates. Maximal degree in co-relation 25720. Up to 3084 conditions per place. [2024-06-27 20:57:18,943 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 42 changer transitions 0/276 dead transitions. [2024-06-27 20:57:18,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 276 transitions, 3598 flow [2024-06-27 20:57:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:57:18,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:57:18,945 INFO L175 Difference]: Start difference. First operand has 165 places, 247 transitions, 2887 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:57:18,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 276 transitions, 3598 flow [2024-06-27 20:57:19,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 276 transitions, 3534 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-27 20:57:19,115 INFO L231 Difference]: Finished difference. Result has 173 places, 252 transitions, 3023 flow [2024-06-27 20:57:19,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3023, PETRI_PLACES=173, PETRI_TRANSITIONS=252} [2024-06-27 20:57:19,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-27 20:57:19,115 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 252 transitions, 3023 flow [2024-06-27 20:57:19,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:19,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:19,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:19,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:57:19,116 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:19,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash 38085740, now seen corresponding path program 1 times [2024-06-27 20:57:19,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:19,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896168879] [2024-06-27 20:57:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:20,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:20,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896168879] [2024-06-27 20:57:20,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896168879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:20,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:20,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:20,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680660944] [2024-06-27 20:57:20,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:20,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:20,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:20,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:20,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:20,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:20,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 252 transitions, 3023 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:20,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:20,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:20,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:21,022 INFO L124 PetriNetUnfolderBase]: 2373/3731 cut-off events. [2024-06-27 20:57:21,023 INFO L125 PetriNetUnfolderBase]: For 133769/133769 co-relation queries the response was YES. [2024-06-27 20:57:21,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28096 conditions, 3731 events. 2373/3731 cut-off events. For 133769/133769 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20656 event pairs, 462 based on Foata normal form. 12/3732 useless extension candidates. Maximal degree in co-relation 28011. Up to 2861 conditions per place. [2024-06-27 20:57:21,060 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 80 changer transitions 0/291 dead transitions. [2024-06-27 20:57:21,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 291 transitions, 3978 flow [2024-06-27 20:57:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:57:21,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 20:57:21,062 INFO L175 Difference]: Start difference. First operand has 173 places, 252 transitions, 3023 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:57:21,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 291 transitions, 3978 flow [2024-06-27 20:57:21,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 291 transitions, 3850 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:21,249 INFO L231 Difference]: Finished difference. Result has 178 places, 254 transitions, 3141 flow [2024-06-27 20:57:21,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3141, PETRI_PLACES=178, PETRI_TRANSITIONS=254} [2024-06-27 20:57:21,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-27 20:57:21,250 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 254 transitions, 3141 flow [2024-06-27 20:57:21,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:21,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:21,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:21,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:57:21,251 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:21,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:21,251 INFO L85 PathProgramCache]: Analyzing trace with hash -46749124, now seen corresponding path program 2 times [2024-06-27 20:57:21,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:21,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247350425] [2024-06-27 20:57:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:21,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:22,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247350425] [2024-06-27 20:57:22,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247350425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:22,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:22,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:22,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434867928] [2024-06-27 20:57:22,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:22,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:22,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:22,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:22,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:22,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 254 transitions, 3141 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:22,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:22,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:22,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:23,060 INFO L124 PetriNetUnfolderBase]: 2362/3718 cut-off events. [2024-06-27 20:57:23,060 INFO L125 PetriNetUnfolderBase]: For 137281/137281 co-relation queries the response was YES. [2024-06-27 20:57:23,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27698 conditions, 3718 events. 2362/3718 cut-off events. For 137281/137281 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20595 event pairs, 534 based on Foata normal form. 16/3728 useless extension candidates. Maximal degree in co-relation 27612. Up to 3244 conditions per place. [2024-06-27 20:57:23,091 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 232 selfloop transitions, 53 changer transitions 0/290 dead transitions. [2024-06-27 20:57:23,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 290 transitions, 3874 flow [2024-06-27 20:57:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:57:23,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:57:23,103 INFO L175 Difference]: Start difference. First operand has 178 places, 254 transitions, 3141 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:57:23,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 290 transitions, 3874 flow [2024-06-27 20:57:23,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 290 transitions, 3748 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:23,332 INFO L231 Difference]: Finished difference. Result has 183 places, 256 transitions, 3150 flow [2024-06-27 20:57:23,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3015, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3150, PETRI_PLACES=183, PETRI_TRANSITIONS=256} [2024-06-27 20:57:23,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 20:57:23,333 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 256 transitions, 3150 flow [2024-06-27 20:57:23,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:23,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:23,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:23,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:57:23,334 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:23,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash 950672362, now seen corresponding path program 1 times [2024-06-27 20:57:23,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:23,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306154100] [2024-06-27 20:57:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:23,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:23,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:23,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306154100] [2024-06-27 20:57:23,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306154100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:23,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:23,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:23,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297890689] [2024-06-27 20:57:23,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:23,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:23,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:23,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:23,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:23,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 256 transitions, 3150 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:23,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:23,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:23,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:24,535 INFO L124 PetriNetUnfolderBase]: 2404/3783 cut-off events. [2024-06-27 20:57:24,535 INFO L125 PetriNetUnfolderBase]: For 136523/136523 co-relation queries the response was YES. [2024-06-27 20:57:24,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28492 conditions, 3783 events. 2404/3783 cut-off events. For 136523/136523 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21048 event pairs, 533 based on Foata normal form. 2/3783 useless extension candidates. Maximal degree in co-relation 28404. Up to 3513 conditions per place. [2024-06-27 20:57:24,566 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 243 selfloop transitions, 37 changer transitions 0/285 dead transitions. [2024-06-27 20:57:24,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 285 transitions, 4033 flow [2024-06-27 20:57:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:57:24,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-27 20:57:24,567 INFO L175 Difference]: Start difference. First operand has 183 places, 256 transitions, 3150 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:57:24,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 285 transitions, 4033 flow [2024-06-27 20:57:24,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 285 transitions, 3910 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:57:24,767 INFO L231 Difference]: Finished difference. Result has 182 places, 265 transitions, 3307 flow [2024-06-27 20:57:24,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3307, PETRI_PLACES=182, PETRI_TRANSITIONS=265} [2024-06-27 20:57:24,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-27 20:57:24,768 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 265 transitions, 3307 flow [2024-06-27 20:57:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:24,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:24,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:24,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:57:24,769 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:24,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:24,769 INFO L85 PathProgramCache]: Analyzing trace with hash -145675990, now seen corresponding path program 2 times [2024-06-27 20:57:24,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:24,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335003925] [2024-06-27 20:57:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:24,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335003925] [2024-06-27 20:57:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335003925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:25,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:25,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890551289] [2024-06-27 20:57:25,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:25,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:25,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:25,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:25,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 265 transitions, 3307 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:25,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:25,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:25,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:26,002 INFO L124 PetriNetUnfolderBase]: 2398/3775 cut-off events. [2024-06-27 20:57:26,002 INFO L125 PetriNetUnfolderBase]: For 141060/141060 co-relation queries the response was YES. [2024-06-27 20:57:26,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28471 conditions, 3775 events. 2398/3775 cut-off events. For 141060/141060 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21033 event pairs, 532 based on Foata normal form. 2/3775 useless extension candidates. Maximal degree in co-relation 28381. Up to 3565 conditions per place. [2024-06-27 20:57:26,034 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 23 changer transitions 0/280 dead transitions. [2024-06-27 20:57:26,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 280 transitions, 3917 flow [2024-06-27 20:57:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:57:26,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-27 20:57:26,035 INFO L175 Difference]: Start difference. First operand has 182 places, 265 transitions, 3307 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:57:26,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 280 transitions, 3917 flow [2024-06-27 20:57:26,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 280 transitions, 3854 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:26,233 INFO L231 Difference]: Finished difference. Result has 186 places, 265 transitions, 3296 flow [2024-06-27 20:57:26,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3244, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3296, PETRI_PLACES=186, PETRI_TRANSITIONS=265} [2024-06-27 20:57:26,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 20:57:26,234 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 265 transitions, 3296 flow [2024-06-27 20:57:26,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:26,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:26,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:26,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:57:26,234 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:26,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1787043718, now seen corresponding path program 3 times [2024-06-27 20:57:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228982137] [2024-06-27 20:57:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228982137] [2024-06-27 20:57:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228982137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:27,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:27,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:27,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230173790] [2024-06-27 20:57:27,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:27,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:27,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:27,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:27,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 265 transitions, 3296 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:27,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:27,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:27,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:27,965 INFO L124 PetriNetUnfolderBase]: 2566/4067 cut-off events. [2024-06-27 20:57:27,965 INFO L125 PetriNetUnfolderBase]: For 164593/164593 co-relation queries the response was YES. [2024-06-27 20:57:27,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30909 conditions, 4067 events. 2566/4067 cut-off events. For 164593/164593 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23225 event pairs, 544 based on Foata normal form. 12/4073 useless extension candidates. Maximal degree in co-relation 30818. Up to 3323 conditions per place. [2024-06-27 20:57:28,004 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 234 selfloop transitions, 70 changer transitions 0/309 dead transitions. [2024-06-27 20:57:28,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 309 transitions, 4302 flow [2024-06-27 20:57:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:57:28,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-27 20:57:28,006 INFO L175 Difference]: Start difference. First operand has 186 places, 265 transitions, 3296 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:57:28,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 309 transitions, 4302 flow [2024-06-27 20:57:28,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 309 transitions, 4232 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:28,248 INFO L231 Difference]: Finished difference. Result has 193 places, 268 transitions, 3469 flow [2024-06-27 20:57:28,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3226, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3469, PETRI_PLACES=193, PETRI_TRANSITIONS=268} [2024-06-27 20:57:28,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-27 20:57:28,249 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 268 transitions, 3469 flow [2024-06-27 20:57:28,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:28,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:28,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:57:28,249 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:28,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1787310628, now seen corresponding path program 4 times [2024-06-27 20:57:28,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:28,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113436833] [2024-06-27 20:57:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:28,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:29,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113436833] [2024-06-27 20:57:29,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113436833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:29,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:29,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:29,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101129213] [2024-06-27 20:57:29,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:29,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:29,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:29,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:29,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 268 transitions, 3469 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:29,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:29,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:29,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:30,334 INFO L124 PetriNetUnfolderBase]: 2538/4022 cut-off events. [2024-06-27 20:57:30,335 INFO L125 PetriNetUnfolderBase]: For 169655/169655 co-relation queries the response was YES. [2024-06-27 20:57:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30612 conditions, 4022 events. 2538/4022 cut-off events. For 169655/169655 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22966 event pairs, 562 based on Foata normal form. 16/4032 useless extension candidates. Maximal degree in co-relation 30519. Up to 3530 conditions per place. [2024-06-27 20:57:30,373 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 249 selfloop transitions, 49 changer transitions 0/303 dead transitions. [2024-06-27 20:57:30,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 303 transitions, 4220 flow [2024-06-27 20:57:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:57:30,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:57:30,375 INFO L175 Difference]: Start difference. First operand has 193 places, 268 transitions, 3469 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:57:30,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 303 transitions, 4220 flow [2024-06-27 20:57:30,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 303 transitions, 4101 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:30,651 INFO L231 Difference]: Finished difference. Result has 197 places, 269 transitions, 3468 flow [2024-06-27 20:57:30,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3468, PETRI_PLACES=197, PETRI_TRANSITIONS=269} [2024-06-27 20:57:30,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 20:57:30,652 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 269 transitions, 3468 flow [2024-06-27 20:57:30,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:30,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:30,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:30,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:57:30,652 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:30,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1225183110, now seen corresponding path program 5 times [2024-06-27 20:57:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:30,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374252673] [2024-06-27 20:57:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:31,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374252673] [2024-06-27 20:57:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374252673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:31,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705590863] [2024-06-27 20:57:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:31,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:31,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:31,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 269 transitions, 3468 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:31,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:31,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:31,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:32,424 INFO L124 PetriNetUnfolderBase]: 2681/4273 cut-off events. [2024-06-27 20:57:32,425 INFO L125 PetriNetUnfolderBase]: For 180321/180321 co-relation queries the response was YES. [2024-06-27 20:57:32,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32569 conditions, 4273 events. 2681/4273 cut-off events. For 180321/180321 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24877 event pairs, 528 based on Foata normal form. 12/4274 useless extension candidates. Maximal degree in co-relation 32474. Up to 2940 conditions per place. [2024-06-27 20:57:32,469 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 215 selfloop transitions, 88 changer transitions 0/308 dead transitions. [2024-06-27 20:57:32,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 308 transitions, 4466 flow [2024-06-27 20:57:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:57:32,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 20:57:32,470 INFO L175 Difference]: Start difference. First operand has 197 places, 269 transitions, 3468 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:57:32,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 308 transitions, 4466 flow [2024-06-27 20:57:32,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 308 transitions, 4371 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:57:32,742 INFO L231 Difference]: Finished difference. Result has 199 places, 272 transitions, 3673 flow [2024-06-27 20:57:32,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3673, PETRI_PLACES=199, PETRI_TRANSITIONS=272} [2024-06-27 20:57:32,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-27 20:57:32,743 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 272 transitions, 3673 flow [2024-06-27 20:57:32,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:32,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:32,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:57:32,743 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:32,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1538882340, now seen corresponding path program 6 times [2024-06-27 20:57:32,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:32,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950576830] [2024-06-27 20:57:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:33,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:33,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950576830] [2024-06-27 20:57:33,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950576830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:33,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:33,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395830851] [2024-06-27 20:57:33,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:33,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:33,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:33,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:33,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 272 transitions, 3673 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:33,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:33,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:33,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:34,467 INFO L124 PetriNetUnfolderBase]: 2722/4344 cut-off events. [2024-06-27 20:57:34,467 INFO L125 PetriNetUnfolderBase]: For 192015/192015 co-relation queries the response was YES. [2024-06-27 20:57:34,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33696 conditions, 4344 events. 2722/4344 cut-off events. For 192015/192015 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25426 event pairs, 588 based on Foata normal form. 12/4345 useless extension candidates. Maximal degree in co-relation 33599. Up to 3614 conditions per place. [2024-06-27 20:57:34,513 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 79 changer transitions 0/308 dead transitions. [2024-06-27 20:57:34,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 308 transitions, 4624 flow [2024-06-27 20:57:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:57:34,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 20:57:34,515 INFO L175 Difference]: Start difference. First operand has 199 places, 272 transitions, 3673 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:57:34,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 308 transitions, 4624 flow [2024-06-27 20:57:34,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 308 transitions, 4505 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:34,837 INFO L231 Difference]: Finished difference. Result has 203 places, 273 transitions, 3757 flow [2024-06-27 20:57:34,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3554, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3757, PETRI_PLACES=203, PETRI_TRANSITIONS=273} [2024-06-27 20:57:34,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-27 20:57:34,838 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 273 transitions, 3757 flow [2024-06-27 20:57:34,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:34,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:34,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:57:34,839 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:34,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1539149250, now seen corresponding path program 7 times [2024-06-27 20:57:34,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:34,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284275628] [2024-06-27 20:57:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:34,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:35,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:35,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284275628] [2024-06-27 20:57:35,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284275628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:35,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:35,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:35,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163955550] [2024-06-27 20:57:35,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:35,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:35,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:35,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:35,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:35,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:35,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 273 transitions, 3757 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:35,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:35,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:35,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:36,802 INFO L124 PetriNetUnfolderBase]: 2694/4304 cut-off events. [2024-06-27 20:57:36,802 INFO L125 PetriNetUnfolderBase]: For 193813/193813 co-relation queries the response was YES. [2024-06-27 20:57:36,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33107 conditions, 4304 events. 2694/4304 cut-off events. For 193813/193813 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 25184 event pairs, 605 based on Foata normal form. 16/4314 useless extension candidates. Maximal degree in co-relation 33008. Up to 3651 conditions per place. [2024-06-27 20:57:36,848 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 241 selfloop transitions, 65 changer transitions 0/311 dead transitions. [2024-06-27 20:57:36,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 311 transitions, 4531 flow [2024-06-27 20:57:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:57:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:57:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:57:36,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656319290465632 [2024-06-27 20:57:36,865 INFO L175 Difference]: Start difference. First operand has 203 places, 273 transitions, 3757 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:57:36,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 311 transitions, 4531 flow [2024-06-27 20:57:37,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 311 transitions, 4287 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:37,279 INFO L231 Difference]: Finished difference. Result has 207 places, 273 transitions, 3657 flow [2024-06-27 20:57:37,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3657, PETRI_PLACES=207, PETRI_TRANSITIONS=273} [2024-06-27 20:57:37,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 20:57:37,279 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 273 transitions, 3657 flow [2024-06-27 20:57:37,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:37,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:37,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:37,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:57:37,280 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:37,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:37,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1381597456, now seen corresponding path program 3 times [2024-06-27 20:57:37,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:37,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067268757] [2024-06-27 20:57:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:37,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:37,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067268757] [2024-06-27 20:57:37,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067268757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:37,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:37,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384758590] [2024-06-27 20:57:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:37,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:37,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 273 transitions, 3657 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:37,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:37,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:37,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:38,592 INFO L124 PetriNetUnfolderBase]: 2698/4324 cut-off events. [2024-06-27 20:57:38,593 INFO L125 PetriNetUnfolderBase]: For 187194/187194 co-relation queries the response was YES. [2024-06-27 20:57:38,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32817 conditions, 4324 events. 2698/4324 cut-off events. For 187194/187194 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 25446 event pairs, 614 based on Foata normal form. 4/4322 useless extension candidates. Maximal degree in co-relation 32719. Up to 3792 conditions per place. [2024-06-27 20:57:38,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 72 changer transitions 0/300 dead transitions. [2024-06-27 20:57:38,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 300 transitions, 4598 flow [2024-06-27 20:57:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:57:38,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-27 20:57:38,639 INFO L175 Difference]: Start difference. First operand has 207 places, 273 transitions, 3657 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:57:38,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 300 transitions, 4598 flow [2024-06-27 20:57:38,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 300 transitions, 4476 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 20:57:38,959 INFO L231 Difference]: Finished difference. Result has 206 places, 280 transitions, 3821 flow [2024-06-27 20:57:38,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3821, PETRI_PLACES=206, PETRI_TRANSITIONS=280} [2024-06-27 20:57:38,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 20:57:38,959 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 280 transitions, 3821 flow [2024-06-27 20:57:38,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:38,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:38,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:38,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:57:38,960 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:38,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:38,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1972279594, now seen corresponding path program 4 times [2024-06-27 20:57:38,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:38,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152436418] [2024-06-27 20:57:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:38,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:39,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:39,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152436418] [2024-06-27 20:57:39,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152436418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:39,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:39,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977907217] [2024-06-27 20:57:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:39,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:39,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:39,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:39,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 280 transitions, 3821 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:39,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:39,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:40,445 INFO L124 PetriNetUnfolderBase]: 2650/4257 cut-off events. [2024-06-27 20:57:40,445 INFO L125 PetriNetUnfolderBase]: For 191338/191338 co-relation queries the response was YES. [2024-06-27 20:57:40,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32262 conditions, 4257 events. 2650/4257 cut-off events. For 191338/191338 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25129 event pairs, 745 based on Foata normal form. 12/4267 useless extension candidates. Maximal degree in co-relation 32162. Up to 3932 conditions per place. [2024-06-27 20:57:40,489 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 254 selfloop transitions, 40 changer transitions 0/299 dead transitions. [2024-06-27 20:57:40,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 299 transitions, 4505 flow [2024-06-27 20:57:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:57:40,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:57:40,495 INFO L175 Difference]: Start difference. First operand has 206 places, 280 transitions, 3821 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:57:40,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 299 transitions, 4505 flow [2024-06-27 20:57:40,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 299 transitions, 4333 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:40,892 INFO L231 Difference]: Finished difference. Result has 211 places, 280 transitions, 3743 flow [2024-06-27 20:57:40,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3649, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3743, PETRI_PLACES=211, PETRI_TRANSITIONS=280} [2024-06-27 20:57:40,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-27 20:57:40,893 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 280 transitions, 3743 flow [2024-06-27 20:57:40,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:40,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:40,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:57:40,893 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:40,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:40,893 INFO L85 PathProgramCache]: Analyzing trace with hash -324789364, now seen corresponding path program 5 times [2024-06-27 20:57:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687808505] [2024-06-27 20:57:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:41,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:41,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687808505] [2024-06-27 20:57:41,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687808505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:41,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:41,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:41,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926090146] [2024-06-27 20:57:41,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:41,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:41,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:41,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:41,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:41,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:41,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 280 transitions, 3743 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:41,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:41,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:41,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:42,282 INFO L124 PetriNetUnfolderBase]: 2646/4261 cut-off events. [2024-06-27 20:57:42,283 INFO L125 PetriNetUnfolderBase]: For 190841/190841 co-relation queries the response was YES. [2024-06-27 20:57:42,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31785 conditions, 4261 events. 2646/4261 cut-off events. For 190841/190841 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25172 event pairs, 589 based on Foata normal form. 12/4271 useless extension candidates. Maximal degree in co-relation 31684. Up to 3735 conditions per place. [2024-06-27 20:57:42,321 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 234 selfloop transitions, 70 changer transitions 0/309 dead transitions. [2024-06-27 20:57:42,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 309 transitions, 4618 flow [2024-06-27 20:57:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 20:57:42,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 20:57:42,322 INFO L175 Difference]: Start difference. First operand has 211 places, 280 transitions, 3743 flow. Second operand 7 states and 147 transitions. [2024-06-27 20:57:42,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 309 transitions, 4618 flow [2024-06-27 20:57:42,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 309 transitions, 4536 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:42,675 INFO L231 Difference]: Finished difference. Result has 212 places, 284 transitions, 3939 flow [2024-06-27 20:57:42,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3939, PETRI_PLACES=212, PETRI_TRANSITIONS=284} [2024-06-27 20:57:42,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 20:57:42,676 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 284 transitions, 3939 flow [2024-06-27 20:57:42,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:42,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:42,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:42,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:57:42,676 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:42,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash -855409718, now seen corresponding path program 6 times [2024-06-27 20:57:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:42,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788837869] [2024-06-27 20:57:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:42,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:43,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788837869] [2024-06-27 20:57:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788837869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:43,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:43,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:43,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125554186] [2024-06-27 20:57:43,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:43,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:43,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:43,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 284 transitions, 3939 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:43,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:43,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:43,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:44,025 INFO L124 PetriNetUnfolderBase]: 2616/4219 cut-off events. [2024-06-27 20:57:44,025 INFO L125 PetriNetUnfolderBase]: For 188960/188960 co-relation queries the response was YES. [2024-06-27 20:57:44,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31704 conditions, 4219 events. 2616/4219 cut-off events. For 188960/188960 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24962 event pairs, 587 based on Foata normal form. 6/4223 useless extension candidates. Maximal degree in co-relation 31601. Up to 3920 conditions per place. [2024-06-27 20:57:44,071 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 259 selfloop transitions, 38 changer transitions 0/302 dead transitions. [2024-06-27 20:57:44,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 302 transitions, 4609 flow [2024-06-27 20:57:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:57:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:57:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 20:57:44,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-27 20:57:44,072 INFO L175 Difference]: Start difference. First operand has 212 places, 284 transitions, 3939 flow. Second operand 6 states and 122 transitions. [2024-06-27 20:57:44,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 302 transitions, 4609 flow [2024-06-27 20:57:44,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 302 transitions, 4452 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:44,501 INFO L231 Difference]: Finished difference. Result has 214 places, 284 transitions, 3880 flow [2024-06-27 20:57:44,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3782, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3880, PETRI_PLACES=214, PETRI_TRANSITIONS=284} [2024-06-27 20:57:44,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 20:57:44,501 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 284 transitions, 3880 flow [2024-06-27 20:57:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:44,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:44,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:44,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:57:44,502 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:44,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:44,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1883407442, now seen corresponding path program 4 times [2024-06-27 20:57:44,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:44,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195295745] [2024-06-27 20:57:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:44,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195295745] [2024-06-27 20:57:45,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195295745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:45,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:45,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:45,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214983850] [2024-06-27 20:57:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:45,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:45,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:45,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 284 transitions, 3880 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:45,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:45,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:45,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:46,187 INFO L124 PetriNetUnfolderBase]: 2608/4200 cut-off events. [2024-06-27 20:57:46,187 INFO L125 PetriNetUnfolderBase]: For 189214/189214 co-relation queries the response was YES. [2024-06-27 20:57:46,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31345 conditions, 4200 events. 2608/4200 cut-off events. For 189214/189214 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24816 event pairs, 534 based on Foata normal form. 4/4193 useless extension candidates. Maximal degree in co-relation 31241. Up to 3518 conditions per place. [2024-06-27 20:57:46,235 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 230 selfloop transitions, 73 changer transitions 0/308 dead transitions. [2024-06-27 20:57:46,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 4642 flow [2024-06-27 20:57:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:57:46,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 20:57:46,237 INFO L175 Difference]: Start difference. First operand has 214 places, 284 transitions, 3880 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:57:46,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 4642 flow [2024-06-27 20:57:46,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 308 transitions, 4576 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:46,693 INFO L231 Difference]: Finished difference. Result has 218 places, 288 transitions, 4097 flow [2024-06-27 20:57:46,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3814, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4097, PETRI_PLACES=218, PETRI_TRANSITIONS=288} [2024-06-27 20:57:46,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-27 20:57:46,694 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 288 transitions, 4097 flow [2024-06-27 20:57:46,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:46,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:46,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:46,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:57:46,695 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:46,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash -986270204, now seen corresponding path program 1 times [2024-06-27 20:57:46,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:46,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148209363] [2024-06-27 20:57:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:46,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:47,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:47,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148209363] [2024-06-27 20:57:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148209363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:47,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:47,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:47,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470346102] [2024-06-27 20:57:47,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:47,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:47,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:47,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:47,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 288 transitions, 4097 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:47,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:47,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:47,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:48,344 INFO L124 PetriNetUnfolderBase]: 2639/4245 cut-off events. [2024-06-27 20:57:48,345 INFO L125 PetriNetUnfolderBase]: For 202595/202595 co-relation queries the response was YES. [2024-06-27 20:57:48,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32359 conditions, 4245 events. 2639/4245 cut-off events. For 202595/202595 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24993 event pairs, 579 based on Foata normal form. 3/4242 useless extension candidates. Maximal degree in co-relation 32253. Up to 3663 conditions per place. [2024-06-27 20:57:48,390 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 222 selfloop transitions, 97 changer transitions 0/324 dead transitions. [2024-06-27 20:57:48,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 324 transitions, 5295 flow [2024-06-27 20:57:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:57:48,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-27 20:57:48,391 INFO L175 Difference]: Start difference. First operand has 218 places, 288 transitions, 4097 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:57:48,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 324 transitions, 5295 flow [2024-06-27 20:57:48,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 324 transitions, 5146 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:48,956 INFO L231 Difference]: Finished difference. Result has 225 places, 298 transitions, 4358 flow [2024-06-27 20:57:48,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4358, PETRI_PLACES=225, PETRI_TRANSITIONS=298} [2024-06-27 20:57:48,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 20:57:48,957 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 298 transitions, 4358 flow [2024-06-27 20:57:48,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:48,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:48,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:48,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:57:48,957 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:48,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:48,958 INFO L85 PathProgramCache]: Analyzing trace with hash -986179839, now seen corresponding path program 1 times [2024-06-27 20:57:48,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:48,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609435946] [2024-06-27 20:57:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:48,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:49,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:49,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609435946] [2024-06-27 20:57:49,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609435946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:49,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:49,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:49,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658594237] [2024-06-27 20:57:49,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:49,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:49,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:49,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:49,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:49,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 298 transitions, 4358 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:49,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:49,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:49,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:50,384 INFO L124 PetriNetUnfolderBase]: 2757/4410 cut-off events. [2024-06-27 20:57:50,384 INFO L125 PetriNetUnfolderBase]: For 213543/213543 co-relation queries the response was YES. [2024-06-27 20:57:50,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34893 conditions, 4410 events. 2757/4410 cut-off events. For 213543/213543 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25993 event pairs, 568 based on Foata normal form. 6/4410 useless extension candidates. Maximal degree in co-relation 34784. Up to 3542 conditions per place. [2024-06-27 20:57:50,432 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 223 selfloop transitions, 111 changer transitions 0/339 dead transitions. [2024-06-27 20:57:50,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 339 transitions, 5640 flow [2024-06-27 20:57:50,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:57:50,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 20:57:50,433 INFO L175 Difference]: Start difference. First operand has 225 places, 298 transitions, 4358 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:57:50,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 339 transitions, 5640 flow [2024-06-27 20:57:50,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 339 transitions, 5431 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:50,756 INFO L231 Difference]: Finished difference. Result has 230 places, 314 transitions, 4767 flow [2024-06-27 20:57:50,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4767, PETRI_PLACES=230, PETRI_TRANSITIONS=314} [2024-06-27 20:57:50,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 20:57:50,757 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 314 transitions, 4767 flow [2024-06-27 20:57:50,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:50,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:50,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:50,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:57:50,758 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:50,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:50,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1972288522, now seen corresponding path program 2 times [2024-06-27 20:57:50,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:50,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431005422] [2024-06-27 20:57:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:50,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431005422] [2024-06-27 20:57:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431005422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:51,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:51,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:51,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375439586] [2024-06-27 20:57:51,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:51,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:51,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:51,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:51,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:51,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:51,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 314 transitions, 4767 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:51,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:51,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:51,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:52,778 INFO L124 PetriNetUnfolderBase]: 2787/4459 cut-off events. [2024-06-27 20:57:52,778 INFO L125 PetriNetUnfolderBase]: For 229682/229682 co-relation queries the response was YES. [2024-06-27 20:57:52,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36745 conditions, 4459 events. 2787/4459 cut-off events. For 229682/229682 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26378 event pairs, 726 based on Foata normal form. 6/4463 useless extension candidates. Maximal degree in co-relation 36632. Up to 4132 conditions per place. [2024-06-27 20:57:52,829 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 300 selfloop transitions, 53 changer transitions 0/358 dead transitions. [2024-06-27 20:57:52,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 358 transitions, 6005 flow [2024-06-27 20:57:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:57:52,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-27 20:57:52,831 INFO L175 Difference]: Start difference. First operand has 230 places, 314 transitions, 4767 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:57:52,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 358 transitions, 6005 flow [2024-06-27 20:57:53,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 358 transitions, 5874 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-27 20:57:53,352 INFO L231 Difference]: Finished difference. Result has 241 places, 337 transitions, 5186 flow [2024-06-27 20:57:53,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4650, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5186, PETRI_PLACES=241, PETRI_TRANSITIONS=337} [2024-06-27 20:57:53,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 20:57:53,352 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 337 transitions, 5186 flow [2024-06-27 20:57:53,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:53,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:53,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:53,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:57:53,353 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:53,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1972288677, now seen corresponding path program 2 times [2024-06-27 20:57:53,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:53,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116922363] [2024-06-27 20:57:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:53,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:53,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:53,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116922363] [2024-06-27 20:57:53,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116922363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:53,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:53,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992920314] [2024-06-27 20:57:53,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:53,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:53,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:53,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:53,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 337 transitions, 5186 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:53,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:53,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:53,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:54,950 INFO L124 PetriNetUnfolderBase]: 2913/4641 cut-off events. [2024-06-27 20:57:54,950 INFO L125 PetriNetUnfolderBase]: For 249798/249798 co-relation queries the response was YES. [2024-06-27 20:57:54,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38843 conditions, 4641 events. 2913/4641 cut-off events. For 249798/249798 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27571 event pairs, 736 based on Foata normal form. 6/4645 useless extension candidates. Maximal degree in co-relation 38724. Up to 4190 conditions per place. [2024-06-27 20:57:55,005 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 307 selfloop transitions, 60 changer transitions 0/372 dead transitions. [2024-06-27 20:57:55,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 372 transitions, 6497 flow [2024-06-27 20:57:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:57:55,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:57:55,010 INFO L175 Difference]: Start difference. First operand has 241 places, 337 transitions, 5186 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:57:55,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 372 transitions, 6497 flow [2024-06-27 20:57:55,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 372 transitions, 6327 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:55,562 INFO L231 Difference]: Finished difference. Result has 247 places, 348 transitions, 5412 flow [2024-06-27 20:57:55,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5016, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5412, PETRI_PLACES=247, PETRI_TRANSITIONS=348} [2024-06-27 20:57:55,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-27 20:57:55,563 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 348 transitions, 5412 flow [2024-06-27 20:57:55,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:55,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:55,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:55,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:57:55,564 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:55,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:55,564 INFO L85 PathProgramCache]: Analyzing trace with hash -397058517, now seen corresponding path program 3 times [2024-06-27 20:57:55,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:55,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536761468] [2024-06-27 20:57:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:55,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:56,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536761468] [2024-06-27 20:57:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536761468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:56,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:56,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129757352] [2024-06-27 20:57:56,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:56,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:56,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:56,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 348 transitions, 5412 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:56,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:56,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:56,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:57,253 INFO L124 PetriNetUnfolderBase]: 3015/4809 cut-off events. [2024-06-27 20:57:57,254 INFO L125 PetriNetUnfolderBase]: For 267977/267977 co-relation queries the response was YES. [2024-06-27 20:57:57,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40951 conditions, 4809 events. 3015/4809 cut-off events. For 267977/267977 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 28836 event pairs, 763 based on Foata normal form. 6/4813 useless extension candidates. Maximal degree in co-relation 40830. Up to 4377 conditions per place. [2024-06-27 20:57:57,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 47 changer transitions 0/378 dead transitions. [2024-06-27 20:57:57,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 378 transitions, 6581 flow [2024-06-27 20:57:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:57:57,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:57:57,310 INFO L175 Difference]: Start difference. First operand has 247 places, 348 transitions, 5412 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:57:57,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 378 transitions, 6581 flow [2024-06-27 20:57:57,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 378 transitions, 6429 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:57,825 INFO L231 Difference]: Finished difference. Result has 252 places, 356 transitions, 5597 flow [2024-06-27 20:57:57,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5597, PETRI_PLACES=252, PETRI_TRANSITIONS=356} [2024-06-27 20:57:57,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 20:57:57,826 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 356 transitions, 5597 flow [2024-06-27 20:57:57,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:57,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:57,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:57,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:57:57,826 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:57,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash -317155924, now seen corresponding path program 1 times [2024-06-27 20:57:57,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:57,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507142697] [2024-06-27 20:57:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:57,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:58,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507142697] [2024-06-27 20:57:58,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507142697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:58,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:58,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:58,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359468137] [2024-06-27 20:57:58,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:58,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:58,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:58,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:57:58,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 356 transitions, 5597 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:58,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:58,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:57:58,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:59,563 INFO L124 PetriNetUnfolderBase]: 3012/4801 cut-off events. [2024-06-27 20:57:59,563 INFO L125 PetriNetUnfolderBase]: For 269024/269024 co-relation queries the response was YES. [2024-06-27 20:57:59,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40889 conditions, 4801 events. 3012/4801 cut-off events. For 269024/269024 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 28809 event pairs, 769 based on Foata normal form. 1/4800 useless extension candidates. Maximal degree in co-relation 40765. Up to 4511 conditions per place. [2024-06-27 20:57:59,616 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 333 selfloop transitions, 29 changer transitions 0/367 dead transitions. [2024-06-27 20:57:59,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 367 transitions, 6361 flow [2024-06-27 20:57:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:57:59,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:57:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-27 20:57:59,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-27 20:57:59,617 INFO L175 Difference]: Start difference. First operand has 252 places, 356 transitions, 5597 flow. Second operand 5 states and 100 transitions. [2024-06-27 20:57:59,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 367 transitions, 6361 flow [2024-06-27 20:58:00,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 367 transitions, 6087 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:00,318 INFO L231 Difference]: Finished difference. Result has 251 places, 356 transitions, 5405 flow [2024-06-27 20:58:00,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5323, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5405, PETRI_PLACES=251, PETRI_TRANSITIONS=356} [2024-06-27 20:58:00,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-27 20:58:00,319 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 356 transitions, 5405 flow [2024-06-27 20:58:00,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:00,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:00,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:00,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:58:00,320 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:00,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash -397064252, now seen corresponding path program 3 times [2024-06-27 20:58:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:00,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464439900] [2024-06-27 20:58:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:00,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:01,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:01,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464439900] [2024-06-27 20:58:01,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464439900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:01,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:01,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:01,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904515049] [2024-06-27 20:58:01,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:01,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:01,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:01,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:01,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:01,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:01,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 356 transitions, 5405 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:01,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:01,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:01,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:02,293 INFO L124 PetriNetUnfolderBase]: 3062/4872 cut-off events. [2024-06-27 20:58:02,293 INFO L125 PetriNetUnfolderBase]: For 283609/283609 co-relation queries the response was YES. [2024-06-27 20:58:02,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40986 conditions, 4872 events. 3062/4872 cut-off events. For 283609/283609 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29117 event pairs, 632 based on Foata normal form. 6/4876 useless extension candidates. Maximal degree in co-relation 40864. Up to 4376 conditions per place. [2024-06-27 20:58:02,350 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 329 selfloop transitions, 84 changer transitions 0/418 dead transitions. [2024-06-27 20:58:02,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 418 transitions, 7056 flow [2024-06-27 20:58:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:58:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:58:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:58:02,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932249322493225 [2024-06-27 20:58:02,352 INFO L175 Difference]: Start difference. First operand has 251 places, 356 transitions, 5405 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:58:02,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 418 transitions, 7056 flow [2024-06-27 20:58:02,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 418 transitions, 6998 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:58:02,991 INFO L231 Difference]: Finished difference. Result has 259 places, 388 transitions, 6191 flow [2024-06-27 20:58:02,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5347, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6191, PETRI_PLACES=259, PETRI_TRANSITIONS=388} [2024-06-27 20:58:02,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 20:58:02,992 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 388 transitions, 6191 flow [2024-06-27 20:58:02,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:02,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:02,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:02,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:58:02,993 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:02,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash -324780281, now seen corresponding path program 4 times [2024-06-27 20:58:02,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:02,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014058907] [2024-06-27 20:58:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:02,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:03,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014058907] [2024-06-27 20:58:03,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014058907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:03,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:03,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147514632] [2024-06-27 20:58:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:03,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:03,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:03,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:03,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 388 transitions, 6191 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:03,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:03,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:03,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:04,758 INFO L124 PetriNetUnfolderBase]: 3172/5023 cut-off events. [2024-06-27 20:58:04,759 INFO L125 PetriNetUnfolderBase]: For 316435/316435 co-relation queries the response was YES. [2024-06-27 20:58:04,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44446 conditions, 5023 events. 3172/5023 cut-off events. For 316435/316435 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30098 event pairs, 629 based on Foata normal form. 6/5027 useless extension candidates. Maximal degree in co-relation 44320. Up to 4280 conditions per place. [2024-06-27 20:58:04,930 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 318 selfloop transitions, 108 changer transitions 0/431 dead transitions. [2024-06-27 20:58:04,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 431 transitions, 7737 flow [2024-06-27 20:58:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 20:58:04,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-27 20:58:04,931 INFO L175 Difference]: Start difference. First operand has 259 places, 388 transitions, 6191 flow. Second operand 8 states and 165 transitions. [2024-06-27 20:58:04,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 431 transitions, 7737 flow [2024-06-27 20:58:05,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 431 transitions, 7595 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-27 20:58:05,690 INFO L231 Difference]: Finished difference. Result has 266 places, 400 transitions, 6650 flow [2024-06-27 20:58:05,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6059, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6650, PETRI_PLACES=266, PETRI_TRANSITIONS=400} [2024-06-27 20:58:05,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-27 20:58:05,691 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 400 transitions, 6650 flow [2024-06-27 20:58:05,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:05,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:05,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:05,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:58:05,692 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:05,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1905992524, now seen corresponding path program 1 times [2024-06-27 20:58:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:05,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554575784] [2024-06-27 20:58:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:06,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:06,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554575784] [2024-06-27 20:58:06,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554575784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:06,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:06,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:06,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508840885] [2024-06-27 20:58:06,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:06,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:06,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:06,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:06,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 400 transitions, 6650 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:06,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:06,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:08,142 INFO L124 PetriNetUnfolderBase]: 3213/5107 cut-off events. [2024-06-27 20:58:08,142 INFO L125 PetriNetUnfolderBase]: For 330385/330385 co-relation queries the response was YES. [2024-06-27 20:58:08,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45677 conditions, 5107 events. 3213/5107 cut-off events. For 330385/330385 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 30823 event pairs, 672 based on Foata normal form. 12/5113 useless extension candidates. Maximal degree in co-relation 45547. Up to 4495 conditions per place. [2024-06-27 20:58:08,221 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 381 selfloop transitions, 46 changer transitions 0/432 dead transitions. [2024-06-27 20:58:08,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 432 transitions, 7654 flow [2024-06-27 20:58:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:58:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:58:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:58:08,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 20:58:08,222 INFO L175 Difference]: Start difference. First operand has 266 places, 400 transitions, 6650 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:58:08,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 432 transitions, 7654 flow [2024-06-27 20:58:09,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 432 transitions, 7518 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-27 20:58:09,158 INFO L231 Difference]: Finished difference. Result has 273 places, 401 transitions, 6648 flow [2024-06-27 20:58:09,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6514, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6648, PETRI_PLACES=273, PETRI_TRANSITIONS=401} [2024-06-27 20:58:09,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-27 20:58:09,159 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 401 transitions, 6648 flow [2024-06-27 20:58:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:09,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:09,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:09,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:58:09,160 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:09,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash 616945648, now seen corresponding path program 2 times [2024-06-27 20:58:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539699941] [2024-06-27 20:58:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:10,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:10,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539699941] [2024-06-27 20:58:10,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539699941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:10,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:10,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:10,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26660807] [2024-06-27 20:58:10,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:10,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:10,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:10,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:10,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:10,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 401 transitions, 6648 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:10,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:10,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:10,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:11,534 INFO L124 PetriNetUnfolderBase]: 3254/5176 cut-off events. [2024-06-27 20:58:11,534 INFO L125 PetriNetUnfolderBase]: For 341208/341208 co-relation queries the response was YES. [2024-06-27 20:58:11,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46117 conditions, 5176 events. 3254/5176 cut-off events. For 341208/341208 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31408 event pairs, 628 based on Foata normal form. 12/5177 useless extension candidates. Maximal degree in co-relation 45985. Up to 4294 conditions per place. [2024-06-27 20:58:11,596 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 349 selfloop transitions, 75 changer transitions 0/429 dead transitions. [2024-06-27 20:58:11,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 429 transitions, 7634 flow [2024-06-27 20:58:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:58:11,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:58:11,598 INFO L175 Difference]: Start difference. First operand has 273 places, 401 transitions, 6648 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:58:11,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 429 transitions, 7634 flow [2024-06-27 20:58:12,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 429 transitions, 7536 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:12,358 INFO L231 Difference]: Finished difference. Result has 275 places, 402 transitions, 6747 flow [2024-06-27 20:58:12,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6550, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6747, PETRI_PLACES=275, PETRI_TRANSITIONS=402} [2024-06-27 20:58:12,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-27 20:58:12,359 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 402 transitions, 6747 flow [2024-06-27 20:58:12,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:12,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:12,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:12,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:58:12,359 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:12,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash 940886768, now seen corresponding path program 3 times [2024-06-27 20:58:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182945203] [2024-06-27 20:58:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:13,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:13,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182945203] [2024-06-27 20:58:13,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182945203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:13,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:13,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:13,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438324409] [2024-06-27 20:58:13,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:13,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:13,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:13,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:13,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 402 transitions, 6747 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:13,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:13,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:13,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:14,891 INFO L124 PetriNetUnfolderBase]: 3234/5144 cut-off events. [2024-06-27 20:58:14,891 INFO L125 PetriNetUnfolderBase]: For 341381/341381 co-relation queries the response was YES. [2024-06-27 20:58:14,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45661 conditions, 5144 events. 3234/5144 cut-off events. For 341381/341381 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31085 event pairs, 514 based on Foata normal form. 12/5145 useless extension candidates. Maximal degree in co-relation 45528. Up to 4686 conditions per place. [2024-06-27 20:58:14,951 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 399 selfloop transitions, 25 changer transitions 0/429 dead transitions. [2024-06-27 20:58:14,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 429 transitions, 7633 flow [2024-06-27 20:58:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:58:14,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:58:14,953 INFO L175 Difference]: Start difference. First operand has 275 places, 402 transitions, 6747 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:58:14,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 429 transitions, 7633 flow [2024-06-27 20:58:15,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 429 transitions, 7403 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 20:58:15,808 INFO L231 Difference]: Finished difference. Result has 274 places, 401 transitions, 6505 flow [2024-06-27 20:58:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6451, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6505, PETRI_PLACES=274, PETRI_TRANSITIONS=401} [2024-06-27 20:58:15,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-27 20:58:15,809 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 401 transitions, 6505 flow [2024-06-27 20:58:15,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:15,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:15,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:15,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:58:15,809 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:15,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1185917457, now seen corresponding path program 1 times [2024-06-27 20:58:15,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:15,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049474759] [2024-06-27 20:58:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:16,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:16,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049474759] [2024-06-27 20:58:16,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049474759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:16,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:16,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153701479] [2024-06-27 20:58:16,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:16,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:16,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:16,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:16,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 401 transitions, 6505 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:16,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:16,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:16,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:17,649 INFO L124 PetriNetUnfolderBase]: 3244/5165 cut-off events. [2024-06-27 20:58:17,649 INFO L125 PetriNetUnfolderBase]: For 290542/290542 co-relation queries the response was YES. [2024-06-27 20:58:17,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44277 conditions, 5165 events. 3244/5165 cut-off events. For 290542/290542 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31321 event pairs, 684 based on Foata normal form. 2/5165 useless extension candidates. Maximal degree in co-relation 44145. Up to 4803 conditions per place. [2024-06-27 20:58:17,718 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 42 changer transitions 0/426 dead transitions. [2024-06-27 20:58:17,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 426 transitions, 7562 flow [2024-06-27 20:58:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:58:17,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:58:17,719 INFO L175 Difference]: Start difference. First operand has 274 places, 401 transitions, 6505 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:58:17,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 426 transitions, 7562 flow [2024-06-27 20:58:18,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 426 transitions, 7371 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:58:18,636 INFO L231 Difference]: Finished difference. Result has 274 places, 404 transitions, 6466 flow [2024-06-27 20:58:18,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6314, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6466, PETRI_PLACES=274, PETRI_TRANSITIONS=404} [2024-06-27 20:58:18,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-27 20:58:18,637 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 404 transitions, 6466 flow [2024-06-27 20:58:18,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:18,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:18,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:18,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:58:18,637 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:18,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -227415973, now seen corresponding path program 1 times [2024-06-27 20:58:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:18,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476632571] [2024-06-27 20:58:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:19,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:19,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476632571] [2024-06-27 20:58:19,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476632571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:19,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:19,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:19,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426762787] [2024-06-27 20:58:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:19,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:19,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:19,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:19,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 404 transitions, 6466 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:19,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:19,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:19,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:20,419 INFO L124 PetriNetUnfolderBase]: 3328/5283 cut-off events. [2024-06-27 20:58:20,420 INFO L125 PetriNetUnfolderBase]: For 315784/315784 co-relation queries the response was YES. [2024-06-27 20:58:20,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45562 conditions, 5283 events. 3328/5283 cut-off events. For 315784/315784 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32066 event pairs, 694 based on Foata normal form. 4/5285 useless extension candidates. Maximal degree in co-relation 45431. Up to 4833 conditions per place. [2024-06-27 20:58:20,487 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 374 selfloop transitions, 59 changer transitions 0/438 dead transitions. [2024-06-27 20:58:20,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 438 transitions, 7851 flow [2024-06-27 20:58:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:58:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:58:20,489 INFO L175 Difference]: Start difference. First operand has 274 places, 404 transitions, 6466 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:58:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 438 transitions, 7851 flow [2024-06-27 20:58:21,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 438 transitions, 7767 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:58:21,245 INFO L231 Difference]: Finished difference. Result has 278 places, 413 transitions, 6795 flow [2024-06-27 20:58:21,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6795, PETRI_PLACES=278, PETRI_TRANSITIONS=413} [2024-06-27 20:58:21,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 20:58:21,246 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 413 transitions, 6795 flow [2024-06-27 20:58:21,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:21,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:21,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:21,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:58:21,247 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:21,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:21,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1260540785, now seen corresponding path program 2 times [2024-06-27 20:58:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:21,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484038046] [2024-06-27 20:58:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:21,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484038046] [2024-06-27 20:58:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484038046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:21,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:21,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496045598] [2024-06-27 20:58:21,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:21,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:21,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:21,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 413 transitions, 6795 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:21,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:21,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:21,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:23,044 INFO L124 PetriNetUnfolderBase]: 3348/5319 cut-off events. [2024-06-27 20:58:23,044 INFO L125 PetriNetUnfolderBase]: For 328199/328199 co-relation queries the response was YES. [2024-06-27 20:58:23,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46384 conditions, 5319 events. 3348/5319 cut-off events. For 328199/328199 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32354 event pairs, 701 based on Foata normal form. 4/5321 useless extension candidates. Maximal degree in co-relation 46251. Up to 4959 conditions per place. [2024-06-27 20:58:23,115 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 393 selfloop transitions, 38 changer transitions 0/436 dead transitions. [2024-06-27 20:58:23,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 436 transitions, 7965 flow [2024-06-27 20:58:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:58:23,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:58:23,117 INFO L175 Difference]: Start difference. First operand has 278 places, 413 transitions, 6795 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:58:23,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 436 transitions, 7965 flow [2024-06-27 20:58:24,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 436 transitions, 7807 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:58:24,138 INFO L231 Difference]: Finished difference. Result has 281 places, 416 transitions, 6811 flow [2024-06-27 20:58:24,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6655, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6811, PETRI_PLACES=281, PETRI_TRANSITIONS=416} [2024-06-27 20:58:24,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 20:58:24,139 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 416 transitions, 6811 flow [2024-06-27 20:58:24,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:24,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:24,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:24,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:58:24,140 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:24,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:24,140 INFO L85 PathProgramCache]: Analyzing trace with hash -393476959, now seen corresponding path program 2 times [2024-06-27 20:58:24,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:24,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852808924] [2024-06-27 20:58:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:24,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:24,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:24,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852808924] [2024-06-27 20:58:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852808924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:24,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:24,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:24,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040558448] [2024-06-27 20:58:24,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:24,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:24,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:24,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:24,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:24,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 416 transitions, 6811 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:24,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:24,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:24,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:25,974 INFO L124 PetriNetUnfolderBase]: 3358/5335 cut-off events. [2024-06-27 20:58:25,975 INFO L125 PetriNetUnfolderBase]: For 333528/333528 co-relation queries the response was YES. [2024-06-27 20:58:26,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46502 conditions, 5335 events. 3358/5335 cut-off events. For 333528/333528 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32448 event pairs, 697 based on Foata normal form. 2/5335 useless extension candidates. Maximal degree in co-relation 46369. Up to 5015 conditions per place. [2024-06-27 20:58:26,037 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 26 changer transitions 0/436 dead transitions. [2024-06-27 20:58:26,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 436 transitions, 7833 flow [2024-06-27 20:58:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:58:26,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:58:26,052 INFO L175 Difference]: Start difference. First operand has 281 places, 416 transitions, 6811 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:58:26,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 436 transitions, 7833 flow [2024-06-27 20:58:26,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 436 transitions, 7665 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:26,930 INFO L231 Difference]: Finished difference. Result has 283 places, 419 transitions, 6769 flow [2024-06-27 20:58:26,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6643, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6769, PETRI_PLACES=283, PETRI_TRANSITIONS=419} [2024-06-27 20:58:26,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-27 20:58:26,931 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 419 transitions, 6769 flow [2024-06-27 20:58:26,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:26,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:26,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:26,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:58:26,932 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:26,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -220749733, now seen corresponding path program 3 times [2024-06-27 20:58:26,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:26,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746323370] [2024-06-27 20:58:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:26,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746323370] [2024-06-27 20:58:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746323370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:27,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:27,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634304102] [2024-06-27 20:58:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:27,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:27,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:27,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 419 transitions, 6769 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:27,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:27,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:27,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:28,679 INFO L124 PetriNetUnfolderBase]: 3346/5311 cut-off events. [2024-06-27 20:58:28,679 INFO L125 PetriNetUnfolderBase]: For 337608/337608 co-relation queries the response was YES. [2024-06-27 20:58:28,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46063 conditions, 5311 events. 3346/5311 cut-off events. For 337608/337608 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32199 event pairs, 698 based on Foata normal form. 4/5313 useless extension candidates. Maximal degree in co-relation 45930. Up to 4987 conditions per place. [2024-06-27 20:58:28,751 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 398 selfloop transitions, 33 changer transitions 0/436 dead transitions. [2024-06-27 20:58:28,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 436 transitions, 7709 flow [2024-06-27 20:58:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:58:28,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:58:28,753 INFO L175 Difference]: Start difference. First operand has 283 places, 419 transitions, 6769 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:58:28,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 436 transitions, 7709 flow [2024-06-27 20:58:29,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 436 transitions, 7621 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:58:29,799 INFO L231 Difference]: Finished difference. Result has 286 places, 419 transitions, 6753 flow [2024-06-27 20:58:29,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6681, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6753, PETRI_PLACES=286, PETRI_TRANSITIONS=419} [2024-06-27 20:58:29,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-27 20:58:29,800 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 419 transitions, 6753 flow [2024-06-27 20:58:29,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:29,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:29,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:29,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:58:29,800 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:29,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:29,801 INFO L85 PathProgramCache]: Analyzing trace with hash -220740805, now seen corresponding path program 1 times [2024-06-27 20:58:29,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:29,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617202851] [2024-06-27 20:58:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:29,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617202851] [2024-06-27 20:58:30,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617202851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:30,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:30,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082311359] [2024-06-27 20:58:30,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:30,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:30,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:30,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:30,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:30,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 419 transitions, 6753 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:30,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:30,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:30,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:31,980 INFO L124 PetriNetUnfolderBase]: 3390/5385 cut-off events. [2024-06-27 20:58:31,980 INFO L125 PetriNetUnfolderBase]: For 359763/359763 co-relation queries the response was YES. [2024-06-27 20:58:32,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46610 conditions, 5385 events. 3390/5385 cut-off events. For 359763/359763 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 32785 event pairs, 675 based on Foata normal form. 12/5395 useless extension candidates. Maximal degree in co-relation 46476. Up to 4935 conditions per place. [2024-06-27 20:58:32,056 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 392 selfloop transitions, 48 changer transitions 0/445 dead transitions. [2024-06-27 20:58:32,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 445 transitions, 7835 flow [2024-06-27 20:58:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:58:32,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:58:32,057 INFO L175 Difference]: Start difference. First operand has 286 places, 419 transitions, 6753 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:58:32,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 445 transitions, 7835 flow [2024-06-27 20:58:33,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 445 transitions, 7754 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:58:33,214 INFO L231 Difference]: Finished difference. Result has 287 places, 420 transitions, 6789 flow [2024-06-27 20:58:33,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6672, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6789, PETRI_PLACES=287, PETRI_TRANSITIONS=420} [2024-06-27 20:58:33,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-27 20:58:33,215 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 420 transitions, 6789 flow [2024-06-27 20:58:33,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:33,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:33,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:33,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:58:33,216 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:33,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 627341821, now seen corresponding path program 4 times [2024-06-27 20:58:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:33,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761143048] [2024-06-27 20:58:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:33,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:33,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761143048] [2024-06-27 20:58:33,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761143048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:33,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:33,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629984957] [2024-06-27 20:58:33,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:33,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:33,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:33,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:33,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 420 transitions, 6789 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:33,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:33,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:33,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:35,001 INFO L124 PetriNetUnfolderBase]: 3398/5412 cut-off events. [2024-06-27 20:58:35,002 INFO L125 PetriNetUnfolderBase]: For 362398/362398 co-relation queries the response was YES. [2024-06-27 20:58:35,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46846 conditions, 5412 events. 3398/5412 cut-off events. For 362398/362398 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33102 event pairs, 652 based on Foata normal form. 8/5414 useless extension candidates. Maximal degree in co-relation 46711. Up to 4109 conditions per place. [2024-06-27 20:58:35,076 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 281 selfloop transitions, 165 changer transitions 0/451 dead transitions. [2024-06-27 20:58:35,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 451 transitions, 8233 flow [2024-06-27 20:58:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:58:35,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-27 20:58:35,078 INFO L175 Difference]: Start difference. First operand has 287 places, 420 transitions, 6789 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:58:35,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 451 transitions, 8233 flow [2024-06-27 20:58:36,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 451 transitions, 8136 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:36,151 INFO L231 Difference]: Finished difference. Result has 289 places, 423 transitions, 7112 flow [2024-06-27 20:58:36,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6692, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7112, PETRI_PLACES=289, PETRI_TRANSITIONS=423} [2024-06-27 20:58:36,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 20:58:36,151 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 423 transitions, 7112 flow [2024-06-27 20:58:36,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:36,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:36,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:36,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:58:36,152 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:36,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash -775577975, now seen corresponding path program 3 times [2024-06-27 20:58:36,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:36,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349642290] [2024-06-27 20:58:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:36,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:36,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349642290] [2024-06-27 20:58:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349642290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:36,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:36,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:36,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395616621] [2024-06-27 20:58:36,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:36,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:36,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:36,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:36,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 423 transitions, 7112 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:36,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:36,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:36,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:38,073 INFO L124 PetriNetUnfolderBase]: 3392/5402 cut-off events. [2024-06-27 20:58:38,074 INFO L125 PetriNetUnfolderBase]: For 362426/362426 co-relation queries the response was YES. [2024-06-27 20:58:38,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47485 conditions, 5402 events. 3392/5402 cut-off events. For 362426/362426 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 33011 event pairs, 713 based on Foata normal form. 2/5398 useless extension candidates. Maximal degree in co-relation 47349. Up to 4806 conditions per place. [2024-06-27 20:58:38,148 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 89 changer transitions 0/449 dead transitions. [2024-06-27 20:58:38,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 449 transitions, 8357 flow [2024-06-27 20:58:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:58:38,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:58:38,150 INFO L175 Difference]: Start difference. First operand has 289 places, 423 transitions, 7112 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:58:38,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 449 transitions, 8357 flow [2024-06-27 20:58:39,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 449 transitions, 7798 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-27 20:58:39,146 INFO L231 Difference]: Finished difference. Result has 289 places, 423 transitions, 6737 flow [2024-06-27 20:58:39,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6737, PETRI_PLACES=289, PETRI_TRANSITIONS=423} [2024-06-27 20:58:39,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 20:58:39,147 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 423 transitions, 6737 flow [2024-06-27 20:58:39,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:39,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:39,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:39,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:58:39,148 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:39,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:39,148 INFO L85 PathProgramCache]: Analyzing trace with hash 896102335, now seen corresponding path program 4 times [2024-06-27 20:58:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:39,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927330208] [2024-06-27 20:58:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:39,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:39,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:39,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927330208] [2024-06-27 20:58:39,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927330208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:39,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:39,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:39,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228327732] [2024-06-27 20:58:39,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:39,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:39,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:39,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:39,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:39,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:39,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 423 transitions, 6737 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:39,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:39,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:39,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:40,980 INFO L124 PetriNetUnfolderBase]: 3386/5382 cut-off events. [2024-06-27 20:58:40,981 INFO L125 PetriNetUnfolderBase]: For 361815/361815 co-relation queries the response was YES. [2024-06-27 20:58:41,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46256 conditions, 5382 events. 3386/5382 cut-off events. For 361815/361815 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 32871 event pairs, 707 based on Foata normal form. 2/5378 useless extension candidates. Maximal degree in co-relation 46121. Up to 4801 conditions per place. [2024-06-27 20:58:41,060 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 344 selfloop transitions, 98 changer transitions 0/447 dead transitions. [2024-06-27 20:58:41,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 447 transitions, 7839 flow [2024-06-27 20:58:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:58:41,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 20:58:41,062 INFO L175 Difference]: Start difference. First operand has 289 places, 423 transitions, 6737 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:58:41,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 447 transitions, 7839 flow [2024-06-27 20:58:42,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 447 transitions, 7621 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:42,185 INFO L231 Difference]: Finished difference. Result has 291 places, 423 transitions, 6721 flow [2024-06-27 20:58:42,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6721, PETRI_PLACES=291, PETRI_TRANSITIONS=423} [2024-06-27 20:58:42,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-27 20:58:42,186 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 423 transitions, 6721 flow [2024-06-27 20:58:42,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:42,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:42,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:42,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:58:42,187 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:42,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:42,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1011126781, now seen corresponding path program 5 times [2024-06-27 20:58:42,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:42,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749528672] [2024-06-27 20:58:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:42,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:42,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:42,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749528672] [2024-06-27 20:58:42,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749528672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:42,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:42,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461595453] [2024-06-27 20:58:42,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:42,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:42,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:42,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:42,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:42,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:42,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 423 transitions, 6721 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:42,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:42,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:42,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:44,181 INFO L124 PetriNetUnfolderBase]: 3394/5389 cut-off events. [2024-06-27 20:58:44,181 INFO L125 PetriNetUnfolderBase]: For 377193/377193 co-relation queries the response was YES. [2024-06-27 20:58:44,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46286 conditions, 5389 events. 3394/5389 cut-off events. For 377193/377193 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32892 event pairs, 831 based on Foata normal form. 8/5395 useless extension candidates. Maximal degree in co-relation 46150. Up to 4892 conditions per place. [2024-06-27 20:58:44,248 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 63 changer transitions 0/450 dead transitions. [2024-06-27 20:58:44,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 450 transitions, 8057 flow [2024-06-27 20:58:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:58:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:58:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:58:44,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 20:58:44,250 INFO L175 Difference]: Start difference. First operand has 291 places, 423 transitions, 6721 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:58:44,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 450 transitions, 8057 flow [2024-06-27 20:58:45,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 450 transitions, 7891 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:58:45,378 INFO L231 Difference]: Finished difference. Result has 295 places, 426 transitions, 6745 flow [2024-06-27 20:58:45,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6555, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6745, PETRI_PLACES=295, PETRI_TRANSITIONS=426} [2024-06-27 20:58:45,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-27 20:58:45,379 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 426 transitions, 6745 flow [2024-06-27 20:58:45,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:45,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:45,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:45,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:58:45,380 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:45,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1478534181, now seen corresponding path program 6 times [2024-06-27 20:58:45,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:45,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631640959] [2024-06-27 20:58:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:45,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:45,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631640959] [2024-06-27 20:58:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631640959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:45,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:45,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:45,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220026072] [2024-06-27 20:58:45,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:45,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:45,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:45,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:46,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:46,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 426 transitions, 6745 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:46,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:46,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:46,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:47,238 INFO L124 PetriNetUnfolderBase]: 3402/5425 cut-off events. [2024-06-27 20:58:47,238 INFO L125 PetriNetUnfolderBase]: For 379519/379519 co-relation queries the response was YES. [2024-06-27 20:58:47,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46388 conditions, 5425 events. 3402/5425 cut-off events. For 379519/379519 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33262 event pairs, 669 based on Foata normal form. 8/5431 useless extension candidates. Maximal degree in co-relation 46251. Up to 4602 conditions per place. [2024-06-27 20:58:47,315 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 351 selfloop transitions, 105 changer transitions 0/461 dead transitions. [2024-06-27 20:58:47,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 461 transitions, 8210 flow [2024-06-27 20:58:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:58:47,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:58:47,317 INFO L175 Difference]: Start difference. First operand has 295 places, 426 transitions, 6745 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:58:47,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 461 transitions, 8210 flow [2024-06-27 20:58:48,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 461 transitions, 8014 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 20:58:48,537 INFO L231 Difference]: Finished difference. Result has 294 places, 429 transitions, 6843 flow [2024-06-27 20:58:48,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6843, PETRI_PLACES=294, PETRI_TRANSITIONS=429} [2024-06-27 20:58:48,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-27 20:58:48,538 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 429 transitions, 6843 flow [2024-06-27 20:58:48,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:48,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:48,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:48,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:58:48,538 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:48,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash -747889461, now seen corresponding path program 7 times [2024-06-27 20:58:48,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:48,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168981429] [2024-06-27 20:58:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:48,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:49,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168981429] [2024-06-27 20:58:49,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168981429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:49,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:49,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:49,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484281981] [2024-06-27 20:58:49,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:49,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:49,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:49,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:49,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:49,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 429 transitions, 6843 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:49,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:49,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:49,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:50,263 INFO L124 PetriNetUnfolderBase]: 3422/5455 cut-off events. [2024-06-27 20:58:50,264 INFO L125 PetriNetUnfolderBase]: For 384830/384830 co-relation queries the response was YES. [2024-06-27 20:58:50,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46885 conditions, 5455 events. 3422/5455 cut-off events. For 384830/384830 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33463 event pairs, 705 based on Foata normal form. 4/5457 useless extension candidates. Maximal degree in co-relation 46748. Up to 5111 conditions per place. [2024-06-27 20:58:50,344 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 415 selfloop transitions, 28 changer transitions 0/448 dead transitions. [2024-06-27 20:58:50,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 448 transitions, 7877 flow [2024-06-27 20:58:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:58:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:58:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:58:50,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:58:50,346 INFO L175 Difference]: Start difference. First operand has 294 places, 429 transitions, 6843 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:58:50,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 448 transitions, 7877 flow [2024-06-27 20:58:51,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 448 transitions, 7697 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 20:58:51,659 INFO L231 Difference]: Finished difference. Result has 297 places, 432 transitions, 6803 flow [2024-06-27 20:58:51,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6665, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6803, PETRI_PLACES=297, PETRI_TRANSITIONS=432} [2024-06-27 20:58:51,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-27 20:58:51,661 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 432 transitions, 6803 flow [2024-06-27 20:58:51,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:51,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:51,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:51,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:58:51,661 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:51,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1478088711, now seen corresponding path program 8 times [2024-06-27 20:58:51,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:51,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178155854] [2024-06-27 20:58:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:51,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:52,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:52,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178155854] [2024-06-27 20:58:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178155854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:52,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:52,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:52,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834351860] [2024-06-27 20:58:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:52,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:52,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:52,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 432 transitions, 6803 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:52,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:52,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:52,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:53,657 INFO L124 PetriNetUnfolderBase]: 3390/5395 cut-off events. [2024-06-27 20:58:53,658 INFO L125 PetriNetUnfolderBase]: For 386503/386503 co-relation queries the response was YES. [2024-06-27 20:58:53,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45621 conditions, 5395 events. 3390/5395 cut-off events. For 386503/386503 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33070 event pairs, 829 based on Foata normal form. 8/5401 useless extension candidates. Maximal degree in co-relation 45483. Up to 4957 conditions per place. [2024-06-27 20:58:53,725 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 401 selfloop transitions, 47 changer transitions 0/453 dead transitions. [2024-06-27 20:58:53,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 453 transitions, 7833 flow [2024-06-27 20:58:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:58:53,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:58:53,726 INFO L175 Difference]: Start difference. First operand has 297 places, 432 transitions, 6803 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:58:53,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 453 transitions, 7833 flow [2024-06-27 20:58:54,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 453 transitions, 7697 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:58:54,951 INFO L231 Difference]: Finished difference. Result has 300 places, 432 transitions, 6778 flow [2024-06-27 20:58:54,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6667, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6778, PETRI_PLACES=300, PETRI_TRANSITIONS=432} [2024-06-27 20:58:54,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-27 20:58:54,952 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 432 transitions, 6778 flow [2024-06-27 20:58:54,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:54,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:54,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:54,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:58:54,952 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:54,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:54,953 INFO L85 PathProgramCache]: Analyzing trace with hash 568283169, now seen corresponding path program 9 times [2024-06-27 20:58:54,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:54,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820890309] [2024-06-27 20:58:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:54,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:55,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:55,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820890309] [2024-06-27 20:58:55,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820890309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:55,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:55,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140702138] [2024-06-27 20:58:55,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:55,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:55,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 432 transitions, 6778 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:55,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:55,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:55,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:56,721 INFO L124 PetriNetUnfolderBase]: 3378/5385 cut-off events. [2024-06-27 20:58:56,721 INFO L125 PetriNetUnfolderBase]: For 381580/381580 co-relation queries the response was YES. [2024-06-27 20:58:56,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45332 conditions, 5385 events. 3378/5385 cut-off events. For 381580/381580 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32947 event pairs, 671 based on Foata normal form. 4/5387 useless extension candidates. Maximal degree in co-relation 45193. Up to 4979 conditions per place. [2024-06-27 20:58:56,802 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 399 selfloop transitions, 50 changer transitions 0/454 dead transitions. [2024-06-27 20:58:56,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 454 transitions, 7819 flow [2024-06-27 20:58:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:58:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:58:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:58:56,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-27 20:58:56,803 INFO L175 Difference]: Start difference. First operand has 300 places, 432 transitions, 6778 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:58:56,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 454 transitions, 7819 flow [2024-06-27 20:58:57,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 454 transitions, 7705 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:58:57,875 INFO L231 Difference]: Finished difference. Result has 300 places, 432 transitions, 6771 flow [2024-06-27 20:58:57,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6664, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6771, PETRI_PLACES=300, PETRI_TRANSITIONS=432} [2024-06-27 20:58:57,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-27 20:58:57,875 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 432 transitions, 6771 flow [2024-06-27 20:58:57,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:57,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:57,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:57,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:58:57,876 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:57,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1684941543, now seen corresponding path program 2 times [2024-06-27 20:58:57,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:57,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667052752] [2024-06-27 20:58:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:57,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:58,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:58,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667052752] [2024-06-27 20:58:58,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667052752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:58,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:58,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:58,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92995940] [2024-06-27 20:58:58,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:58,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:58,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:58,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:58,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:58,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:58:58,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 432 transitions, 6771 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:58,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:58,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:58:58,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:59,893 INFO L124 PetriNetUnfolderBase]: 3422/5465 cut-off events. [2024-06-27 20:58:59,894 INFO L125 PetriNetUnfolderBase]: For 408121/408121 co-relation queries the response was YES. [2024-06-27 20:58:59,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45871 conditions, 5465 events. 3422/5465 cut-off events. For 408121/408121 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33589 event pairs, 662 based on Foata normal form. 12/5475 useless extension candidates. Maximal degree in co-relation 45731. Up to 5021 conditions per place. [2024-06-27 20:58:59,972 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 410 selfloop transitions, 41 changer transitions 0/456 dead transitions. [2024-06-27 20:58:59,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 456 transitions, 7849 flow [2024-06-27 20:58:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:58:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:58:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:58:59,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-27 20:58:59,973 INFO L175 Difference]: Start difference. First operand has 300 places, 432 transitions, 6771 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:58:59,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 456 transitions, 7849 flow [2024-06-27 20:59:01,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 456 transitions, 7550 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:59:01,324 INFO L231 Difference]: Finished difference. Result has 299 places, 433 transitions, 6577 flow [2024-06-27 20:59:01,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6472, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6577, PETRI_PLACES=299, PETRI_TRANSITIONS=433} [2024-06-27 20:59:01,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-27 20:59:01,325 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 433 transitions, 6577 flow [2024-06-27 20:59:01,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:01,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:01,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:01,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:59:01,325 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:01,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:01,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1241607753, now seen corresponding path program 3 times [2024-06-27 20:59:01,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:01,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265226885] [2024-06-27 20:59:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:01,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:02,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:02,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265226885] [2024-06-27 20:59:02,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265226885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:02,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:02,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:02,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538451494] [2024-06-27 20:59:02,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:02,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:02,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:02,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:02,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 433 transitions, 6577 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:02,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:02,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:02,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:03,477 INFO L124 PetriNetUnfolderBase]: 3509/5604 cut-off events. [2024-06-27 20:59:03,477 INFO L125 PetriNetUnfolderBase]: For 428397/428397 co-relation queries the response was YES. [2024-06-27 20:59:03,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47347 conditions, 5604 events. 3509/5604 cut-off events. For 428397/428397 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34471 event pairs, 566 based on Foata normal form. 8/5610 useless extension candidates. Maximal degree in co-relation 47206. Up to 5056 conditions per place. [2024-06-27 20:59:03,551 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 417 selfloop transitions, 43 changer transitions 0/465 dead transitions. [2024-06-27 20:59:03,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 465 transitions, 7869 flow [2024-06-27 20:59:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:59:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:59:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:59:03,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-27 20:59:03,553 INFO L175 Difference]: Start difference. First operand has 299 places, 433 transitions, 6577 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:59:03,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 465 transitions, 7869 flow [2024-06-27 20:59:04,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 465 transitions, 7784 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:59:04,810 INFO L231 Difference]: Finished difference. Result has 302 places, 436 transitions, 6645 flow [2024-06-27 20:59:04,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6645, PETRI_PLACES=302, PETRI_TRANSITIONS=436} [2024-06-27 20:59:04,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 20:59:04,811 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 436 transitions, 6645 flow [2024-06-27 20:59:04,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:04,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:04,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:04,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:59:04,812 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:04,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1256844873, now seen corresponding path program 4 times [2024-06-27 20:59:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352638400] [2024-06-27 20:59:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:05,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352638400] [2024-06-27 20:59:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352638400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:05,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:05,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:05,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663395311] [2024-06-27 20:59:05,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:05,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:05,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:05,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 436 transitions, 6645 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:05,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:05,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:05,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:06,856 INFO L124 PetriNetUnfolderBase]: 3476/5561 cut-off events. [2024-06-27 20:59:06,857 INFO L125 PetriNetUnfolderBase]: For 423511/423511 co-relation queries the response was YES. [2024-06-27 20:59:06,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46451 conditions, 5561 events. 3476/5561 cut-off events. For 423511/423511 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34276 event pairs, 561 based on Foata normal form. 14/5573 useless extension candidates. Maximal degree in co-relation 46308. Up to 5078 conditions per place. [2024-06-27 20:59:06,945 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 414 selfloop transitions, 40 changer transitions 0/459 dead transitions. [2024-06-27 20:59:06,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 459 transitions, 7691 flow [2024-06-27 20:59:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:59:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:59:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 20:59:06,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 20:59:06,946 INFO L175 Difference]: Start difference. First operand has 302 places, 436 transitions, 6645 flow. Second operand 6 states and 126 transitions. [2024-06-27 20:59:06,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 459 transitions, 7691 flow [2024-06-27 20:59:08,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 459 transitions, 7636 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:59:08,309 INFO L231 Difference]: Finished difference. Result has 305 places, 436 transitions, 6684 flow [2024-06-27 20:59:08,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6684, PETRI_PLACES=305, PETRI_TRANSITIONS=436} [2024-06-27 20:59:08,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-27 20:59:08,310 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 436 transitions, 6684 flow [2024-06-27 20:59:08,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:08,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:08,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:08,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:59:08,311 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:08,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash 893255295, now seen corresponding path program 1 times [2024-06-27 20:59:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:08,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640799537] [2024-06-27 20:59:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:08,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:09,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:09,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640799537] [2024-06-27 20:59:09,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640799537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:09,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:09,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:09,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420184894] [2024-06-27 20:59:09,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:09,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:09,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:09,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:09,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:09,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:09,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 436 transitions, 6684 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:09,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:09,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:09,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:10,643 INFO L124 PetriNetUnfolderBase]: 3699/5916 cut-off events. [2024-06-27 20:59:10,643 INFO L125 PetriNetUnfolderBase]: For 464673/464673 co-relation queries the response was YES. [2024-06-27 20:59:10,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49262 conditions, 5916 events. 3699/5916 cut-off events. For 464673/464673 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 36996 event pairs, 681 based on Foata normal form. 14/5924 useless extension candidates. Maximal degree in co-relation 49117. Up to 4784 conditions per place. [2024-06-27 20:59:10,734 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 351 selfloop transitions, 130 changer transitions 0/486 dead transitions. [2024-06-27 20:59:10,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 486 transitions, 8394 flow [2024-06-27 20:59:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:59:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:59:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 20:59:10,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-27 20:59:10,735 INFO L175 Difference]: Start difference. First operand has 305 places, 436 transitions, 6684 flow. Second operand 9 states and 183 transitions. [2024-06-27 20:59:10,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 486 transitions, 8394 flow [2024-06-27 20:59:12,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 486 transitions, 8309 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 20:59:12,272 INFO L231 Difference]: Finished difference. Result has 310 places, 444 transitions, 7058 flow [2024-06-27 20:59:12,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6599, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7058, PETRI_PLACES=310, PETRI_TRANSITIONS=444} [2024-06-27 20:59:12,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-27 20:59:12,272 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 444 transitions, 7058 flow [2024-06-27 20:59:12,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:12,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:12,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:12,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:59:12,273 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:12,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash -509603741, now seen corresponding path program 1 times [2024-06-27 20:59:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:12,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118440367] [2024-06-27 20:59:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:12,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:12,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:12,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118440367] [2024-06-27 20:59:12,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118440367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:12,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:12,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191354396] [2024-06-27 20:59:12,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:12,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:13,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:13,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 444 transitions, 7058 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:13,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:13,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:13,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:14,468 INFO L124 PetriNetUnfolderBase]: 3771/5999 cut-off events. [2024-06-27 20:59:14,469 INFO L125 PetriNetUnfolderBase]: For 478348/478348 co-relation queries the response was YES. [2024-06-27 20:59:14,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51643 conditions, 5999 events. 3771/5999 cut-off events. For 478348/478348 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 37350 event pairs, 705 based on Foata normal form. 6/5999 useless extension candidates. Maximal degree in co-relation 51496. Up to 4466 conditions per place. [2024-06-27 20:59:14,557 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 261 selfloop transitions, 228 changer transitions 0/494 dead transitions. [2024-06-27 20:59:14,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 494 transitions, 8990 flow [2024-06-27 20:59:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:59:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:59:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:59:14,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47671840354767187 [2024-06-27 20:59:14,559 INFO L175 Difference]: Start difference. First operand has 310 places, 444 transitions, 7058 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:59:14,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 494 transitions, 8990 flow [2024-06-27 20:59:16,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 494 transitions, 8785 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:59:16,435 INFO L231 Difference]: Finished difference. Result has 317 places, 458 transitions, 7663 flow [2024-06-27 20:59:16,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6853, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7663, PETRI_PLACES=317, PETRI_TRANSITIONS=458} [2024-06-27 20:59:16,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-27 20:59:16,436 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 458 transitions, 7663 flow [2024-06-27 20:59:16,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:16,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:16,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:16,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:59:16,436 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:16,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash 893315745, now seen corresponding path program 2 times [2024-06-27 20:59:16,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:16,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059280660] [2024-06-27 20:59:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:16,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:17,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:17,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059280660] [2024-06-27 20:59:17,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059280660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:17,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:17,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:17,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563591078] [2024-06-27 20:59:17,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:17,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:17,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:17,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:17,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:17,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:17,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 458 transitions, 7663 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:17,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:17,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:17,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:18,787 INFO L124 PetriNetUnfolderBase]: 3823/6101 cut-off events. [2024-06-27 20:59:18,788 INFO L125 PetriNetUnfolderBase]: For 518486/518486 co-relation queries the response was YES. [2024-06-27 20:59:18,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54227 conditions, 6101 events. 3823/6101 cut-off events. For 518486/518486 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38227 event pairs, 771 based on Foata normal form. 14/6109 useless extension candidates. Maximal degree in co-relation 54077. Up to 5351 conditions per place. [2024-06-27 20:59:18,882 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 365 selfloop transitions, 125 changer transitions 0/495 dead transitions. [2024-06-27 20:59:18,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 495 transitions, 9140 flow [2024-06-27 20:59:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:59:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:59:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:59:18,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:59:18,883 INFO L175 Difference]: Start difference. First operand has 317 places, 458 transitions, 7663 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:59:18,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 495 transitions, 9140 flow [2024-06-27 20:59:20,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 495 transitions, 8756 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 20:59:20,815 INFO L231 Difference]: Finished difference. Result has 320 places, 461 transitions, 7600 flow [2024-06-27 20:59:20,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7279, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7600, PETRI_PLACES=320, PETRI_TRANSITIONS=461} [2024-06-27 20:59:20,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-27 20:59:20,816 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 461 transitions, 7600 flow [2024-06-27 20:59:20,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:20,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:20,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:20,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:59:20,816 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:20,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1011403549, now seen corresponding path program 2 times [2024-06-27 20:59:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138794473] [2024-06-27 20:59:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:21,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:21,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138794473] [2024-06-27 20:59:21,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138794473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:21,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:21,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074037533] [2024-06-27 20:59:21,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:21,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:21,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:21,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:21,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 461 transitions, 7600 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:21,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:21,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:21,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:23,445 INFO L124 PetriNetUnfolderBase]: 3897/6185 cut-off events. [2024-06-27 20:59:23,445 INFO L125 PetriNetUnfolderBase]: For 522515/522515 co-relation queries the response was YES. [2024-06-27 20:59:23,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55648 conditions, 6185 events. 3897/6185 cut-off events. For 522515/522515 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 38578 event pairs, 899 based on Foata normal form. 6/6189 useless extension candidates. Maximal degree in co-relation 55496. Up to 5578 conditions per place. [2024-06-27 20:59:23,531 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 414 selfloop transitions, 83 changer transitions 0/502 dead transitions. [2024-06-27 20:59:23,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 502 transitions, 9467 flow [2024-06-27 20:59:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:59:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:59:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-27 20:59:23,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:59:23,533 INFO L175 Difference]: Start difference. First operand has 320 places, 461 transitions, 7600 flow. Second operand 11 states and 205 transitions. [2024-06-27 20:59:23,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 502 transitions, 9467 flow [2024-06-27 20:59:25,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 502 transitions, 9187 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 20:59:25,787 INFO L231 Difference]: Finished difference. Result has 324 places, 473 transitions, 7795 flow [2024-06-27 20:59:25,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7332, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7795, PETRI_PLACES=324, PETRI_TRANSITIONS=473} [2024-06-27 20:59:25,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-27 20:59:25,788 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 473 transitions, 7795 flow [2024-06-27 20:59:25,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:25,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:25,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:25,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:59:25,789 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:25,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:25,790 INFO L85 PathProgramCache]: Analyzing trace with hash -391516185, now seen corresponding path program 3 times [2024-06-27 20:59:25,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:25,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409069713] [2024-06-27 20:59:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:25,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:26,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:26,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409069713] [2024-06-27 20:59:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409069713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:26,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:26,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:26,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457750927] [2024-06-27 20:59:26,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:26,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:26,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 473 transitions, 7795 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:26,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:26,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:26,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:28,604 INFO L124 PetriNetUnfolderBase]: 4180/6629 cut-off events. [2024-06-27 20:59:28,604 INFO L125 PetriNetUnfolderBase]: For 732385/732385 co-relation queries the response was YES. [2024-06-27 20:59:28,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58604 conditions, 6629 events. 4180/6629 cut-off events. For 732385/732385 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 41411 event pairs, 1009 based on Foata normal form. 85/6712 useless extension candidates. Maximal degree in co-relation 58450. Up to 5785 conditions per place. [2024-06-27 20:59:28,711 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 434 selfloop transitions, 63 changer transitions 7/509 dead transitions. [2024-06-27 20:59:28,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 509 transitions, 9160 flow [2024-06-27 20:59:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:59:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:59:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:59:28,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:59:28,712 INFO L175 Difference]: Start difference. First operand has 324 places, 473 transitions, 7795 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:59:28,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 509 transitions, 9160 flow [2024-06-27 20:59:30,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 509 transitions, 8982 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:59:30,742 INFO L231 Difference]: Finished difference. Result has 328 places, 474 transitions, 7854 flow [2024-06-27 20:59:30,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7621, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7854, PETRI_PLACES=328, PETRI_TRANSITIONS=474} [2024-06-27 20:59:30,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-27 20:59:30,743 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 474 transitions, 7854 flow [2024-06-27 20:59:30,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:30,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:30,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:30,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:59:30,744 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:30,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1011588123, now seen corresponding path program 1 times [2024-06-27 20:59:30,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:30,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275938975] [2024-06-27 20:59:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:30,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:31,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:31,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275938975] [2024-06-27 20:59:31,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275938975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:31,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:31,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195533924] [2024-06-27 20:59:31,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:31,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:31,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:31,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:31,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 474 transitions, 7854 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:31,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:31,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:31,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:33,157 INFO L124 PetriNetUnfolderBase]: 4024/6389 cut-off events. [2024-06-27 20:59:33,158 INFO L125 PetriNetUnfolderBase]: For 552170/552170 co-relation queries the response was YES. [2024-06-27 20:59:33,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57904 conditions, 6389 events. 4024/6389 cut-off events. For 552170/552170 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40075 event pairs, 951 based on Foata normal form. 2/6389 useless extension candidates. Maximal degree in co-relation 57747. Up to 6053 conditions per place. [2024-06-27 20:59:33,244 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 28 changer transitions 0/492 dead transitions. [2024-06-27 20:59:33,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 492 transitions, 8934 flow [2024-06-27 20:59:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:59:33,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:59:33,252 INFO L175 Difference]: Start difference. First operand has 328 places, 474 transitions, 7854 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:59:33,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 492 transitions, 8934 flow [2024-06-27 20:59:35,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 492 transitions, 8778 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:35,009 INFO L231 Difference]: Finished difference. Result has 330 places, 476 transitions, 7815 flow [2024-06-27 20:59:35,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7698, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7815, PETRI_PLACES=330, PETRI_TRANSITIONS=476} [2024-06-27 20:59:35,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-27 20:59:35,010 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 476 transitions, 7815 flow [2024-06-27 20:59:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:35,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:35,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:35,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:59:35,016 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:35,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1478079783, now seen corresponding path program 3 times [2024-06-27 20:59:35,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:35,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553617166] [2024-06-27 20:59:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:35,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:35,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553617166] [2024-06-27 20:59:35,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553617166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:35,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:35,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:35,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806992332] [2024-06-27 20:59:35,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:35,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:35,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:35,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:35,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 476 transitions, 7815 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:35,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:35,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:35,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:37,713 INFO L124 PetriNetUnfolderBase]: 4044/6423 cut-off events. [2024-06-27 20:59:37,714 INFO L125 PetriNetUnfolderBase]: For 568378/568378 co-relation queries the response was YES. [2024-06-27 20:59:37,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57972 conditions, 6423 events. 4044/6423 cut-off events. For 568378/568378 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40334 event pairs, 942 based on Foata normal form. 4/6425 useless extension candidates. Maximal degree in co-relation 57814. Up to 5985 conditions per place. [2024-06-27 20:59:37,799 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 448 selfloop transitions, 55 changer transitions 1/509 dead transitions. [2024-06-27 20:59:37,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 509 transitions, 9141 flow [2024-06-27 20:59:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:59:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:59:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:59:37,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:59:37,800 INFO L175 Difference]: Start difference. First operand has 330 places, 476 transitions, 7815 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:59:37,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 509 transitions, 9141 flow [2024-06-27 20:59:39,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 8983 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:39,526 INFO L231 Difference]: Finished difference. Result has 336 places, 488 transitions, 8061 flow [2024-06-27 20:59:39,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7657, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8061, PETRI_PLACES=336, PETRI_TRANSITIONS=488} [2024-06-27 20:59:39,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 20:59:39,526 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 488 transitions, 8061 flow [2024-06-27 20:59:39,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:39,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:39,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:39,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:59:39,527 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:39,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash 576096161, now seen corresponding path program 2 times [2024-06-27 20:59:39,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:39,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147700831] [2024-06-27 20:59:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:39,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:40,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:40,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147700831] [2024-06-27 20:59:40,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147700831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:40,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:40,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:40,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248829946] [2024-06-27 20:59:40,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:40,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:40,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:40,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 488 transitions, 8061 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:40,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:40,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:40,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:41,883 INFO L124 PetriNetUnfolderBase]: 4048/6421 cut-off events. [2024-06-27 20:59:41,883 INFO L125 PetriNetUnfolderBase]: For 579198/579198 co-relation queries the response was YES. [2024-06-27 20:59:41,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58461 conditions, 6421 events. 4048/6421 cut-off events. For 579198/579198 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40254 event pairs, 948 based on Foata normal form. 2/6421 useless extension candidates. Maximal degree in co-relation 58301. Up to 6079 conditions per place. [2024-06-27 20:59:41,986 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 470 selfloop transitions, 30 changer transitions 0/505 dead transitions. [2024-06-27 20:59:41,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 505 transitions, 9169 flow [2024-06-27 20:59:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:59:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:59:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:59:41,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 20:59:41,987 INFO L175 Difference]: Start difference. First operand has 336 places, 488 transitions, 8061 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:59:41,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 505 transitions, 9169 flow [2024-06-27 20:59:44,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 505 transitions, 9021 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:44,184 INFO L231 Difference]: Finished difference. Result has 339 places, 490 transitions, 8041 flow [2024-06-27 20:59:44,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7913, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8041, PETRI_PLACES=339, PETRI_TRANSITIONS=490} [2024-06-27 20:59:44,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-27 20:59:44,185 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 490 transitions, 8041 flow [2024-06-27 20:59:44,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:44,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:44,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:44,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:59:44,187 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:44,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:44,187 INFO L85 PathProgramCache]: Analyzing trace with hash 582352271, now seen corresponding path program 3 times [2024-06-27 20:59:44,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:44,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729888380] [2024-06-27 20:59:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:44,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:45,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729888380] [2024-06-27 20:59:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729888380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:45,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:45,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918887969] [2024-06-27 20:59:45,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:45,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:45,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:45,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 490 transitions, 8041 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:45,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:45,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:45,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:46,667 INFO L124 PetriNetUnfolderBase]: 4056/6433 cut-off events. [2024-06-27 20:59:46,667 INFO L125 PetriNetUnfolderBase]: For 591248/591248 co-relation queries the response was YES. [2024-06-27 20:59:46,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58640 conditions, 6433 events. 4056/6433 cut-off events. For 591248/591248 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40330 event pairs, 942 based on Foata normal form. 2/6433 useless extension candidates. Maximal degree in co-relation 58478. Up to 6085 conditions per place. [2024-06-27 20:59:46,767 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 470 selfloop transitions, 30 changer transitions 0/505 dead transitions. [2024-06-27 20:59:46,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 505 transitions, 9145 flow [2024-06-27 20:59:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:59:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:59:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 20:59:46,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:59:46,768 INFO L175 Difference]: Start difference. First operand has 339 places, 490 transitions, 8041 flow. Second operand 6 states and 112 transitions. [2024-06-27 20:59:46,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 505 transitions, 9145 flow [2024-06-27 20:59:48,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 505 transitions, 9023 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:59:48,834 INFO L231 Difference]: Finished difference. Result has 340 places, 492 transitions, 8054 flow [2024-06-27 20:59:48,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7923, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8054, PETRI_PLACES=340, PETRI_TRANSITIONS=492} [2024-06-27 20:59:48,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-27 20:59:48,835 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 492 transitions, 8054 flow [2024-06-27 20:59:48,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:48,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:48,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:48,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:59:48,835 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:48,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash 575911587, now seen corresponding path program 4 times [2024-06-27 20:59:48,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:48,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78660931] [2024-06-27 20:59:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:48,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:49,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78660931] [2024-06-27 20:59:49,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78660931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:49,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:49,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:49,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300651917] [2024-06-27 20:59:49,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:49,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:49,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:49,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 492 transitions, 8054 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:49,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:49,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:49,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:51,489 INFO L124 PetriNetUnfolderBase]: 4114/6508 cut-off events. [2024-06-27 20:59:51,490 INFO L125 PetriNetUnfolderBase]: For 613060/613060 co-relation queries the response was YES. [2024-06-27 20:59:51,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59618 conditions, 6508 events. 4114/6508 cut-off events. For 613060/613060 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40661 event pairs, 773 based on Foata normal form. 6/6512 useless extension candidates. Maximal degree in co-relation 59455. Up to 5569 conditions per place. [2024-06-27 20:59:51,591 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 384 selfloop transitions, 153 changer transitions 0/542 dead transitions. [2024-06-27 20:59:51,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 542 transitions, 10116 flow [2024-06-27 20:59:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:59:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:59:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 20:59:51,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-27 20:59:51,592 INFO L175 Difference]: Start difference. First operand has 340 places, 492 transitions, 8054 flow. Second operand 10 states and 204 transitions. [2024-06-27 20:59:51,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 542 transitions, 10116 flow [2024-06-27 20:59:54,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 542 transitions, 10005 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:54,036 INFO L231 Difference]: Finished difference. Result has 347 places, 503 transitions, 8573 flow [2024-06-27 20:59:54,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7949, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8573, PETRI_PLACES=347, PETRI_TRANSITIONS=503} [2024-06-27 20:59:54,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-27 20:59:54,037 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 503 transitions, 8573 flow [2024-06-27 20:59:54,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:54,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:54,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:54,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:59:54,038 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:54,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash 582582663, now seen corresponding path program 1 times [2024-06-27 20:59:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:54,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627083033] [2024-06-27 20:59:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:54,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:54,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627083033] [2024-06-27 20:59:54,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627083033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:54,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:54,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:54,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264631620] [2024-06-27 20:59:54,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:54,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:54,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:54,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:54,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:54,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 503 transitions, 8573 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:54,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:54,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:56,585 INFO L124 PetriNetUnfolderBase]: 4161/6594 cut-off events. [2024-06-27 20:59:56,585 INFO L125 PetriNetUnfolderBase]: For 617615/617615 co-relation queries the response was YES. [2024-06-27 20:59:56,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61038 conditions, 6594 events. 4161/6594 cut-off events. For 617615/617615 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 41389 event pairs, 784 based on Foata normal form. 5/6597 useless extension candidates. Maximal degree in co-relation 60873. Up to 5844 conditions per place. [2024-06-27 20:59:56,687 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 135 changer transitions 0/536 dead transitions. [2024-06-27 20:59:56,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 536 transitions, 10045 flow [2024-06-27 20:59:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:59:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:59:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 20:59:56,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-27 20:59:56,688 INFO L175 Difference]: Start difference. First operand has 347 places, 503 transitions, 8573 flow. Second operand 7 states and 149 transitions. [2024-06-27 20:59:56,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 536 transitions, 10045 flow [2024-06-27 20:59:58,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 536 transitions, 9713 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:58,919 INFO L231 Difference]: Finished difference. Result has 349 places, 512 transitions, 8832 flow [2024-06-27 20:59:58,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8241, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8832, PETRI_PLACES=349, PETRI_TRANSITIONS=512} [2024-06-27 20:59:58,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-27 20:59:58,920 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 512 transitions, 8832 flow [2024-06-27 20:59:58,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:58,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:58,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:58,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:59:58,921 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:58,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1241897479, now seen corresponding path program 4 times [2024-06-27 20:59:58,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:58,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730033410] [2024-06-27 20:59:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:59,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:59,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730033410] [2024-06-27 20:59:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730033410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:59,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:59,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613332887] [2024-06-27 20:59:59,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:59,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:59,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:59,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:59,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:59,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:59:59,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 512 transitions, 8832 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:59,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:59,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:59:59,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:01,505 INFO L124 PetriNetUnfolderBase]: 4169/6594 cut-off events. [2024-06-27 21:00:01,506 INFO L125 PetriNetUnfolderBase]: For 627220/627220 co-relation queries the response was YES. [2024-06-27 21:00:01,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62056 conditions, 6594 events. 4169/6594 cut-off events. For 627220/627220 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 41337 event pairs, 966 based on Foata normal form. 2/6594 useless extension candidates. Maximal degree in co-relation 61888. Up to 6232 conditions per place. [2024-06-27 21:00:01,596 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 485 selfloop transitions, 37 changer transitions 0/527 dead transitions. [2024-06-27 21:00:01,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 527 transitions, 9978 flow [2024-06-27 21:00:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:00:01,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 21:00:01,598 INFO L175 Difference]: Start difference. First operand has 349 places, 512 transitions, 8832 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:00:01,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 527 transitions, 9978 flow [2024-06-27 21:00:03,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 527 transitions, 9881 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:03,832 INFO L231 Difference]: Finished difference. Result has 352 places, 514 transitions, 8885 flow [2024-06-27 21:00:03,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8739, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8885, PETRI_PLACES=352, PETRI_TRANSITIONS=514} [2024-06-27 21:00:03,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-27 21:00:03,833 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 514 transitions, 8885 flow [2024-06-27 21:00:03,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:03,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:03,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:03,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:00:03,834 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:03,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1478257537, now seen corresponding path program 4 times [2024-06-27 21:00:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:03,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671437435] [2024-06-27 21:00:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:03,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:04,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:04,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671437435] [2024-06-27 21:00:04,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671437435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:04,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:04,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:04,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307299479] [2024-06-27 21:00:04,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:04,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:04,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:04,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:04,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:04,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:04,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 514 transitions, 8885 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:04,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:04,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:04,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:06,727 INFO L124 PetriNetUnfolderBase]: 4439/7026 cut-off events. [2024-06-27 21:00:06,727 INFO L125 PetriNetUnfolderBase]: For 885782/885782 co-relation queries the response was YES. [2024-06-27 21:00:06,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65118 conditions, 7026 events. 4439/7026 cut-off events. For 885782/885782 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44243 event pairs, 811 based on Foata normal form. 85/7109 useless extension candidates. Maximal degree in co-relation 64948. Up to 5727 conditions per place. [2024-06-27 21:00:06,849 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 435 selfloop transitions, 115 changer transitions 8/563 dead transitions. [2024-06-27 21:00:06,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 563 transitions, 10431 flow [2024-06-27 21:00:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 21:00:06,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-27 21:00:06,850 INFO L175 Difference]: Start difference. First operand has 352 places, 514 transitions, 8885 flow. Second operand 9 states and 194 transitions. [2024-06-27 21:00:06,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 563 transitions, 10431 flow [2024-06-27 21:00:09,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 563 transitions, 10323 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:09,981 INFO L231 Difference]: Finished difference. Result has 358 places, 513 transitions, 9071 flow [2024-06-27 21:00:09,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8777, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9071, PETRI_PLACES=358, PETRI_TRANSITIONS=513} [2024-06-27 21:00:09,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-27 21:00:09,982 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 513 transitions, 9071 flow [2024-06-27 21:00:09,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:09,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:09,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:09,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:00:09,982 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:09,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:09,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1241600809, now seen corresponding path program 5 times [2024-06-27 21:00:09,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:09,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073034062] [2024-06-27 21:00:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:09,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:10,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:10,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073034062] [2024-06-27 21:00:10,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073034062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:10,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:10,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:10,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059918387] [2024-06-27 21:00:10,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:10,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:10,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:10,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:10,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 513 transitions, 9071 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:10,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:10,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:10,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:12,412 INFO L124 PetriNetUnfolderBase]: 4266/6776 cut-off events. [2024-06-27 21:00:12,412 INFO L125 PetriNetUnfolderBase]: For 666739/666739 co-relation queries the response was YES. [2024-06-27 21:00:12,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64364 conditions, 6776 events. 4266/6776 cut-off events. For 666739/666739 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 42824 event pairs, 1024 based on Foata normal form. 2/6776 useless extension candidates. Maximal degree in co-relation 64192. Up to 6440 conditions per place. [2024-06-27 21:00:12,528 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 505 selfloop transitions, 15 changer transitions 0/525 dead transitions. [2024-06-27 21:00:12,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 525 transitions, 10199 flow [2024-06-27 21:00:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:00:12,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 21:00:12,530 INFO L175 Difference]: Start difference. First operand has 358 places, 513 transitions, 9071 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:00:12,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 525 transitions, 10199 flow [2024-06-27 21:00:14,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 525 transitions, 9949 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:14,975 INFO L231 Difference]: Finished difference. Result has 358 places, 515 transitions, 8920 flow [2024-06-27 21:00:14,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8821, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8920, PETRI_PLACES=358, PETRI_TRANSITIONS=515} [2024-06-27 21:00:14,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-27 21:00:14,976 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 515 transitions, 8920 flow [2024-06-27 21:00:14,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:14,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:14,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:14,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:00:14,979 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:14,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:14,979 INFO L85 PathProgramCache]: Analyzing trace with hash 865387417, now seen corresponding path program 1 times [2024-06-27 21:00:14,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:14,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39287653] [2024-06-27 21:00:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:14,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:15,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:15,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39287653] [2024-06-27 21:00:15,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39287653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:15,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:15,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:15,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682601001] [2024-06-27 21:00:15,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:15,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:15,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:15,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:15,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:15,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:15,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 515 transitions, 8920 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:15,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:15,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:15,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:17,543 INFO L124 PetriNetUnfolderBase]: 4271/6787 cut-off events. [2024-06-27 21:00:17,544 INFO L125 PetriNetUnfolderBase]: For 670012/670012 co-relation queries the response was YES. [2024-06-27 21:00:17,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63881 conditions, 6787 events. 4271/6787 cut-off events. For 670012/670012 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42958 event pairs, 831 based on Foata normal form. 1/6786 useless extension candidates. Maximal degree in co-relation 63708. Up to 6361 conditions per place. [2024-06-27 21:00:17,660 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 494 selfloop transitions, 48 changer transitions 0/547 dead transitions. [2024-06-27 21:00:17,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 547 transitions, 10433 flow [2024-06-27 21:00:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:00:17,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:00:17,665 INFO L175 Difference]: Start difference. First operand has 358 places, 515 transitions, 8920 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:00:17,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 547 transitions, 10433 flow [2024-06-27 21:00:20,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 547 transitions, 10350 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:20,216 INFO L231 Difference]: Finished difference. Result has 363 places, 523 transitions, 9159 flow [2024-06-27 21:00:20,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8837, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9159, PETRI_PLACES=363, PETRI_TRANSITIONS=523} [2024-06-27 21:00:20,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-27 21:00:20,216 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 523 transitions, 9159 flow [2024-06-27 21:00:20,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:20,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:20,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:20,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:00:20,217 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:20,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:20,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1480793103, now seen corresponding path program 2 times [2024-06-27 21:00:20,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:20,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844607758] [2024-06-27 21:00:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:20,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:20,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:20,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844607758] [2024-06-27 21:00:20,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844607758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:20,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:20,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265242925] [2024-06-27 21:00:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:20,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:20,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:20,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:20,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:20,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 523 transitions, 9159 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:20,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:20,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:20,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:22,757 INFO L124 PetriNetUnfolderBase]: 4281/6804 cut-off events. [2024-06-27 21:00:22,758 INFO L125 PetriNetUnfolderBase]: For 687448/687448 co-relation queries the response was YES. [2024-06-27 21:00:22,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64561 conditions, 6804 events. 4281/6804 cut-off events. For 687448/687448 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 43136 event pairs, 839 based on Foata normal form. 1/6803 useless extension candidates. Maximal degree in co-relation 64386. Up to 6409 conditions per place. [2024-06-27 21:00:22,876 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 504 selfloop transitions, 40 changer transitions 0/549 dead transitions. [2024-06-27 21:00:22,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 549 transitions, 10418 flow [2024-06-27 21:00:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:00:22,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 21:00:22,877 INFO L175 Difference]: Start difference. First operand has 363 places, 523 transitions, 9159 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:00:22,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 549 transitions, 10418 flow [2024-06-27 21:00:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 549 transitions, 10243 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:25,341 INFO L231 Difference]: Finished difference. Result has 368 places, 529 transitions, 9183 flow [2024-06-27 21:00:25,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9016, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9183, PETRI_PLACES=368, PETRI_TRANSITIONS=529} [2024-06-27 21:00:25,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-27 21:00:25,341 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 529 transitions, 9183 flow [2024-06-27 21:00:25,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:25,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:25,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:25,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:00:25,342 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:25,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1734568265, now seen corresponding path program 3 times [2024-06-27 21:00:25,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:25,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426333055] [2024-06-27 21:00:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:25,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:25,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426333055] [2024-06-27 21:00:25,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426333055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:25,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:25,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384064576] [2024-06-27 21:00:25,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:25,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:25,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:26,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:26,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 529 transitions, 9183 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:26,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:26,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:27,850 INFO L124 PetriNetUnfolderBase]: 4278/6797 cut-off events. [2024-06-27 21:00:27,850 INFO L125 PetriNetUnfolderBase]: For 697511/697511 co-relation queries the response was YES. [2024-06-27 21:00:27,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64558 conditions, 6797 events. 4278/6797 cut-off events. For 697511/697511 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 43016 event pairs, 813 based on Foata normal form. 1/6796 useless extension candidates. Maximal degree in co-relation 64381. Up to 6405 conditions per place. [2024-06-27 21:00:27,960 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 501 selfloop transitions, 38 changer transitions 0/544 dead transitions. [2024-06-27 21:00:27,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 544 transitions, 10307 flow [2024-06-27 21:00:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:00:27,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 21:00:27,961 INFO L175 Difference]: Start difference. First operand has 368 places, 529 transitions, 9183 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:00:27,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 544 transitions, 10307 flow [2024-06-27 21:00:30,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 544 transitions, 10199 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:30,711 INFO L231 Difference]: Finished difference. Result has 371 places, 529 transitions, 9157 flow [2024-06-27 21:00:30,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9075, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9157, PETRI_PLACES=371, PETRI_TRANSITIONS=529} [2024-06-27 21:00:30,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-27 21:00:30,712 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 529 transitions, 9157 flow [2024-06-27 21:00:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:30,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:30,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:30,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:00:30,713 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:30,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1363307549, now seen corresponding path program 1 times [2024-06-27 21:00:30,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:30,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033935603] [2024-06-27 21:00:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:31,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:31,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033935603] [2024-06-27 21:00:31,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033935603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:31,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:31,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:31,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054715073] [2024-06-27 21:00:31,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:31,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:31,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 529 transitions, 9157 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:31,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:31,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:31,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:33,541 INFO L124 PetriNetUnfolderBase]: 4286/6812 cut-off events. [2024-06-27 21:00:33,541 INFO L125 PetriNetUnfolderBase]: For 712703/712703 co-relation queries the response was YES. [2024-06-27 21:00:33,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64596 conditions, 6812 events. 4286/6812 cut-off events. For 712703/712703 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 43057 event pairs, 723 based on Foata normal form. 2/6812 useless extension candidates. Maximal degree in co-relation 64418. Up to 6356 conditions per place. [2024-06-27 21:00:33,643 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 513 selfloop transitions, 42 changer transitions 0/560 dead transitions. [2024-06-27 21:00:33,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 560 transitions, 10605 flow [2024-06-27 21:00:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:00:33,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:00:33,644 INFO L175 Difference]: Start difference. First operand has 371 places, 529 transitions, 9157 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:00:33,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 560 transitions, 10605 flow [2024-06-27 21:00:36,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 560 transitions, 10484 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:36,087 INFO L231 Difference]: Finished difference. Result has 374 places, 534 transitions, 9232 flow [2024-06-27 21:00:36,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9036, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9232, PETRI_PLACES=374, PETRI_TRANSITIONS=534} [2024-06-27 21:00:36,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-27 21:00:36,088 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 534 transitions, 9232 flow [2024-06-27 21:00:36,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:36,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:36,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:36,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:00:36,089 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:36,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:36,089 INFO L85 PathProgramCache]: Analyzing trace with hash -741183837, now seen corresponding path program 2 times [2024-06-27 21:00:36,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:36,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479240646] [2024-06-27 21:00:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:36,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:36,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:36,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479240646] [2024-06-27 21:00:36,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479240646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:36,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:36,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:36,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899428849] [2024-06-27 21:00:36,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:36,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:36,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:36,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:36,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 534 transitions, 9232 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:36,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:36,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:36,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:38,906 INFO L124 PetriNetUnfolderBase]: 4294/6824 cut-off events. [2024-06-27 21:00:38,906 INFO L125 PetriNetUnfolderBase]: For 728431/728431 co-relation queries the response was YES. [2024-06-27 21:00:38,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65012 conditions, 6824 events. 4294/6824 cut-off events. For 728431/728431 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 43222 event pairs, 837 based on Foata normal form. 2/6824 useless extension candidates. Maximal degree in co-relation 64832. Up to 6426 conditions per place. [2024-06-27 21:00:39,004 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 513 selfloop transitions, 39 changer transitions 0/557 dead transitions. [2024-06-27 21:00:39,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 557 transitions, 10444 flow [2024-06-27 21:00:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:00:39,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 21:00:39,005 INFO L175 Difference]: Start difference. First operand has 374 places, 534 transitions, 9232 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:00:39,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 557 transitions, 10444 flow [2024-06-27 21:00:42,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 557 transitions, 10328 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:42,377 INFO L231 Difference]: Finished difference. Result has 378 places, 536 transitions, 9245 flow [2024-06-27 21:00:42,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9132, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9245, PETRI_PLACES=378, PETRI_TRANSITIONS=536} [2024-06-27 21:00:42,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 21:00:42,378 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 536 transitions, 9245 flow [2024-06-27 21:00:42,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:42,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:42,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:42,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:00:42,378 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:42,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:42,379 INFO L85 PathProgramCache]: Analyzing trace with hash 417282741, now seen corresponding path program 3 times [2024-06-27 21:00:42,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:42,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35765314] [2024-06-27 21:00:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:42,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:43,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:43,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35765314] [2024-06-27 21:00:43,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35765314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:43,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:43,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:43,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928148321] [2024-06-27 21:00:43,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:43,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:43,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:43,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:43,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:43,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 536 transitions, 9245 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:43,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:43,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:43,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:44,977 INFO L124 PetriNetUnfolderBase]: 4289/6814 cut-off events. [2024-06-27 21:00:44,977 INFO L125 PetriNetUnfolderBase]: For 735092/735092 co-relation queries the response was YES. [2024-06-27 21:00:45,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64915 conditions, 6814 events. 4289/6814 cut-off events. For 735092/735092 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 43073 event pairs, 810 based on Foata normal form. 2/6814 useless extension candidates. Maximal degree in co-relation 64733. Up to 6419 conditions per place. [2024-06-27 21:00:45,097 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 510 selfloop transitions, 37 changer transitions 0/552 dead transitions. [2024-06-27 21:00:45,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 552 transitions, 10387 flow [2024-06-27 21:00:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:00:45,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 21:00:45,099 INFO L175 Difference]: Start difference. First operand has 378 places, 536 transitions, 9245 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:00:45,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 552 transitions, 10387 flow [2024-06-27 21:00:48,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 552 transitions, 10282 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:48,275 INFO L231 Difference]: Finished difference. Result has 380 places, 536 transitions, 9219 flow [2024-06-27 21:00:48,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9140, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9219, PETRI_PLACES=380, PETRI_TRANSITIONS=536} [2024-06-27 21:00:48,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-27 21:00:48,276 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 536 transitions, 9219 flow [2024-06-27 21:00:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:48,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:48,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:48,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:00:48,276 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:48,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash 543232720, now seen corresponding path program 1 times [2024-06-27 21:00:48,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:48,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904631877] [2024-06-27 21:00:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:48,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:48,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:48,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904631877] [2024-06-27 21:00:48,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904631877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:48,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:48,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:48,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896527039] [2024-06-27 21:00:48,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:48,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:48,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:48,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:48,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:49,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:49,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 536 transitions, 9219 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:49,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:49,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:49,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:50,947 INFO L124 PetriNetUnfolderBase]: 4309/6836 cut-off events. [2024-06-27 21:00:50,947 INFO L125 PetriNetUnfolderBase]: For 760009/760009 co-relation queries the response was YES. [2024-06-27 21:00:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65351 conditions, 6836 events. 4309/6836 cut-off events. For 760009/760009 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 43266 event pairs, 819 based on Foata normal form. 4/6838 useless extension candidates. Maximal degree in co-relation 65168. Up to 6312 conditions per place. [2024-06-27 21:00:51,063 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 494 selfloop transitions, 67 changer transitions 0/566 dead transitions. [2024-06-27 21:00:51,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 566 transitions, 10666 flow [2024-06-27 21:00:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:00:51,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 21:00:51,065 INFO L175 Difference]: Start difference. First operand has 380 places, 536 transitions, 9219 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:00:51,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 566 transitions, 10666 flow [2024-06-27 21:00:55,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 566 transitions, 10585 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:55,137 INFO L231 Difference]: Finished difference. Result has 383 places, 539 transitions, 9364 flow [2024-06-27 21:00:55,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9138, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9364, PETRI_PLACES=383, PETRI_TRANSITIONS=539} [2024-06-27 21:00:55,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-27 21:00:55,137 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 539 transitions, 9364 flow [2024-06-27 21:00:55,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:55,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:55,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:55,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:00:55,138 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:55,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:55,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1234513178, now seen corresponding path program 2 times [2024-06-27 21:00:55,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:55,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803646394] [2024-06-27 21:00:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:55,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:55,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:55,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803646394] [2024-06-27 21:00:55,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803646394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:55,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:55,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:55,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578472171] [2024-06-27 21:00:55,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:55,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:00:55,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 539 transitions, 9364 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:55,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:55,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:00:55,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:57,771 INFO L124 PetriNetUnfolderBase]: 4329/6862 cut-off events. [2024-06-27 21:00:57,772 INFO L125 PetriNetUnfolderBase]: For 777633/777633 co-relation queries the response was YES. [2024-06-27 21:00:57,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66027 conditions, 6862 events. 4329/6862 cut-off events. For 777633/777633 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43424 event pairs, 817 based on Foata normal form. 4/6864 useless extension candidates. Maximal degree in co-relation 65843. Up to 6316 conditions per place. [2024-06-27 21:00:57,892 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 493 selfloop transitions, 72 changer transitions 0/570 dead transitions. [2024-06-27 21:00:57,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 570 transitions, 10831 flow [2024-06-27 21:00:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:00:57,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:00:57,900 INFO L175 Difference]: Start difference. First operand has 383 places, 539 transitions, 9364 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:00:57,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 570 transitions, 10831 flow [2024-06-27 21:01:02,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 570 transitions, 10641 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:02,036 INFO L231 Difference]: Finished difference. Result has 385 places, 542 transitions, 9416 flow [2024-06-27 21:01:02,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9174, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9416, PETRI_PLACES=385, PETRI_TRANSITIONS=542} [2024-06-27 21:01:02,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-27 21:01:02,037 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 542 transitions, 9416 flow [2024-06-27 21:01:02,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:02,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:02,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:02,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:01:02,038 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:02,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1757214853, now seen corresponding path program 1 times [2024-06-27 21:01:02,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:02,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787748225] [2024-06-27 21:01:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:02,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:02,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:02,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787748225] [2024-06-27 21:01:02,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787748225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:02,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:02,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:02,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48767381] [2024-06-27 21:01:02,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:02,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:02,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:02,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:02,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:02,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 542 transitions, 9416 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:02,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:02,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:02,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:04,883 INFO L124 PetriNetUnfolderBase]: 4339/6882 cut-off events. [2024-06-27 21:01:04,883 INFO L125 PetriNetUnfolderBase]: For 784327/784327 co-relation queries the response was YES. [2024-06-27 21:01:04,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66277 conditions, 6882 events. 4339/6882 cut-off events. For 784327/784327 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43561 event pairs, 838 based on Foata normal form. 2/6882 useless extension candidates. Maximal degree in co-relation 66092. Up to 6462 conditions per place. [2024-06-27 21:01:04,991 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 518 selfloop transitions, 46 changer transitions 0/569 dead transitions. [2024-06-27 21:01:04,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 569 transitions, 10826 flow [2024-06-27 21:01:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:01:04,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:01:04,992 INFO L175 Difference]: Start difference. First operand has 385 places, 542 transitions, 9416 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:01:04,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 569 transitions, 10826 flow [2024-06-27 21:01:08,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 569 transitions, 10620 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:08,624 INFO L231 Difference]: Finished difference. Result has 387 places, 546 transitions, 9408 flow [2024-06-27 21:01:08,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9210, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9408, PETRI_PLACES=387, PETRI_TRANSITIONS=546} [2024-06-27 21:01:08,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-27 21:01:08,625 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 546 transitions, 9408 flow [2024-06-27 21:01:08,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:08,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:08,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:08,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:01:08,626 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:08,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1746701851, now seen corresponding path program 1 times [2024-06-27 21:01:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:08,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744448852] [2024-06-27 21:01:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:08,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:09,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744448852] [2024-06-27 21:01:09,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744448852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:09,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:09,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:09,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937264435] [2024-06-27 21:01:09,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:09,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:09,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:09,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:09,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:09,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:09,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 546 transitions, 9408 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:09,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:09,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:09,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:11,367 INFO L124 PetriNetUnfolderBase]: 4354/6903 cut-off events. [2024-06-27 21:01:11,368 INFO L125 PetriNetUnfolderBase]: For 802405/802405 co-relation queries the response was YES. [2024-06-27 21:01:11,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66437 conditions, 6903 events. 4354/6903 cut-off events. For 802405/802405 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 43655 event pairs, 806 based on Foata normal form. 3/6904 useless extension candidates. Maximal degree in co-relation 66251. Up to 6433 conditions per place. [2024-06-27 21:01:11,475 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 509 selfloop transitions, 56 changer transitions 0/570 dead transitions. [2024-06-27 21:01:11,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 570 transitions, 10788 flow [2024-06-27 21:01:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:01:11,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 21:01:11,476 INFO L175 Difference]: Start difference. First operand has 387 places, 546 transitions, 9408 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:01:11,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 570 transitions, 10788 flow [2024-06-27 21:01:15,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 570 transitions, 10645 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:15,084 INFO L231 Difference]: Finished difference. Result has 388 places, 549 transitions, 9471 flow [2024-06-27 21:01:15,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9265, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9471, PETRI_PLACES=388, PETRI_TRANSITIONS=549} [2024-06-27 21:01:15,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-27 21:01:15,085 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 549 transitions, 9471 flow [2024-06-27 21:01:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:15,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:15,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:15,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:01:15,086 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:15,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1739342544, now seen corresponding path program 3 times [2024-06-27 21:01:15,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:15,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161496068] [2024-06-27 21:01:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:15,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:15,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161496068] [2024-06-27 21:01:15,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161496068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:15,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:15,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:15,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785317968] [2024-06-27 21:01:15,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:15,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:15,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:15,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:15,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:15,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 549 transitions, 9471 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:15,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:15,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:15,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:17,692 INFO L124 PetriNetUnfolderBase]: 4374/6937 cut-off events. [2024-06-27 21:01:17,692 INFO L125 PetriNetUnfolderBase]: For 825815/825815 co-relation queries the response was YES. [2024-06-27 21:01:17,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67304 conditions, 6937 events. 4374/6937 cut-off events. For 825815/825815 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 44010 event pairs, 835 based on Foata normal form. 4/6939 useless extension candidates. Maximal degree in co-relation 67117. Up to 6517 conditions per place. [2024-06-27 21:01:18,006 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 528 selfloop transitions, 41 changer transitions 0/574 dead transitions. [2024-06-27 21:01:18,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 574 transitions, 10875 flow [2024-06-27 21:01:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:01:18,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:01:18,007 INFO L175 Difference]: Start difference. First operand has 388 places, 549 transitions, 9471 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:01:18,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 574 transitions, 10875 flow [2024-06-27 21:01:21,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 574 transitions, 10713 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:21,071 INFO L231 Difference]: Finished difference. Result has 390 places, 552 transitions, 9495 flow [2024-06-27 21:01:21,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9309, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9495, PETRI_PLACES=390, PETRI_TRANSITIONS=552} [2024-06-27 21:01:21,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-27 21:01:21,072 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 552 transitions, 9495 flow [2024-06-27 21:01:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:21,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:21,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:21,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:01:21,072 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:21,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 216670036, now seen corresponding path program 4 times [2024-06-27 21:01:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:21,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396253252] [2024-06-27 21:01:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:21,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:21,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396253252] [2024-06-27 21:01:21,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396253252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:21,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:21,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:21,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93111077] [2024-06-27 21:01:21,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:21,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:21,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:21,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:21,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:21,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 552 transitions, 9495 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:21,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:21,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:21,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:23,657 INFO L124 PetriNetUnfolderBase]: 4394/6959 cut-off events. [2024-06-27 21:01:23,658 INFO L125 PetriNetUnfolderBase]: For 829287/829287 co-relation queries the response was YES. [2024-06-27 21:01:23,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67544 conditions, 6959 events. 4394/6959 cut-off events. For 829287/829287 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 44050 event pairs, 853 based on Foata normal form. 4/6961 useless extension candidates. Maximal degree in co-relation 67357. Up to 6567 conditions per place. [2024-06-27 21:01:23,785 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 534 selfloop transitions, 36 changer transitions 0/575 dead transitions. [2024-06-27 21:01:23,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 575 transitions, 10865 flow [2024-06-27 21:01:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:01:23,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 21:01:23,786 INFO L175 Difference]: Start difference. First operand has 390 places, 552 transitions, 9495 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:01:23,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 575 transitions, 10865 flow [2024-06-27 21:01:27,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 575 transitions, 10715 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:27,556 INFO L231 Difference]: Finished difference. Result has 392 places, 555 transitions, 9527 flow [2024-06-27 21:01:27,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9345, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9527, PETRI_PLACES=392, PETRI_TRANSITIONS=555} [2024-06-27 21:01:27,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-27 21:01:27,556 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 555 transitions, 9527 flow [2024-06-27 21:01:27,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:27,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:27,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:27,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:01:27,557 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:27,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1853026808, now seen corresponding path program 5 times [2024-06-27 21:01:27,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:27,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267234781] [2024-06-27 21:01:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:28,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:28,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267234781] [2024-06-27 21:01:28,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267234781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:28,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:28,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:28,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331807627] [2024-06-27 21:01:28,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:28,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:28,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:28,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 555 transitions, 9527 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:28,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:28,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:28,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:30,100 INFO L124 PetriNetUnfolderBase]: 4414/6985 cut-off events. [2024-06-27 21:01:30,100 INFO L125 PetriNetUnfolderBase]: For 846290/846290 co-relation queries the response was YES. [2024-06-27 21:01:30,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67942 conditions, 6985 events. 4414/6985 cut-off events. For 846290/846290 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 44291 event pairs, 839 based on Foata normal form. 4/6987 useless extension candidates. Maximal degree in co-relation 67754. Up to 6529 conditions per place. [2024-06-27 21:01:30,219 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 526 selfloop transitions, 49 changer transitions 0/580 dead transitions. [2024-06-27 21:01:30,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 580 transitions, 10955 flow [2024-06-27 21:01:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:01:30,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 21:01:30,221 INFO L175 Difference]: Start difference. First operand has 392 places, 555 transitions, 9527 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:01:30,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 580 transitions, 10955 flow [2024-06-27 21:01:33,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 580 transitions, 10809 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:33,531 INFO L231 Difference]: Finished difference. Result has 394 places, 558 transitions, 9595 flow [2024-06-27 21:01:33,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9381, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9595, PETRI_PLACES=394, PETRI_TRANSITIONS=558} [2024-06-27 21:01:33,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-27 21:01:33,532 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 558 transitions, 9595 flow [2024-06-27 21:01:33,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:33,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:33,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:33,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:01:33,533 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:33,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:33,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1739336809, now seen corresponding path program 2 times [2024-06-27 21:01:33,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:33,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028903934] [2024-06-27 21:01:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:33,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:34,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:34,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028903934] [2024-06-27 21:01:34,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028903934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:34,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:34,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074662573] [2024-06-27 21:01:34,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:34,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:34,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:34,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:34,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 558 transitions, 9595 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:34,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:34,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:34,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:36,468 INFO L124 PetriNetUnfolderBase]: 4424/7011 cut-off events. [2024-06-27 21:01:36,468 INFO L125 PetriNetUnfolderBase]: For 853030/853030 co-relation queries the response was YES. [2024-06-27 21:01:36,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68202 conditions, 7011 events. 4424/7011 cut-off events. For 853030/853030 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 44478 event pairs, 856 based on Foata normal form. 2/7011 useless extension candidates. Maximal degree in co-relation 68013. Up to 6635 conditions per place. [2024-06-27 21:01:36,573 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 30 changer transitions 0/580 dead transitions. [2024-06-27 21:01:36,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 580 transitions, 10964 flow [2024-06-27 21:01:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:01:36,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:01:36,575 INFO L175 Difference]: Start difference. First operand has 394 places, 558 transitions, 9595 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:01:36,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 580 transitions, 10964 flow [2024-06-27 21:01:39,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 580 transitions, 10786 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:39,706 INFO L231 Difference]: Finished difference. Result has 396 places, 562 transitions, 9591 flow [2024-06-27 21:01:39,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9417, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9591, PETRI_PLACES=396, PETRI_TRANSITIONS=562} [2024-06-27 21:01:39,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-27 21:01:39,707 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 562 transitions, 9591 flow [2024-06-27 21:01:39,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:39,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:39,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:01:39,707 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:39,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -705981653, now seen corresponding path program 4 times [2024-06-27 21:01:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502165791] [2024-06-27 21:01:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:40,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502165791] [2024-06-27 21:01:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502165791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:40,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:40,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:40,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981066297] [2024-06-27 21:01:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:40,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:40,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:40,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:40,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 562 transitions, 9591 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:40,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:40,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:40,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:42,638 INFO L124 PetriNetUnfolderBase]: 4419/7000 cut-off events. [2024-06-27 21:01:42,638 INFO L125 PetriNetUnfolderBase]: For 862386/862386 co-relation queries the response was YES. [2024-06-27 21:01:42,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67875 conditions, 7000 events. 4419/7000 cut-off events. For 862386/862386 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 44396 event pairs, 848 based on Foata normal form. 3/7001 useless extension candidates. Maximal degree in co-relation 67685. Up to 6566 conditions per place. [2024-06-27 21:01:42,742 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 528 selfloop transitions, 56 changer transitions 0/589 dead transitions. [2024-06-27 21:01:42,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 589 transitions, 10921 flow [2024-06-27 21:01:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 21:01:42,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-27 21:01:42,743 INFO L175 Difference]: Start difference. First operand has 396 places, 562 transitions, 9591 flow. Second operand 7 states and 145 transitions. [2024-06-27 21:01:42,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 589 transitions, 10921 flow [2024-06-27 21:01:46,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 589 transitions, 10780 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:46,269 INFO L231 Difference]: Finished difference. Result has 396 places, 565 transitions, 9665 flow [2024-06-27 21:01:46,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9450, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9665, PETRI_PLACES=396, PETRI_TRANSITIONS=565} [2024-06-27 21:01:46,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-27 21:01:46,270 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 565 transitions, 9665 flow [2024-06-27 21:01:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:46,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:46,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:46,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:01:46,270 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:46,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash -794792104, now seen corresponding path program 6 times [2024-06-27 21:01:46,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:46,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129070641] [2024-06-27 21:01:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:46,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:46,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:46,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129070641] [2024-06-27 21:01:46,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129070641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:46,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:46,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:46,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584594922] [2024-06-27 21:01:46,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:46,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:46,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:46,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:47,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:47,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 565 transitions, 9665 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:47,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:47,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:47,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:48,896 INFO L124 PetriNetUnfolderBase]: 4439/7020 cut-off events. [2024-06-27 21:01:48,896 INFO L125 PetriNetUnfolderBase]: For 886668/886668 co-relation queries the response was YES. [2024-06-27 21:01:48,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68480 conditions, 7020 events. 4439/7020 cut-off events. For 886668/886668 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 44434 event pairs, 757 based on Foata normal form. 4/7018 useless extension candidates. Maximal degree in co-relation 68289. Up to 5666 conditions per place. [2024-06-27 21:01:49,205 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 406 selfloop transitions, 188 changer transitions 0/599 dead transitions. [2024-06-27 21:01:49,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 599 transitions, 11662 flow [2024-06-27 21:01:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:01:49,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-27 21:01:49,207 INFO L175 Difference]: Start difference. First operand has 396 places, 565 transitions, 9665 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:01:49,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 599 transitions, 11662 flow [2024-06-27 21:01:53,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 599 transitions, 11468 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:53,143 INFO L231 Difference]: Finished difference. Result has 398 places, 568 transitions, 9967 flow [2024-06-27 21:01:53,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9475, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9967, PETRI_PLACES=398, PETRI_TRANSITIONS=568} [2024-06-27 21:01:53,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-27 21:01:53,144 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 568 transitions, 9967 flow [2024-06-27 21:01:53,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:53,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:53,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:53,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:01:53,144 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:53,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:53,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1726888062, now seen corresponding path program 7 times [2024-06-27 21:01:53,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:53,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199699834] [2024-06-27 21:01:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:53,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:53,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199699834] [2024-06-27 21:01:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199699834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:53,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602928570] [2024-06-27 21:01:53,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:53,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:53,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:53,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:01:53,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 568 transitions, 9967 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:53,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:53,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:01:53,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:55,884 INFO L124 PetriNetUnfolderBase]: 4427/7010 cut-off events. [2024-06-27 21:01:55,885 INFO L125 PetriNetUnfolderBase]: For 870697/870697 co-relation queries the response was YES. [2024-06-27 21:01:55,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68464 conditions, 7010 events. 4427/7010 cut-off events. For 870697/870697 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 44447 event pairs, 755 based on Foata normal form. 4/7008 useless extension candidates. Maximal degree in co-relation 68274. Up to 5658 conditions per place. [2024-06-27 21:01:56,003 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 407 selfloop transitions, 188 changer transitions 0/600 dead transitions. [2024-06-27 21:01:56,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 600 transitions, 11862 flow [2024-06-27 21:01:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 21:01:56,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 21:01:56,004 INFO L175 Difference]: Start difference. First operand has 398 places, 568 transitions, 9967 flow. Second operand 9 states and 177 transitions. [2024-06-27 21:01:56,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 600 transitions, 11862 flow [2024-06-27 21:01:59,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 600 transitions, 11521 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:59,735 INFO L231 Difference]: Finished difference. Result has 401 places, 568 transitions, 10008 flow [2024-06-27 21:01:59,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9626, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10008, PETRI_PLACES=401, PETRI_TRANSITIONS=568} [2024-06-27 21:01:59,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-27 21:01:59,735 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 568 transitions, 10008 flow [2024-06-27 21:01:59,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:59,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:59,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:59,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:01:59,736 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:59,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:59,736 INFO L85 PathProgramCache]: Analyzing trace with hash 53771039, now seen corresponding path program 3 times [2024-06-27 21:01:59,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:59,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779519377] [2024-06-27 21:01:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:59,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:00,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:00,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779519377] [2024-06-27 21:02:00,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779519377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:00,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:00,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:00,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261227931] [2024-06-27 21:02:00,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:00,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:00,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:00,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:02:00,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 568 transitions, 10008 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:00,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:00,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:02:00,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:02,599 INFO L124 PetriNetUnfolderBase]: 4421/7005 cut-off events. [2024-06-27 21:02:02,599 INFO L125 PetriNetUnfolderBase]: For 869546/869546 co-relation queries the response was YES. [2024-06-27 21:02:02,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68209 conditions, 7005 events. 4421/7005 cut-off events. For 869546/869546 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 44474 event pairs, 851 based on Foata normal form. 2/7001 useless extension candidates. Maximal degree in co-relation 68018. Up to 6370 conditions per place. [2024-06-27 21:02:02,716 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 494 selfloop transitions, 93 changer transitions 0/592 dead transitions. [2024-06-27 21:02:02,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 592 transitions, 11437 flow [2024-06-27 21:02:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:02:02,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 21:02:02,717 INFO L175 Difference]: Start difference. First operand has 401 places, 568 transitions, 10008 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:02:02,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 592 transitions, 11437 flow [2024-06-27 21:02:06,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 592 transitions, 10612 flow, removed 55 selfloop flow, removed 11 redundant places. [2024-06-27 21:02:06,508 INFO L231 Difference]: Finished difference. Result has 399 places, 568 transitions, 9376 flow [2024-06-27 21:02:06,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9183, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9376, PETRI_PLACES=399, PETRI_TRANSITIONS=568} [2024-06-27 21:02:06,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-27 21:02:06,509 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 568 transitions, 9376 flow [2024-06-27 21:02:06,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:06,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:06,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:06,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:02:06,509 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:06,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1369759715, now seen corresponding path program 4 times [2024-06-27 21:02:06,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:06,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219073446] [2024-06-27 21:02:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:07,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219073446] [2024-06-27 21:02:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219073446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:07,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:07,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:07,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171630629] [2024-06-27 21:02:07,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:07,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:07,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:07,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:02:07,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 568 transitions, 9376 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:07,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:07,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:02:07,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:09,265 INFO L124 PetriNetUnfolderBase]: 4439/7026 cut-off events. [2024-06-27 21:02:09,265 INFO L125 PetriNetUnfolderBase]: For 883072/883072 co-relation queries the response was YES. [2024-06-27 21:02:09,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67169 conditions, 7026 events. 4439/7026 cut-off events. For 883072/883072 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 44536 event pairs, 844 based on Foata normal form. 2/7022 useless extension candidates. Maximal degree in co-relation 66979. Up to 6257 conditions per place. [2024-06-27 21:02:09,368 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 460 selfloop transitions, 142 changer transitions 0/607 dead transitions. [2024-06-27 21:02:09,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 607 transitions, 11237 flow [2024-06-27 21:02:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 21:02:09,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:02:09,369 INFO L175 Difference]: Start difference. First operand has 399 places, 568 transitions, 9376 flow. Second operand 10 states and 190 transitions. [2024-06-27 21:02:09,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 607 transitions, 11237 flow [2024-06-27 21:02:13,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 607 transitions, 10950 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 21:02:13,253 INFO L231 Difference]: Finished difference. Result has 401 places, 576 transitions, 9633 flow [2024-06-27 21:02:13,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9089, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9633, PETRI_PLACES=401, PETRI_TRANSITIONS=576} [2024-06-27 21:02:13,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-27 21:02:13,254 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 576 transitions, 9633 flow [2024-06-27 21:02:13,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:13,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:13,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:13,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:02:13,255 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:13,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1370117765, now seen corresponding path program 5 times [2024-06-27 21:02:13,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:13,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894822719] [2024-06-27 21:02:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:13,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:14,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:14,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894822719] [2024-06-27 21:02:14,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894822719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:14,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:14,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:14,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261053577] [2024-06-27 21:02:14,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:14,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:14,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:14,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:02:14,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 576 transitions, 9633 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:14,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:14,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:02:14,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:16,262 INFO L124 PetriNetUnfolderBase]: 4449/7042 cut-off events. [2024-06-27 21:02:16,262 INFO L125 PetriNetUnfolderBase]: For 909342/909342 co-relation queries the response was YES. [2024-06-27 21:02:16,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68380 conditions, 7042 events. 4449/7042 cut-off events. For 909342/909342 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44736 event pairs, 846 based on Foata normal form. 2/7038 useless extension candidates. Maximal degree in co-relation 68190. Up to 6324 conditions per place. [2024-06-27 21:02:16,371 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 463 selfloop transitions, 140 changer transitions 0/608 dead transitions. [2024-06-27 21:02:16,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 608 transitions, 11223 flow [2024-06-27 21:02:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:02:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:02:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 21:02:16,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 21:02:16,372 INFO L175 Difference]: Start difference. First operand has 401 places, 576 transitions, 9633 flow. Second operand 11 states and 201 transitions. [2024-06-27 21:02:16,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 608 transitions, 11223 flow [2024-06-27 21:02:21,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 608 transitions, 10887 flow, removed 104 selfloop flow, removed 5 redundant places. [2024-06-27 21:02:21,139 INFO L231 Difference]: Finished difference. Result has 407 places, 580 transitions, 9713 flow [2024-06-27 21:02:21,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9351, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9713, PETRI_PLACES=407, PETRI_TRANSITIONS=580} [2024-06-27 21:02:21,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-27 21:02:21,140 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 580 transitions, 9713 flow [2024-06-27 21:02:21,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:21,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:21,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:21,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:02:21,140 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:21,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash -565759144, now seen corresponding path program 8 times [2024-06-27 21:02:21,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:21,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620056979] [2024-06-27 21:02:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:21,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:21,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:21,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620056979] [2024-06-27 21:02:21,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620056979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:21,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:21,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:21,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138594962] [2024-06-27 21:02:21,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:21,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:21,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:21,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:02:21,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 580 transitions, 9713 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:21,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:21,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:02:21,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:23,998 INFO L124 PetriNetUnfolderBase]: 4469/7059 cut-off events. [2024-06-27 21:02:23,998 INFO L125 PetriNetUnfolderBase]: For 938788/938788 co-relation queries the response was YES. [2024-06-27 21:02:24,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68978 conditions, 7059 events. 4469/7059 cut-off events. For 938788/938788 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 44747 event pairs, 732 based on Foata normal form. 4/7057 useless extension candidates. Maximal degree in co-relation 68786. Up to 5705 conditions per place. [2024-06-27 21:02:24,107 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 402 selfloop transitions, 206 changer transitions 0/613 dead transitions. [2024-06-27 21:02:24,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 613 transitions, 11723 flow [2024-06-27 21:02:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:02:24,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-27 21:02:24,108 INFO L175 Difference]: Start difference. First operand has 407 places, 580 transitions, 9713 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:02:24,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 613 transitions, 11723 flow [2024-06-27 21:02:28,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 613 transitions, 11403 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 21:02:28,238 INFO L231 Difference]: Finished difference. Result has 407 places, 583 transitions, 9893 flow [2024-06-27 21:02:28,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9893, PETRI_PLACES=407, PETRI_TRANSITIONS=583} [2024-06-27 21:02:28,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-27 21:02:28,239 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 583 transitions, 9893 flow [2024-06-27 21:02:28,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:28,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:28,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:28,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:02:28,239 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:28,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1468535170, now seen corresponding path program 9 times [2024-06-27 21:02:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:28,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261514243] [2024-06-27 21:02:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:28,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:28,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261514243] [2024-06-27 21:02:28,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261514243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:28,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:28,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:28,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395353228] [2024-06-27 21:02:28,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:28,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:28,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:29,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:02:29,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 583 transitions, 9893 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:29,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:29,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:02:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:31,036 INFO L124 PetriNetUnfolderBase]: 4457/7043 cut-off events. [2024-06-27 21:02:31,036 INFO L125 PetriNetUnfolderBase]: For 939161/939161 co-relation queries the response was YES. [2024-06-27 21:02:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69003 conditions, 7043 events. 4457/7043 cut-off events. For 939161/939161 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 44599 event pairs, 724 based on Foata normal form. 4/7041 useless extension candidates. Maximal degree in co-relation 68810. Up to 5697 conditions per place. [2024-06-27 21:02:31,162 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 403 selfloop transitions, 206 changer transitions 0/614 dead transitions. [2024-06-27 21:02:31,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 614 transitions, 11833 flow [2024-06-27 21:02:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 21:02:31,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 21:02:31,164 INFO L175 Difference]: Start difference. First operand has 407 places, 583 transitions, 9893 flow. Second operand 9 states and 177 transitions. [2024-06-27 21:02:31,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 614 transitions, 11833 flow [2024-06-27 21:02:35,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 614 transitions, 11485 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:35,320 INFO L231 Difference]: Finished difference. Result has 410 places, 583 transitions, 9963 flow [2024-06-27 21:02:35,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9545, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9963, PETRI_PLACES=410, PETRI_TRANSITIONS=583} [2024-06-27 21:02:35,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-27 21:02:35,321 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 583 transitions, 9963 flow [2024-06-27 21:02:35,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:35,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:35,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:35,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:02:35,322 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:35,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:35,322 INFO L85 PathProgramCache]: Analyzing trace with hash 739325514, now seen corresponding path program 10 times [2024-06-27 21:02:35,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:35,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863004463] [2024-06-27 21:02:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:36,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:36,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863004463] [2024-06-27 21:02:36,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863004463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:36,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:36,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:36,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9004276] [2024-06-27 21:02:36,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:36,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:36,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:36,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:02:36,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 583 transitions, 9963 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:36,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:36,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:02:36,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:38,291 INFO L124 PetriNetUnfolderBase]: 4445/7035 cut-off events. [2024-06-27 21:02:38,291 INFO L125 PetriNetUnfolderBase]: For 934291/934291 co-relation queries the response was YES. [2024-06-27 21:02:38,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68540 conditions, 7035 events. 4445/7035 cut-off events. For 934291/934291 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 44676 event pairs, 953 based on Foata normal form. 4/7037 useless extension candidates. Maximal degree in co-relation 68346. Up to 6510 conditions per place. [2024-06-27 21:02:38,414 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 59 changer transitions 0/609 dead transitions. [2024-06-27 21:02:38,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 609 transitions, 11615 flow [2024-06-27 21:02:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 21:02:38,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-27 21:02:38,415 INFO L175 Difference]: Start difference. First operand has 410 places, 583 transitions, 9963 flow. Second operand 10 states and 184 transitions. [2024-06-27 21:02:38,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 609 transitions, 11615 flow [2024-06-27 21:02:43,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 609 transitions, 10839 flow, removed 38 selfloop flow, removed 11 redundant places. [2024-06-27 21:02:43,388 INFO L231 Difference]: Finished difference. Result has 409 places, 583 transitions, 9311 flow [2024-06-27 21:02:43,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9187, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9311, PETRI_PLACES=409, PETRI_TRANSITIONS=583} [2024-06-27 21:02:43,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-27 21:02:43,389 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 583 transitions, 9311 flow [2024-06-27 21:02:43,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:43,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:43,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:43,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:02:43,389 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:43,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:43,390 INFO L85 PathProgramCache]: Analyzing trace with hash 748039614, now seen corresponding path program 11 times [2024-06-27 21:02:43,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:43,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609003386] [2024-06-27 21:02:43,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:43,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:44,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:44,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609003386] [2024-06-27 21:02:44,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609003386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:44,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:44,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077110826] [2024-06-27 21:02:44,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:44,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:44,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:44,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:02:44,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 583 transitions, 9311 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:44,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:44,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:02:44,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:46,175 INFO L124 PetriNetUnfolderBase]: 4433/7009 cut-off events. [2024-06-27 21:02:46,175 INFO L125 PetriNetUnfolderBase]: For 921640/921640 co-relation queries the response was YES. [2024-06-27 21:02:46,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66754 conditions, 7009 events. 4433/7009 cut-off events. For 921640/921640 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 44506 event pairs, 955 based on Foata normal form. 4/7011 useless extension candidates. Maximal degree in co-relation 66561. Up to 6502 conditions per place. [2024-06-27 21:02:46,287 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 544 selfloop transitions, 59 changer transitions 0/608 dead transitions. [2024-06-27 21:02:46,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 608 transitions, 10757 flow [2024-06-27 21:02:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:02:46,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-27 21:02:46,288 INFO L175 Difference]: Start difference. First operand has 409 places, 583 transitions, 9311 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:02:46,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 608 transitions, 10757 flow [2024-06-27 21:02:51,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 608 transitions, 10597 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 21:02:51,088 INFO L231 Difference]: Finished difference. Result has 410 places, 583 transitions, 9275 flow [2024-06-27 21:02:51,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9151, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9275, PETRI_PLACES=410, PETRI_TRANSITIONS=583} [2024-06-27 21:02:51,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-27 21:02:51,088 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 583 transitions, 9275 flow [2024-06-27 21:02:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:51,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:51,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:51,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:02:51,089 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 747890659, now seen corresponding path program 6 times [2024-06-27 21:02:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:51,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819203600] [2024-06-27 21:02:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:51,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:51,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:51,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819203600] [2024-06-27 21:02:51,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819203600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:51,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:51,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:02:51,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608207096] [2024-06-27 21:02:51,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:51,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:02:51,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:02:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:02:52,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:02:52,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 583 transitions, 9275 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:52,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:52,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:02:52,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:54,050 INFO L124 PetriNetUnfolderBase]: 4463/7051 cut-off events. [2024-06-27 21:02:54,050 INFO L125 PetriNetUnfolderBase]: For 950698/950698 co-relation queries the response was YES. [2024-06-27 21:02:54,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67287 conditions, 7051 events. 4463/7051 cut-off events. For 950698/950698 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 44652 event pairs, 977 based on Foata normal form. 6/7055 useless extension candidates. Maximal degree in co-relation 67093. Up to 6581 conditions per place. [2024-06-27 21:02:54,165 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 541 selfloop transitions, 66 changer transitions 0/612 dead transitions. [2024-06-27 21:02:54,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 612 transitions, 10763 flow [2024-06-27 21:02:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:02:54,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:02:54,167 INFO L175 Difference]: Start difference. First operand has 410 places, 583 transitions, 9275 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:02:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 612 transitions, 10763 flow [2024-06-27 21:02:59,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 612 transitions, 10583 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 21:02:59,156 INFO L231 Difference]: Finished difference. Result has 410 places, 591 transitions, 9453 flow [2024-06-27 21:02:59,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9453, PETRI_PLACES=410, PETRI_TRANSITIONS=591} [2024-06-27 21:02:59,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-27 21:02:59,156 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 591 transitions, 9453 flow [2024-06-27 21:02:59,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:59,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:59,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:59,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:02:59,157 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:59,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash 155868555, now seen corresponding path program 2 times [2024-06-27 21:02:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228106999] [2024-06-27 21:02:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:59,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:59,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228106999] [2024-06-27 21:02:59,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228106999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:59,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:59,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:59,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576093966] [2024-06-27 21:02:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:59,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:00,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:00,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 591 transitions, 9453 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:00,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:00,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:00,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:01,987 INFO L124 PetriNetUnfolderBase]: 4467/7075 cut-off events. [2024-06-27 21:03:01,987 INFO L125 PetriNetUnfolderBase]: For 951727/951727 co-relation queries the response was YES. [2024-06-27 21:03:02,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67940 conditions, 7075 events. 4467/7075 cut-off events. For 951727/951727 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 44905 event pairs, 802 based on Foata normal form. 4/7077 useless extension candidates. Maximal degree in co-relation 67746. Up to 6311 conditions per place. [2024-06-27 21:03:02,104 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 489 selfloop transitions, 127 changer transitions 0/621 dead transitions. [2024-06-27 21:03:02,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 621 transitions, 11130 flow [2024-06-27 21:03:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 21:03:02,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-27 21:03:02,113 INFO L175 Difference]: Start difference. First operand has 410 places, 591 transitions, 9453 flow. Second operand 7 states and 149 transitions. [2024-06-27 21:03:02,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 621 transitions, 11130 flow [2024-06-27 21:03:07,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 621 transitions, 10856 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:07,426 INFO L231 Difference]: Finished difference. Result has 409 places, 596 transitions, 9600 flow [2024-06-27 21:03:07,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9179, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9600, PETRI_PLACES=409, PETRI_TRANSITIONS=596} [2024-06-27 21:03:07,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-27 21:03:07,427 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 596 transitions, 9600 flow [2024-06-27 21:03:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:07,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:07,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:07,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:03:07,427 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:07,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1301033749, now seen corresponding path program 3 times [2024-06-27 21:03:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:07,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140834286] [2024-06-27 21:03:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:07,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:08,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140834286] [2024-06-27 21:03:08,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140834286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:08,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:08,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938766548] [2024-06-27 21:03:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:08,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:08,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:08,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 596 transitions, 9600 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:08,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:08,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:08,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:10,147 INFO L124 PetriNetUnfolderBase]: 4455/7056 cut-off events. [2024-06-27 21:03:10,148 INFO L125 PetriNetUnfolderBase]: For 946739/946739 co-relation queries the response was YES. [2024-06-27 21:03:10,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67733 conditions, 7056 events. 4455/7056 cut-off events. For 946739/946739 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 44774 event pairs, 815 based on Foata normal form. 2/7056 useless extension candidates. Maximal degree in co-relation 67538. Up to 6558 conditions per place. [2024-06-27 21:03:10,258 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 74 changer transitions 0/615 dead transitions. [2024-06-27 21:03:10,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 615 transitions, 10909 flow [2024-06-27 21:03:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:03:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:03:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-27 21:03:10,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-27 21:03:10,260 INFO L175 Difference]: Start difference. First operand has 409 places, 596 transitions, 9600 flow. Second operand 6 states and 124 transitions. [2024-06-27 21:03:10,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 615 transitions, 10909 flow [2024-06-27 21:03:14,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 615 transitions, 10629 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:14,450 INFO L231 Difference]: Finished difference. Result has 410 places, 596 transitions, 9528 flow [2024-06-27 21:03:14,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9330, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9528, PETRI_PLACES=410, PETRI_TRANSITIONS=596} [2024-06-27 21:03:14,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-27 21:03:14,451 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 596 transitions, 9528 flow [2024-06-27 21:03:14,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:14,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:14,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:14,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:03:14,451 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:14,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1418796070, now seen corresponding path program 12 times [2024-06-27 21:03:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:14,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085172835] [2024-06-27 21:03:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:14,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085172835] [2024-06-27 21:03:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085172835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:15,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:15,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:15,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680417439] [2024-06-27 21:03:15,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:15,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:15,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:15,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:15,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 596 transitions, 9528 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:15,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:15,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:15,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:17,197 INFO L124 PetriNetUnfolderBase]: 4443/7026 cut-off events. [2024-06-27 21:03:17,197 INFO L125 PetriNetUnfolderBase]: For 938369/938369 co-relation queries the response was YES. [2024-06-27 21:03:17,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66810 conditions, 7026 events. 4443/7026 cut-off events. For 938369/938369 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 44525 event pairs, 778 based on Foata normal form. 4/7028 useless extension candidates. Maximal degree in co-relation 66615. Up to 6219 conditions per place. [2024-06-27 21:03:17,311 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 507 selfloop transitions, 117 changer transitions 0/629 dead transitions. [2024-06-27 21:03:17,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 629 transitions, 11276 flow [2024-06-27 21:03:17,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 21:03:17,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-27 21:03:17,313 INFO L175 Difference]: Start difference. First operand has 410 places, 596 transitions, 9528 flow. Second operand 9 states and 179 transitions. [2024-06-27 21:03:17,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 629 transitions, 11276 flow [2024-06-27 21:03:21,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 629 transitions, 10960 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 21:03:21,750 INFO L231 Difference]: Finished difference. Result has 412 places, 596 transitions, 9458 flow [2024-06-27 21:03:21,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9218, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9458, PETRI_PLACES=412, PETRI_TRANSITIONS=596} [2024-06-27 21:03:21,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-27 21:03:21,751 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 596 transitions, 9458 flow [2024-06-27 21:03:21,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:21,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:21,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:21,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:03:21,752 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:21,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1009405934, now seen corresponding path program 13 times [2024-06-27 21:03:21,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:21,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503537037] [2024-06-27 21:03:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:21,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:22,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:22,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503537037] [2024-06-27 21:03:22,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503537037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:22,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:22,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045271972] [2024-06-27 21:03:22,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:22,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:22,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:22,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:22,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 596 transitions, 9458 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:22,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:22,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:22,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:24,561 INFO L124 PetriNetUnfolderBase]: 4463/7066 cut-off events. [2024-06-27 21:03:24,561 INFO L125 PetriNetUnfolderBase]: For 905743/905743 co-relation queries the response was YES. [2024-06-27 21:03:24,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66845 conditions, 7066 events. 4463/7066 cut-off events. For 905743/905743 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44879 event pairs, 836 based on Foata normal form. 4/7068 useless extension candidates. Maximal degree in co-relation 66650. Up to 6604 conditions per place. [2024-06-27 21:03:24,666 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 567 selfloop transitions, 52 changer transitions 0/624 dead transitions. [2024-06-27 21:03:24,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 624 transitions, 10982 flow [2024-06-27 21:03:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:03:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:03:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:03:24,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 21:03:24,667 INFO L175 Difference]: Start difference. First operand has 412 places, 596 transitions, 9458 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:03:24,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 624 transitions, 10982 flow [2024-06-27 21:03:29,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 624 transitions, 10774 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:03:29,012 INFO L231 Difference]: Finished difference. Result has 413 places, 599 transitions, 9437 flow [2024-06-27 21:03:29,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9256, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9437, PETRI_PLACES=413, PETRI_TRANSITIONS=599} [2024-06-27 21:03:29,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-27 21:03:29,013 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 599 transitions, 9437 flow [2024-06-27 21:03:29,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:29,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:29,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:29,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:03:29,013 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:29,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:29,014 INFO L85 PathProgramCache]: Analyzing trace with hash 664811530, now seen corresponding path program 14 times [2024-06-27 21:03:29,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:29,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749745485] [2024-06-27 21:03:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:29,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749745485] [2024-06-27 21:03:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749745485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:29,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326160629] [2024-06-27 21:03:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:29,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:29,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:29,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:29,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 599 transitions, 9437 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:29,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:29,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:29,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:31,710 INFO L124 PetriNetUnfolderBase]: 4483/7096 cut-off events. [2024-06-27 21:03:31,710 INFO L125 PetriNetUnfolderBase]: For 923203/923203 co-relation queries the response was YES. [2024-06-27 21:03:31,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66945 conditions, 7096 events. 4483/7096 cut-off events. For 923203/923203 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 45130 event pairs, 810 based on Foata normal form. 4/7098 useless extension candidates. Maximal degree in co-relation 66750. Up to 6251 conditions per place. [2024-06-27 21:03:32,028 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 517 selfloop transitions, 114 changer transitions 0/636 dead transitions. [2024-06-27 21:03:32,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 636 transitions, 11281 flow [2024-06-27 21:03:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 21:03:32,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-27 21:03:32,029 INFO L175 Difference]: Start difference. First operand has 413 places, 599 transitions, 9437 flow. Second operand 9 states and 179 transitions. [2024-06-27 21:03:32,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 636 transitions, 11281 flow [2024-06-27 21:03:36,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 636 transitions, 11139 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:36,441 INFO L231 Difference]: Finished difference. Result has 416 places, 602 transitions, 9600 flow [2024-06-27 21:03:36,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9295, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9600, PETRI_PLACES=416, PETRI_TRANSITIONS=602} [2024-06-27 21:03:36,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-27 21:03:36,441 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 602 transitions, 9600 flow [2024-06-27 21:03:36,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:36,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:36,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:03:36,442 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:36,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash 673376675, now seen corresponding path program 7 times [2024-06-27 21:03:36,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:36,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267048407] [2024-06-27 21:03:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:37,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:37,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267048407] [2024-06-27 21:03:37,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267048407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:37,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:37,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:37,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057815425] [2024-06-27 21:03:37,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:37,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:37,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:37,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:37,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 602 transitions, 9600 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:37,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:37,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:37,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:39,353 INFO L124 PetriNetUnfolderBase]: 4497/7124 cut-off events. [2024-06-27 21:03:39,353 INFO L125 PetriNetUnfolderBase]: For 939967/939967 co-relation queries the response was YES. [2024-06-27 21:03:39,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67378 conditions, 7124 events. 4497/7124 cut-off events. For 939967/939967 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 45282 event pairs, 842 based on Foata normal form. 6/7128 useless extension candidates. Maximal degree in co-relation 67182. Up to 6396 conditions per place. [2024-06-27 21:03:39,458 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 523 selfloop transitions, 113 changer transitions 0/641 dead transitions. [2024-06-27 21:03:39,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 641 transitions, 11157 flow [2024-06-27 21:03:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 21:03:39,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-27 21:03:39,460 INFO L175 Difference]: Start difference. First operand has 416 places, 602 transitions, 9600 flow. Second operand 9 states and 188 transitions. [2024-06-27 21:03:39,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 641 transitions, 11157 flow [2024-06-27 21:03:43,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 641 transitions, 10915 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:43,813 INFO L231 Difference]: Finished difference. Result has 419 places, 606 transitions, 9748 flow [2024-06-27 21:03:43,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9358, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9748, PETRI_PLACES=419, PETRI_TRANSITIONS=606} [2024-06-27 21:03:43,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-27 21:03:43,814 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 606 transitions, 9748 flow [2024-06-27 21:03:43,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:43,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:43,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:43,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:03:43,815 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:43,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash -693855724, now seen corresponding path program 15 times [2024-06-27 21:03:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268942338] [2024-06-27 21:03:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:43,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:44,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:44,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268942338] [2024-06-27 21:03:44,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268942338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:44,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:44,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335222470] [2024-06-27 21:03:44,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:44,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:44,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 606 transitions, 9748 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:44,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:44,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:44,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:46,496 INFO L124 PetriNetUnfolderBase]: 4485/7106 cut-off events. [2024-06-27 21:03:46,496 INFO L125 PetriNetUnfolderBase]: For 930745/930745 co-relation queries the response was YES. [2024-06-27 21:03:46,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67543 conditions, 7106 events. 4485/7106 cut-off events. For 930745/930745 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 45237 event pairs, 848 based on Foata normal form. 4/7108 useless extension candidates. Maximal degree in co-relation 67346. Up to 6708 conditions per place. [2024-06-27 21:03:46,627 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 589 selfloop transitions, 31 changer transitions 0/625 dead transitions. [2024-06-27 21:03:46,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 625 transitions, 11134 flow [2024-06-27 21:03:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:03:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:03:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:03:46,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 21:03:46,628 INFO L175 Difference]: Start difference. First operand has 419 places, 606 transitions, 9748 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:03:46,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 625 transitions, 11134 flow [2024-06-27 21:03:51,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 625 transitions, 10848 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:51,694 INFO L231 Difference]: Finished difference. Result has 421 places, 606 transitions, 9530 flow [2024-06-27 21:03:51,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9462, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9530, PETRI_PLACES=421, PETRI_TRANSITIONS=606} [2024-06-27 21:03:51,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-27 21:03:51,694 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 606 transitions, 9530 flow [2024-06-27 21:03:51,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:51,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:51,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:51,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:03:51,695 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:51,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1017024711, now seen corresponding path program 4 times [2024-06-27 21:03:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461044156] [2024-06-27 21:03:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:52,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:52,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461044156] [2024-06-27 21:03:52,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461044156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:52,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:52,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:52,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466427935] [2024-06-27 21:03:52,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:52,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:52,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:52,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:52,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:52,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 606 transitions, 9530 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:52,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:52,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:52,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:54,428 INFO L124 PetriNetUnfolderBase]: 4492/7118 cut-off events. [2024-06-27 21:03:54,429 INFO L125 PetriNetUnfolderBase]: For 933136/933136 co-relation queries the response was YES. [2024-06-27 21:03:54,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67180 conditions, 7118 events. 4492/7118 cut-off events. For 933136/933136 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 45300 event pairs, 817 based on Foata normal form. 3/7119 useless extension candidates. Maximal degree in co-relation 66982. Up to 6665 conditions per place. [2024-06-27 21:03:54,550 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 577 selfloop transitions, 46 changer transitions 0/628 dead transitions. [2024-06-27 21:03:54,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 628 transitions, 11018 flow [2024-06-27 21:03:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:03:54,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 21:03:54,551 INFO L175 Difference]: Start difference. First operand has 421 places, 606 transitions, 9530 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:03:54,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 628 transitions, 11018 flow [2024-06-27 21:03:58,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 628 transitions, 10870 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:03:58,397 INFO L231 Difference]: Finished difference. Result has 421 places, 609 transitions, 9582 flow [2024-06-27 21:03:58,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9382, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9582, PETRI_PLACES=421, PETRI_TRANSITIONS=609} [2024-06-27 21:03:58,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-27 21:03:58,398 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 609 transitions, 9582 flow [2024-06-27 21:03:58,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:58,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:58,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:58,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:03:58,398 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1921111880, now seen corresponding path program 1 times [2024-06-27 21:03:58,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:58,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777721242] [2024-06-27 21:03:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:58,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:59,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:59,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777721242] [2024-06-27 21:03:59,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777721242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:59,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:59,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:59,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030829367] [2024-06-27 21:03:59,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:59,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:59,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:59,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:59,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:03:59,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 609 transitions, 9582 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:59,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:59,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:03:59,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:01,548 INFO L124 PetriNetUnfolderBase]: 5035/7949 cut-off events. [2024-06-27 21:04:01,549 INFO L125 PetriNetUnfolderBase]: For 1649414/1649414 co-relation queries the response was YES. [2024-06-27 21:04:01,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81414 conditions, 7949 events. 5035/7949 cut-off events. For 1649414/1649414 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 50536 event pairs, 839 based on Foata normal form. 56/7999 useless extension candidates. Maximal degree in co-relation 81216. Up to 4259 conditions per place. [2024-06-27 21:04:01,686 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 352 selfloop transitions, 292 changer transitions 19/668 dead transitions. [2024-06-27 21:04:01,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 668 transitions, 12066 flow [2024-06-27 21:04:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 21:04:01,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-27 21:04:01,688 INFO L175 Difference]: Start difference. First operand has 421 places, 609 transitions, 9582 flow. Second operand 10 states and 214 transitions. [2024-06-27 21:04:01,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 668 transitions, 12066 flow [2024-06-27 21:04:06,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 668 transitions, 11914 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:06,095 INFO L231 Difference]: Finished difference. Result has 426 places, 603 transitions, 10057 flow [2024-06-27 21:04:06,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9434, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10057, PETRI_PLACES=426, PETRI_TRANSITIONS=603} [2024-06-27 21:04:06,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-27 21:04:06,095 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 603 transitions, 10057 flow [2024-06-27 21:04:06,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:06,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:06,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:06,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:04:06,096 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:06,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1922985830, now seen corresponding path program 2 times [2024-06-27 21:04:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606875847] [2024-06-27 21:04:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:06,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606875847] [2024-06-27 21:04:06,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606875847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:06,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:06,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:06,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877930888] [2024-06-27 21:04:06,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:06,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:06,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:06,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:07,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:04:07,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 603 transitions, 10057 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:07,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:07,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:04:07,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:09,627 INFO L124 PetriNetUnfolderBase]: 5278/8319 cut-off events. [2024-06-27 21:04:09,627 INFO L125 PetriNetUnfolderBase]: For 2062930/2062930 co-relation queries the response was YES. [2024-06-27 21:04:09,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94636 conditions, 8319 events. 5278/8319 cut-off events. For 2062930/2062930 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 52824 event pairs, 961 based on Foata normal form. 56/8369 useless extension candidates. Maximal degree in co-relation 94437. Up to 5731 conditions per place. [2024-06-27 21:04:09,788 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 365 selfloop transitions, 281 changer transitions 6/657 dead transitions. [2024-06-27 21:04:09,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 657 transitions, 12493 flow [2024-06-27 21:04:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-27 21:04:09,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-27 21:04:09,789 INFO L175 Difference]: Start difference. First operand has 426 places, 603 transitions, 10057 flow. Second operand 11 states and 227 transitions. [2024-06-27 21:04:09,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 657 transitions, 12493 flow [2024-06-27 21:04:15,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 657 transitions, 12021 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:15,807 INFO L231 Difference]: Finished difference. Result has 430 places, 605 transitions, 10302 flow [2024-06-27 21:04:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9601, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10302, PETRI_PLACES=430, PETRI_TRANSITIONS=605} [2024-06-27 21:04:15,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-27 21:04:15,808 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 605 transitions, 10302 flow [2024-06-27 21:04:15,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:15,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:15,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:15,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:04:15,809 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:15,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1922989550, now seen corresponding path program 3 times [2024-06-27 21:04:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059885922] [2024-06-27 21:04:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059885922] [2024-06-27 21:04:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059885922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:16,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:16,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:16,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136514325] [2024-06-27 21:04:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:16,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:16,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:16,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:04:16,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 605 transitions, 10302 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:16,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:16,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:04:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:19,117 INFO L124 PetriNetUnfolderBase]: 5054/7985 cut-off events. [2024-06-27 21:04:19,117 INFO L125 PetriNetUnfolderBase]: For 1730072/1730072 co-relation queries the response was YES. [2024-06-27 21:04:19,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85033 conditions, 7985 events. 5054/7985 cut-off events. For 1730072/1730072 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 50794 event pairs, 955 based on Foata normal form. 68/8047 useless extension candidates. Maximal degree in co-relation 84833. Up to 5933 conditions per place. [2024-06-27 21:04:19,267 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 360 selfloop transitions, 268 changer transitions 15/648 dead transitions. [2024-06-27 21:04:19,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 648 transitions, 12250 flow [2024-06-27 21:04:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:04:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:04:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-27 21:04:19,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 21:04:19,268 INFO L175 Difference]: Start difference. First operand has 430 places, 605 transitions, 10302 flow. Second operand 12 states and 232 transitions. [2024-06-27 21:04:19,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 648 transitions, 12250 flow [2024-06-27 21:04:25,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 648 transitions, 11811 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:25,042 INFO L231 Difference]: Finished difference. Result has 435 places, 594 transitions, 10132 flow [2024-06-27 21:04:25,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9863, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10132, PETRI_PLACES=435, PETRI_TRANSITIONS=594} [2024-06-27 21:04:25,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 21:04:25,043 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 594 transitions, 10132 flow [2024-06-27 21:04:25,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:25,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:25,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:25,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:04:25,044 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:25,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash 753627116, now seen corresponding path program 1 times [2024-06-27 21:04:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:25,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405401664] [2024-06-27 21:04:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:25,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:25,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:25,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405401664] [2024-06-27 21:04:25,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405401664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:25,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:25,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:25,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681557750] [2024-06-27 21:04:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:25,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:25,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:25,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:04:25,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 594 transitions, 10132 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:25,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:25,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:04:25,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:28,324 INFO L124 PetriNetUnfolderBase]: 5193/8205 cut-off events. [2024-06-27 21:04:28,324 INFO L125 PetriNetUnfolderBase]: For 1587444/1587444 co-relation queries the response was YES. [2024-06-27 21:04:28,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89826 conditions, 8205 events. 5193/8205 cut-off events. For 1587444/1587444 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52587 event pairs, 1330 based on Foata normal form. 14/8217 useless extension candidates. Maximal degree in co-relation 89624. Up to 7512 conditions per place. [2024-06-27 21:04:28,485 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 588 selfloop transitions, 38 changer transitions 0/631 dead transitions. [2024-06-27 21:04:28,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 631 transitions, 12074 flow [2024-06-27 21:04:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:04:28,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:04:28,486 INFO L175 Difference]: Start difference. First operand has 435 places, 594 transitions, 10132 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:04:28,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 631 transitions, 12074 flow [2024-06-27 21:04:34,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 631 transitions, 11501 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-27 21:04:34,935 INFO L231 Difference]: Finished difference. Result has 431 places, 598 transitions, 9760 flow [2024-06-27 21:04:34,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9559, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9760, PETRI_PLACES=431, PETRI_TRANSITIONS=598} [2024-06-27 21:04:34,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-27 21:04:34,936 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 598 transitions, 9760 flow [2024-06-27 21:04:34,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:34,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:34,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:34,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:04:34,937 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:34,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:34,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1288890436, now seen corresponding path program 2 times [2024-06-27 21:04:34,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:34,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948295411] [2024-06-27 21:04:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:34,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:35,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:35,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948295411] [2024-06-27 21:04:35,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948295411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:35,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:35,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:35,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973745719] [2024-06-27 21:04:35,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:35,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:35,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:35,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:35,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:36,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:04:36,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 598 transitions, 9760 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:36,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:36,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:04:36,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:38,846 INFO L124 PetriNetUnfolderBase]: 5265/8327 cut-off events. [2024-06-27 21:04:38,846 INFO L125 PetriNetUnfolderBase]: For 1651843/1651843 co-relation queries the response was YES. [2024-06-27 21:04:38,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90209 conditions, 8327 events. 5265/8327 cut-off events. For 1651843/1651843 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 53486 event pairs, 1364 based on Foata normal form. 20/8345 useless extension candidates. Maximal degree in co-relation 90006. Up to 7731 conditions per place. [2024-06-27 21:04:38,984 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 563 selfloop transitions, 61 changer transitions 0/629 dead transitions. [2024-06-27 21:04:38,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 629 transitions, 11412 flow [2024-06-27 21:04:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 21:04:38,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-27 21:04:38,986 INFO L175 Difference]: Start difference. First operand has 431 places, 598 transitions, 9760 flow. Second operand 10 states and 186 transitions. [2024-06-27 21:04:38,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 629 transitions, 11412 flow [2024-06-27 21:04:44,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 629 transitions, 11352 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:44,822 INFO L231 Difference]: Finished difference. Result has 436 places, 600 transitions, 9895 flow [2024-06-27 21:04:44,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9700, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9895, PETRI_PLACES=436, PETRI_TRANSITIONS=600} [2024-06-27 21:04:44,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 21:04:44,823 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 600 transitions, 9895 flow [2024-06-27 21:04:44,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:44,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:44,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:44,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:04:44,824 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:44,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash 748049534, now seen corresponding path program 4 times [2024-06-27 21:04:44,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:44,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748491139] [2024-06-27 21:04:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:46,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:46,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748491139] [2024-06-27 21:04:46,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748491139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:46,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:46,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:46,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409161066] [2024-06-27 21:04:46,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:46,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:46,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:46,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:46,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:04:46,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 600 transitions, 9895 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:46,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:46,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:04:46,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:48,658 INFO L124 PetriNetUnfolderBase]: 5357/8459 cut-off events. [2024-06-27 21:04:48,658 INFO L125 PetriNetUnfolderBase]: For 1691749/1691749 co-relation queries the response was YES. [2024-06-27 21:04:48,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92112 conditions, 8459 events. 5357/8459 cut-off events. For 1691749/1691749 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 54331 event pairs, 1366 based on Foata normal form. 20/8477 useless extension candidates. Maximal degree in co-relation 91907. Up to 7926 conditions per place. [2024-06-27 21:04:48,815 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 582 selfloop transitions, 58 changer transitions 0/645 dead transitions. [2024-06-27 21:04:48,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 645 transitions, 11704 flow [2024-06-27 21:04:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-27 21:04:48,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:04:48,817 INFO L175 Difference]: Start difference. First operand has 436 places, 600 transitions, 9895 flow. Second operand 11 states and 198 transitions. [2024-06-27 21:04:48,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 645 transitions, 11704 flow [2024-06-27 21:04:54,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 645 transitions, 11549 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 21:04:54,330 INFO L231 Difference]: Finished difference. Result has 443 places, 618 transitions, 10320 flow [2024-06-27 21:04:54,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9757, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10320, PETRI_PLACES=443, PETRI_TRANSITIONS=618} [2024-06-27 21:04:54,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-27 21:04:54,331 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 618 transitions, 10320 flow [2024-06-27 21:04:54,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:54,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:54,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:54,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:04:54,331 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:54,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1288736614, now seen corresponding path program 5 times [2024-06-27 21:04:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:54,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800547994] [2024-06-27 21:04:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:55,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:55,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800547994] [2024-06-27 21:04:55,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800547994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:55,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:55,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:04:55,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283036052] [2024-06-27 21:04:55,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:55,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:04:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:04:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:04:55,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:04:55,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 618 transitions, 10320 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:55,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:55,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:04:55,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:58,071 INFO L124 PetriNetUnfolderBase]: 5798/9136 cut-off events. [2024-06-27 21:04:58,071 INFO L125 PetriNetUnfolderBase]: For 1927734/1927734 co-relation queries the response was YES. [2024-06-27 21:04:58,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103231 conditions, 9136 events. 5798/9136 cut-off events. For 1927734/1927734 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 58994 event pairs, 1393 based on Foata normal form. 16/9150 useless extension candidates. Maximal degree in co-relation 103021. Up to 7719 conditions per place. [2024-06-27 21:04:58,259 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 548 selfloop transitions, 165 changer transitions 0/718 dead transitions. [2024-06-27 21:04:58,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 718 transitions, 13748 flow [2024-06-27 21:04:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 21:04:58,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-27 21:04:58,261 INFO L175 Difference]: Start difference. First operand has 443 places, 618 transitions, 10320 flow. Second operand 10 states and 204 transitions. [2024-06-27 21:04:58,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 718 transitions, 13748 flow [2024-06-27 21:05:07,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 718 transitions, 13548 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:07,958 INFO L231 Difference]: Finished difference. Result has 453 places, 674 transitions, 12051 flow [2024-06-27 21:05:07,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10120, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12051, PETRI_PLACES=453, PETRI_TRANSITIONS=674} [2024-06-27 21:05:07,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-27 21:05:07,958 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 674 transitions, 12051 flow [2024-06-27 21:05:07,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:07,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:07,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:07,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:05:07,959 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:07,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash 747905384, now seen corresponding path program 6 times [2024-06-27 21:05:07,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:07,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756240450] [2024-06-27 21:05:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:07,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:08,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:08,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756240450] [2024-06-27 21:05:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756240450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:08,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:08,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072749296] [2024-06-27 21:05:08,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:08,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:08,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:08,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:05:08,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 674 transitions, 12051 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:08,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:08,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:05:08,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:12,558 INFO L124 PetriNetUnfolderBase]: 5890/9288 cut-off events. [2024-06-27 21:05:12,559 INFO L125 PetriNetUnfolderBase]: For 1991681/1991681 co-relation queries the response was YES. [2024-06-27 21:05:12,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106661 conditions, 9288 events. 5890/9288 cut-off events. For 1991681/1991681 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 60266 event pairs, 1451 based on Foata normal form. 20/9306 useless extension candidates. Maximal degree in co-relation 106445. Up to 8411 conditions per place. [2024-06-27 21:05:12,841 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 560 selfloop transitions, 152 changer transitions 0/717 dead transitions. [2024-06-27 21:05:12,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 717 transitions, 14074 flow [2024-06-27 21:05:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 21:05:12,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48048780487804876 [2024-06-27 21:05:12,843 INFO L175 Difference]: Start difference. First operand has 453 places, 674 transitions, 12051 flow. Second operand 10 states and 197 transitions. [2024-06-27 21:05:12,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 717 transitions, 14074 flow [2024-06-27 21:05:22,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 717 transitions, 13846 flow, removed 97 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:22,592 INFO L231 Difference]: Finished difference. Result has 461 places, 681 transitions, 12367 flow [2024-06-27 21:05:22,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11829, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12367, PETRI_PLACES=461, PETRI_TRANSITIONS=681} [2024-06-27 21:05:22,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-27 21:05:22,593 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 681 transitions, 12367 flow [2024-06-27 21:05:22,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:22,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:22,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:22,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:05:22,594 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:22,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:22,594 INFO L85 PathProgramCache]: Analyzing trace with hash 526637236, now seen corresponding path program 3 times [2024-06-27 21:05:22,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:22,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431558165] [2024-06-27 21:05:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:22,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:23,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:23,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431558165] [2024-06-27 21:05:23,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431558165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:23,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:23,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633969632] [2024-06-27 21:05:23,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:23,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:23,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:23,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:05:23,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 681 transitions, 12367 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:23,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:23,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:05:23,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:27,209 INFO L124 PetriNetUnfolderBase]: 6035/9517 cut-off events. [2024-06-27 21:05:27,210 INFO L125 PetriNetUnfolderBase]: For 2068596/2068596 co-relation queries the response was YES. [2024-06-27 21:05:27,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108884 conditions, 9517 events. 6035/9517 cut-off events. For 2068596/2068596 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 62024 event pairs, 1327 based on Foata normal form. 26/9541 useless extension candidates. Maximal degree in co-relation 108665. Up to 8423 conditions per place. [2024-06-27 21:05:27,402 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 566 selfloop transitions, 176 changer transitions 0/747 dead transitions. [2024-06-27 21:05:27,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 747 transitions, 15288 flow [2024-06-27 21:05:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 21:05:27,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013550135501355 [2024-06-27 21:05:27,404 INFO L175 Difference]: Start difference. First operand has 461 places, 681 transitions, 12367 flow. Second operand 9 states and 185 transitions. [2024-06-27 21:05:27,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 747 transitions, 15288 flow [2024-06-27 21:05:36,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 747 transitions, 14970 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:36,424 INFO L231 Difference]: Finished difference. Result has 467 places, 708 transitions, 13276 flow [2024-06-27 21:05:36,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12053, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13276, PETRI_PLACES=467, PETRI_TRANSITIONS=708} [2024-06-27 21:05:36,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-27 21:05:36,425 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 708 transitions, 13276 flow [2024-06-27 21:05:36,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:36,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:36,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:36,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:05:36,426 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:36,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash -100615370, now seen corresponding path program 4 times [2024-06-27 21:05:36,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:36,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256610407] [2024-06-27 21:05:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:36,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256610407] [2024-06-27 21:05:37,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256610407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:37,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:37,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:37,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89710634] [2024-06-27 21:05:37,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:37,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:37,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:37,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:37,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:05:37,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 708 transitions, 13276 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:37,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:37,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:05:37,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:41,283 INFO L124 PetriNetUnfolderBase]: 6284/9908 cut-off events. [2024-06-27 21:05:41,283 INFO L125 PetriNetUnfolderBase]: For 2271328/2271328 co-relation queries the response was YES. [2024-06-27 21:05:41,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117969 conditions, 9908 events. 6284/9908 cut-off events. For 2271328/2271328 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 65041 event pairs, 1381 based on Foata normal form. 16/9922 useless extension candidates. Maximal degree in co-relation 117746. Up to 8612 conditions per place. [2024-06-27 21:05:41,458 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 631 selfloop transitions, 124 changer transitions 0/760 dead transitions. [2024-06-27 21:05:41,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 760 transitions, 15683 flow [2024-06-27 21:05:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 21:05:41,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-27 21:05:41,459 INFO L175 Difference]: Start difference. First operand has 467 places, 708 transitions, 13276 flow. Second operand 8 states and 174 transitions. [2024-06-27 21:05:41,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 760 transitions, 15683 flow [2024-06-27 21:05:50,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 760 transitions, 15487 flow, removed 89 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:50,701 INFO L231 Difference]: Finished difference. Result has 474 places, 716 transitions, 13618 flow [2024-06-27 21:05:50,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13082, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13618, PETRI_PLACES=474, PETRI_TRANSITIONS=716} [2024-06-27 21:05:50,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-27 21:05:50,702 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 716 transitions, 13618 flow [2024-06-27 21:05:50,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:50,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:50,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:50,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:05:50,703 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:50,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash 155885140, now seen corresponding path program 5 times [2024-06-27 21:05:50,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:50,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639188128] [2024-06-27 21:05:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:50,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:51,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:51,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639188128] [2024-06-27 21:05:51,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639188128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:51,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247709931] [2024-06-27 21:05:51,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:51,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:51,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:05:51,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 716 transitions, 13618 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:51,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:51,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:05:51,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:55,688 INFO L124 PetriNetUnfolderBase]: 6472/10202 cut-off events. [2024-06-27 21:05:55,688 INFO L125 PetriNetUnfolderBase]: For 2412899/2412899 co-relation queries the response was YES. [2024-06-27 21:05:55,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124113 conditions, 10202 events. 6472/10202 cut-off events. For 2412899/2412899 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 67447 event pairs, 1675 based on Foata normal form. 12/10212 useless extension candidates. Maximal degree in co-relation 123887. Up to 9089 conditions per place. [2024-06-27 21:05:55,911 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 685 selfloop transitions, 69 changer transitions 0/759 dead transitions. [2024-06-27 21:05:55,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 759 transitions, 16129 flow [2024-06-27 21:05:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:05:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:05:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 21:05:55,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-27 21:05:55,913 INFO L175 Difference]: Start difference. First operand has 474 places, 716 transitions, 13618 flow. Second operand 11 states and 190 transitions. [2024-06-27 21:05:55,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 759 transitions, 16129 flow [2024-06-27 21:06:04,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 759 transitions, 16036 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:04,786 INFO L231 Difference]: Finished difference. Result has 484 places, 726 transitions, 14065 flow [2024-06-27 21:06:04,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13548, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14065, PETRI_PLACES=484, PETRI_TRANSITIONS=726} [2024-06-27 21:06:04,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-27 21:06:04,786 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 726 transitions, 14065 flow [2024-06-27 21:06:04,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:04,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:04,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:04,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:06:04,787 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:04,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:04,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1959577562, now seen corresponding path program 6 times [2024-06-27 21:06:04,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:04,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867499607] [2024-06-27 21:06:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:04,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:05,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:05,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867499607] [2024-06-27 21:06:05,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867499607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:05,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:05,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:05,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834686429] [2024-06-27 21:06:05,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:05,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:05,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:05,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:05,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:05,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:06:05,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 726 transitions, 14065 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:05,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:05,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:06:05,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:09,942 INFO L124 PetriNetUnfolderBase]: 6547/10335 cut-off events. [2024-06-27 21:06:09,943 INFO L125 PetriNetUnfolderBase]: For 2477413/2477413 co-relation queries the response was YES. [2024-06-27 21:06:10,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125508 conditions, 10335 events. 6547/10335 cut-off events. For 2477413/2477413 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 68409 event pairs, 1550 based on Foata normal form. 24/10357 useless extension candidates. Maximal degree in co-relation 125279. Up to 9376 conditions per place. [2024-06-27 21:06:10,174 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 600 selfloop transitions, 160 changer transitions 0/765 dead transitions. [2024-06-27 21:06:10,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 765 transitions, 16026 flow [2024-06-27 21:06:10,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 21:06:10,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-27 21:06:10,176 INFO L175 Difference]: Start difference. First operand has 484 places, 726 transitions, 14065 flow. Second operand 8 states and 172 transitions. [2024-06-27 21:06:10,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 765 transitions, 16026 flow [2024-06-27 21:06:20,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 765 transitions, 15844 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:20,566 INFO L231 Difference]: Finished difference. Result has 487 places, 732 transitions, 14422 flow [2024-06-27 21:06:20,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13889, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14422, PETRI_PLACES=487, PETRI_TRANSITIONS=732} [2024-06-27 21:06:20,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-27 21:06:20,567 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 732 transitions, 14422 flow [2024-06-27 21:06:20,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:20,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:20,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:20,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:06:20,568 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:20,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash 673535550, now seen corresponding path program 7 times [2024-06-27 21:06:20,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:20,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653783426] [2024-06-27 21:06:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:21,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:21,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653783426] [2024-06-27 21:06:21,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653783426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:21,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:21,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:21,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000919582] [2024-06-27 21:06:21,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:21,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:21,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:21,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:21,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:06:21,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 732 transitions, 14422 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:21,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:21,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:06:21,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:25,977 INFO L124 PetriNetUnfolderBase]: 6665/10479 cut-off events. [2024-06-27 21:06:25,977 INFO L125 PetriNetUnfolderBase]: For 2578807/2578807 co-relation queries the response was YES. [2024-06-27 21:06:26,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128029 conditions, 10479 events. 6665/10479 cut-off events. For 2578807/2578807 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 69169 event pairs, 1532 based on Foata normal form. 30/10507 useless extension candidates. Maximal degree in co-relation 127801. Up to 9696 conditions per place. [2024-06-27 21:06:26,212 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 672 selfloop transitions, 111 changer transitions 0/788 dead transitions. [2024-06-27 21:06:26,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 788 transitions, 16718 flow [2024-06-27 21:06:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 21:06:26,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-27 21:06:26,214 INFO L175 Difference]: Start difference. First operand has 487 places, 732 transitions, 14422 flow. Second operand 10 states and 193 transitions. [2024-06-27 21:06:26,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 788 transitions, 16718 flow [2024-06-27 21:06:36,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 788 transitions, 16385 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:36,193 INFO L231 Difference]: Finished difference. Result has 495 places, 756 transitions, 15032 flow [2024-06-27 21:06:36,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14089, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15032, PETRI_PLACES=495, PETRI_TRANSITIONS=756} [2024-06-27 21:06:36,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-27 21:06:36,194 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 756 transitions, 15032 flow [2024-06-27 21:06:36,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:36,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:36,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:36,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:06:36,195 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:36,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash 165081910, now seen corresponding path program 7 times [2024-06-27 21:06:36,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:36,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445993910] [2024-06-27 21:06:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:36,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:36,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:36,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445993910] [2024-06-27 21:06:36,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445993910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:36,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:36,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:36,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165641641] [2024-06-27 21:06:36,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:36,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:36,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:36,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:36,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:37,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:06:37,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 756 transitions, 15032 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:37,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:37,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:06:37,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:41,321 INFO L124 PetriNetUnfolderBase]: 6903/10899 cut-off events. [2024-06-27 21:06:41,322 INFO L125 PetriNetUnfolderBase]: For 2688349/2688349 co-relation queries the response was YES. [2024-06-27 21:06:41,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135402 conditions, 10899 events. 6903/10899 cut-off events. For 2688349/2688349 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 72698 event pairs, 1493 based on Foata normal form. 16/10913 useless extension candidates. Maximal degree in co-relation 135169. Up to 9993 conditions per place. [2024-06-27 21:06:41,537 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 743 selfloop transitions, 59 changer transitions 0/807 dead transitions. [2024-06-27 21:06:41,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 807 transitions, 17579 flow [2024-06-27 21:06:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 21:06:41,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-27 21:06:41,539 INFO L175 Difference]: Start difference. First operand has 495 places, 756 transitions, 15032 flow. Second operand 8 states and 177 transitions. [2024-06-27 21:06:41,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 807 transitions, 17579 flow [2024-06-27 21:06:53,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 807 transitions, 17347 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:54,002 INFO L231 Difference]: Finished difference. Result has 502 places, 766 transitions, 15248 flow [2024-06-27 21:06:54,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14800, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15248, PETRI_PLACES=502, PETRI_TRANSITIONS=766} [2024-06-27 21:06:54,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-27 21:06:54,003 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 766 transitions, 15248 flow [2024-06-27 21:06:54,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:54,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:54,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:54,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:06:54,004 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:54,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:54,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1424376132, now seen corresponding path program 8 times [2024-06-27 21:06:54,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:54,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018521876] [2024-06-27 21:06:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:54,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:54,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018521876] [2024-06-27 21:06:54,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018521876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:54,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:54,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:54,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539633222] [2024-06-27 21:06:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:54,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:54,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:54,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:55,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:06:55,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 766 transitions, 15248 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:55,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:55,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:06:55,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:59,384 INFO L124 PetriNetUnfolderBase]: 6982/11022 cut-off events. [2024-06-27 21:06:59,384 INFO L125 PetriNetUnfolderBase]: For 2770668/2770668 co-relation queries the response was YES. [2024-06-27 21:06:59,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137184 conditions, 11022 events. 6982/11022 cut-off events. For 2770668/2770668 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 73894 event pairs, 1812 based on Foata normal form. 26/11046 useless extension candidates. Maximal degree in co-relation 136947. Up to 10373 conditions per place. [2024-06-27 21:06:59,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 737 selfloop transitions, 53 changer transitions 0/795 dead transitions. [2024-06-27 21:06:59,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 795 transitions, 17199 flow [2024-06-27 21:06:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:06:59,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 21:06:59,609 INFO L175 Difference]: Start difference. First operand has 502 places, 766 transitions, 15248 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:06:59,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 795 transitions, 17199 flow [2024-06-27 21:07:15,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 795 transitions, 16994 flow, removed 80 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:15,812 INFO L231 Difference]: Finished difference. Result has 508 places, 770 transitions, 15296 flow [2024-06-27 21:07:15,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15043, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15296, PETRI_PLACES=508, PETRI_TRANSITIONS=770} [2024-06-27 21:07:15,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-27 21:07:15,813 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 770 transitions, 15296 flow [2024-06-27 21:07:15,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:15,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:15,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:15,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:07:15,814 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:15,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1424383572, now seen corresponding path program 9 times [2024-06-27 21:07:15,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:15,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201071193] [2024-06-27 21:07:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:16,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:16,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201071193] [2024-06-27 21:07:16,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201071193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:16,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:16,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:07:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443163326] [2024-06-27 21:07:16,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:16,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:07:16,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:07:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:07:16,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:07:16,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 770 transitions, 15296 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:16,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:16,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:07:16,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:21,174 INFO L124 PetriNetUnfolderBase]: 7181/11319 cut-off events. [2024-06-27 21:07:21,174 INFO L125 PetriNetUnfolderBase]: For 2899757/2899757 co-relation queries the response was YES. [2024-06-27 21:07:21,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143053 conditions, 11319 events. 7181/11319 cut-off events. For 2899757/2899757 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 76167 event pairs, 1791 based on Foata normal form. 14/11331 useless extension candidates. Maximal degree in co-relation 142814. Up to 10114 conditions per place. [2024-06-27 21:07:21,404 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 745 selfloop transitions, 56 changer transitions 0/806 dead transitions. [2024-06-27 21:07:21,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 806 transitions, 17718 flow [2024-06-27 21:07:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:07:21,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:07:21,406 INFO L175 Difference]: Start difference. First operand has 508 places, 770 transitions, 15296 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:07:21,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 806 transitions, 17718 flow