./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:54:46,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:54:46,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:54:46,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:54:46,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:54:46,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:54:46,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:54:46,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:54:46,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:54:46,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:54:46,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:54:46,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:54:46,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:54:46,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:54:46,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:54:46,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:54:46,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:54:46,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:54:46,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:54:46,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:54:46,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:54:46,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:54:46,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:54:46,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:54:46,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:54:46,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:54:46,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:54:46,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:54:46,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:54:46,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:54:46,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:54:46,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:54:46,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:54:46,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:54:46,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:54:46,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:54:46,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:54:46,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:54:46,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:54:46,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:54:46,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:54:46,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 22:54:46,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:54:46,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:54:46,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:54:46,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:54:46,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:54:46,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:54:46,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:54:46,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:54:46,513 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:54:46,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:54:46,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:54:46,514 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 22:54:46,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:54:46,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:54:46,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:54:46,514 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 22:54:46,514 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 22:54:46,514 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 22:54:46,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:54:46,515 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 22:54:46,515 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:54:46,515 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:54:46,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:54:46,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:54:46,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:54:46,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:54:46,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:54:46,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:54:46,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:54:46,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:54:46,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:54:46,522 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_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2021-12-06 22:54:46,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:54:46,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:54:46,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:54:46,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:54:46,742 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:54:46,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-12-06 22:54:46,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/data/7f5971776/a3d4379559e74634953d045e49426af6/FLAGf4df41279 [2021-12-06 22:54:47,209 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:54:47,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-12-06 22:54:47,219 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/data/7f5971776/a3d4379559e74634953d045e49426af6/FLAGf4df41279 [2021-12-06 22:54:47,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/data/7f5971776/a3d4379559e74634953d045e49426af6 [2021-12-06 22:54:47,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:54:47,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:54:47,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:54:47,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:54:47,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:54:47,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c5022a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47, skipping insertion in model container [2021-12-06 22:54:47,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:54:47,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:54:47,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:54:47,457 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:54:47,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:54:47,506 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:54:47,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47 WrapperNode [2021-12-06 22:54:47,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:54:47,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:54:47,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:54:47,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:54:47,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,540 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-12-06 22:54:47,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:54:47,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:54:47,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:54:47,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:54:47,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:54:47,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:54:47,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:54:47,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:54:47,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (1/1) ... [2021-12-06 22:54:47,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:54:47,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:47,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:54:47,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:54:47,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:54:47,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:54:47,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:54:47,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:54:47,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:54:47,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:54:47,689 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:54:47,690 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:54:47,845 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:54:47,850 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:54:47,850 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 22:54:47,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:54:47 BoogieIcfgContainer [2021-12-06 22:54:47,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:54:47,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:54:47,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:54:47,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:54:47,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:54:47" (1/3) ... [2021-12-06 22:54:47,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2010e838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:54:47, skipping insertion in model container [2021-12-06 22:54:47,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:54:47" (2/3) ... [2021-12-06 22:54:47,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2010e838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:54:47, skipping insertion in model container [2021-12-06 22:54:47,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:54:47" (3/3) ... [2021-12-06 22:54:47,859 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2021-12-06 22:54:47,863 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:54:47,863 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-06 22:54:47,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:54:47,900 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-06 22:54:47,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-06 22:54:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 1.878787878787879) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:54:47,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:47,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:47,917 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:47,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-06 22:54:47,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:47,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914608703] [2021-12-06 22:54:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:47,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914608703] [2021-12-06 22:54:48,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914608703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:48,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:48,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:54:48,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311755607] [2021-12-06 22:54:48,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:48,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:48,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,088 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 1.878787878787879) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:48,135 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-12-06 22:54:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:54:48,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-06 22:54:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:48,143 INFO L225 Difference]: With dead ends: 98 [2021-12-06 22:54:48,143 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 22:54:48,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,147 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:48,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 22:54:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-12-06 22:54:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-06 22:54:48,174 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 7 [2021-12-06 22:54:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:48,174 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-06 22:54:48,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-06 22:54:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:54:48,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:48,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:54:48,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-06 22:54:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:48,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430127069] [2021-12-06 22:54:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430127069] [2021-12-06 22:54:48,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430127069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:48,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:48,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:54:48,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676705310] [2021-12-06 22:54:48,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:48,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:54:48,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:54:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:54:48,228 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:48,256 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-12-06 22:54:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:54:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-06 22:54:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:48,258 INFO L225 Difference]: With dead ends: 52 [2021-12-06 22:54:48,258 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 22:54:48,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:54:48,259 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:48,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:48,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 22:54:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 22:54:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-06 22:54:48,265 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 7 [2021-12-06 22:54:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:48,265 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-06 22:54:48,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-06 22:54:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:54:48,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:48,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:48,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:54:48,266 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-06 22:54:48,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:48,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833792014] [2021-12-06 22:54:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833792014] [2021-12-06 22:54:48,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833792014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:48,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:48,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:54:48,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906879460] [2021-12-06 22:54:48,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:48,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:48,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:48,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:48,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,324 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:48,393 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-12-06 22:54:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:54:48,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-06 22:54:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:48,395 INFO L225 Difference]: With dead ends: 95 [2021-12-06 22:54:48,395 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 22:54:48,396 INFO L932 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 [2021-12-06 22:54:48,397 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:48,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 22:54:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 54. [2021-12-06 22:54:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-06 22:54:48,405 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 7 [2021-12-06 22:54:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:48,405 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-06 22:54:48,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-06 22:54:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 22:54:48,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:48,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:48,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:54:48,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:48,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-06 22:54:48,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:48,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869091940] [2021-12-06 22:54:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869091940] [2021-12-06 22:54:48,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869091940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:48,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:48,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:54:48,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570084484] [2021-12-06 22:54:48,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:48,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:48,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,469 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:48,493 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-06 22:54:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:54:48,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-06 22:54:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:48,494 INFO L225 Difference]: With dead ends: 53 [2021-12-06 22:54:48,494 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 22:54:48,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,496 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:48,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 37 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 22:54:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 22:54:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-06 22:54:48,502 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 9 [2021-12-06 22:54:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:48,502 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-06 22:54:48,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-06 22:54:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 22:54:48,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:48,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:48,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:54:48,504 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-06 22:54:48,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:48,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123050334] [2021-12-06 22:54:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123050334] [2021-12-06 22:54:48,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123050334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:48,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:48,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:54:48,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484297147] [2021-12-06 22:54:48,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:48,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:48,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,541 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:48,554 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-06 22:54:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:54:48,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-06 22:54:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:48,556 INFO L225 Difference]: With dead ends: 96 [2021-12-06 22:54:48,556 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 22:54:48,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,557 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:48,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 22:54:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-12-06 22:54:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.5625) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-12-06 22:54:48,562 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 9 [2021-12-06 22:54:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:48,563 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-12-06 22:54:48,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-12-06 22:54:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 22:54:48,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:48,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:48,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:54:48,564 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-06 22:54:48,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:48,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363715599] [2021-12-06 22:54:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363715599] [2021-12-06 22:54:48,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363715599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:48,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:48,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:54:48,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572015828] [2021-12-06 22:54:48,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:48,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:54:48,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:54:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:54:48,601 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:48,640 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2021-12-06 22:54:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:54:48,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-06 22:54:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:48,641 INFO L225 Difference]: With dead ends: 100 [2021-12-06 22:54:48,641 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 22:54:48,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:54:48,642 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 120 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:48,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 66 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 22:54:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2021-12-06 22:54:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-06 22:54:48,647 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 9 [2021-12-06 22:54:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:48,647 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-06 22:54:48,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-06 22:54:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 22:54:48,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:48,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:48,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:54:48,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-06 22:54:48,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:48,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096768246] [2021-12-06 22:54:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096768246] [2021-12-06 22:54:48,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096768246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:48,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:48,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:54:48,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439748841] [2021-12-06 22:54:48,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:48,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:54:48,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:54:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:54:48,692 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:48,746 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2021-12-06 22:54:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:54:48,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-06 22:54:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:48,747 INFO L225 Difference]: With dead ends: 96 [2021-12-06 22:54:48,747 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 22:54:48,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:48,748 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:48,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 85 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 22:54:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-12-06 22:54:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.52) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-12-06 22:54:48,753 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 9 [2021-12-06 22:54:48,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:48,753 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-12-06 22:54:48,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-12-06 22:54:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 22:54:48,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:48,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:48,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:54:48,755 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:48,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-06 22:54:48,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965155488] [2021-12-06 22:54:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965155488] [2021-12-06 22:54:48,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965155488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:48,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:48,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:54:48,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985666347] [2021-12-06 22:54:48,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:48,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:48,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,798 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:48,817 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-12-06 22:54:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:54:48,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-06 22:54:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:48,818 INFO L225 Difference]: With dead ends: 63 [2021-12-06 22:54:48,818 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 22:54:48,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:48,819 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:48,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 22:54:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-06 22:54:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.5) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-06 22:54:48,825 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 10 [2021-12-06 22:54:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:48,825 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-06 22:54:48,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-06 22:54:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:54:48,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:48,826 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:48,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:54:48,827 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:48,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-06 22:54:48,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655745374] [2021-12-06 22:54:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:48,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655745374] [2021-12-06 22:54:48,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655745374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410878531] [2021-12-06 22:54:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:48,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:48,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:48,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:48,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:54:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 22:54:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:54:49,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:54:49,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:54:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:49,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:49,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410878531] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:49,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:49,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-06 22:54:49,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087571982] [2021-12-06 22:54:49,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:49,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:54:49,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:54:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:54:49,218 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:49,355 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2021-12-06 22:54:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:54:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 11 [2021-12-06 22:54:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:49,356 INFO L225 Difference]: With dead ends: 146 [2021-12-06 22:54:49,356 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 22:54:49,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:54:49,357 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 198 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:49,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 252 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 22:54:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 58. [2021-12-06 22:54:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-12-06 22:54:49,363 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 11 [2021-12-06 22:54:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:49,363 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-12-06 22:54:49,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-12-06 22:54:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 22:54:49,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:49,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:49,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:54:49,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:49,565 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2021-12-06 22:54:49,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:49,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383999881] [2021-12-06 22:54:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:49,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:49,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:49,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383999881] [2021-12-06 22:54:49,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383999881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:49,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:54:49,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55596900] [2021-12-06 22:54:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:49,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:54:49,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:54:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:49,605 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:49,648 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-12-06 22:54:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:54:49,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-06 22:54:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:49,649 INFO L225 Difference]: With dead ends: 81 [2021-12-06 22:54:49,649 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 22:54:49,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:54:49,650 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:49,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 63 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:49,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 22:54:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2021-12-06 22:54:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-12-06 22:54:49,655 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 12 [2021-12-06 22:54:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:49,655 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-12-06 22:54:49,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-12-06 22:54:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 22:54:49,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:49,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:49,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:54:49,656 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-12-06 22:54:49,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:49,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095822479] [2021-12-06 22:54:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:49,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:49,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095822479] [2021-12-06 22:54:49,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095822479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:49,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:49,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:54:49,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9297204] [2021-12-06 22:54:49,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:49,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:49,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:49,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:49,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:49,683 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:49,704 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-12-06 22:54:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:54:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-06 22:54:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:49,705 INFO L225 Difference]: With dead ends: 63 [2021-12-06 22:54:49,705 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 22:54:49,705 INFO L932 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 [2021-12-06 22:54:49,705 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:49,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 22:54:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-06 22:54:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-06 22:54:49,708 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 12 [2021-12-06 22:54:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:49,708 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-06 22:54:49,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-06 22:54:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:54:49,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:49,709 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:49,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:54:49,709 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-06 22:54:49,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:49,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87727452] [2021-12-06 22:54:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:49,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:49,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:49,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87727452] [2021-12-06 22:54:49,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87727452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:49,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145711286] [2021-12-06 22:54:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:49,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:49,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:49,753 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:49,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:54:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:49,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:54:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:49,811 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:54:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:54:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:49,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:50,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145711286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:50,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:50,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 22:54:50,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628041025] [2021-12-06 22:54:50,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:50,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:54:50,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:54:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:54:50,004 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:50,122 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2021-12-06 22:54:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:54:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 13 [2021-12-06 22:54:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:50,124 INFO L225 Difference]: With dead ends: 133 [2021-12-06 22:54:50,124 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 22:54:50,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:54:50,125 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 195 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:50,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 201 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 22:54:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 60. [2021-12-06 22:54:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-06 22:54:50,129 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 13 [2021-12-06 22:54:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:50,130 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-06 22:54:50,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-06 22:54:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 22:54:50,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:50,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:50,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:54:50,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:50,332 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1432374396, now seen corresponding path program 1 times [2021-12-06 22:54:50,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:50,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241405425] [2021-12-06 22:54:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:50,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:50,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:50,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241405425] [2021-12-06 22:54:50,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241405425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:50,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:50,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:54:50,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913628819] [2021-12-06 22:54:50,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:50,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:50,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:50,425 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:50,492 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-12-06 22:54:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:54:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-06 22:54:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:50,494 INFO L225 Difference]: With dead ends: 58 [2021-12-06 22:54:50,494 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 22:54:50,494 INFO L932 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 [2021-12-06 22:54:50,495 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:50,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 22:54:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-06 22:54:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-06 22:54:50,499 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 16 [2021-12-06 22:54:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:50,500 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-06 22:54:50,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-06 22:54:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 22:54:50,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:50,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:50,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:54:50,501 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1432374395, now seen corresponding path program 1 times [2021-12-06 22:54:50,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:50,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402502527] [2021-12-06 22:54:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:50,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:50,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:50,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402502527] [2021-12-06 22:54:50,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402502527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:50,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:50,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:54:50,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353208938] [2021-12-06 22:54:50,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:50,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:54:50,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:54:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:50,558 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:50,591 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-12-06 22:54:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:54:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-06 22:54:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:50,592 INFO L225 Difference]: With dead ends: 66 [2021-12-06 22:54:50,592 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 22:54:50,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:54:50,593 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 122 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:50,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 58 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 22:54:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-06 22:54:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-12-06 22:54:50,595 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 16 [2021-12-06 22:54:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:50,595 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-12-06 22:54:50,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-12-06 22:54:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 22:54:50,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:50,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:50,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 22:54:50,596 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1432365322, now seen corresponding path program 1 times [2021-12-06 22:54:50,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:50,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445993382] [2021-12-06 22:54:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:50,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:50,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445993382] [2021-12-06 22:54:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445993382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:50,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:54:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852189399] [2021-12-06 22:54:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:50,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:54:50,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:54:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:54:50,614 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:50,618 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-12-06 22:54:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:54:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-06 22:54:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:50,619 INFO L225 Difference]: With dead ends: 62 [2021-12-06 22:54:50,619 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 22:54:50,619 INFO L932 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 [2021-12-06 22:54:50,620 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:50,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 22:54:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-06 22:54:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-12-06 22:54:50,622 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 16 [2021-12-06 22:54:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:50,622 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-12-06 22:54:50,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-12-06 22:54:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 22:54:50,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:50,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:50,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 22:54:50,623 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:50,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1365500555, now seen corresponding path program 1 times [2021-12-06 22:54:50,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:50,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882581089] [2021-12-06 22:54:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:50,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:50,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882581089] [2021-12-06 22:54:50,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882581089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:50,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:50,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:54:50,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841988478] [2021-12-06 22:54:50,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:50,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:54:50,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:54:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:54:50,696 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:50,767 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-12-06 22:54:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:54:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-06 22:54:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:50,768 INFO L225 Difference]: With dead ends: 85 [2021-12-06 22:54:50,768 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 22:54:50,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:54:50,769 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:50,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 218 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 22:54:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-12-06 22:54:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2021-12-06 22:54:50,773 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 19 [2021-12-06 22:54:50,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:50,773 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2021-12-06 22:54:50,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2021-12-06 22:54:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 22:54:50,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:50,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:50,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 22:54:50,778 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1341118839, now seen corresponding path program 1 times [2021-12-06 22:54:50,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:50,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540462934] [2021-12-06 22:54:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:50,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:50,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:50,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540462934] [2021-12-06 22:54:50,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540462934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:50,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:50,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 22:54:50,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636353880] [2021-12-06 22:54:50,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:50,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:54:50,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:50,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:54:50,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:54:50,889 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:50,982 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-12-06 22:54:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:54:50,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-06 22:54:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:50,983 INFO L225 Difference]: With dead ends: 106 [2021-12-06 22:54:50,983 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 22:54:50,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:54:50,984 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:50,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 199 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 22:54:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2021-12-06 22:54:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.267605633802817) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-12-06 22:54:50,988 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 19 [2021-12-06 22:54:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:50,988 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-12-06 22:54:50,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-12-06 22:54:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:54:50,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:50,989 INFO L514 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] [2021-12-06 22:54:50,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 22:54:50,990 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1756023060, now seen corresponding path program 1 times [2021-12-06 22:54:50,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:50,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118623943] [2021-12-06 22:54:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:50,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:51,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118623943] [2021-12-06 22:54:51,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118623943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:51,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:51,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 22:54:51,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574764351] [2021-12-06 22:54:51,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:51,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:54:51,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:54:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:54:51,132 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:51,348 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2021-12-06 22:54:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:54:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-06 22:54:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:51,349 INFO L225 Difference]: With dead ends: 134 [2021-12-06 22:54:51,349 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 22:54:51,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:54:51,350 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 142 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:51,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 367 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 22:54:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-12-06 22:54:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 94 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) [2021-12-06 22:54:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2021-12-06 22:54:51,352 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 23 [2021-12-06 22:54:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:51,353 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2021-12-06 22:54:51,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2021-12-06 22:54:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:54:51,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:51,353 INFO L514 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] [2021-12-06 22:54:51,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 22:54:51,353 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:51,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1756082642, now seen corresponding path program 1 times [2021-12-06 22:54:51,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:51,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411406238] [2021-12-06 22:54:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:51,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:51,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:51,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411406238] [2021-12-06 22:54:51,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411406238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:51,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:51,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:54:51,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255237830] [2021-12-06 22:54:51,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:51,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:54:51,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:54:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:54:51,417 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:51,440 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-06 22:54:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:54:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-06 22:54:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:51,440 INFO L225 Difference]: With dead ends: 94 [2021-12-06 22:54:51,440 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 22:54:51,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:54:51,441 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:51,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:54:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 22:54:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-12-06 22:54:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-06 22:54:51,443 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 23 [2021-12-06 22:54:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:51,443 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-06 22:54:51,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-06 22:54:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:54:51,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:51,444 INFO L514 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] [2021-12-06 22:54:51,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 22:54:51,444 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1222026810, now seen corresponding path program 1 times [2021-12-06 22:54:51,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:51,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134563979] [2021-12-06 22:54:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:51,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:51,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:51,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134563979] [2021-12-06 22:54:51,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134563979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:51,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969147958] [2021-12-06 22:54:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:51,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:51,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:51,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:51,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:54:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:54:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:51,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:54:51,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:54:51,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:54:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:51,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:51,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969147958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:51,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:51,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-12-06 22:54:51,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819959684] [2021-12-06 22:54:51,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:54:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:54:51,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:54:51,793 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:51,936 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-12-06 22:54:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:54:51,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 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 23 [2021-12-06 22:54:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:51,937 INFO L225 Difference]: With dead ends: 66 [2021-12-06 22:54:51,937 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 22:54:51,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:54:51,938 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 184 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:51,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 164 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 22:54:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-12-06 22:54:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-06 22:54:51,940 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 23 [2021-12-06 22:54:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:51,941 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-06 22:54:51,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-06 22:54:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:54:51,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:51,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:51,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:54:52,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:52,143 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash 340221504, now seen corresponding path program 1 times [2021-12-06 22:54:52,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:52,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567391408] [2021-12-06 22:54:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:52,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:52,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:52,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567391408] [2021-12-06 22:54:52,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567391408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:52,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325078273] [2021-12-06 22:54:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:52,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:52,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:52,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:52,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:54:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 22:54:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:52,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:54:52,618 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:54:52,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 22:54:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:54:52,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:54:52,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325078273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:52,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:54:52,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2021-12-06 22:54:52,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740227470] [2021-12-06 22:54:52,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:52,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:54:52,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:54:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:54:52,640 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:52,800 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-12-06 22:54:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:54:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-06 22:54:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:52,801 INFO L225 Difference]: With dead ends: 58 [2021-12-06 22:54:52,801 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 22:54:52,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:54:52,802 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:52,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 146 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-06 22:54:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 22:54:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-06 22:54:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-06 22:54:52,804 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 27 [2021-12-06 22:54:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:52,804 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-06 22:54:52,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-06 22:54:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:54:52,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:52,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:52,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:54:53,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:53,006 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash 206207998, now seen corresponding path program 1 times [2021-12-06 22:54:53,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:53,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869222066] [2021-12-06 22:54:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:53,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:54:53,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:53,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869222066] [2021-12-06 22:54:53,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869222066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:53,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:53,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 22:54:53,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951425619] [2021-12-06 22:54:53,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:53,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:54:53,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:54:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:54:53,240 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:53,400 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-12-06 22:54:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:54:53,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-06 22:54:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:53,401 INFO L225 Difference]: With dead ends: 54 [2021-12-06 22:54:53,401 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 22:54:53,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:54:53,402 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:53,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 189 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 22:54:53,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-12-06 22:54:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-06 22:54:53,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 27 [2021-12-06 22:54:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:53,404 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-06 22:54:53,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-06 22:54:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 22:54:53,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:53,405 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:54:53,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 22:54:53,405 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2033318401, now seen corresponding path program 1 times [2021-12-06 22:54:53,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:53,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143658132] [2021-12-06 22:54:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:53,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:54:53,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:53,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143658132] [2021-12-06 22:54:53,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143658132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:53,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926009569] [2021-12-06 22:54:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:53,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:53,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:53,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:54:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:53,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 22:54:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:54:53,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:53,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:54:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:54:53,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926009569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:53,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:53,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-06 22:54:53,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738414064] [2021-12-06 22:54:53,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:53,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:54:53,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:54:53,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:54:53,699 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:53,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:53,816 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-12-06 22:54:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:54:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 22:54:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:53,817 INFO L225 Difference]: With dead ends: 57 [2021-12-06 22:54:53,817 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 22:54:53,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:54:53,818 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 210 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:53,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 114 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 22:54:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-06 22:54:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-06 22:54:53,820 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2021-12-06 22:54:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:53,821 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-06 22:54:53,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-06 22:54:53,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 22:54:53,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:53,821 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:54:53,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:54:54,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 22:54:54,023 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1630243463, now seen corresponding path program 1 times [2021-12-06 22:54:54,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:54,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284795104] [2021-12-06 22:54:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:54,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:54:54,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284795104] [2021-12-06 22:54:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284795104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40872083] [2021-12-06 22:54:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:54,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:54,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:54,176 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:54,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:54:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:54,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 22:54:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:54,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:54:54,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:54:54,759 INFO L354 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2021-12-06 22:54:54,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-06 22:54:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:54:54,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:55,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:54:55,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:54:55,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:54:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:54:55,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40872083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:55,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:55,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 38 [2021-12-06 22:54:55,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617444367] [2021-12-06 22:54:55,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:55,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:54:55,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:54:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:54:55,242 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:55,736 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-12-06 22:54:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 22:54:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 22:54:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:55,737 INFO L225 Difference]: With dead ends: 115 [2021-12-06 22:54:55,737 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 22:54:55,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=373, Invalid=3287, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 22:54:55,739 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:55,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 295 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 248 Invalid, 0 Unknown, 194 Unchecked, 0.1s Time] [2021-12-06 22:54:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 22:54:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-12-06 22:54:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-12-06 22:54:55,741 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 34 [2021-12-06 22:54:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:55,741 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-12-06 22:54:55,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-12-06 22:54:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 22:54:55,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:55,741 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:54:55,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:54:55,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 22:54:55,942 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 143338355, now seen corresponding path program 2 times [2021-12-06 22:54:55,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:55,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754016204] [2021-12-06 22:54:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:55,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:56,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754016204] [2021-12-06 22:54:56,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754016204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854099516] [2021-12-06 22:54:56,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:54:56,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:56,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:56,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:54:56,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:54:56,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:54:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 22:54:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:56,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:56,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:54:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:56,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854099516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:56,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:56,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-06 22:54:56,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232076128] [2021-12-06 22:54:56,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:56,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:54:56,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:54:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:54:56,263 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:56,391 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-12-06 22:54:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:54:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 42 [2021-12-06 22:54:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:56,392 INFO L225 Difference]: With dead ends: 68 [2021-12-06 22:54:56,392 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 22:54:56,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:54:56,393 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 181 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:56,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 170 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 22:54:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-12-06 22:54:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-12-06 22:54:56,395 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 42 [2021-12-06 22:54:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:56,395 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-12-06 22:54:56,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-12-06 22:54:56,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 22:54:56,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:56,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:56,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:54:56,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:56,598 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash 794074873, now seen corresponding path program 2 times [2021-12-06 22:54:56,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:56,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385937482] [2021-12-06 22:54:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:56,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:56,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385937482] [2021-12-06 22:54:56,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385937482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117062758] [2021-12-06 22:54:56,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:54:56,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:56,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:56,722 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:56,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:54:56,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:54:56,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:54:56,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 22:54:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:56,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:54:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:56,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117062758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:56,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:56,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-06 22:54:56,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123504403] [2021-12-06 22:54:56,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:56,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:54:56,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:54:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:54:56,986 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:57,156 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-12-06 22:54:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:54:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-06 22:54:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:57,156 INFO L225 Difference]: With dead ends: 66 [2021-12-06 22:54:57,157 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 22:54:57,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:54:57,157 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 263 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:57,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 209 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:54:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 22:54:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-06 22:54:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-06 22:54:57,159 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2021-12-06 22:54:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:57,159 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-06 22:54:57,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-06 22:54:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 22:54:57,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:57,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:57,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:54:57,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 22:54:57,362 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash -395309695, now seen corresponding path program 3 times [2021-12-06 22:54:57,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:57,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145364098] [2021-12-06 22:54:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:57,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:57,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:57,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145364098] [2021-12-06 22:54:57,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145364098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:57,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820980660] [2021-12-06 22:54:57,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:54:57,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:57,535 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:57,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:54:57,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:54:57,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:54:57,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 22:54:57,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:57,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:54:57,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:54:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 22:54:57,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:54:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:57,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:57,881 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_382 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-06 22:54:57,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:54:57,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:54:57,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:54:57,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:54:57,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:54:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:58,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820980660] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:58,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:58,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 25 [2021-12-06 22:54:58,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350857014] [2021-12-06 22:54:58,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:58,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 22:54:58,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 22:54:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=484, Unknown=1, NotChecked=44, Total=600 [2021-12-06 22:54:58,026 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 25 states, 25 states have (on average 3.44) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:58,241 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-12-06 22:54:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:54:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 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 49 [2021-12-06 22:54:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:58,242 INFO L225 Difference]: With dead ends: 97 [2021-12-06 22:54:58,242 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 22:54:58,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=825, Unknown=1, NotChecked=60, Total=1056 [2021-12-06 22:54:58,243 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:58,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 408 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 397 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-12-06 22:54:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 22:54:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-12-06 22:54:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-12-06 22:54:58,245 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 49 [2021-12-06 22:54:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:58,245 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-12-06 22:54:58,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-12-06 22:54:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 22:54:58,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:58,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:58,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:54:58,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:58,446 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:54:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1474391036, now seen corresponding path program 4 times [2021-12-06 22:54:58,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:58,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294865266] [2021-12-06 22:54:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:58,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:54:58,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:58,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294865266] [2021-12-06 22:54:58,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294865266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:58,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368025981] [2021-12-06 22:54:58,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:54:58,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:58,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:58,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:58,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:54:58,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:54:58,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:54:58,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 22:54:58,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:58,629 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:54:58,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:54:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:54:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:54:59,107 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:54:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-12-06 22:54:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:54:59,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:59,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:54:59,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 22:54:59,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 22:55:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:55:00,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368025981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:00,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:00,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 42 [2021-12-06 22:55:00,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125721328] [2021-12-06 22:55:00,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:00,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 22:55:00,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 22:55:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 22:55:00,021 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:00,625 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-12-06 22:55:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 22:55:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 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 53 [2021-12-06 22:55:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:00,626 INFO L225 Difference]: With dead ends: 110 [2021-12-06 22:55:00,626 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 22:55:00,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=3712, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 22:55:00,628 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:00,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 509 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 557 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2021-12-06 22:55:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 22:55:00,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2021-12-06 22:55:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-12-06 22:55:00,629 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 53 [2021-12-06 22:55:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:00,629 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-12-06 22:55:00,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-12-06 22:55:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 22:55:00,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:00,630 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:00,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 22:55:00,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 22:55:00,832 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:00,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1346900531, now seen corresponding path program 3 times [2021-12-06 22:55:00,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:00,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094231193] [2021-12-06 22:55:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:00,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:55:00,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:00,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094231193] [2021-12-06 22:55:00,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094231193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:00,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100897419] [2021-12-06 22:55:00,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:55:00,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:00,976 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:00,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:55:01,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:55:01,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 22:55:01,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:01,069 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:55:01,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:55:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:55:01,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:55:01,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100897419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:01,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:01,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-06 22:55:01,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344556846] [2021-12-06 22:55:01,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:01,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:55:01,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:01,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:55:01,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:55:01,550 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:01,731 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-12-06 22:55:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:55:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 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 61 [2021-12-06 22:55:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:01,732 INFO L225 Difference]: With dead ends: 81 [2021-12-06 22:55:01,732 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 22:55:01,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:55:01,733 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:01,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 268 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:55:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 22:55:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-06 22:55:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 74 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) [2021-12-06 22:55:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-12-06 22:55:01,735 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 61 [2021-12-06 22:55:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:01,735 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-12-06 22:55:01,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-12-06 22:55:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 22:55:01,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:01,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:01,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 22:55:01,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 22:55:01,937 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1929224659, now seen corresponding path program 5 times [2021-12-06 22:55:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:01,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779739366] [2021-12-06 22:55:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:01,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:55:02,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:02,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779739366] [2021-12-06 22:55:02,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779739366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:02,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731372503] [2021-12-06 22:55:02,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:55:02,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:02,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:02,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:55:02,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 22:55:02,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 22:55:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:02,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:02,673 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 22:55:02,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-06 22:55:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:55:02,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:03,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:03,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:55:03,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:55:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:55:03,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731372503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:03,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:03,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 43 [2021-12-06 22:55:03,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76586541] [2021-12-06 22:55:03,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:03,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 22:55:03,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:03,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 22:55:03,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 22:55:03,199 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:03,993 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2021-12-06 22:55:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 22:55:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 22:55:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:03,994 INFO L225 Difference]: With dead ends: 195 [2021-12-06 22:55:03,994 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 22:55:03,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=314, Invalid=4242, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:55:03,995 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:03,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 706 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 642 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2021-12-06 22:55:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 22:55:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-12-06 22:55:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.0625) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-12-06 22:55:03,997 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 64 [2021-12-06 22:55:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:03,997 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-12-06 22:55:03,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-12-06 22:55:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 22:55:03,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:03,998 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:04,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:55:04,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:04,199 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1604493991, now seen corresponding path program 6 times [2021-12-06 22:55:04,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:04,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28559412] [2021-12-06 22:55:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:04,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:04,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28559412] [2021-12-06 22:55:04,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28559412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911970405] [2021-12-06 22:55:04,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:55:04,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:04,358 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:04,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:55:04,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 22:55:04,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:04,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 22:55:04,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:04,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:04,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:55:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:05,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911970405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:05,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:05,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2021-12-06 22:55:05,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398518015] [2021-12-06 22:55:05,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:05,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:55:05,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:55:05,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:55:05,010 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:05,239 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-12-06 22:55:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:55:05,240 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 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 72 [2021-12-06 22:55:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:05,240 INFO L225 Difference]: With dead ends: 98 [2021-12-06 22:55:05,240 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 22:55:05,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:55:05,241 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 453 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:05,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 244 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:55:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 22:55:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2021-12-06 22:55:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-12-06 22:55:05,243 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 72 [2021-12-06 22:55:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:05,243 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-12-06 22:55:05,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.870967741935484) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-12-06 22:55:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 22:55:05,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:05,244 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:05,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:55:05,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 22:55:05,445 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1296737235, now seen corresponding path program 4 times [2021-12-06 22:55:05,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:05,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549907919] [2021-12-06 22:55:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:05,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:05,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:05,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549907919] [2021-12-06 22:55:05,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549907919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:05,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590228909] [2021-12-06 22:55:05,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:55:05,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:05,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:05,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:05,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:55:05,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:55:05,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:05,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 22:55:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:05,678 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:55:05,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:55:05,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 22:55:06,219 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-06 22:55:06,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-06 22:55:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:06,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:06,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:06,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:55:06,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:55:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:07,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590228909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:07,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:07,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20, 20] total 50 [2021-12-06 22:55:07,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305061782] [2021-12-06 22:55:07,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:07,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 22:55:07,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:07,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 22:55:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2280, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 22:55:07,574 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 51 states, 50 states have (on average 3.68) internal successors, (184), 51 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:08,663 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-12-06 22:55:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 22:55:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.68) internal successors, (184), 51 states have internal predecessors, (184), 0 states have call successors, (0), 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 76 [2021-12-06 22:55:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:08,664 INFO L225 Difference]: With dead ends: 108 [2021-12-06 22:55:08,664 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 22:55:08,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=762, Invalid=4640, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 22:55:08,666 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 462 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:08,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 383 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 585 Invalid, 0 Unknown, 234 Unchecked, 0.2s Time] [2021-12-06 22:55:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 22:55:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-12-06 22:55:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.0638297872340425) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-12-06 22:55:08,668 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 76 [2021-12-06 22:55:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:08,668 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-12-06 22:55:08,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.68) internal successors, (184), 51 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-12-06 22:55:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 22:55:08,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:08,669 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:08,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:55:08,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:08,870 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:08,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2131874765, now seen corresponding path program 7 times [2021-12-06 22:55:08,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:08,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24008095] [2021-12-06 22:55:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:08,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:09,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:09,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24008095] [2021-12-06 22:55:09,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24008095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:09,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941875493] [2021-12-06 22:55:09,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:55:09,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:09,084 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:09,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:55:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:09,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 22:55:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:09,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:09,803 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-06 22:55:09,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-06 22:55:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 5 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:09,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:10,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:10,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:55:10,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:55:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 5 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:55:10,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941875493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:10,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:10,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 48 [2021-12-06 22:55:10,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484180555] [2021-12-06 22:55:10,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:10,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:55:10,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:55:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:55:10,419 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:11,447 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2021-12-06 22:55:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 22:55:11,447 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 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 [2021-12-06 22:55:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:11,448 INFO L225 Difference]: With dead ends: 242 [2021-12-06 22:55:11,448 INFO L226 Difference]: Without dead ends: 111 [2021-12-06 22:55:11,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 127 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=360, Invalid=5646, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 22:55:11,450 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:11,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 983 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 971 Invalid, 0 Unknown, 430 Unchecked, 0.2s Time] [2021-12-06 22:55:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-06 22:55:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-12-06 22:55:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-12-06 22:55:11,452 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 79 [2021-12-06 22:55:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-12-06 22:55:11,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-12-06 22:55:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 22:55:11,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:11,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:11,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:55:11,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:11,654 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash -418354157, now seen corresponding path program 8 times [2021-12-06 22:55:11,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809207956] [2021-12-06 22:55:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:11,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:55:11,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809207956] [2021-12-06 22:55:11,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809207956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645427850] [2021-12-06 22:55:11,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:55:11,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:11,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:11,829 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:11,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:55:11,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:55:11,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 22:55:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:55:12,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:12,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:55:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:55:12,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645427850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:12,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:12,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-12-06 22:55:12,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098042958] [2021-12-06 22:55:12,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:12,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:55:12,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:55:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:55:12,292 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 32 states, 31 states have (on average 4.774193548387097) internal successors, (148), 32 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:12,563 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-12-06 22:55:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:55:12,563 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.774193548387097) internal successors, (148), 32 states have internal predecessors, (148), 0 states have call successors, (0), 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 87 [2021-12-06 22:55:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:12,564 INFO L225 Difference]: With dead ends: 107 [2021-12-06 22:55:12,564 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 22:55:12,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 22:55:12,565 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 497 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:12,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 433 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:55:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 22:55:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-12-06 22:55:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-12-06 22:55:12,567 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 87 [2021-12-06 22:55:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:12,567 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-12-06 22:55:12,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.774193548387097) internal successors, (148), 32 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-12-06 22:55:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 22:55:12,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:12,568 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:12,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 22:55:12,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 22:55:12,769 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash -767633183, now seen corresponding path program 9 times [2021-12-06 22:55:12,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:12,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204082060] [2021-12-06 22:55:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:12,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:55:13,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:13,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204082060] [2021-12-06 22:55:13,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204082060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:13,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704597188] [2021-12-06 22:55:13,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:55:13,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:13,021 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:13,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:55:13,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 22:55:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 22:55:13,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:55:13,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:13,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:55:13,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:55:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:55:13,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:13,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_789 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_789) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-06 22:55:13,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:13,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:55:13,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:13,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:55:13,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:55:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:55:13,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704597188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:13,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:13,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 35 [2021-12-06 22:55:13,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937966378] [2021-12-06 22:55:13,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:13,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:55:13,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:55:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1025, Unknown=1, NotChecked=64, Total=1190 [2021-12-06 22:55:13,958 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 35 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:14,401 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2021-12-06 22:55:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:55:14,401 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 35 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-06 22:55:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:14,402 INFO L225 Difference]: With dead ends: 175 [2021-12-06 22:55:14,402 INFO L226 Difference]: Without dead ends: 112 [2021-12-06 22:55:14,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=2140, Unknown=1, NotChecked=94, Total=2450 [2021-12-06 22:55:14,403 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 120 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:14,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 590 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 748 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2021-12-06 22:55:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-06 22:55:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-12-06 22:55:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-12-06 22:55:14,405 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 94 [2021-12-06 22:55:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:14,406 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-12-06 22:55:14,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 35 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-12-06 22:55:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 22:55:14,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:14,407 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:14,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 22:55:14,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 22:55:14,608 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash 832539454, now seen corresponding path program 10 times [2021-12-06 22:55:14,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:14,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878662394] [2021-12-06 22:55:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:14,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:55:14,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878662394] [2021-12-06 22:55:14,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878662394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375750275] [2021-12-06 22:55:14,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:55:14,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:14,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:14,809 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:14,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:55:14,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:55:14,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:14,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 22:55:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:14,900 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:55:14,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:55:15,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:55:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:55:15,721 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:55:15,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-12-06 22:55:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 101 proven. 55 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:15,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:16,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:16,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 22:55:16,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 22:55:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375750275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:17,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:17,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 60 [2021-12-06 22:55:17,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941419011] [2021-12-06 22:55:17,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:17,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 22:55:17,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 22:55:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3207, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 22:55:17,392 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 60 states, 60 states have (on average 3.8) internal successors, (228), 60 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:18,318 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2021-12-06 22:55:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 22:55:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.8) internal successors, (228), 60 states have internal predecessors, (228), 0 states have call successors, (0), 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 98 [2021-12-06 22:55:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:18,320 INFO L225 Difference]: With dead ends: 176 [2021-12-06 22:55:18,320 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 22:55:18,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=880, Invalid=7492, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 22:55:18,323 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 262 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:18,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 895 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 733 Invalid, 0 Unknown, 491 Unchecked, 0.2s Time] [2021-12-06 22:55:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 22:55:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2021-12-06 22:55:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2021-12-06 22:55:18,326 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 98 [2021-12-06 22:55:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:18,326 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2021-12-06 22:55:18,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.8) internal successors, (228), 60 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2021-12-06 22:55:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 22:55:18,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:18,327 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:18,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 22:55:18,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 22:55:18,528 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1419555999, now seen corresponding path program 5 times [2021-12-06 22:55:18,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:18,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535875112] [2021-12-06 22:55:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:18,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 28 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:18,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:18,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535875112] [2021-12-06 22:55:18,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535875112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:18,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214312896] [2021-12-06 22:55:18,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:55:18,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:18,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:18,733 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:18,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:55:18,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 22:55:18,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 22:55:18,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:18,965 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:55:18,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:55:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 28 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:19,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:19,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214312896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:19,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:19,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2021-12-06 22:55:19,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118132726] [2021-12-06 22:55:19,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:19,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:55:19,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:55:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:55:19,907 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 46 states, 45 states have (on average 5.2444444444444445) internal successors, (236), 46 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:20,239 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2021-12-06 22:55:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 22:55:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 5.2444444444444445) internal successors, (236), 46 states have internal predecessors, (236), 0 states have call successors, (0), 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 106 [2021-12-06 22:55:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:20,240 INFO L225 Difference]: With dead ends: 126 [2021-12-06 22:55:20,240 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 22:55:20,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=568, Invalid=2402, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 22:55:20,240 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 621 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:20,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 581 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:55:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 22:55:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-12-06 22:55:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 119 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-12-06 22:55:20,243 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 106 [2021-12-06 22:55:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:20,243 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-12-06 22:55:20,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 5.2444444444444445) internal successors, (236), 46 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-12-06 22:55:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 22:55:20,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:20,244 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:20,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 22:55:20,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 22:55:20,445 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1744754663, now seen corresponding path program 11 times [2021-12-06 22:55:20,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432801425] [2021-12-06 22:55:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:20,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:20,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432801425] [2021-12-06 22:55:20,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432801425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745499120] [2021-12-06 22:55:20,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:55:20,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:20,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:20,727 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:20,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 22:55:20,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 22:55:20,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:20,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:55:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:20,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:55:21,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:21,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:55:21,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:21,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 22:55:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 45 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:21,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:22,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:22,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:55:22,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:22,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:55:22,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:55:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 22:55:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 45 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:22,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745499120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:22,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:22,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 60 [2021-12-06 22:55:22,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043791582] [2021-12-06 22:55:22,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:22,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 22:55:22,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 22:55:22,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3240, Unknown=1, NotChecked=0, Total=3540 [2021-12-06 22:55:22,907 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 60 states, 60 states have (on average 4.316666666666666) internal successors, (259), 60 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:23,770 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2021-12-06 22:55:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 22:55:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.316666666666666) internal successors, (259), 60 states have internal predecessors, (259), 0 states have call successors, (0), 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 109 [2021-12-06 22:55:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:23,771 INFO L225 Difference]: With dead ends: 216 [2021-12-06 22:55:23,771 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 22:55:23,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=540, Invalid=5465, Unknown=1, NotChecked=0, Total=6006 [2021-12-06 22:55:23,772 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 224 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:23,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1209 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1099 Invalid, 0 Unknown, 211 Unchecked, 0.3s Time] [2021-12-06 22:55:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 22:55:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2021-12-06 22:55:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 126 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-12-06 22:55:23,776 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 109 [2021-12-06 22:55:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:23,776 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-12-06 22:55:23,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.316666666666666) internal successors, (259), 60 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-12-06 22:55:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 22:55:23,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:23,777 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:23,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 22:55:23,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 22:55:23,978 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:23,979 INFO L85 PathProgramCache]: Analyzing trace with hash 906544930, now seen corresponding path program 6 times [2021-12-06 22:55:23,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:23,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929514420] [2021-12-06 22:55:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:23,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 14 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:55:24,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:24,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929514420] [2021-12-06 22:55:24,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929514420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:24,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218034030] [2021-12-06 22:55:24,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:55:24,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:24,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:24,871 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:24,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 22:55:25,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 22:55:25,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:55:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:25,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:55:25,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:25,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:55:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:55:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 14 proven. 259 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:25,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:26,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1067 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1067) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-12-06 22:55:26,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:26,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:55:26,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:26,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:55:26,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:55:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 14 proven. 259 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:55:26,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218034030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:26,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:26,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24, 24] total 50 [2021-12-06 22:55:26,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082963051] [2021-12-06 22:55:26,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:26,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 22:55:26,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 22:55:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2229, Unknown=1, NotChecked=94, Total=2450 [2021-12-06 22:55:26,311 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:28,104 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2021-12-06 22:55:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 22:55:28,105 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 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 117 [2021-12-06 22:55:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:28,106 INFO L225 Difference]: With dead ends: 220 [2021-12-06 22:55:28,106 INFO L226 Difference]: Without dead ends: 220 [2021-12-06 22:55:28,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=403, Invalid=5920, Unknown=1, NotChecked=156, Total=6480 [2021-12-06 22:55:28,107 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 165 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:28,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1314 Invalid, 2596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2432 Invalid, 0 Unknown, 124 Unchecked, 0.8s Time] [2021-12-06 22:55:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-06 22:55:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 212. [2021-12-06 22:55:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.0334928229665072) internal successors, (216), 211 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2021-12-06 22:55:28,110 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 117 [2021-12-06 22:55:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:28,110 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2021-12-06 22:55:28,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2021-12-06 22:55:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 22:55:28,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:28,111 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:28,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 22:55:28,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 22:55:28,312 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash -679998801, now seen corresponding path program 1 times [2021-12-06 22:55:28,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752563076] [2021-12-06 22:55:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:28,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 28 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:55:28,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752563076] [2021-12-06 22:55:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752563076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816608388] [2021-12-06 22:55:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:28,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:28,885 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:28,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 22:55:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:28,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 22:55:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:29,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:29,428 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:55:29,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 22:55:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 28 proven. 213 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:55:29,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:29,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 22:55:29,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 22:55:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 28 proven. 213 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:55:29,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816608388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:29,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:29,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 25] total 53 [2021-12-06 22:55:29,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255726559] [2021-12-06 22:55:29,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:29,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 22:55:29,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:29,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 22:55:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2590, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 22:55:29,726 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 53 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:31,141 INFO L93 Difference]: Finished difference Result 330 states and 334 transitions. [2021-12-06 22:55:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 22:55:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 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 119 [2021-12-06 22:55:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:31,142 INFO L225 Difference]: With dead ends: 330 [2021-12-06 22:55:31,142 INFO L226 Difference]: Without dead ends: 226 [2021-12-06 22:55:31,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 214 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=578, Invalid=6064, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 22:55:31,143 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 354 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:31,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1239 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2311 Invalid, 0 Unknown, 151 Unchecked, 0.6s Time] [2021-12-06 22:55:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-06 22:55:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 220. [2021-12-06 22:55:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 217 states have (on average 1.032258064516129) internal successors, (224), 219 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2021-12-06 22:55:31,146 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 119 [2021-12-06 22:55:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:31,146 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2021-12-06 22:55:31,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2021-12-06 22:55:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 22:55:31,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:31,147 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:31,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 22:55:31,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 22:55:31,348 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1591845326, now seen corresponding path program 2 times [2021-12-06 22:55:31,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:31,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000099109] [2021-12-06 22:55:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:31,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 45 proven. 221 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:55:31,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000099109] [2021-12-06 22:55:31,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000099109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642052882] [2021-12-06 22:55:31,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:55:31,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:31,541 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:31,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 22:55:31,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:55:31,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:31,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 22:55:31,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 66 proven. 200 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:55:31,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:32,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 22:55:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 66 proven. 200 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:55:32,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642052882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:32,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:32,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2021-12-06 22:55:32,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354241244] [2021-12-06 22:55:32,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:32,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:55:32,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:55:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:55:32,570 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 48 states, 47 states have (on average 5.1063829787234045) internal successors, (240), 48 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:33,293 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2021-12-06 22:55:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 22:55:33,294 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.1063829787234045) internal successors, (240), 48 states have internal predecessors, (240), 0 states have call successors, (0), 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 123 [2021-12-06 22:55:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:33,294 INFO L225 Difference]: With dead ends: 230 [2021-12-06 22:55:33,294 INFO L226 Difference]: Without dead ends: 141 [2021-12-06 22:55:33,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=819, Invalid=3213, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 22:55:33,295 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 742 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:33,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 718 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:55:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-06 22:55:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2021-12-06 22:55:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 136 states have (on average 1.036764705882353) internal successors, (141), 138 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2021-12-06 22:55:33,297 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 123 [2021-12-06 22:55:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:33,297 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2021-12-06 22:55:33,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.1063829787234045) internal successors, (240), 48 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2021-12-06 22:55:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 22:55:33,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:33,298 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:33,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 22:55:33,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 22:55:33,499 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash 500143922, now seen corresponding path program 12 times [2021-12-06 22:55:33,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:33,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250928026] [2021-12-06 22:55:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:33,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 66 proven. 258 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:55:33,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:33,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250928026] [2021-12-06 22:55:33,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250928026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:33,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642183521] [2021-12-06 22:55:33,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:55:33,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:33,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:33,711 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:33,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 22:55:34,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 22:55:34,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:34,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 22:55:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 91 proven. 233 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:55:34,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:35,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:55:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 120 proven. 204 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:55:35,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642183521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:35,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:35,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 51 [2021-12-06 22:55:35,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433272573] [2021-12-06 22:55:35,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:35,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 22:55:35,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 22:55:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2279, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:55:35,464 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 52 states, 51 states have (on average 5.235294117647059) internal successors, (267), 52 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:35,918 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2021-12-06 22:55:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:55:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.235294117647059) internal successors, (267), 52 states have internal predecessors, (267), 0 states have call successors, (0), 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 128 [2021-12-06 22:55:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:35,920 INFO L225 Difference]: With dead ends: 154 [2021-12-06 22:55:35,920 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 22:55:35,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=3252, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 22:55:35,921 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 802 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:35,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 489 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:55:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 22:55:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2021-12-06 22:55:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-12-06 22:55:35,923 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 128 [2021-12-06 22:55:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:35,923 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-12-06 22:55:35,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.235294117647059) internal successors, (267), 52 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-12-06 22:55:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 22:55:35,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:35,924 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:35,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 22:55:36,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:36,125 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:36,126 INFO L85 PathProgramCache]: Analyzing trace with hash -252767432, now seen corresponding path program 7 times [2021-12-06 22:55:36,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:36,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382232873] [2021-12-06 22:55:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:36,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 16 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:55:37,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382232873] [2021-12-06 22:55:37,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382232873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580205435] [2021-12-06 22:55:37,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:55:37,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:37,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:37,230 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:37,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 22:55:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 22:55:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:37,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:38,610 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-06 22:55:38,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-06 22:55:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 40 proven. 287 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:55:38,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:39,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:55:39,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:55:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 40 proven. 287 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:55:39,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580205435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:39,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:39,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 27, 27] total 76 [2021-12-06 22:55:39,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075672077] [2021-12-06 22:55:39,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:39,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 22:55:39,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 22:55:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5482, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 22:55:39,982 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 76 states, 76 states have (on average 3.8421052631578947) internal successors, (292), 76 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:43,376 INFO L93 Difference]: Finished difference Result 314 states and 318 transitions. [2021-12-06 22:55:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 22:55:43,376 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.8421052631578947) internal successors, (292), 76 states have internal predecessors, (292), 0 states have call successors, (0), 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 132 [2021-12-06 22:55:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:43,377 INFO L225 Difference]: With dead ends: 314 [2021-12-06 22:55:43,377 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 22:55:43,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 222 SyntacticMatches, 10 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 2782 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=627, Invalid=14379, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 22:55:43,378 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 171 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 820 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:43,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 2247 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2360 Invalid, 0 Unknown, 820 Unchecked, 0.8s Time] [2021-12-06 22:55:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 22:55:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 146. [2021-12-06 22:55:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.034965034965035) internal successors, (148), 145 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2021-12-06 22:55:43,381 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 132 [2021-12-06 22:55:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:43,381 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2021-12-06 22:55:43,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.8421052631578947) internal successors, (292), 76 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2021-12-06 22:55:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 22:55:43,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:43,382 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:43,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 22:55:43,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 22:55:43,582 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1652436117, now seen corresponding path program 8 times [2021-12-06 22:55:43,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:43,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510817724] [2021-12-06 22:55:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:43,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 66 proven. 290 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:55:43,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:43,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510817724] [2021-12-06 22:55:43,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510817724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:43,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302016358] [2021-12-06 22:55:43,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:55:43,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:43,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:43,787 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:43,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 22:55:43,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:55:43,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 22:55:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 91 proven. 265 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:55:44,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:44,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:55:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 91 proven. 265 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:55:44,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302016358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:44,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:44,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2021-12-06 22:55:44,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570822628] [2021-12-06 22:55:44,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:44,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:55:44,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:55:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 22:55:44,561 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 44 states, 43 states have (on average 5.1395348837209305) internal successors, (221), 44 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:45,171 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-12-06 22:55:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:55:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 5.1395348837209305) internal successors, (221), 44 states have internal predecessors, (221), 0 states have call successors, (0), 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 136 [2021-12-06 22:55:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:45,172 INFO L225 Difference]: With dead ends: 156 [2021-12-06 22:55:45,172 INFO L226 Difference]: Without dead ends: 152 [2021-12-06 22:55:45,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=702, Invalid=3080, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 22:55:45,172 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 868 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:45,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 666 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:55:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-06 22:55:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-12-06 22:55:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 147 states have (on average 1.034013605442177) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-12-06 22:55:45,175 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 136 [2021-12-06 22:55:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:45,175 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-12-06 22:55:45,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 5.1395348837209305) internal successors, (221), 44 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-12-06 22:55:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 22:55:45,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:45,176 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:45,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-06 22:55:45,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 22:55:45,377 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1190770075, now seen corresponding path program 13 times [2021-12-06 22:55:45,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:45,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724251769] [2021-12-06 22:55:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:45,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:55:45,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:45,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724251769] [2021-12-06 22:55:45,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724251769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:45,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327565039] [2021-12-06 22:55:45,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:55:45,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:45,697 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:45,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 22:55:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 22:55:45,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:46,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:47,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:55:47,744 INFO L354 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2021-12-06 22:55:47,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-06 22:55:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:55:47,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:48,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:48,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:55:48,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:55:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:55:49,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327565039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:49,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:49,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 31] total 80 [2021-12-06 22:55:49,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032100669] [2021-12-06 22:55:49,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:49,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 22:55:49,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:49,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 22:55:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=6088, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 22:55:49,402 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 80 states, 80 states have (on average 3.95) internal successors, (316), 80 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:52,051 INFO L93 Difference]: Finished difference Result 395 states and 398 transitions. [2021-12-06 22:55:52,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 22:55:52,051 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.95) internal successors, (316), 80 states have internal predecessors, (316), 0 states have call successors, (0), 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 139 [2021-12-06 22:55:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:52,052 INFO L225 Difference]: With dead ends: 395 [2021-12-06 22:55:52,052 INFO L226 Difference]: Without dead ends: 164 [2021-12-06 22:55:52,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3288 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=734, Invalid=18172, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 22:55:52,053 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 201 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 3684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1328 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:52,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 2404 Invalid, 3684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2290 Invalid, 0 Unknown, 1328 Unchecked, 0.6s Time] [2021-12-06 22:55:52,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-06 22:55:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2021-12-06 22:55:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 155 states have (on average 1.032258064516129) internal successors, (160), 157 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2021-12-06 22:55:52,055 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 139 [2021-12-06 22:55:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:52,055 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2021-12-06 22:55:52,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.95) internal successors, (316), 80 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2021-12-06 22:55:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 22:55:52,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:52,056 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:52,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 22:55:52,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:52,257 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2139702699, now seen corresponding path program 14 times [2021-12-06 22:55:52,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:52,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820949636] [2021-12-06 22:55:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:52,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:55:52,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820949636] [2021-12-06 22:55:52,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820949636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737363724] [2021-12-06 22:55:52,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:55:52,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:52,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:52,527 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:52,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 22:55:52,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:55:52,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 22:55:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:55:52,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:53,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:55:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:55:53,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737363724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:53,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:53,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2021-12-06 22:55:53,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819069278] [2021-12-06 22:55:53,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:53,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:55:53,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:55:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:55:53,354 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 48 states, 47 states have (on average 5.0212765957446805) internal successors, (236), 48 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:53,877 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2021-12-06 22:55:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 22:55:53,877 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.0212765957446805) internal successors, (236), 48 states have internal predecessors, (236), 0 states have call successors, (0), 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 147 [2021-12-06 22:55:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:53,878 INFO L225 Difference]: With dead ends: 173 [2021-12-06 22:55:53,878 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 22:55:53,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=690, Invalid=2970, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 22:55:53,878 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 527 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:53,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 822 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:55:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 22:55:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2021-12-06 22:55:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2021-12-06 22:55:53,880 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 147 [2021-12-06 22:55:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:53,881 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2021-12-06 22:55:53,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.0212765957446805) internal successors, (236), 48 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2021-12-06 22:55:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 22:55:53,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:53,881 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:53,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-06 22:55:54,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 22:55:54,083 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:54,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1758125361, now seen corresponding path program 9 times [2021-12-06 22:55:54,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224073712] [2021-12-06 22:55:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:54,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:55:54,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224073712] [2021-12-06 22:55:54,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224073712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139301518] [2021-12-06 22:55:54,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:55:54,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:54,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:54,350 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:54,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 22:55:55,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 22:55:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 22:55:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:55:55,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:56,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:55:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:55:56,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139301518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:56,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:56,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 56 [2021-12-06 22:55:56,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261477141] [2021-12-06 22:55:56,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:56,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 22:55:56,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 22:55:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2761, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 22:55:56,138 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 57 states, 56 states have (on average 5.428571428571429) internal successors, (304), 57 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:56,793 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2021-12-06 22:55:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 22:55:56,793 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.428571428571429) internal successors, (304), 57 states have internal predecessors, (304), 0 states have call successors, (0), 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 151 [2021-12-06 22:55:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:56,794 INFO L225 Difference]: With dead ends: 171 [2021-12-06 22:55:56,794 INFO L226 Difference]: Without dead ends: 167 [2021-12-06 22:55:56,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=4746, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 22:55:56,795 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1007 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:56,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 592 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:55:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-06 22:55:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-12-06 22:55:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2021-12-06 22:55:56,797 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 151 [2021-12-06 22:55:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:56,797 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2021-12-06 22:55:56,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.428571428571429) internal successors, (304), 57 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2021-12-06 22:55:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 22:55:56,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:56,798 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:56,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 22:55:56,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 22:55:56,999 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:55:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash -813530039, now seen corresponding path program 15 times [2021-12-06 22:55:57,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:57,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197400658] [2021-12-06 22:55:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:57,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 46 proven. 432 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:55:57,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:57,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197400658] [2021-12-06 22:55:57,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197400658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:57,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760792457] [2021-12-06 22:55:57,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:55:57,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:57,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:57,357 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:57,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 22:55:58,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 22:55:58,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 22:55:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:58,341 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:55:58,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:55:58,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:55:58,860 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-12-06 22:55:58,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 22:55:59,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:55:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 22:55:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2021-12-06 22:55:59,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:00,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-12-06 22:56:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-12-06 22:56:02,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760792457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:02,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:02,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11, 12] total 48 [2021-12-06 22:56:02,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853407730] [2021-12-06 22:56:02,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:02,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:56:02,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:02,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:56:02,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2116, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:56:02,649 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 48 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 48 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:05,222 INFO L93 Difference]: Finished difference Result 278 states and 281 transitions. [2021-12-06 22:56:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 22:56:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 48 states have internal predecessors, (185), 0 states have call successors, (0), 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 154 [2021-12-06 22:56:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:05,223 INFO L225 Difference]: With dead ends: 278 [2021-12-06 22:56:05,223 INFO L226 Difference]: Without dead ends: 171 [2021-12-06 22:56:05,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1245, Invalid=13517, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 22:56:05,224 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:05,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 844 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2015 Invalid, 0 Unknown, 198 Unchecked, 0.5s Time] [2021-12-06 22:56:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-06 22:56:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-12-06 22:56:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 167 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-12-06 22:56:05,226 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 154 [2021-12-06 22:56:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:05,226 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-12-06 22:56:05,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.8541666666666665) internal successors, (185), 48 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-12-06 22:56:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-06 22:56:05,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:05,227 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:05,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 22:56:05,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:05,428 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:56:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:05,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1174857516, now seen corresponding path program 10 times [2021-12-06 22:56:05,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:05,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571009439] [2021-12-06 22:56:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:05,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 50 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:56:06,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571009439] [2021-12-06 22:56:06,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571009439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198728829] [2021-12-06 22:56:06,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:56:06,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:06,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:06,196 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:06,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 22:56:06,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:56:06,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:56:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 22:56:06,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:06,321 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:56:06,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:56:06,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:56:07,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:56:07,854 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:56:07,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-12-06 22:56:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 347 proven. 171 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:56:07,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:09,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:56:09,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 22:56:09,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 22:56:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 262 proven. 256 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:56:10,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198728829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:10,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:10,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32, 32] total 99 [2021-12-06 22:56:10,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077435587] [2021-12-06 22:56:10,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:10,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 22:56:10,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:10,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 22:56:10,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=9014, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 22:56:10,887 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:13,503 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2021-12-06 22:56:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 22:56:13,503 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 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 162 [2021-12-06 22:56:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:13,504 INFO L225 Difference]: With dead ends: 251 [2021-12-06 22:56:13,504 INFO L226 Difference]: Without dead ends: 178 [2021-12-06 22:56:13,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5951 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1619, Invalid=20731, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 22:56:13,506 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 249 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 2732 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 543 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:13,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 2332 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2732 Invalid, 0 Unknown, 543 Unchecked, 0.8s Time] [2021-12-06 22:56:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-06 22:56:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2021-12-06 22:56:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 171 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2021-12-06 22:56:13,508 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 162 [2021-12-06 22:56:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:13,508 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2021-12-06 22:56:13,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2021-12-06 22:56:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 22:56:13,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:13,509 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:13,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 22:56:13,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:13,710 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:56:13,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -664420407, now seen corresponding path program 11 times [2021-12-06 22:56:13,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:13,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650092372] [2021-12-06 22:56:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:13,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 120 proven. 435 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:56:14,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:14,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650092372] [2021-12-06 22:56:14,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650092372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:14,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565075407] [2021-12-06 22:56:14,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:56:14,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:14,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:14,022 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:14,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 22:56:14,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 22:56:14,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:56:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 22:56:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:14,596 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:56:14,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:56:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 153 proven. 402 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:56:15,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 190 proven. 365 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:56:16,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565075407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:16,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:16,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 69 [2021-12-06 22:56:16,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309314280] [2021-12-06 22:56:16,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:16,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 22:56:16,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:16,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 22:56:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=4180, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 22:56:16,179 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 70 states, 69 states have (on average 5.434782608695652) internal successors, (375), 70 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:16,777 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2021-12-06 22:56:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:56:16,777 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 5.434782608695652) internal successors, (375), 70 states have internal predecessors, (375), 0 states have call successors, (0), 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 166 [2021-12-06 22:56:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:16,778 INFO L225 Difference]: With dead ends: 185 [2021-12-06 22:56:16,778 INFO L226 Difference]: Without dead ends: 181 [2021-12-06 22:56:16,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1242, Invalid=5564, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 22:56:16,779 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 567 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:16,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1026 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:56:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-06 22:56:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-12-06 22:56:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.0225988700564972) internal successors, (181), 178 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2021-12-06 22:56:16,781 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 166 [2021-12-06 22:56:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:16,781 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2021-12-06 22:56:16,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 5.434782608695652) internal successors, (375), 70 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:16,781 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2021-12-06 22:56:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-06 22:56:16,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:16,782 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:16,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 22:56:16,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 22:56:16,983 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:56:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1390600393, now seen corresponding path program 12 times [2021-12-06 22:56:16,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:16,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151903699] [2021-12-06 22:56:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:16,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 369 proven. 261 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:56:17,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151903699] [2021-12-06 22:56:17,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151903699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301736322] [2021-12-06 22:56:17,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:56:17,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:17,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:17,276 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:17,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 22:56:19,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 22:56:19,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:56:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 22:56:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:19,450 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:56:19,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:56:19,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:56:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 312 proven. 318 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:56:20,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 440 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:56:20,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301736322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:20,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:20,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 64 [2021-12-06 22:56:20,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872009665] [2021-12-06 22:56:20,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:20,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 22:56:20,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 22:56:20,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=3371, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 22:56:20,884 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 64 states, 64 states have (on average 5.0625) internal successors, (324), 64 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:21,578 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2021-12-06 22:56:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:56:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 5.0625) internal successors, (324), 64 states have internal predecessors, (324), 0 states have call successors, (0), 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 173 [2021-12-06 22:56:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:21,579 INFO L225 Difference]: With dead ends: 309 [2021-12-06 22:56:21,579 INFO L226 Difference]: Without dead ends: 186 [2021-12-06 22:56:21,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1420, Invalid=6236, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 22:56:21,580 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 213 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:21,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 516 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:56:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-06 22:56:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2021-12-06 22:56:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.022099447513812) internal successors, (185), 182 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-12-06 22:56:21,583 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 173 [2021-12-06 22:56:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:21,583 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-12-06 22:56:21,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.0625) internal successors, (324), 64 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-12-06 22:56:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-06 22:56:21,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:21,584 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:21,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 22:56:21,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:21,785 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:56:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2147364666, now seen corresponding path program 13 times [2021-12-06 22:56:21,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:21,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265152349] [2021-12-06 22:56:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:21,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 22 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:56:22,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265152349] [2021-12-06 22:56:22,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265152349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457211992] [2021-12-06 22:56:22,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:56:22,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:22,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:22,926 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:22,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 22:56:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 22:56:23,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:23,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:56:24,968 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 22:56:24,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-06 22:56:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 55 proven. 575 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:56:25,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:26,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:56:26,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:56:26,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:56:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 55 proven. 575 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:56:26,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457211992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:26,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:26,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 33, 33] total 93 [2021-12-06 22:56:26,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911099595] [2021-12-06 22:56:26,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:26,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-06 22:56:26,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:26,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-06 22:56:26,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=8306, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 22:56:26,908 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 93 states, 93 states have (on average 4.204301075268817) internal successors, (391), 93 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:32,838 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2021-12-06 22:56:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-06 22:56:32,838 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 4.204301075268817) internal successors, (391), 93 states have internal predecessors, (391), 0 states have call successors, (0), 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 177 [2021-12-06 22:56:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:32,839 INFO L225 Difference]: With dead ends: 409 [2021-12-06 22:56:32,839 INFO L226 Difference]: Without dead ends: 249 [2021-12-06 22:56:32,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 304 SyntacticMatches, 13 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 5116 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=834, Invalid=24926, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 22:56:32,840 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 245 mSDsluCounter, 3884 mSDsCounter, 0 mSdLazyCounter, 4146 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 3946 SdHoareTripleChecker+Invalid, 5548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1276 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:32,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 3946 Invalid, 5548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 4146 Invalid, 0 Unknown, 1276 Unchecked, 1.3s Time] [2021-12-06 22:56:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-06 22:56:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 187. [2021-12-06 22:56:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.0216216216216216) internal successors, (189), 186 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2021-12-06 22:56:32,843 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 177 [2021-12-06 22:56:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:32,843 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2021-12-06 22:56:32,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 4.204301075268817) internal successors, (391), 93 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2021-12-06 22:56:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-06 22:56:32,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:32,844 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:32,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 22:56:33,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:33,046 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:56:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1954739971, now seen corresponding path program 14 times [2021-12-06 22:56:33,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406575440] [2021-12-06 22:56:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:33,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 153 proven. 518 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:56:33,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:33,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406575440] [2021-12-06 22:56:33,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406575440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:33,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899667192] [2021-12-06 22:56:33,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:56:33,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:33,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:33,362 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:33,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 22:56:33,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:56:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:56:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:56:33,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 190 proven. 481 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:56:34,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:34,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 22:56:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 190 proven. 481 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:56:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899667192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:34,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:34,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 67 [2021-12-06 22:56:34,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255693078] [2021-12-06 22:56:34,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:34,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 22:56:34,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 22:56:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=4038, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:56:34,907 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 68 states, 67 states have (on average 5.074626865671642) internal successors, (340), 68 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:36,014 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2021-12-06 22:56:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:56:36,015 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 5.074626865671642) internal successors, (340), 68 states have internal predecessors, (340), 0 states have call successors, (0), 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 181 [2021-12-06 22:56:36,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:36,015 INFO L225 Difference]: With dead ends: 200 [2021-12-06 22:56:36,015 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 22:56:36,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1643, Invalid=6729, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 22:56:36,016 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 883 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:36,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 1159 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:56:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 22:56:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2021-12-06 22:56:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 193 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2021-12-06 22:56:36,018 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 181 [2021-12-06 22:56:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:36,019 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2021-12-06 22:56:36,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 5.074626865671642) internal successors, (340), 68 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2021-12-06 22:56:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 22:56:36,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:36,020 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:36,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-06 22:56:36,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 22:56:36,221 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:56:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash -240200829, now seen corresponding path program 15 times [2021-12-06 22:56:36,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763473688] [2021-12-06 22:56:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:36,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 444 proven. 309 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:56:36,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:36,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763473688] [2021-12-06 22:56:36,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763473688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:36,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152591870] [2021-12-06 22:56:36,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:56:36,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:36,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:36,575 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:36,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 22:56:38,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 22:56:38,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:56:38,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:56:38,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:38,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:56:38,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:56:38,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:56:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 522 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:56:39,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 522 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:56:40,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152591870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:40,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:40,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 69 [2021-12-06 22:56:40,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090926002] [2021-12-06 22:56:40,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:40,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 22:56:40,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 22:56:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=3822, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 22:56:40,338 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand has 69 states, 69 states have (on average 5.072463768115942) internal successors, (350), 69 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:40,709 INFO L93 Difference]: Finished difference Result 335 states and 338 transitions. [2021-12-06 22:56:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:56:40,709 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 5.072463768115942) internal successors, (350), 69 states have internal predecessors, (350), 0 states have call successors, (0), 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 188 [2021-12-06 22:56:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:40,710 INFO L225 Difference]: With dead ends: 335 [2021-12-06 22:56:40,710 INFO L226 Difference]: Without dead ends: 201 [2021-12-06 22:56:40,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1412, Invalid=5394, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 22:56:40,711 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 224 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:40,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 418 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:56:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-06 22:56:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2021-12-06 22:56:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 197 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2021-12-06 22:56:40,713 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 188 [2021-12-06 22:56:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:40,713 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2021-12-06 22:56:40,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 5.072463768115942) internal successors, (350), 69 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:40,714 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2021-12-06 22:56:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-06 22:56:40,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:40,714 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:40,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 22:56:40,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:40,916 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:56:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:40,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1555997408, now seen corresponding path program 16 times [2021-12-06 22:56:40,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:40,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20269596] [2021-12-06 22:56:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:40,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 24 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:56:42,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:42,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20269596] [2021-12-06 22:56:42,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20269596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:42,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584915973] [2021-12-06 22:56:42,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:56:42,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:42,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:42,728 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:42,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 22:56:42,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:56:42,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:56:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 22:56:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:42,878 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:56:42,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:56:43,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:56:45,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:56:45,203 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:56:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-12-06 22:56:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 500 proven. 253 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:56:45,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:47,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:56:47,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 22:56:47,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 22:56:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 395 proven. 358 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:56:49,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584915973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:49,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:49,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 36, 36] total 114 [2021-12-06 22:56:49,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586448760] [2021-12-06 22:56:49,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:49,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-06 22:56:49,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-06 22:56:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=848, Invalid=12034, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 22:56:49,451 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 114 states, 114 states have (on average 4.140350877192983) internal successors, (472), 114 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:54,625 INFO L93 Difference]: Finished difference Result 442 states and 446 transitions. [2021-12-06 22:56:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 22:56:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 4.140350877192983) internal successors, (472), 114 states have internal predecessors, (472), 0 states have call successors, (0), 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 192 [2021-12-06 22:56:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:54,627 INFO L225 Difference]: With dead ends: 442 [2021-12-06 22:56:54,627 INFO L226 Difference]: Without dead ends: 268 [2021-12-06 22:56:54,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5977 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2041, Invalid=27715, Unknown=0, NotChecked=0, Total=29756 [2021-12-06 22:56:54,629 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 334 mSDsluCounter, 3848 mSDsCounter, 0 mSdLazyCounter, 4453 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 3915 SdHoareTripleChecker+Invalid, 5196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 4453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:54,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 3915 Invalid, 5196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 4453 Invalid, 0 Unknown, 612 Unchecked, 1.6s Time] [2021-12-06 22:56:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-06 22:56:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 202. [2021-12-06 22:56:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.02) internal successors, (204), 201 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2021-12-06 22:56:54,633 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 192 [2021-12-06 22:56:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:54,633 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2021-12-06 22:56:54,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 4.140350877192983) internal successors, (472), 114 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2021-12-06 22:56:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-06 22:56:54,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:54,635 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:54,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 22:56:54,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:54,836 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:56:54,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 146392317, now seen corresponding path program 17 times [2021-12-06 22:56:54,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:54,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677339198] [2021-12-06 22:56:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:54,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 190 proven. 608 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:56:55,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677339198] [2021-12-06 22:56:55,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677339198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019030495] [2021-12-06 22:56:55,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:56:55,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:55,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:55,218 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:55,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 22:56:57,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-06 22:56:57,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:56:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 22:56:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:57,073 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:56:57,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:56:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 231 proven. 567 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:56:57,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:56:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 276 proven. 522 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:56:59,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019030495] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:56:59,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:56:59,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 81 [2021-12-06 22:56:59,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376727702] [2021-12-06 22:56:59,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:56:59,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 22:56:59,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:59,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 22:56:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=5772, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 22:56:59,092 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 82 states, 81 states have (on average 5.444444444444445) internal successors, (441), 82 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:59,839 INFO L93 Difference]: Finished difference Result 215 states and 217 transitions. [2021-12-06 22:56:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 22:56:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 5.444444444444445) internal successors, (441), 82 states have internal predecessors, (441), 0 states have call successors, (0), 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 196 [2021-12-06 22:56:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:59,840 INFO L225 Difference]: With dead ends: 215 [2021-12-06 22:56:59,840 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 22:56:59,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1659, Invalid=7653, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 22:56:59,841 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 747 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:59,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1357 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:56:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 22:56:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2021-12-06 22:56:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 208 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2021-12-06 22:56:59,844 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 196 [2021-12-06 22:56:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:59,844 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2021-12-06 22:56:59,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 5.444444444444445) internal successors, (441), 82 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2021-12-06 22:56:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-06 22:56:59,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:59,846 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:59,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 22:57:00,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:00,047 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:57:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1243179133, now seen corresponding path program 18 times [2021-12-06 22:57:00,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159663649] [2021-12-06 22:57:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:00,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 526 proven. 361 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:57:00,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159663649] [2021-12-06 22:57:00,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159663649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:57:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456422116] [2021-12-06 22:57:00,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:57:00,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:00,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:57:00,458 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:57:00,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 22:57:06,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-06 22:57:06,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:57:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 155 conjunts are in the unsatisfiable core [2021-12-06 22:57:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:57:06,322 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:57:06,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:57:06,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:57:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 52 proven. 1111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:57:08,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:57:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:57:12,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456422116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:57:12,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:57:12,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 46, 45] total 118 [2021-12-06 22:57:12,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950864141] [2021-12-06 22:57:12,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:57:12,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-12-06 22:57:12,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:12,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-12-06 22:57:12,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1748, Invalid=12058, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 22:57:12,294 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 118 states, 118 states have (on average 4.686440677966102) internal successors, (553), 118 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:57:17,602 INFO L93 Difference]: Finished difference Result 463 states and 466 transitions. [2021-12-06 22:57:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 22:57:17,603 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 4.686440677966102) internal successors, (553), 118 states have internal predecessors, (553), 0 states have call successors, (0), 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 203 [2021-12-06 22:57:17,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:57:17,604 INFO L225 Difference]: With dead ends: 463 [2021-12-06 22:57:17,604 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 22:57:17,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10736 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=6277, Invalid=33923, Unknown=0, NotChecked=0, Total=40200 [2021-12-06 22:57:17,605 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 782 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:57:17,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 1653 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2408 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 22:57:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 22:57:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2021-12-06 22:57:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 211 states have (on average 1.018957345971564) internal successors, (215), 212 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2021-12-06 22:57:17,608 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 203 [2021-12-06 22:57:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:57:17,608 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2021-12-06 22:57:17,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 4.686440677966102) internal successors, (553), 118 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2021-12-06 22:57:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-06 22:57:17,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:57:17,609 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:57:17,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 22:57:17,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:17,810 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:57:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash -733609914, now seen corresponding path program 19 times [2021-12-06 22:57:17,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:17,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660830229] [2021-12-06 22:57:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:17,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 65 proven. 1147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:57:18,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:18,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660830229] [2021-12-06 22:57:18,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660830229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:57:18,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062367230] [2021-12-06 22:57:18,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:57:18,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:18,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:57:18,919 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:57:18,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 22:57:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:19,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 22:57:19,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:57:19,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:57:19,997 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:57:19,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 22:57:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 65 proven. 822 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:57:20,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:57:20,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 22:57:20,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 22:57:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 65 proven. 822 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:57:20,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062367230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:57:20,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:57:20,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 37, 37] total 77 [2021-12-06 22:57:20,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406623954] [2021-12-06 22:57:20,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:57:20,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 22:57:20,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 22:57:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=5620, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 22:57:20,497 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 77 states, 77 states have (on average 3.8181818181818183) internal successors, (294), 77 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:57:24,241 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2021-12-06 22:57:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 22:57:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.8181818181818183) internal successors, (294), 77 states have internal predecessors, (294), 0 states have call successors, (0), 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 207 [2021-12-06 22:57:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:57:24,243 INFO L225 Difference]: With dead ends: 317 [2021-12-06 22:57:24,243 INFO L226 Difference]: Without dead ends: 223 [2021-12-06 22:57:24,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 384 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2621 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1038, Invalid=14214, Unknown=0, NotChecked=0, Total=15252 [2021-12-06 22:57:24,244 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 713 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 7387 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 3467 SdHoareTripleChecker+Invalid, 7532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 7387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:57:24,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 3467 Invalid, 7532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 7387 Invalid, 0 Unknown, 1 Unchecked, 1.8s Time] [2021-12-06 22:57:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-06 22:57:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 217. [2021-12-06 22:57:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 216 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-12-06 22:57:24,246 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 207 [2021-12-06 22:57:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:57:24,246 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-12-06 22:57:24,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.8181818181818183) internal successors, (294), 77 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-12-06 22:57:24,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-06 22:57:24,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:57:24,247 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:57:24,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 22:57:24,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 22:57:24,448 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:57:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1853547209, now seen corresponding path program 20 times [2021-12-06 22:57:24,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:24,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094086327] [2021-12-06 22:57:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:24,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 231 proven. 705 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:57:24,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:24,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094086327] [2021-12-06 22:57:24,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094086327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:57:24,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50536683] [2021-12-06 22:57:24,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:57:24,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:57:24,855 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:57:24,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 22:57:25,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:57:25,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:57:25,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 22:57:25,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:57:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 276 proven. 660 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:57:25,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:57:26,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:57:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 276 proven. 660 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:57:26,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50536683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:57:26,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:57:26,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 64 [2021-12-06 22:57:26,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949501751] [2021-12-06 22:57:26,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:57:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 22:57:26,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 22:57:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=3650, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 22:57:26,125 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 65 states, 64 states have (on average 5.171875) internal successors, (331), 65 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:57:27,040 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2021-12-06 22:57:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 22:57:27,041 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 5.171875) internal successors, (331), 65 states have internal predecessors, (331), 0 states have call successors, (0), 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 211 [2021-12-06 22:57:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:57:27,042 INFO L225 Difference]: With dead ends: 230 [2021-12-06 22:57:27,042 INFO L226 Difference]: Without dead ends: 226 [2021-12-06 22:57:27,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 386 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1190, Invalid=5290, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 22:57:27,042 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 889 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:57:27,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1363 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:57:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-06 22:57:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2021-12-06 22:57:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 222 states have (on average 1.018018018018018) internal successors, (226), 223 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2021-12-06 22:57:27,047 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 211 [2021-12-06 22:57:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:57:27,047 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2021-12-06 22:57:27,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 5.171875) internal successors, (331), 65 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2021-12-06 22:57:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 22:57:27,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:57:27,049 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:57:27,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 22:57:27,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 22:57:27,249 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:57:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash -829776841, now seen corresponding path program 21 times [2021-12-06 22:57:27,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:27,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646696038] [2021-12-06 22:57:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:27,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 615 proven. 417 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:57:27,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:27,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646696038] [2021-12-06 22:57:27,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646696038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:57:27,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469600112] [2021-12-06 22:57:27,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:57:27,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:27,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:57:27,636 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:57:27,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 22:57:34,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-06 22:57:34,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:57:34,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 22:57:34,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:57:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:57:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:57:34,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:57:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 707 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:57:35,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:57:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 707 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:57:36,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469600112] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:57:36,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:57:36,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 79 [2021-12-06 22:57:36,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315123380] [2021-12-06 22:57:36,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:57:36,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 22:57:36,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 22:57:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=5025, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 22:57:36,611 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 79 states, 79 states have (on average 5.0886075949367084) internal successors, (402), 79 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:37,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:57:37,189 INFO L93 Difference]: Finished difference Result 387 states and 390 transitions. [2021-12-06 22:57:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 22:57:37,189 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 5.0886075949367084) internal successors, (402), 79 states have internal predecessors, (402), 0 states have call successors, (0), 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 218 [2021-12-06 22:57:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:57:37,190 INFO L225 Difference]: With dead ends: 387 [2021-12-06 22:57:37,190 INFO L226 Difference]: Without dead ends: 231 [2021-12-06 22:57:37,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1836, Invalid=7094, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 22:57:37,191 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 176 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:57:37,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 732 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:57:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-06 22:57:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2021-12-06 22:57:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 227 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2021-12-06 22:57:37,194 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 218 [2021-12-06 22:57:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:57:37,194 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2021-12-06 22:57:37,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 5.0886075949367084) internal successors, (402), 79 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2021-12-06 22:57:37,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-06 22:57:37,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:57:37,195 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:57:37,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 22:57:37,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 22:57:37,396 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:57:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1519006996, now seen corresponding path program 22 times [2021-12-06 22:57:37,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100493862] [2021-12-06 22:57:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:37,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 70 proven. 1340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:57:38,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:38,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100493862] [2021-12-06 22:57:38,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100493862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:57:38,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411727985] [2021-12-06 22:57:38,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:57:38,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:38,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:57:38,592 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:57:38,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 22:57:38,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:57:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:57:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 22:57:38,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:57:38,773 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:57:38,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:57:39,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:57:41,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:57:41,232 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:57:41,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-12-06 22:57:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 681 proven. 351 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:57:41,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:57:43,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:57:43,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 22:57:43,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 22:57:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 556 proven. 476 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:57:45,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411727985] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:57:45,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:57:45,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 40, 40] total 127 [2021-12-06 22:57:45,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634813717] [2021-12-06 22:57:45,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:57:45,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-06 22:57:45,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-06 22:57:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=14911, Unknown=0, NotChecked=0, Total=16002 [2021-12-06 22:57:45,592 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand has 127 states, 127 states have (on average 4.25984251968504) internal successors, (541), 127 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:57:49,891 INFO L93 Difference]: Finished difference Result 339 states and 341 transitions. [2021-12-06 22:57:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 22:57:49,892 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 4.25984251968504) internal successors, (541), 127 states have internal predecessors, (541), 0 states have call successors, (0), 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 222 [2021-12-06 22:57:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:57:49,893 INFO L225 Difference]: With dead ends: 339 [2021-12-06 22:57:49,893 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 22:57:49,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 407 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9903 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2515, Invalid=34927, Unknown=0, NotChecked=0, Total=37442 [2021-12-06 22:57:49,894 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 297 mSDsluCounter, 3712 mSDsCounter, 0 mSdLazyCounter, 4773 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 3790 SdHoareTripleChecker+Invalid, 5673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 4773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 787 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:57:49,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 3790 Invalid, 5673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4773 Invalid, 0 Unknown, 787 Unchecked, 1.3s Time] [2021-12-06 22:57:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 22:57:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2021-12-06 22:57:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 230 states have (on average 1.017391304347826) internal successors, (234), 231 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2021-12-06 22:57:49,897 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 222 [2021-12-06 22:57:49,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:57:49,897 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2021-12-06 22:57:49,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 4.25984251968504) internal successors, (541), 127 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:49,897 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2021-12-06 22:57:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-06 22:57:49,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:57:49,898 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:57:49,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-06 22:57:50,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:50,099 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:57:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:50,100 INFO L85 PathProgramCache]: Analyzing trace with hash 777649201, now seen corresponding path program 23 times [2021-12-06 22:57:50,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:50,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920947710] [2021-12-06 22:57:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:50,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 276 proven. 809 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:57:50,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:50,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920947710] [2021-12-06 22:57:50,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920947710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:57:50,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787338400] [2021-12-06 22:57:50,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:57:50,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:50,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:57:50,551 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:57:50,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 22:57:51,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 22:57:51,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:57:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 22:57:51,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:57:51,537 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:57:51,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:57:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 325 proven. 760 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:57:52,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:57:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 378 proven. 707 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:57:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787338400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:57:53,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:57:53,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 93 [2021-12-06 22:57:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046260294] [2021-12-06 22:57:53,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:57:53,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 22:57:53,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 22:57:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=7620, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 22:57:53,968 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 94 states, 93 states have (on average 5.451612903225806) internal successors, (507), 94 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:57:54,928 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2021-12-06 22:57:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 22:57:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 5.451612903225806) internal successors, (507), 94 states have internal predecessors, (507), 0 states have call successors, (0), 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 226 [2021-12-06 22:57:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:57:54,929 INFO L225 Difference]: With dead ends: 245 [2021-12-06 22:57:54,929 INFO L226 Difference]: Without dead ends: 241 [2021-12-06 22:57:54,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4177 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2136, Invalid=10074, Unknown=0, NotChecked=0, Total=12210 [2021-12-06 22:57:54,930 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 715 mSDsluCounter, 1763 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:57:54,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 1835 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:57:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-06 22:57:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-12-06 22:57:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.0168776371308017) internal successors, (241), 238 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2021-12-06 22:57:54,932 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 226 [2021-12-06 22:57:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:57:54,932 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2021-12-06 22:57:54,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 5.451612903225806) internal successors, (507), 94 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2021-12-06 22:57:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-06 22:57:54,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:57:54,933 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:57:54,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 22:57:55,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:55,134 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:57:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1990696399, now seen corresponding path program 24 times [2021-12-06 22:57:55,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117877852] [2021-12-06 22:57:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:55,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 711 proven. 477 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:57:55,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:55,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117877852] [2021-12-06 22:57:55,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117877852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:57:55,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402135888] [2021-12-06 22:57:55,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:57:55,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:57:55,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:57:55,573 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:57:55,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 22:58:07,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 22:58:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:58:08,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 22:58:08,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:58:08,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:58:09,935 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-06 22:58:09,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-06 22:58:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 75 proven. 1113 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:58:10,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:58:11,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:58:11,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:58:11,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:58:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 75 proven. 1113 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:58:11,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402135888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:58:11,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:58:11,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 41, 41] total 96 [2021-12-06 22:58:11,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354932600] [2021-12-06 22:58:11,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:58:11,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 22:58:11,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:58:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 22:58:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=8663, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 22:58:11,902 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 96 states, 96 states have (on average 4.84375) internal successors, (465), 96 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:58:15,911 INFO L93 Difference]: Finished difference Result 643 states and 646 transitions. [2021-12-06 22:58:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-12-06 22:58:15,911 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.84375) internal successors, (465), 96 states have internal predecessors, (465), 0 states have call successors, (0), 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 233 [2021-12-06 22:58:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:58:15,912 INFO L225 Difference]: With dead ends: 643 [2021-12-06 22:58:15,912 INFO L226 Difference]: Without dead ends: 253 [2021-12-06 22:58:15,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 415 SyntacticMatches, 17 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 16 DeprecatedPredicates, 8569 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1112, Invalid=26610, Unknown=0, NotChecked=0, Total=27722 [2021-12-06 22:58:15,914 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 214 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 3504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1725 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:58:15,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 3064 Invalid, 3504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1723 Invalid, 0 Unknown, 1725 Unchecked, 0.4s Time] [2021-12-06 22:58:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-06 22:58:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 247. [2021-12-06 22:58:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 246 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2021-12-06 22:58:15,916 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 233 [2021-12-06 22:58:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:58:15,916 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2021-12-06 22:58:15,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.84375) internal successors, (465), 96 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2021-12-06 22:58:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-06 22:58:15,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:58:15,917 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:58:15,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 22:58:16,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-06 22:58:16,118 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:58:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:58:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1648055659, now seen corresponding path program 25 times [2021-12-06 22:58:16,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:58:16,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036845582] [2021-12-06 22:58:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:16,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:58:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 325 proven. 920 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:58:16,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:58:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036845582] [2021-12-06 22:58:16,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036845582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:58:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7566462] [2021-12-06 22:58:16,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:58:16,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:58:16,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:58:16,587 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:58:16,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 22:58:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 22:58:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:58:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 378 proven. 867 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:58:17,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:58:17,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:58:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 378 proven. 867 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:58:18,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7566462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:58:18,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:58:18,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 72 [2021-12-06 22:58:18,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520485676] [2021-12-06 22:58:18,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:58:18,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 22:58:18,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:58:18,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 22:58:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=4614, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 22:58:18,076 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 73 states, 72 states have (on average 5.208333333333333) internal successors, (375), 73 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:58:19,076 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-12-06 22:58:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 22:58:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 5.208333333333333) internal successors, (375), 73 states have internal predecessors, (375), 0 states have call successors, (0), 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 241 [2021-12-06 22:58:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:58:19,077 INFO L225 Difference]: With dead ends: 260 [2021-12-06 22:58:19,077 INFO L226 Difference]: Without dead ends: 256 [2021-12-06 22:58:19,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 442 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1497, Invalid=6693, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 22:58:19,078 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 655 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 2656 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:58:19,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1633 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2656 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:58:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-06 22:58:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 254. [2021-12-06 22:58:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 253 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 256 transitions. [2021-12-06 22:58:19,081 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 256 transitions. Word has length 241 [2021-12-06 22:58:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:58:19,081 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 256 transitions. [2021-12-06 22:58:19,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 5.208333333333333) internal successors, (375), 73 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 256 transitions. [2021-12-06 22:58:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-06 22:58:19,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:58:19,082 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:58:19,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-06 22:58:19,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:58:19,283 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:58:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:58:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1551021803, now seen corresponding path program 26 times [2021-12-06 22:58:19,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:58:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76086889] [2021-12-06 22:58:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:19,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:58:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 814 proven. 541 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:58:19,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:58:19,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76086889] [2021-12-06 22:58:19,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76086889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:58:19,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214838558] [2021-12-06 22:58:19,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:58:19,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:58:19,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:58:19,725 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:58:19,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 22:58:19,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:58:19,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:58:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 22:58:19,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:58:19,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:58:19,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:58:19,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:58:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 920 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:58:21,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:58:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 904 proven. 451 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:58:21,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214838558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:58:21,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:58:21,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 88 [2021-12-06 22:58:21,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938860876] [2021-12-06 22:58:21,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:58:21,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 22:58:21,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:58:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 22:58:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=6357, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 22:58:21,924 INFO L87 Difference]: Start difference. First operand 254 states and 256 transitions. Second operand has 88 states, 88 states have (on average 5.056818181818182) internal successors, (445), 88 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:58:22,926 INFO L93 Difference]: Finished difference Result 439 states and 442 transitions. [2021-12-06 22:58:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:58:22,926 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 5.056818181818182) internal successors, (445), 88 states have internal predecessors, (445), 0 states have call successors, (0), 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 248 [2021-12-06 22:58:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:58:22,927 INFO L225 Difference]: With dead ends: 439 [2021-12-06 22:58:22,927 INFO L226 Difference]: Without dead ends: 261 [2021-12-06 22:58:22,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2684, Invalid=11836, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 22:58:22,928 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 278 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:58:22,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 695 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:58:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-06 22:58:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2021-12-06 22:58:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 256 states have (on average 1.015625) internal successors, (260), 257 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 260 transitions. [2021-12-06 22:58:22,931 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 260 transitions. Word has length 248 [2021-12-06 22:58:22,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:58:22,931 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 260 transitions. [2021-12-06 22:58:22,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 5.056818181818182) internal successors, (445), 88 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 260 transitions. [2021-12-06 22:58:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-06 22:58:22,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:58:22,932 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:58:22,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 22:58:23,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:58:23,133 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:58:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:58:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1678585608, now seen corresponding path program 27 times [2021-12-06 22:58:23,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:58:23,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399838711] [2021-12-06 22:58:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:23,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:58:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 32 proven. 1819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:58:25,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:58:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399838711] [2021-12-06 22:58:25,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399838711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:58:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740422767] [2021-12-06 22:58:25,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:58:25,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:58:25,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:58:25,315 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:58:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 22:58:34,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-06 22:58:34,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:58:34,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 165 conjunts are in the unsatisfiable core [2021-12-06 22:58:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:58:34,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:58:36,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:58:36,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 22:58:37,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:58:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 32 proven. 1819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:58:37,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:58:37,855 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3968 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3968) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 16)) 0)) is different from false [2021-12-06 22:58:37,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:58:37,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:58:37,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:58:37,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:58:37,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:58:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 32 proven. 1441 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:58:39,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740422767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:58:39,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:58:39,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 44] total 135 [2021-12-06 22:58:39,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36906748] [2021-12-06 22:58:39,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:58:39,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-12-06 22:58:39,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:58:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-12-06 22:58:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=17096, Unknown=1, NotChecked=264, Total=18090 [2021-12-06 22:58:39,519 INFO L87 Difference]: Start difference. First operand 258 states and 260 transitions. Second operand has 135 states, 135 states have (on average 4.2592592592592595) internal successors, (575), 135 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:58:47,754 INFO L93 Difference]: Finished difference Result 459 states and 463 transitions. [2021-12-06 22:58:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 22:58:47,754 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 4.2592592592592595) internal successors, (575), 135 states have internal predecessors, (575), 0 states have call successors, (0), 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 252 [2021-12-06 22:58:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:58:47,755 INFO L225 Difference]: With dead ends: 459 [2021-12-06 22:58:47,756 INFO L226 Difference]: Without dead ends: 459 [2021-12-06 22:58:47,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9006 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2125, Invalid=40107, Unknown=2, NotChecked=408, Total=42642 [2021-12-06 22:58:47,757 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 568 mSDsluCounter, 7214 mSDsCounter, 0 mSdLazyCounter, 14725 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 7302 SdHoareTripleChecker+Invalid, 15109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 14725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:58:47,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 7302 Invalid, 15109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 14725 Invalid, 0 Unknown, 224 Unchecked, 4.2s Time] [2021-12-06 22:58:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-06 22:58:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 442. [2021-12-06 22:58:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 440 states have (on average 1.0136363636363637) internal successors, (446), 441 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2021-12-06 22:58:47,761 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 252 [2021-12-06 22:58:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:58:47,761 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2021-12-06 22:58:47,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 4.2592592592592595) internal successors, (575), 135 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:58:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2021-12-06 22:58:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-06 22:58:47,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:58:47,763 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:58:47,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 22:58:47,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-06 22:58:47,963 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:58:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:58:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1778249451, now seen corresponding path program 3 times [2021-12-06 22:58:47,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:58:47,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459321419] [2021-12-06 22:58:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:47,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:58:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1835 backedges. 64 proven. 1771 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:58:49,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:58:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459321419] [2021-12-06 22:58:49,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459321419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:58:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532485640] [2021-12-06 22:58:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:58:49,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:58:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:58:49,380 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:58:49,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 22:58:55,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-06 22:58:55,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:58:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 22:58:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:58:56,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:58:56,588 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 22:58:56,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 22:58:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1835 backedges. 64 proven. 1275 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:58:56,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:58:56,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 22:58:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 22:58:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1835 backedges. 64 proven. 1275 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:58:57,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532485640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:58:57,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:58:57,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 43, 43] total 89 [2021-12-06 22:58:57,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367802087] [2021-12-06 22:58:57,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:58:57,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 22:58:57,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:58:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 22:58:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=7567, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 22:58:57,150 INFO L87 Difference]: Start difference. First operand 442 states and 446 transitions. Second operand has 89 states, 89 states have (on average 3.966292134831461) internal successors, (353), 89 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:02,417 INFO L93 Difference]: Finished difference Result 686 states and 690 transitions. [2021-12-06 22:59:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 22:59:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.966292134831461) internal successors, (353), 89 states have internal predecessors, (353), 0 states have call successors, (0), 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 254 [2021-12-06 22:59:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:02,419 INFO L225 Difference]: With dead ends: 686 [2021-12-06 22:59:02,419 INFO L226 Difference]: Without dead ends: 456 [2021-12-06 22:59:02,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 489 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1271, Invalid=19609, Unknown=0, NotChecked=0, Total=20880 [2021-12-06 22:59:02,420 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 816 mSDsluCounter, 5008 mSDsCounter, 0 mSdLazyCounter, 10314 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 5096 SdHoareTripleChecker+Invalid, 10749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 10314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:02,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 5096 Invalid, 10749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 10314 Invalid, 0 Unknown, 276 Unchecked, 2.6s Time] [2021-12-06 22:59:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-06 22:59:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 450. [2021-12-06 22:59:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 448 states have (on average 1.0133928571428572) internal successors, (454), 449 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 454 transitions. [2021-12-06 22:59:02,424 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 454 transitions. Word has length 254 [2021-12-06 22:59:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:02,424 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 454 transitions. [2021-12-06 22:59:02,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.966292134831461) internal successors, (353), 89 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 454 transitions. [2021-12-06 22:59:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-06 22:59:02,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:02,426 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:02,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 22:59:02,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:59:02,626 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:59:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash -956898254, now seen corresponding path program 4 times [2021-12-06 22:59:02,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:02,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809974189] [2021-12-06 22:59:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:02,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1896 backedges. 378 proven. 1022 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:59:03,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809974189] [2021-12-06 22:59:03,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809974189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:59:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104530799] [2021-12-06 22:59:03,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:59:03,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:59:03,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:59:03,179 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:59:03,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 22:59:03,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:59:03,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:59:03,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-06 22:59:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:59:03,387 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:59:03,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:59:04,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 22:59:05,600 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-06 22:59:05,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-06 22:59:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1896 backedges. 450 proven. 950 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:59:05,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:59:08,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:59:08,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-06 22:59:08,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 22:59:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1896 backedges. 496 proven. 904 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:59:11,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104530799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:59:11,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:59:11,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 44, 44] total 122 [2021-12-06 22:59:11,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292768205] [2021-12-06 22:59:11,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:59:11,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-12-06 22:59:11,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-12-06 22:59:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1476, Invalid=13530, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 22:59:11,235 INFO L87 Difference]: Start difference. First operand 450 states and 454 transitions. Second operand has 123 states, 122 states have (on average 4.80327868852459) internal successors, (586), 123 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:14,725 INFO L93 Difference]: Finished difference Result 474 states and 478 transitions. [2021-12-06 22:59:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 22:59:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 122 states have (on average 4.80327868852459) internal successors, (586), 123 states have internal predecessors, (586), 0 states have call successors, (0), 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 258 [2021-12-06 22:59:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:14,726 INFO L225 Difference]: With dead ends: 474 [2021-12-06 22:59:14,726 INFO L226 Difference]: Without dead ends: 282 [2021-12-06 22:59:14,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 460 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4948 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3354, Invalid=21452, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 22:59:14,728 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1689 mSDsluCounter, 2301 mSDsCounter, 0 mSdLazyCounter, 2698 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 882 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:14,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 2376 Invalid, 3806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2698 Invalid, 0 Unknown, 882 Unchecked, 1.0s Time] [2021-12-06 22:59:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-06 22:59:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2021-12-06 22:59:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 278 states have (on average 1.014388489208633) internal successors, (282), 279 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2021-12-06 22:59:14,730 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 258 [2021-12-06 22:59:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:14,730 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2021-12-06 22:59:14,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 122 states have (on average 4.80327868852459) internal successors, (586), 123 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2021-12-06 22:59:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-06 22:59:14,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:14,731 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:14,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-06 22:59:14,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-06 22:59:14,932 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:59:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:14,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2145558270, now seen corresponding path program 28 times [2021-12-06 22:59:14,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:14,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266868181] [2021-12-06 22:59:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:14,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2218 backedges. 1044 proven. 613 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:59:15,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:15,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266868181] [2021-12-06 22:59:15,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266868181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:59:15,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218889719] [2021-12-06 22:59:15,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:59:15,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:59:15,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:59:15,399 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:59:15,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 22:59:15,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:59:15,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:59:15,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 22:59:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:59:15,614 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:59:15,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:59:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2218 backedges. 1161 proven. 496 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:59:16,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:59:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2218 backedges. 1076 proven. 581 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:59:17,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218889719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:59:17,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:59:17,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 97 [2021-12-06 22:59:17,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947304817] [2021-12-06 22:59:17,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:59:17,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 22:59:17,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 22:59:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1703, Invalid=7609, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 22:59:17,553 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand has 97 states, 97 states have (on average 4.989690721649485) internal successors, (484), 97 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:18,319 INFO L93 Difference]: Finished difference Result 414 states and 416 transitions. [2021-12-06 22:59:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 22:59:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.989690721649485) internal successors, (484), 97 states have internal predecessors, (484), 0 states have call successors, (0), 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 274 [2021-12-06 22:59:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:18,321 INFO L225 Difference]: With dead ends: 414 [2021-12-06 22:59:18,321 INFO L226 Difference]: Without dead ends: 287 [2021-12-06 22:59:18,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 490 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5428 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2774, Invalid=10798, Unknown=0, NotChecked=0, Total=13572 [2021-12-06 22:59:18,322 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 380 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:18,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 673 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:59:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-06 22:59:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2021-12-06 22:59:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 282 states have (on average 1.0141843971631206) internal successors, (286), 283 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 286 transitions. [2021-12-06 22:59:18,324 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 286 transitions. Word has length 274 [2021-12-06 22:59:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:18,324 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 286 transitions. [2021-12-06 22:59:18,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.989690721649485) internal successors, (484), 97 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 286 transitions. [2021-12-06 22:59:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-06 22:59:18,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:18,326 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:18,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 22:59:18,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 22:59:18,527 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:59:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1478564961, now seen corresponding path program 29 times [2021-12-06 22:59:18,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:18,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508745258] [2021-12-06 22:59:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:18,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 1041 proven. 681 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:59:19,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508745258] [2021-12-06 22:59:19,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508745258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:59:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706766275] [2021-12-06 22:59:19,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:59:19,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:59:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:59:19,087 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:59:19,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 22:59:25,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-06 22:59:25,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:59:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 22:59:25,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:59:25,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:59:25,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:59:25,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:59:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 1161 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:59:26,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:59:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 1161 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:59:28,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706766275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:59:28,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:59:28,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 98 [2021-12-06 22:59:28,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324823099] [2021-12-06 22:59:28,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:59:28,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 22:59:28,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 22:59:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=7903, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 22:59:28,095 INFO L87 Difference]: Start difference. First operand 284 states and 286 transitions. Second operand has 98 states, 98 states have (on average 5.163265306122449) internal successors, (506), 98 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:29,352 INFO L93 Difference]: Finished difference Result 491 states and 494 transitions. [2021-12-06 22:59:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 22:59:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.163265306122449) internal successors, (506), 98 states have internal predecessors, (506), 0 states have call successors, (0), 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 278 [2021-12-06 22:59:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:29,354 INFO L225 Difference]: With dead ends: 491 [2021-12-06 22:59:29,354 INFO L226 Difference]: Without dead ends: 291 [2021-12-06 22:59:29,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 497 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4712 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3322, Invalid=14768, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 22:59:29,355 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 246 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:29,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 803 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:59:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-06 22:59:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2021-12-06 22:59:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 286 states have (on average 1.013986013986014) internal successors, (290), 287 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 290 transitions. [2021-12-06 22:59:29,357 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 290 transitions. Word has length 278 [2021-12-06 22:59:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 290 transitions. [2021-12-06 22:59:29,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.163265306122449) internal successors, (506), 98 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 290 transitions. [2021-12-06 22:59:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-12-06 22:59:29,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:29,360 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:29,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 22:59:29,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:59:29,561 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:59:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:29,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1647708924, now seen corresponding path program 30 times [2021-12-06 22:59:29,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:29,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406411964] [2021-12-06 22:59:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:29,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 36 proven. 2316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:31,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406411964] [2021-12-06 22:59:31,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406411964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:59:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170596695] [2021-12-06 22:59:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:59:31,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:59:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:59:31,954 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:59:31,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 22:59:52,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 22:59:52,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:59:52,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 138 conjunts are in the unsatisfiable core [2021-12-06 22:59:52,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:59:52,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:59:54,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:59:54,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:59:54,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:59:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 36 proven. 1755 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:59:54,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:59:55,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4735 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4735) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 18)) 0)) is different from false [2021-12-06 22:59:55,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:59:55,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:59:55,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:59:55,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:59:55,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:59:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 36 proven. 1755 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:59:55,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170596695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:59:55,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:59:55,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 46, 46] total 94 [2021-12-06 22:59:55,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878654025] [2021-12-06 22:59:55,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:59:55,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-06 22:59:55,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:55,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-06 22:59:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=8331, Unknown=1, NotChecked=182, Total=8742 [2021-12-06 22:59:55,743 INFO L87 Difference]: Start difference. First operand 288 states and 290 transitions. Second operand has 94 states, 94 states have (on average 4.117021276595745) internal successors, (387), 94 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:00:01,843 INFO L93 Difference]: Finished difference Result 502 states and 505 transitions. [2021-12-06 23:00:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 23:00:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 4.117021276595745) internal successors, (387), 94 states have internal predecessors, (387), 0 states have call successors, (0), 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 282 [2021-12-06 23:00:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:00:01,845 INFO L225 Difference]: With dead ends: 502 [2021-12-06 23:00:01,845 INFO L226 Difference]: Without dead ends: 502 [2021-12-06 23:00:01,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 533 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=633, Invalid=18552, Unknown=1, NotChecked=274, Total=19460 [2021-12-06 23:00:01,846 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 178 mSDsluCounter, 6456 mSDsCounter, 0 mSdLazyCounter, 11701 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6538 SdHoareTripleChecker+Invalid, 12084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 11701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:00:01,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6538 Invalid, 12084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 11701 Invalid, 0 Unknown, 332 Unchecked, 3.5s Time] [2021-12-06 23:00:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-12-06 23:00:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 494. [2021-12-06 23:00:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 492 states have (on average 1.0121951219512195) internal successors, (498), 493 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 498 transitions. [2021-12-06 23:00:01,850 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 498 transitions. Word has length 282 [2021-12-06 23:00:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:00:01,850 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 498 transitions. [2021-12-06 23:00:01,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 4.117021276595745) internal successors, (387), 94 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 498 transitions. [2021-12-06 23:00:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-06 23:00:01,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:00:01,851 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:01,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 23:00:02,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:02,052 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 23:00:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1385971703, now seen corresponding path program 5 times [2021-12-06 23:00:02,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:02,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810467139] [2021-12-06 23:00:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:02,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2334 backedges. 72 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:03,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:03,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810467139] [2021-12-06 23:00:03,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810467139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:03,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972963308] [2021-12-06 23:00:03,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:00:03,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:03,743 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:03,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 23:00:23,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-06 23:00:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:00:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-06 23:00:23,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:24,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 23:00:24,847 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 23:00:24,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 23:00:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2334 backedges. 72 proven. 1632 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-06 23:00:24,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:25,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 23:00:25,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 23:00:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2334 backedges. 72 proven. 1632 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-06 23:00:25,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972963308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:25,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:25,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 47, 47] total 97 [2021-12-06 23:00:25,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292809419] [2021-12-06 23:00:25,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:25,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 23:00:25,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 23:00:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=9025, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 23:00:25,506 INFO L87 Difference]: Start difference. First operand 494 states and 498 transitions. Second operand has 97 states, 97 states have (on average 4.030927835051546) internal successors, (391), 97 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:00:31,113 INFO L93 Difference]: Finished difference Result 766 states and 770 transitions. [2021-12-06 23:00:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 23:00:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.030927835051546) internal successors, (391), 97 states have internal predecessors, (391), 0 states have call successors, (0), 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 284 [2021-12-06 23:00:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:00:31,115 INFO L225 Difference]: With dead ends: 766 [2021-12-06 23:00:31,115 INFO L226 Difference]: Without dead ends: 508 [2021-12-06 23:00:31,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 534 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1289, Invalid=22891, Unknown=0, NotChecked=0, Total=24180 [2021-12-06 23:00:31,116 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1719 mSDsluCounter, 6356 mSDsCounter, 0 mSdLazyCounter, 13118 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 6454 SdHoareTripleChecker+Invalid, 13665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 13118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:00:31,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 6454 Invalid, 13665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 13118 Invalid, 0 Unknown, 234 Unchecked, 3.2s Time] [2021-12-06 23:00:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-12-06 23:00:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 502. [2021-12-06 23:00:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 500 states have (on average 1.012) internal successors, (506), 501 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 506 transitions. [2021-12-06 23:00:31,120 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 506 transitions. Word has length 284 [2021-12-06 23:00:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:00:31,120 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 506 transitions. [2021-12-06 23:00:31,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.030927835051546) internal successors, (391), 97 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 506 transitions. [2021-12-06 23:00:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-06 23:00:31,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:00:31,122 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:31,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 23:00:31,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-12-06 23:00:31,322 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 23:00:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1035681178, now seen corresponding path program 6 times [2021-12-06 23:00:31,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:31,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976525940] [2021-12-06 23:00:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:31,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 496 proven. 1277 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-06 23:00:31,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:31,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976525940] [2021-12-06 23:00:31,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976525940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:31,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478871180] [2021-12-06 23:00:31,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:00:31,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:31,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:31,992 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:31,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 23:01:05,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 23:01:05,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:01:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 23:01:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:01:05,192 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 23:01:05,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 23:01:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 561 proven. 1212 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-06 23:01:06,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:01:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 630 proven. 1143 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-06 23:01:09,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478871180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:01:09,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:01:09,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 121 [2021-12-06 23:01:09,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493200910] [2021-12-06 23:01:09,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:01:09,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-06 23:01:09,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:09,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-06 23:01:09,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2083, Invalid=12679, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 23:01:09,269 INFO L87 Difference]: Start difference. First operand 502 states and 506 transitions. Second operand has 122 states, 121 states have (on average 5.3884297520661155) internal successors, (652), 122 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:01:10,410 INFO L93 Difference]: Finished difference Result 515 states and 519 transitions. [2021-12-06 23:01:10,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 23:01:10,411 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 5.3884297520661155) internal successors, (652), 122 states have internal predecessors, (652), 0 states have call successors, (0), 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 288 [2021-12-06 23:01:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:01:10,412 INFO L225 Difference]: With dead ends: 515 [2021-12-06 23:01:10,412 INFO L226 Difference]: Without dead ends: 305 [2021-12-06 23:01:10,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6738 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3859, Invalid=16447, Unknown=0, NotChecked=0, Total=20306 [2021-12-06 23:01:10,413 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 2156 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2156 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:01:10,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2156 Valid, 1254 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:01:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-06 23:01:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2021-12-06 23:01:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 301 states have (on average 1.0132890365448506) internal successors, (305), 302 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2021-12-06 23:01:10,416 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 288 [2021-12-06 23:01:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:01:10,416 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2021-12-06 23:01:10,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 5.3884297520661155) internal successors, (652), 122 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2021-12-06 23:01:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-06 23:01:10,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:01:10,417 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:01:10,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 23:01:10,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-06 23:01:10,618 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 23:01:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1828395158, now seen corresponding path program 31 times [2021-12-06 23:01:10,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434561481] [2021-12-06 23:01:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:10,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 95 proven. 2530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:12,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434561481] [2021-12-06 23:01:12,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434561481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:01:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992490569] [2021-12-06 23:01:12,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:01:12,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:01:12,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:01:12,499 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:01:12,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 23:01:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:12,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-06 23:01:12,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:01:13,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 23:01:14,246 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 23:01:14,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-06 23:01:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 95 proven. 1827 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-06 23:01:14,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:01:14,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 23:01:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 23:01:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 95 proven. 1827 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-06 23:01:14,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992490569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:01:14,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:01:14,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 49, 49] total 101 [2021-12-06 23:01:14,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482802520] [2021-12-06 23:01:14,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:01:14,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 23:01:14,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 23:01:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=9802, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 23:01:14,948 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand has 101 states, 101 states have (on average 4.03960396039604) internal successors, (408), 101 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:01:22,003 INFO L93 Difference]: Finished difference Result 449 states and 451 transitions. [2021-12-06 23:01:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 23:01:22,003 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 4.03960396039604) internal successors, (408), 101 states have internal predecessors, (408), 0 states have call successors, (0), 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 297 [2021-12-06 23:01:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:01:22,004 INFO L225 Difference]: With dead ends: 449 [2021-12-06 23:01:22,005 INFO L226 Difference]: Without dead ends: 313 [2021-12-06 23:01:22,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 558 SyntacticMatches, 4 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4406 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1530, Invalid=25860, Unknown=0, NotChecked=0, Total=27390 [2021-12-06 23:01:22,006 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1557 mSDsluCounter, 7004 mSDsCounter, 0 mSdLazyCounter, 14582 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 7107 SdHoareTripleChecker+Invalid, 15278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 14582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:01:22,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 7107 Invalid, 15278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 14582 Invalid, 0 Unknown, 390 Unchecked, 3.6s Time] [2021-12-06 23:01:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-12-06 23:01:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 307. [2021-12-06 23:01:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 306 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 309 transitions. [2021-12-06 23:01:22,009 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 309 transitions. Word has length 297 [2021-12-06 23:01:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:01:22,009 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 309 transitions. [2021-12-06 23:01:22,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 4.03960396039604) internal successors, (408), 101 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 309 transitions. [2021-12-06 23:01:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-06 23:01:22,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:01:22,010 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:01:22,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 23:01:22,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:01:22,211 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 23:01:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash -755170259, now seen corresponding path program 32 times [2021-12-06 23:01:22,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:22,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825968335] [2021-12-06 23:01:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:22,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 561 proven. 1434 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-06 23:01:22,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:22,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825968335] [2021-12-06 23:01:22,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825968335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:01:22,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088798435] [2021-12-06 23:01:22,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:01:22,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:01:22,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:01:22,909 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:01:22,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 23:01:23,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:01:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:01:23,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-06 23:01:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:01:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 630 proven. 1365 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-06 23:01:24,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:01:24,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 23:01:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 630 proven. 1365 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-06 23:01:25,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088798435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:01:25,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:01:25,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 108 [2021-12-06 23:01:25,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960372389] [2021-12-06 23:01:25,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:01:25,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-06 23:01:25,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-06 23:01:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1648, Invalid=10124, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 23:01:25,754 INFO L87 Difference]: Start difference. First operand 307 states and 309 transitions. Second operand has 109 states, 108 states have (on average 5.074074074074074) internal successors, (548), 109 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:01:27,298 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2021-12-06 23:01:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 23:01:27,298 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 5.074074074074074) internal successors, (548), 109 states have internal predecessors, (548), 0 states have call successors, (0), 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 301 [2021-12-06 23:01:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:01:27,299 INFO L225 Difference]: With dead ends: 320 [2021-12-06 23:01:27,299 INFO L226 Difference]: Without dead ends: 316 [2021-12-06 23:01:27,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 535 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5233 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3395, Invalid=13635, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 23:01:27,300 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1886 mSDsluCounter, 2478 mSDsCounter, 0 mSdLazyCounter, 4283 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 2570 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 4283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:01:27,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1886 Valid, 2570 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 4283 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:01:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-06 23:01:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-12-06 23:01:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 312 states have (on average 1.0128205128205128) internal successors, (316), 313 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 316 transitions. [2021-12-06 23:01:27,303 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 316 transitions. Word has length 301 [2021-12-06 23:01:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:01:27,303 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 316 transitions. [2021-12-06 23:01:27,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 5.074074074074074) internal successors, (548), 109 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 316 transitions. [2021-12-06 23:01:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-06 23:01:27,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:01:27,305 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:01:27,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-06 23:01:27,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-12-06 23:01:27,506 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 23:01:27,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1317462611, now seen corresponding path program 33 times [2021-12-06 23:01:27,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:27,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618188956] [2021-12-06 23:01:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:27,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2836 backedges. 1296 proven. 837 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-12-06 23:01:28,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:28,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618188956] [2021-12-06 23:01:28,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618188956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:01:28,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997879821] [2021-12-06 23:01:28,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:01:28,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:01:28,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:01:28,190 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:01:28,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 23:01:48,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-12-06 23:01:48,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:01:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 23:01:48,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:01:48,183 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 23:01:48,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 23:01:48,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:01:48,786 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-06 23:01:48,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-06 23:01:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2836 backedges. 76 proven. 138 refuted. 0 times theorem prover too weak. 2622 trivial. 0 not checked. [2021-12-06 23:01:48,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:01:52,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:01:52,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 23:01:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 23:01:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2836 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 2622 trivial. 0 not checked. [2021-12-06 23:01:53,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997879821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:01:53,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:01:53,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 11, 11] total 65 [2021-12-06 23:01:53,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277725902] [2021-12-06 23:01:53,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:01:53,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 23:01:53,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 23:01:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=3628, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 23:01:53,638 INFO L87 Difference]: Start difference. First operand 314 states and 316 transitions. Second operand has 65 states, 65 states have (on average 4.676923076923077) internal successors, (304), 65 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:02:01,244 INFO L93 Difference]: Finished difference Result 541 states and 544 transitions. [2021-12-06 23:02:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-12-06 23:02:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.676923076923077) internal successors, (304), 65 states have internal predecessors, (304), 0 states have call successors, (0), 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 308 [2021-12-06 23:02:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:02:01,245 INFO L225 Difference]: With dead ends: 541 [2021-12-06 23:02:01,245 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 23:02:01,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 577 SyntacticMatches, 19 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16609 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=7653, Invalid=50669, Unknown=0, NotChecked=0, Total=58322 [2021-12-06 23:02:01,247 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 169 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:02:01,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 232 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2158 Invalid, 0 Unknown, 194 Unchecked, 0.6s Time] [2021-12-06 23:02:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 23:02:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 23:02:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 23:02:01,248 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 308 [2021-12-06 23:02:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:02:01,248 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 23:02:01,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.676923076923077) internal successors, (304), 65 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 23:02:01,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 23:02:01,250 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-12-06 23:02:01,250 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-12-06 23:02:01,250 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 19 remaining) [2021-12-06 23:02:01,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 19 remaining) [2021-12-06 23:02:01,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 19 remaining) [2021-12-06 23:02:01,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (2 of 19 remaining) [2021-12-06 23:02:01,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (1 of 19 remaining) [2021-12-06 23:02:01,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-12-06 23:02:01,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 23:02:01,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-06 23:02:01,461 INFO L732 BasicCegarLoop]: Path program histogram: [33, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:01,465 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 23:02:01,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 11:02:01 BoogieIcfgContainer [2021-12-06 23:02:01,471 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 23:02:01,472 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 23:02:01,473 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 23:02:01,473 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 23:02:01,474 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:54:47" (3/4) ... [2021-12-06 23:02:01,481 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 23:02:01,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-06 23:02:01,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 23:02:01,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 23:02:01,501 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 23:02:01,528 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 23:02:01,529 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 23:02:01,529 INFO L158 Benchmark]: Toolchain (without parser) took 434298.11ms. Allocated memory was 127.9MB in the beginning and 327.2MB in the end (delta: 199.2MB). Free memory was 103.6MB in the beginning and 107.2MB in the end (delta: -3.5MB). Peak memory consumption was 197.7MB. Max. memory is 16.1GB. [2021-12-06 23:02:01,529 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 58.8MB in the beginning and 58.7MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:02:01,529 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.98ms. Allocated memory is still 127.9MB. Free memory was 103.6MB in the beginning and 87.9MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-06 23:02:01,529 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.51ms. Allocated memory is still 127.9MB. Free memory was 87.9MB in the beginning and 85.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 23:02:01,529 INFO L158 Benchmark]: Boogie Preprocessor took 20.14ms. Allocated memory is still 127.9MB. Free memory was 85.8MB in the beginning and 84.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:02:01,530 INFO L158 Benchmark]: RCFGBuilder took 290.57ms. Allocated memory is still 127.9MB. Free memory was 84.7MB in the beginning and 70.6MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-06 23:02:01,530 INFO L158 Benchmark]: TraceAbstraction took 433617.15ms. Allocated memory was 127.9MB in the beginning and 327.2MB in the end (delta: 199.2MB). Free memory was 70.2MB in the beginning and 110.1MB in the end (delta: -39.9MB). Peak memory consumption was 162.1MB. Max. memory is 16.1GB. [2021-12-06 23:02:01,530 INFO L158 Benchmark]: Witness Printer took 56.36ms. Allocated memory is still 327.2MB. Free memory was 110.1MB in the beginning and 107.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 23:02:01,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 58.8MB in the beginning and 58.7MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.98ms. Allocated memory is still 127.9MB. Free memory was 103.6MB in the beginning and 87.9MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.51ms. Allocated memory is still 127.9MB. Free memory was 87.9MB in the beginning and 85.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.14ms. Allocated memory is still 127.9MB. Free memory was 85.8MB in the beginning and 84.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 290.57ms. Allocated memory is still 127.9MB. Free memory was 84.7MB in the beginning and 70.6MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 433617.15ms. Allocated memory was 127.9MB in the beginning and 327.2MB in the end (delta: 199.2MB). Free memory was 70.2MB in the beginning and 110.1MB in the end (delta: -39.9MB). Peak memory consumption was 162.1MB. Max. memory is 16.1GB. * Witness Printer took 56.36ms. Allocated memory is still 327.2MB. Free memory was 110.1MB in the beginning and 107.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 433.6s, OverallIterations: 76, TraceHistogramMax: 21, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.1s, AutomataDifference: 111.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30296 SdHoareTripleChecker+Valid, 41.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30296 mSDsluCounter, 95372 SdHoareTripleChecker+Invalid, 35.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12219 IncrementalHoareTripleChecker+Unchecked, 91729 mSDsCounter, 5077 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 148597 IncrementalHoareTripleChecker+Invalid, 165893 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5077 mSolverCounterUnsat, 3643 mSDtfsCounter, 148597 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21835 GetRequests, 16041 SyntacticMatches, 153 SemanticMatches, 5641 ConstructedPredicates, 5 IntricatePredicates, 65 DeprecatedPredicates, 165035 ImplicationChecksByTransitivity, 156.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=502occurred in iteration=72, InterpolantAutomatonStates: 2762, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 76 MinimizatonAttempts, 916 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 152.6s SatisfiabilityAnalysisTime, 150.5s InterpolantComputationTime, 18332 NumberOfCodeBlocks, 18166 NumberOfCodeBlocksAsserted, 436 NumberOfCheckSat, 27155 ConstructedInterpolants, 1778 QuantifiedInterpolants, 326911 SizeOfPredicates, 893 NumberOfNonLiveVariables, 36763 ConjunctsInSsa, 4015 ConjunctsInUnsatCore, 191 InterpolantComputations, 19 PerfectInterpolantSequences, 71251/155460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-06 23:02:01,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d2dca38-af1f-45ef-9fe8-ea1884b41806/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE