./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 396724ab2a2ec5289b7ea4588fd55a67c0c481ae09e6334528dd5eeb3d243fac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:06:06,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:06:06,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:06:06,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:06:06,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:06:06,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:06:06,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:06:06,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:06:06,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:06:06,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:06:06,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:06:06,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:06:06,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:06:06,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:06:06,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:06:06,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:06:06,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:06:06,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:06:06,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:06:06,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:06:06,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:06:06,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:06:06,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:06:06,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:06:06,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:06:06,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:06:06,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:06:06,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:06:06,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:06:06,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:06:06,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:06:06,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:06:06,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:06:06,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:06:06,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:06:06,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:06:06,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:06:06,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:06:06,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:06:06,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:06:06,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:06:06,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:06:06,444 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:06:06,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:06:06,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:06:06,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:06:06,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:06:06,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:06:06,447 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:06:06,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:06:06,448 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:06:06,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:06:06,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:06:06,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:06:06,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:06:06,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:06:06,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:06:06,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:06:06,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:06:06,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:06:06,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:06:06,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:06:06,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:06:06,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:06:06,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:06:06,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:06:06,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:06:06,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:06:06,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:06:06,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:06:06,453 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:06:06,454 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:06:06,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:06:06,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:06:06,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 396724ab2a2ec5289b7ea4588fd55a67c0c481ae09e6334528dd5eeb3d243fac [2021-11-02 23:06:06,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:06:06,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:06:06,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:06:06,862 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:06:06,863 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:06:06,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-02 23:06:06,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/data/7f9080c6a/1e7f95de91524a1284a0a870ef5223ad/FLAGf16223136 [2021-11-02 23:06:07,950 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:06:07,950 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-02 23:06:07,985 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/data/7f9080c6a/1e7f95de91524a1284a0a870ef5223ad/FLAGf16223136 [2021-11-02 23:06:08,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/data/7f9080c6a/1e7f95de91524a1284a0a870ef5223ad [2021-11-02 23:06:08,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:06:08,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:06:08,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:06:08,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:06:08,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:06:08,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:06:08" (1/1) ... [2021-11-02 23:06:08,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf553b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:08, skipping insertion in model container [2021-11-02 23:06:08,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:06:08" (1/1) ... [2021-11-02 23:06:08,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:06:08,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:06:09,025 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[15688,15701] [2021-11-02 23:06:09,138 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[22381,22394] [2021-11-02 23:06:10,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:06:10,318 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:06:10,393 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[15688,15701] [2021-11-02 23:06:10,417 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[22381,22394] [2021-11-02 23:06:11,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:06:11,212 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:06:11,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11 WrapperNode [2021-11-02 23:06:11,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:06:11,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:06:11,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:06:11,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:06:11,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:11,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:11,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:06:11,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:06:11,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:06:11,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:06:11,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:11,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:12,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:12,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:12,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:12,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:12,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:12,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:06:12,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:06:12,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:06:12,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:06:12,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (1/1) ... [2021-11-02 23:06:12,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:06:12,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:12,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:06:12,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1690038-e365-4027-ba08-96a164e85c71/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:06:12,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:06:12,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:06:12,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:06:12,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:06:18,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:06:18,851 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2021-11-02 23:06:18,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:06:18 BoogieIcfgContainer [2021-11-02 23:06:18,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:06:18,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:06:18,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:06:18,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:06:18,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:06:08" (1/3) ... [2021-11-02 23:06:18,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b033893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:06:18, skipping insertion in model container [2021-11-02 23:06:18,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:06:11" (2/3) ... [2021-11-02 23:06:18,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b033893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:06:18, skipping insertion in model container [2021-11-02 23:06:18,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:06:18" (3/3) ... [2021-11-02 23:06:18,869 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-02 23:06:18,880 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:06:18,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 23:06:18,972 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:06:18,985 INFO L339 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:06:18,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 23:06:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 925 states, 922 states have (on average 1.9002169197396963) internal successors, (1752), 924 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:06:19,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:19,061 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:19,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2021-11-02 23:06:19,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:19,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516561717] [2021-11-02 23:06:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:19,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:19,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:19,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516561717] [2021-11-02 23:06:19,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516561717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:19,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:19,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:06:19,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564736874] [2021-11-02 23:06:19,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:06:19,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:06:19,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:06:19,493 INFO L87 Difference]: Start difference. First operand has 925 states, 922 states have (on average 1.9002169197396963) internal successors, (1752), 924 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:19,655 INFO L93 Difference]: Finished difference Result 1802 states and 3414 transitions. [2021-11-02 23:06:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:06:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 23:06:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:19,696 INFO L225 Difference]: With dead ends: 1802 [2021-11-02 23:06:19,696 INFO L226 Difference]: Without dead ends: 859 [2021-11-02 23:06:19,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:06:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-02 23:06:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-11-02 23:06:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 857 states have (on average 1.8891481913652275) internal successors, (1619), 858 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1619 transitions. [2021-11-02 23:06:19,843 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1619 transitions. Word has length 38 [2021-11-02 23:06:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:19,844 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1619 transitions. [2021-11-02 23:06:19,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1619 transitions. [2021-11-02 23:06:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:06:19,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:19,847 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:19,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:06:19,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:19,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-11-02 23:06:19,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:19,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507994891] [2021-11-02 23:06:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:19,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:20,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:20,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507994891] [2021-11-02 23:06:20,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507994891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:20,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:20,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:06:20,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995041981] [2021-11-02 23:06:20,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:06:20,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:20,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:06:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:06:20,027 INFO L87 Difference]: Start difference. First operand 859 states and 1619 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:20,204 INFO L93 Difference]: Finished difference Result 922 states and 1717 transitions. [2021-11-02 23:06:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:06:20,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 23:06:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:20,216 INFO L225 Difference]: With dead ends: 922 [2021-11-02 23:06:20,217 INFO L226 Difference]: Without dead ends: 859 [2021-11-02 23:06:20,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:06:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-02 23:06:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-11-02 23:06:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 857 states have (on average 1.8424737456242708) internal successors, (1579), 858 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1579 transitions. [2021-11-02 23:06:20,266 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1579 transitions. Word has length 38 [2021-11-02 23:06:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:20,267 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1579 transitions. [2021-11-02 23:06:20,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1579 transitions. [2021-11-02 23:06:20,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:06:20,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:20,278 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:20,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:06:20,278 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1129338843, now seen corresponding path program 1 times [2021-11-02 23:06:20,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:20,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285184209] [2021-11-02 23:06:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:20,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:20,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:20,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285184209] [2021-11-02 23:06:20,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285184209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:20,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:20,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:20,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985597368] [2021-11-02 23:06:20,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:06:20,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:06:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:06:20,535 INFO L87 Difference]: Start difference. First operand 859 states and 1579 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:29,480 INFO L93 Difference]: Finished difference Result 3114 states and 5888 transitions. [2021-11-02 23:06:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:06:29,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:06:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:29,499 INFO L225 Difference]: With dead ends: 3114 [2021-11-02 23:06:29,499 INFO L226 Difference]: Without dead ends: 2361 [2021-11-02 23:06:29,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:06:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-11-02 23:06:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2021-11-02 23:06:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2359 states have (on average 1.5705807545570156) internal successors, (3705), 2360 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3705 transitions. [2021-11-02 23:06:29,585 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3705 transitions. Word has length 60 [2021-11-02 23:06:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:29,585 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 3705 transitions. [2021-11-02 23:06:29,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3705 transitions. [2021-11-02 23:06:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:06:29,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:29,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:29,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:06:29,589 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-11-02 23:06:29,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:29,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022682825] [2021-11-02 23:06:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:29,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:29,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:29,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022682825] [2021-11-02 23:06:29,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022682825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:29,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:29,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:29,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752798948] [2021-11-02 23:06:29,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:29,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:29,701 INFO L87 Difference]: Start difference. First operand 2361 states and 3705 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:29,753 INFO L93 Difference]: Finished difference Result 2473 states and 3883 transitions. [2021-11-02 23:06:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:29,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 23:06:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:29,771 INFO L225 Difference]: With dead ends: 2473 [2021-11-02 23:06:29,771 INFO L226 Difference]: Without dead ends: 2414 [2021-11-02 23:06:29,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-11-02 23:06:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2412. [2021-11-02 23:06:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2410 states have (on average 1.571369294605809) internal successors, (3787), 2411 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3787 transitions. [2021-11-02 23:06:29,853 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3787 transitions. Word has length 77 [2021-11-02 23:06:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:29,854 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 3787 transitions. [2021-11-02 23:06:29,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3787 transitions. [2021-11-02 23:06:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:06:29,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:29,857 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:29,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:06:29,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:29,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-11-02 23:06:29,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:29,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655182659] [2021-11-02 23:06:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:29,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:29,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:29,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655182659] [2021-11-02 23:06:29,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655182659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:29,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:29,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:29,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635436046] [2021-11-02 23:06:29,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:29,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:29,995 INFO L87 Difference]: Start difference. First operand 2412 states and 3787 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:30,067 INFO L93 Difference]: Finished difference Result 2620 states and 4119 transitions. [2021-11-02 23:06:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:30,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 23:06:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:30,087 INFO L225 Difference]: With dead ends: 2620 [2021-11-02 23:06:30,087 INFO L226 Difference]: Without dead ends: 2510 [2021-11-02 23:06:30,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-11-02 23:06:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2508. [2021-11-02 23:06:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2506 states have (on average 1.5722266560255387) internal successors, (3940), 2507 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3940 transitions. [2021-11-02 23:06:30,238 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3940 transitions. Word has length 77 [2021-11-02 23:06:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:30,240 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 3940 transitions. [2021-11-02 23:06:30,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3940 transitions. [2021-11-02 23:06:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:06:30,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:30,242 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:30,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:06:30,243 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-11-02 23:06:30,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:30,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532750139] [2021-11-02 23:06:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:30,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:30,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:30,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532750139] [2021-11-02 23:06:30,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532750139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:30,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:30,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:06:30,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078210260] [2021-11-02 23:06:30,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:06:30,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:30,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:06:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:06:30,467 INFO L87 Difference]: Start difference. First operand 2508 states and 3940 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:30,915 INFO L93 Difference]: Finished difference Result 4980 states and 7888 transitions. [2021-11-02 23:06:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:06:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 23:06:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:30,963 INFO L225 Difference]: With dead ends: 4980 [2021-11-02 23:06:30,963 INFO L226 Difference]: Without dead ends: 4774 [2021-11-02 23:06:30,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:06:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2021-11-02 23:06:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 2712. [2021-11-02 23:06:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2710 states have (on average 1.5719557195571956) internal successors, (4260), 2711 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4260 transitions. [2021-11-02 23:06:31,114 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4260 transitions. Word has length 77 [2021-11-02 23:06:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:31,115 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 4260 transitions. [2021-11-02 23:06:31,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4260 transitions. [2021-11-02 23:06:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:06:31,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:31,117 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:31,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:06:31,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:31,119 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-11-02 23:06:31,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:31,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588697156] [2021-11-02 23:06:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:31,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:31,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:31,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588697156] [2021-11-02 23:06:31,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588697156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:31,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:31,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:31,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130460580] [2021-11-02 23:06:31,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:31,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:31,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:31,267 INFO L87 Difference]: Start difference. First operand 2712 states and 4260 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:31,359 INFO L93 Difference]: Finished difference Result 3320 states and 5220 transitions. [2021-11-02 23:06:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) Word has length 79 [2021-11-02 23:06:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:31,379 INFO L225 Difference]: With dead ends: 3320 [2021-11-02 23:06:31,379 INFO L226 Difference]: Without dead ends: 2910 [2021-11-02 23:06:31,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-11-02 23:06:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2908. [2021-11-02 23:06:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2906 states have (on average 1.5705437026841018) internal successors, (4564), 2907 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4564 transitions. [2021-11-02 23:06:31,513 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4564 transitions. Word has length 79 [2021-11-02 23:06:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:31,514 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 4564 transitions. [2021-11-02 23:06:31,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:31,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4564 transitions. [2021-11-02 23:06:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:06:31,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:31,519 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:31,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:06:31,519 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2021-11-02 23:06:31,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:31,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366941882] [2021-11-02 23:06:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:31,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:31,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:31,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366941882] [2021-11-02 23:06:31,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366941882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:31,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:31,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:06:31,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025534992] [2021-11-02 23:06:31,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:06:31,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:31,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:06:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:06:31,911 INFO L87 Difference]: Start difference. First operand 2908 states and 4564 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2021-11-02 23:06:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:32,304 INFO L93 Difference]: Finished difference Result 3514 states and 5516 transitions. [2021-11-02 23:06:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:06:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) Word has length 79 [2021-11-02 23:06:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:32,325 INFO L225 Difference]: With dead ends: 3514 [2021-11-02 23:06:32,325 INFO L226 Difference]: Without dead ends: 2910 [2021-11-02 23:06:32,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:06:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-11-02 23:06:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2908. [2021-11-02 23:06:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2906 states have (on average 1.5684790089470062) internal successors, (4558), 2907 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4558 transitions. [2021-11-02 23:06:32,452 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4558 transitions. Word has length 79 [2021-11-02 23:06:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:32,453 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 4558 transitions. [2021-11-02 23:06:32,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2021-11-02 23:06:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4558 transitions. [2021-11-02 23:06:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:06:32,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:32,455 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:32,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:06:32,456 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-11-02 23:06:32,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:32,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084587822] [2021-11-02 23:06:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:32,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:32,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:32,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084587822] [2021-11-02 23:06:32,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084587822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:32,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:32,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:32,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122609233] [2021-11-02 23:06:32,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:32,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:32,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:32,529 INFO L87 Difference]: Start difference. First operand 2908 states and 4558 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:32,666 INFO L93 Difference]: Finished difference Result 4044 states and 6328 transitions. [2021-11-02 23:06:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:32,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) Word has length 79 [2021-11-02 23:06:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:32,689 INFO L225 Difference]: With dead ends: 4044 [2021-11-02 23:06:32,689 INFO L226 Difference]: Without dead ends: 3440 [2021-11-02 23:06:32,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-02 23:06:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3438. [2021-11-02 23:06:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3436 states have (on average 1.5628637951105937) internal successors, (5370), 3437 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 5370 transitions. [2021-11-02 23:06:32,967 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 5370 transitions. Word has length 79 [2021-11-02 23:06:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:32,967 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 5370 transitions. [2021-11-02 23:06:32,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 5370 transitions. [2021-11-02 23:06:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:06:32,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:32,970 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:32,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:06:32,970 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:32,971 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-11-02 23:06:32,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:32,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342934422] [2021-11-02 23:06:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:32,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:33,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:33,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342934422] [2021-11-02 23:06:33,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342934422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:33,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:33,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:33,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679359] [2021-11-02 23:06:33,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:33,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:33,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:33,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:33,041 INFO L87 Difference]: Start difference. First operand 3438 states and 5370 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:33,321 INFO L93 Difference]: Finished difference Result 5562 states and 8644 transitions. [2021-11-02 23:06:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) Word has length 79 [2021-11-02 23:06:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:33,359 INFO L225 Difference]: With dead ends: 5562 [2021-11-02 23:06:33,359 INFO L226 Difference]: Without dead ends: 4428 [2021-11-02 23:06:33,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2021-11-02 23:06:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4426. [2021-11-02 23:06:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4424 states have (on average 1.5510849909584086) internal successors, (6862), 4425 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 6862 transitions. [2021-11-02 23:06:33,732 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 6862 transitions. Word has length 79 [2021-11-02 23:06:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:33,733 INFO L470 AbstractCegarLoop]: Abstraction has 4426 states and 6862 transitions. [2021-11-02 23:06:33,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:33,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 6862 transitions. [2021-11-02 23:06:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:06:33,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:33,736 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:33,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:06:33,737 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-11-02 23:06:33,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:33,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407425480] [2021-11-02 23:06:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:33,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:33,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:33,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407425480] [2021-11-02 23:06:33,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407425480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:33,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:33,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:33,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319224526] [2021-11-02 23:06:33,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:33,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:33,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:33,820 INFO L87 Difference]: Start difference. First operand 4426 states and 6862 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:34,226 INFO L93 Difference]: Finished difference Result 8382 states and 12880 transitions. [2021-11-02 23:06:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:34,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) Word has length 79 [2021-11-02 23:06:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:34,250 INFO L225 Difference]: With dead ends: 8382 [2021-11-02 23:06:34,251 INFO L226 Difference]: Without dead ends: 6260 [2021-11-02 23:06:34,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2021-11-02 23:06:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 6258. [2021-11-02 23:06:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6258 states, 6256 states have (on average 1.5316496163682864) internal successors, (9582), 6257 states have internal predecessors, (9582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6258 states to 6258 states and 9582 transitions. [2021-11-02 23:06:34,730 INFO L78 Accepts]: Start accepts. Automaton has 6258 states and 9582 transitions. Word has length 79 [2021-11-02 23:06:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:34,731 INFO L470 AbstractCegarLoop]: Abstraction has 6258 states and 9582 transitions. [2021-11-02 23:06:34,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 6258 states and 9582 transitions. [2021-11-02 23:06:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:06:34,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:34,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:34,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:06:34,733 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-11-02 23:06:34,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:34,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223445065] [2021-11-02 23:06:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:34,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:34,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:34,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223445065] [2021-11-02 23:06:34,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223445065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:34,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:34,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:34,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854683630] [2021-11-02 23:06:34,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:34,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:34,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:34,801 INFO L87 Difference]: Start difference. First operand 6258 states and 9582 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:35,468 INFO L93 Difference]: Finished difference Result 13590 states and 20560 transitions. [2021-11-02 23:06:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) Word has length 79 [2021-11-02 23:06:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:35,494 INFO L225 Difference]: With dead ends: 13590 [2021-11-02 23:06:35,495 INFO L226 Difference]: Without dead ends: 9636 [2021-11-02 23:06:35,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-11-02 23:06:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 9634. [2021-11-02 23:06:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9634 states, 9632 states have (on average 1.5047757475083057) internal successors, (14494), 9633 states have internal predecessors, (14494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 14494 transitions. [2021-11-02 23:06:36,223 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 14494 transitions. Word has length 79 [2021-11-02 23:06:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:36,224 INFO L470 AbstractCegarLoop]: Abstraction has 9634 states and 14494 transitions. [2021-11-02 23:06:36,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-02 23:06:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 14494 transitions. [2021-11-02 23:06:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:06:36,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:36,226 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:36,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:06:36,226 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:36,227 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-11-02 23:06:36,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:36,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551473942] [2021-11-02 23:06:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:36,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:36,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:36,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551473942] [2021-11-02 23:06:36,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551473942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:36,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:36,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:06:36,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021700458] [2021-11-02 23:06:36,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:06:36,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:36,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:06:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:06:36,360 INFO L87 Difference]: Start difference. First operand 9634 states and 14494 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:37,918 INFO L93 Difference]: Finished difference Result 15969 states and 23637 transitions. [2021-11-02 23:06:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:06:37,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 23:06:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:37,963 INFO L225 Difference]: With dead ends: 15969 [2021-11-02 23:06:37,963 INFO L226 Difference]: Without dead ends: 15967 [2021-11-02 23:06:37,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:06:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15967 states. [2021-11-02 23:06:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15967 to 10018. [2021-11-02 23:06:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10018 states, 10016 states have (on average 1.4822284345047922) internal successors, (14846), 10017 states have internal predecessors, (14846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 14846 transitions. [2021-11-02 23:06:39,093 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 14846 transitions. Word has length 80 [2021-11-02 23:06:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:39,093 INFO L470 AbstractCegarLoop]: Abstraction has 10018 states and 14846 transitions. [2021-11-02 23:06:39,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 14846 transitions. [2021-11-02 23:06:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 23:06:39,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:39,103 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:39,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:06:39,104 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1535674975, now seen corresponding path program 1 times [2021-11-02 23:06:39,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:39,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837954627] [2021-11-02 23:06:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:39,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-02 23:06:39,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:39,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837954627] [2021-11-02 23:06:39,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837954627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:39,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:39,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:06:39,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251451835] [2021-11-02 23:06:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:06:39,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:06:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:06:39,267 INFO L87 Difference]: Start difference. First operand 10018 states and 14846 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:44,151 INFO L93 Difference]: Finished difference Result 57840 states and 84373 transitions. [2021-11-02 23:06:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:06:44,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-02 23:06:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:44,295 INFO L225 Difference]: With dead ends: 57840 [2021-11-02 23:06:44,295 INFO L226 Difference]: Without dead ends: 50126 [2021-11-02 23:06:44,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:06:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50126 states. [2021-11-02 23:06:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50126 to 17730. [2021-11-02 23:06:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17728 states have (on average 1.465591155234657) internal successors, (25982), 17729 states have internal predecessors, (25982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 25982 transitions. [2021-11-02 23:06:46,346 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 25982 transitions. Word has length 111 [2021-11-02 23:06:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:46,347 INFO L470 AbstractCegarLoop]: Abstraction has 17730 states and 25982 transitions. [2021-11-02 23:06:46,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:46,347 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 25982 transitions. [2021-11-02 23:06:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 23:06:46,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:46,358 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:46,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:06:46,359 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1506152757, now seen corresponding path program 1 times [2021-11-02 23:06:46,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:46,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363152475] [2021-11-02 23:06:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:46,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:06:46,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:46,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363152475] [2021-11-02 23:06:46,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363152475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:46,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:46,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:06:46,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941166328] [2021-11-02 23:06:46,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:06:46,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:46,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:06:46,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:06:46,507 INFO L87 Difference]: Start difference. First operand 17730 states and 25982 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:50,619 INFO L93 Difference]: Finished difference Result 65552 states and 95509 transitions. [2021-11-02 23:06:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:06:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-02 23:06:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:50,878 INFO L225 Difference]: With dead ends: 65552 [2021-11-02 23:06:50,878 INFO L226 Difference]: Without dead ends: 57838 [2021-11-02 23:06:50,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:06:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57838 states. [2021-11-02 23:06:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57838 to 29314. [2021-11-02 23:06:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29314 states, 29312 states have (on average 1.4535343886462881) internal successors, (42606), 29313 states have internal predecessors, (42606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29314 states to 29314 states and 42606 transitions. [2021-11-02 23:06:53,267 INFO L78 Accepts]: Start accepts. Automaton has 29314 states and 42606 transitions. Word has length 111 [2021-11-02 23:06:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:53,268 INFO L470 AbstractCegarLoop]: Abstraction has 29314 states and 42606 transitions. [2021-11-02 23:06:53,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 29314 states and 42606 transitions. [2021-11-02 23:06:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 23:06:53,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:53,280 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:53,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:06:53,280 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1232465045, now seen corresponding path program 1 times [2021-11-02 23:06:53,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:53,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086100636] [2021-11-02 23:06:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:53,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:06:53,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:53,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086100636] [2021-11-02 23:06:53,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086100636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:53,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:53,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:06:53,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121955240] [2021-11-02 23:06:53,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:06:53,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:06:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:06:53,419 INFO L87 Difference]: Start difference. First operand 29314 states and 42606 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:58,086 INFO L93 Difference]: Finished difference Result 73264 states and 106645 transitions. [2021-11-02 23:06:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:06:58,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-02 23:06:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:58,402 INFO L225 Difference]: With dead ends: 73264 [2021-11-02 23:06:58,402 INFO L226 Difference]: Without dead ends: 65550 [2021-11-02 23:06:58,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:06:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65550 states. [2021-11-02 23:07:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65550 to 37026. [2021-11-02 23:07:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37026 states, 37024 states have (on average 1.4515449438202248) internal successors, (53742), 37025 states have internal predecessors, (53742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37026 states to 37026 states and 53742 transitions. [2021-11-02 23:07:01,836 INFO L78 Accepts]: Start accepts. Automaton has 37026 states and 53742 transitions. Word has length 111 [2021-11-02 23:07:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:01,837 INFO L470 AbstractCegarLoop]: Abstraction has 37026 states and 53742 transitions. [2021-11-02 23:07:01,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 37026 states and 53742 transitions. [2021-11-02 23:07:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 23:07:01,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:01,851 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:01,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:07:01,852 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 586606603, now seen corresponding path program 1 times [2021-11-02 23:07:01,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:01,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139837262] [2021-11-02 23:07:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:01,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:07:01,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:01,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139837262] [2021-11-02 23:07:01,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139837262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:01,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:01,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:07:01,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320189764] [2021-11-02 23:07:01,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:07:01,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:07:01,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:07:01,993 INFO L87 Difference]: Start difference. First operand 37026 states and 53742 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 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) [2021-11-02 23:07:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:07,834 INFO L93 Difference]: Finished difference Result 80976 states and 117781 transitions. [2021-11-02 23:07:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:07:07,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 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) Word has length 111 [2021-11-02 23:07:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:08,001 INFO L225 Difference]: With dead ends: 80976 [2021-11-02 23:07:08,001 INFO L226 Difference]: Without dead ends: 73262 [2021-11-02 23:07:08,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:07:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73262 states. [2021-11-02 23:07:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73262 to 44738. [2021-11-02 23:07:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44738 states, 44736 states have (on average 1.450241416309013) internal successors, (64878), 44737 states have internal predecessors, (64878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44738 states to 44738 states and 64878 transitions. [2021-11-02 23:07:12,424 INFO L78 Accepts]: Start accepts. Automaton has 44738 states and 64878 transitions. Word has length 111 [2021-11-02 23:07:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:12,425 INFO L470 AbstractCegarLoop]: Abstraction has 44738 states and 64878 transitions. [2021-11-02 23:07:12,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 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) [2021-11-02 23:07:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 44738 states and 64878 transitions. [2021-11-02 23:07:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 23:07:12,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:12,441 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:12,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:07:12,442 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash 766012587, now seen corresponding path program 1 times [2021-11-02 23:07:12,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:12,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711248300] [2021-11-02 23:07:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:12,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:07:12,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:12,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711248300] [2021-11-02 23:07:12,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711248300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:12,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:12,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:07:12,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966624695] [2021-11-02 23:07:12,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:07:12,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:07:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:07:12,753 INFO L87 Difference]: Start difference. First operand 44738 states and 64878 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:19,893 INFO L93 Difference]: Finished difference Result 88688 states and 128917 transitions. [2021-11-02 23:07:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:07:19,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-02 23:07:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:20,036 INFO L225 Difference]: With dead ends: 88688 [2021-11-02 23:07:20,036 INFO L226 Difference]: Without dead ends: 80974 [2021-11-02 23:07:20,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:07:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80974 states. [2021-11-02 23:07:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80974 to 52450. [2021-11-02 23:07:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52450 states, 52448 states have (on average 1.4493212324588163) internal successors, (76014), 52449 states have internal predecessors, (76014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 76014 transitions. [2021-11-02 23:07:25,196 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 76014 transitions. Word has length 111 [2021-11-02 23:07:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:25,196 INFO L470 AbstractCegarLoop]: Abstraction has 52450 states and 76014 transitions. [2021-11-02 23:07:25,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 76014 transitions. [2021-11-02 23:07:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 23:07:25,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:25,212 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:25,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:07:25,213 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash -545390527, now seen corresponding path program 1 times [2021-11-02 23:07:25,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:25,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351653659] [2021-11-02 23:07:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:25,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:07:25,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:25,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351653659] [2021-11-02 23:07:25,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351653659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:25,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:25,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:07:25,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405569910] [2021-11-02 23:07:25,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:07:25,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:25,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:07:25,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:07:25,381 INFO L87 Difference]: Start difference. First operand 52450 states and 76014 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)