./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-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_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/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_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/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_f9149126-04b3-42e1-96bd-51d0b04ff36b/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 e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:42:44,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:42:44,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:42:44,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:42:44,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:42:44,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:42:44,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:42:44,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:42:44,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:42:44,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:42:44,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:42:44,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:42:44,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:42:44,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:42:44,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:42:44,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:42:44,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:42:44,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:42:44,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:42:44,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:42:44,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:42:44,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:42:44,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:42:44,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:42:44,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:42:44,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:42:44,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:42:44,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:42:44,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:42:44,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:42:44,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:42:44,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:42:44,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:42:44,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:42:44,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:42:44,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:42:44,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:42:44,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:42:44,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:42:44,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:42:44,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:42:44,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 19:42:44,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:42:44,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:42:44,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:42:44,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:42:44,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:42:44,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:42:44,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:42:44,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:42:44,411 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:42:44,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:42:44,411 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:42:44,411 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 19:42:44,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:42:44,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:42:44,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:42:44,412 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 19:42:44,412 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 19:42:44,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 19:42:44,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:42:44,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:42:44,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:42:44,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:42:44,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:42:44,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:42:44,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:42:44,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:42:44,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:42:44,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:42:44,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:42:44,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:42:44,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:42:44,414 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_f9149126-04b3-42e1-96bd-51d0b04ff36b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 [2021-12-06 19:42:44,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:42:44,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:42:44,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:42:44,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:42:44,632 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:42:44,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-12-06 19:42:44,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/data/0695ed772/8ff3e46950cf41c0acbe7bbcced6b43a/FLAGc405c86c0 [2021-12-06 19:42:45,091 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:42:45,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2021-12-06 19:42:45,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/data/0695ed772/8ff3e46950cf41c0acbe7bbcced6b43a/FLAGc405c86c0 [2021-12-06 19:42:45,112 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/data/0695ed772/8ff3e46950cf41c0acbe7bbcced6b43a [2021-12-06 19:42:45,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:42:45,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:42:45,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:42:45,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:42:45,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:42:45,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ebe4651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45, skipping insertion in model container [2021-12-06 19:42:45,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:42:45,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:42:45,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:42:45,348 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:42:45,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:42:45,394 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:42:45,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45 WrapperNode [2021-12-06 19:42:45,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:42:45,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:42:45,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:42:45,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:42:45,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,433 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-12-06 19:42:45,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:42:45,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:42:45,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:42:45,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:42:45,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:42:45,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:42:45,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:42:45,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:42:45,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (1/1) ... [2021-12-06 19:42:45,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:42:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:45,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:42:45,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:42:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:42:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:42:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:42:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:42:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:42:45,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:42:45,584 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:42:45,585 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:42:45,724 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:42:45,729 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:42:45,729 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 19:42:45,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:42:45 BoogieIcfgContainer [2021-12-06 19:42:45,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:42:45,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:42:45,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:42:45,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:42:45,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:42:45" (1/3) ... [2021-12-06 19:42:45,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63224629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:42:45, skipping insertion in model container [2021-12-06 19:42:45,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:42:45" (2/3) ... [2021-12-06 19:42:45,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63224629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:42:45, skipping insertion in model container [2021-12-06 19:42:45,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:42:45" (3/3) ... [2021-12-06 19:42:45,736 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2021-12-06 19:42:45,740 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:42:45,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-06 19:42:45,773 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:42:45,778 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 19:42:45,778 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-06 19:42:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 19:42:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:42:45,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:45,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:45,795 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 19:42:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-06 19:42:45,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:45,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759383923] [2021-12-06 19:42:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:45,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:45,969 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 19:42:45,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:45,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759383923] [2021-12-06 19:42:45,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759383923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:45,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:45,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:42:45,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388568642] [2021-12-06 19:42:45,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:45,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:42:45,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:42:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:42:45,999 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 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 19:42:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,044 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-06 19:42:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:42:46,046 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 19:42:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,052 INFO L225 Difference]: With dead ends: 100 [2021-12-06 19:42:46,052 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 19:42:46,053 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 19:42:46,056 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 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 19:42:46,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 19:42:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2021-12-06 19:42:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 19:42:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-06 19:42:46,089 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2021-12-06 19:42:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,089 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-06 19:42:46,090 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 19:42:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-06 19:42:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:42:46,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:42:46,091 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 19:42:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-06 19:42:46,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701878076] [2021-12-06 19:42:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,161 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 19:42:46,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701878076] [2021-12-06 19:42:46,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701878076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:46,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:46,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:42:46,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361601373] [2021-12-06 19:42:46,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:46,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:42:46,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:46,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:42:46,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:42:46,166 INFO L87 Difference]: Start difference. First operand 55 states and 63 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 19:42:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,203 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-06 19:42:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:42:46,203 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 19:42:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,204 INFO L225 Difference]: With dead ends: 53 [2021-12-06 19:42:46,205 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 19:42:46,205 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 19:42:46,207 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 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 19:42:46,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 19:42:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 19:42:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) 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 19:42:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-06 19:42:46,215 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-12-06 19:42:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,215 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-06 19:42:46,216 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 19:42:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-06 19:42:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:42:46,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:42:46,217 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 19:42:46,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-06 19:42:46,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567203610] [2021-12-06 19:42:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,288 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 19:42:46,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567203610] [2021-12-06 19:42:46,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567203610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:46,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:46,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:42:46,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239588762] [2021-12-06 19:42:46,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:46,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:42:46,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:42:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:42:46,292 INFO L87 Difference]: Start difference. First operand 53 states and 61 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 19:42:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,371 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-12-06 19:42:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:42:46,371 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 19:42:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,372 INFO L225 Difference]: With dead ends: 97 [2021-12-06 19:42:46,372 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 19:42:46,373 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 19:42:46,374 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 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 19:42:46,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 19:42:46,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-12-06 19:42:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 19:42:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-06 19:42:46,382 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-12-06 19:42:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,382 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-06 19:42:46,383 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 19:42:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-06 19:42:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 19:42:46,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:42:46,384 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 19:42:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-06 19:42:46,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581107261] [2021-12-06 19:42:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,436 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 19:42:46,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581107261] [2021-12-06 19:42:46,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581107261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:46,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:46,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:42:46,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327937724] [2021-12-06 19:42:46,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:46,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:42:46,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:46,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:42:46,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:42:46,438 INFO L87 Difference]: Start difference. First operand 55 states and 64 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 19:42:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,467 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-12-06 19:42:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:42:46,467 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 19:42:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,468 INFO L225 Difference]: With dead ends: 54 [2021-12-06 19:42:46,468 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 19:42:46,468 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 19:42:46,470 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 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 19:42:46,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 19:42:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 19:42:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 19:42:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-06 19:42:46,476 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2021-12-06 19:42:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,476 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-06 19:42:46,477 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 19:42:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-06 19:42:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 19:42:46,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:42:46,478 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 19:42:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-06 19:42:46,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698794885] [2021-12-06 19:42:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,516 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 19:42:46,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698794885] [2021-12-06 19:42:46,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698794885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:46,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:46,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:42:46,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100430404] [2021-12-06 19:42:46,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:46,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:42:46,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:46,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:42:46,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:42:46,518 INFO L87 Difference]: Start difference. First operand 54 states and 63 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 19:42:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,538 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-12-06 19:42:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:42:46,538 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 19:42:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,540 INFO L225 Difference]: With dead ends: 98 [2021-12-06 19:42:46,540 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 19:42:46,540 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 19:42:46,541 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:46,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 19:42:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-12-06 19:42:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 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 19:42:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-12-06 19:42:46,549 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2021-12-06 19:42:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,549 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-12-06 19:42:46,549 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 19:42:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-12-06 19:42:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 19:42:46,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:42:46,551 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 19:42:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-06 19:42:46,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480341448] [2021-12-06 19:42:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,591 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 19:42:46,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480341448] [2021-12-06 19:42:46,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480341448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:46,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:46,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:42:46,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674089930] [2021-12-06 19:42:46,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:46,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:42:46,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:42:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:42:46,594 INFO L87 Difference]: Start difference. First operand 65 states and 77 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 19:42:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,634 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2021-12-06 19:42:46,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:42:46,634 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 19:42:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,635 INFO L225 Difference]: With dead ends: 102 [2021-12-06 19:42:46,635 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 19:42:46,635 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 19:42:46,636 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 163 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:46,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 68 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 19:42:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 63. [2021-12-06 19:42:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) 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 19:42:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-06 19:42:46,641 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-12-06 19:42:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,641 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-06 19:42:46,641 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 19:42:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-06 19:42:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 19:42:46,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:42:46,642 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 19:42:46,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-06 19:42:46,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75806278] [2021-12-06 19:42:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,689 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 19:42:46,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75806278] [2021-12-06 19:42:46,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75806278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:46,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:46,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:42:46,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861791276] [2021-12-06 19:42:46,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:46,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:42:46,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:42:46,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:42:46,692 INFO L87 Difference]: Start difference. First operand 63 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 19:42:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,742 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-12-06 19:42:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:42:46,742 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 19:42:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,743 INFO L225 Difference]: With dead ends: 98 [2021-12-06 19:42:46,743 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 19:42:46,743 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 19:42:46,744 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 91 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 19:42:46,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 19:42:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-12-06 19:42:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 19:42:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-12-06 19:42:46,748 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2021-12-06 19:42:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,749 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-12-06 19:42:46,749 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 19:42:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-12-06 19:42:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:42:46,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:42:46,749 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 19:42:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-06 19:42:46,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858175939] [2021-12-06 19:42:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,789 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 19:42:46,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858175939] [2021-12-06 19:42:46,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858175939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:46,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:46,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:42:46,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486410358] [2021-12-06 19:42:46,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:46,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:42:46,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:46,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:42:46,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:42:46,791 INFO L87 Difference]: Start difference. First operand 65 states and 78 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 19:42:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:46,810 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-12-06 19:42:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:42:46,811 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 19:42:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:46,811 INFO L225 Difference]: With dead ends: 64 [2021-12-06 19:42:46,811 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 19:42:46,812 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 19:42:46,812 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 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 19:42:46,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 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 19:42:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 19:42:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-06 19:42:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 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 19:42:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-12-06 19:42:46,817 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2021-12-06 19:42:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:46,817 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-12-06 19:42:46,817 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 19:42:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-12-06 19:42:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:42:46,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:46,818 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:46,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:42:46,818 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 19:42:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:46,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-06 19:42:46,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:46,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773856666] [2021-12-06 19:42:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,875 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 19:42:46,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773856666] [2021-12-06 19:42:46,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773856666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364055756] [2021-12-06 19:42:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:46,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:46,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:46,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:46,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:42:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 19:42:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:46,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:47,000 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 19:42:47,007 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 19:42:47,078 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 19:42:47,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:47,247 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 19:42:47,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364055756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:47,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:47,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-06 19:42:47,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625821927] [2021-12-06 19:42:47,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:47,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:42:47,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:42:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:42:47,249 INFO L87 Difference]: Start difference. First operand 64 states and 77 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 19:42:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:47,396 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2021-12-06 19:42:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:42:47,396 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 19:42:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:47,397 INFO L225 Difference]: With dead ends: 149 [2021-12-06 19:42:47,397 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 19:42:47,397 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 19:42:47,398 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 250 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:47,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 281 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 19:42:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2021-12-06 19:42:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 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 19:42:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-06 19:42:47,402 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2021-12-06 19:42:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:47,402 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-06 19:42:47,402 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 19:42:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-06 19:42:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 19:42:47,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:47,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:47,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:42:47,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:47,604 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446106, now seen corresponding path program 1 times [2021-12-06 19:42:47,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664889935] [2021-12-06 19:42:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:47,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:47,625 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 19:42:47,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664889935] [2021-12-06 19:42:47,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664889935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:47,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:47,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:42:47,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215316145] [2021-12-06 19:42:47,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:47,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:42:47,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:47,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:42:47,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:42:47,626 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 19:42:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:47,648 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-06 19:42:47,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:42:47,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 19:42:47,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:47,648 INFO L225 Difference]: With dead ends: 57 [2021-12-06 19:42:47,648 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 19:42:47,649 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 19:42:47,649 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 62 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:47,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 19:42:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-06 19:42:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 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 19:42:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-06 19:42:47,652 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2021-12-06 19:42:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:47,652 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-06 19:42:47,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 19:42:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-06 19:42:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 19:42:47,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:47,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:47,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:42:47,653 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446105, now seen corresponding path program 1 times [2021-12-06 19:42:47,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:47,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122393017] [2021-12-06 19:42:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:47,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:47,698 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 19:42:47,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:47,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122393017] [2021-12-06 19:42:47,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122393017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:47,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:47,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:42:47,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204441948] [2021-12-06 19:42:47,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:47,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:42:47,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:47,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:42:47,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:42:47,700 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 19:42:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:47,744 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-12-06 19:42:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:42:47,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 19:42:47,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:47,745 INFO L225 Difference]: With dead ends: 72 [2021-12-06 19:42:47,745 INFO L226 Difference]: Without dead ends: 72 [2021-12-06 19:42:47,745 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 19:42:47,746 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 129 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:47,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 67 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-06 19:42:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-12-06 19:42:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 61 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 19:42:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-12-06 19:42:47,750 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 13 [2021-12-06 19:42:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:47,750 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-12-06 19:42:47,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 19:42:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-12-06 19:42:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 19:42:47,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:47,752 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:47,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:42:47,752 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 19:42:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-06 19:42:47,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:47,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378480535] [2021-12-06 19:42:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:47,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:47,805 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 19:42:47,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378480535] [2021-12-06 19:42:47,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378480535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468109569] [2021-12-06 19:42:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:47,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:47,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:47,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:47,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:42:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:47,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:42:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:47,867 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:42:47,867 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 19:42:47,928 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 19:42:47,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:48,060 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 19:42:48,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468109569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:48,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:48,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 19:42:48,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89700277] [2021-12-06 19:42:48,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:48,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:42:48,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:48,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:42:48,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:42:48,061 INFO L87 Difference]: Start difference. First operand 62 states and 75 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 19:42:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:48,181 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2021-12-06 19:42:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:42:48,182 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 19:42:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:48,183 INFO L225 Difference]: With dead ends: 130 [2021-12-06 19:42:48,183 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 19:42:48,183 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 19:42:48,184 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 308 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:48,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 241 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 19:42:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 59. [2021-12-06 19:42:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.42) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 19:42:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-12-06 19:42:48,188 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 13 [2021-12-06 19:42:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:48,188 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-12-06 19:42:48,188 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 19:42:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-12-06 19:42:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 19:42:48,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:48,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:48,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 19:42:48,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:42:48,391 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash 172810365, now seen corresponding path program 1 times [2021-12-06 19:42:48,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:48,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382400558] [2021-12-06 19:42:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:48,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:48,587 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 19:42:48,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:48,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382400558] [2021-12-06 19:42:48,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382400558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:48,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:48,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:42:48,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042429919] [2021-12-06 19:42:48,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:48,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:42:48,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:42:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:42:48,589 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 19:42:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:48,618 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-12-06 19:42:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:42:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-12-06 19:42:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:48,619 INFO L225 Difference]: With dead ends: 58 [2021-12-06 19:42:48,619 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 19:42:48,619 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 19:42:48,620 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:48,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 94 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 19:42:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 19:42:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 19:42:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-06 19:42:48,623 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2021-12-06 19:42:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:48,624 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-06 19:42:48,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 19:42:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-06 19:42:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 19:42:48,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:48,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:48,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:42:48,625 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:48,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1062174023, now seen corresponding path program 1 times [2021-12-06 19:42:48,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:48,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144332416] [2021-12-06 19:42:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:48,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:48,655 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 19:42:48,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:48,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144332416] [2021-12-06 19:42:48,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144332416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:48,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:48,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:42:48,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486660871] [2021-12-06 19:42:48,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:48,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:42:48,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:48,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:42:48,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:42:48,657 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 19:42:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:48,689 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-06 19:42:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:42:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 19:42:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:48,690 INFO L225 Difference]: With dead ends: 53 [2021-12-06 19:42:48,690 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 19:42:48,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:42:48,691 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:48,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 64 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 19:42:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 19:42:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) 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 19:42:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-06 19:42:48,694 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 15 [2021-12-06 19:42:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:48,694 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-06 19:42:48,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 19:42:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-06 19:42:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 19:42:48,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:48,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:48,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:42:48,696 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1062174024, now seen corresponding path program 1 times [2021-12-06 19:42:48,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:48,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285783469] [2021-12-06 19:42:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:48,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:48,746 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 19:42:48,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:48,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285783469] [2021-12-06 19:42:48,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285783469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:48,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:48,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:42:48,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168545004] [2021-12-06 19:42:48,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:48,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:42:48,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:42:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:42:48,747 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 19:42:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:48,804 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-12-06 19:42:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:42:48,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 19:42:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:48,805 INFO L225 Difference]: With dead ends: 53 [2021-12-06 19:42:48,805 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 19:42:48,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:42:48,806 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:48,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 70 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 19:42:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 19:42:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:42:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-12-06 19:42:48,810 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 15 [2021-12-06 19:42:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:48,810 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-12-06 19:42:48,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 19:42:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-12-06 19:42:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 19:42:48,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:48,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:48,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:42:48,811 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:48,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:48,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1452978584, now seen corresponding path program 1 times [2021-12-06 19:42:48,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:48,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189431013] [2021-12-06 19:42:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:48,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:48,837 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 19:42:48,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:48,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189431013] [2021-12-06 19:42:48,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189431013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:48,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:48,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:42:48,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120059138] [2021-12-06 19:42:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:48,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:42:48,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:42:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:42:48,839 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 19:42:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:48,864 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-12-06 19:42:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:42:48,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-06 19:42:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:48,865 INFO L225 Difference]: With dead ends: 52 [2021-12-06 19:42:48,865 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 19:42:48,865 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 19:42:48,866 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:48,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 66 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 19:42:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 19:42:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2826086956521738) 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 19:42:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-06 19:42:48,868 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 17 [2021-12-06 19:42:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:48,868 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-06 19:42:48,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 19:42:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-06 19:42:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 19:42:48,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:48,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:48,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:42:48,870 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:48,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1452978583, now seen corresponding path program 1 times [2021-12-06 19:42:48,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:48,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110856260] [2021-12-06 19:42:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:48,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:48,928 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 19:42:48,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110856260] [2021-12-06 19:42:48,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110856260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:48,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:48,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:42:48,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392649105] [2021-12-06 19:42:48,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:48,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:42:48,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:42:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:42:48,930 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 19:42:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:48,989 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-12-06 19:42:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:42:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-06 19:42:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:48,990 INFO L225 Difference]: With dead ends: 57 [2021-12-06 19:42:48,990 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 19:42:48,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:42:48,991 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:48,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 69 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 19:42:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-12-06 19:42:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:42:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-12-06 19:42:48,993 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-12-06 19:42:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:48,994 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-12-06 19:42:48,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 19:42:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-12-06 19:42:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 19:42:48,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:48,995 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 19:42:48,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:42:48,995 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:48,995 INFO L85 PathProgramCache]: Analyzing trace with hash -448353975, now seen corresponding path program 1 times [2021-12-06 19:42:48,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:48,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245807057] [2021-12-06 19:42:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:48,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:49,024 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 19:42:49,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245807057] [2021-12-06 19:42:49,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245807057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:49,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:49,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:42:49,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610926241] [2021-12-06 19:42:49,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:49,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:42:49,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:42:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:42:49,026 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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 19:42:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:49,054 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-12-06 19:42:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:42:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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 19:42:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:49,055 INFO L225 Difference]: With dead ends: 52 [2021-12-06 19:42:49,055 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 19:42:49,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:42:49,056 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:49,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 19:42:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-06 19:42:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) 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 19:42:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-06 19:42:49,059 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 19 [2021-12-06 19:42:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:49,059 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-06 19:42:49,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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 19:42:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-06 19:42:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 19:42:49,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:49,060 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 19:42:49,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:42:49,060 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash -448353974, now seen corresponding path program 1 times [2021-12-06 19:42:49,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:49,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114582747] [2021-12-06 19:42:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:49,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:49,138 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 19:42:49,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:49,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114582747] [2021-12-06 19:42:49,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114582747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:49,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:49,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:42:49,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767311825] [2021-12-06 19:42:49,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:49,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:42:49,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:42:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:42:49,140 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.375) 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 19:42:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:49,227 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-12-06 19:42:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:42:49,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) 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 19:42:49,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:49,228 INFO L225 Difference]: With dead ends: 60 [2021-12-06 19:42:49,228 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 19:42:49,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:42:49,229 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 130 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:49,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 100 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 19:42:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-12-06 19:42:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 19:42:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-06 19:42:49,232 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2021-12-06 19:42:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:49,232 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-06 19:42:49,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) 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 19:42:49,233 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-06 19:42:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 19:42:49,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:49,233 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] [2021-12-06 19:42:49,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:42:49,234 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 19:42:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1075479959, now seen corresponding path program 1 times [2021-12-06 19:42:49,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:49,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036008107] [2021-12-06 19:42:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:49,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:49,333 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 19:42:49,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:49,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036008107] [2021-12-06 19:42:49,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036008107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:49,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:49,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:42:49,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595061990] [2021-12-06 19:42:49,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:49,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:42:49,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:42:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:42:49,334 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 19:42:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:49,408 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-12-06 19:42:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:42:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-06 19:42:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:49,409 INFO L225 Difference]: With dead ends: 68 [2021-12-06 19:42:49,409 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 19:42:49,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:42:49,410 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:49,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 162 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 19:42:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-06 19:42:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 19:42:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-06 19:42:49,411 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2021-12-06 19:42:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:49,412 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-06 19:42:49,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 19:42:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-06 19:42:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 19:42:49,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:49,412 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] [2021-12-06 19:42:49,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 19:42:49,412 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1530543595, now seen corresponding path program 1 times [2021-12-06 19:42:49,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:49,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92973735] [2021-12-06 19:42:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:49,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:49,514 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 19:42:49,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:49,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92973735] [2021-12-06 19:42:49,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92973735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:49,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:49,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 19:42:49,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060875743] [2021-12-06 19:42:49,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:49,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:42:49,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:42:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:42:49,516 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 19:42:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:49,600 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-12-06 19:42:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:42:49,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-06 19:42:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:49,601 INFO L225 Difference]: With dead ends: 71 [2021-12-06 19:42:49,601 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 19:42:49,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:42:49,602 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:49,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 164 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 19:42:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-06 19:42:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 19:42:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-06 19:42:49,604 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2021-12-06 19:42:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:49,605 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-06 19:42:49,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 19:42:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-06 19:42:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 19:42:49,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:49,605 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, 1, 1] [2021-12-06 19:42:49,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 19:42:49,606 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1247746578, now seen corresponding path program 1 times [2021-12-06 19:42:49,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198567437] [2021-12-06 19:42:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:49,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:49,680 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 19:42:49,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198567437] [2021-12-06 19:42:49,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198567437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370375786] [2021-12-06 19:42:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:49,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:49,682 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:49,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:42:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 19:42:49,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:49,744 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 19:42:49,746 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 19:42:49,869 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 19:42:49,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:50,009 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 19:42:50,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370375786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:50,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:50,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2021-12-06 19:42:50,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817298689] [2021-12-06 19:42:50,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:50,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:42:50,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:50,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:42:50,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:42:50,011 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 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 19:42:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:50,176 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-12-06 19:42:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:42:50,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 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 25 [2021-12-06 19:42:50,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:50,177 INFO L225 Difference]: With dead ends: 65 [2021-12-06 19:42:50,177 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 19:42:50,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:42:50,178 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 166 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 154 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 19:42:50,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 154 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 19:42:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-12-06 19:42:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 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 19:42:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-06 19:42:50,180 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 25 [2021-12-06 19:42:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:50,181 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-06 19:42:50,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 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 19:42:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-06 19:42:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 19:42:50,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:50,181 INFO L514 BasicCegarLoop]: trace histogram [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 19:42:50,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:42:50,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 19:42:50,383 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:50,384 INFO L85 PathProgramCache]: Analyzing trace with hash -788585585, now seen corresponding path program 1 times [2021-12-06 19:42:50,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:50,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206713436] [2021-12-06 19:42:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:50,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:50,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:50,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206713436] [2021-12-06 19:42:50,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206713436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:50,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:50,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 19:42:50,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317661358] [2021-12-06 19:42:50,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:50,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:42:50,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:50,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:42:50,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:42:50,538 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 19:42:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:50,652 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-12-06 19:42:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:42:50,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 19:42:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:50,653 INFO L225 Difference]: With dead ends: 61 [2021-12-06 19:42:50,653 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 19:42:50,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:42:50,654 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:50,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 205 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 19:42:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-06 19:42:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 19:42:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-12-06 19:42:50,656 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 27 [2021-12-06 19:42:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:50,656 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-12-06 19:42:50,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 19:42:50,657 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-12-06 19:42:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 19:42:50,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:50,657 INFO L514 BasicCegarLoop]: trace histogram [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 19:42:50,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 19:42:50,658 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash -922599091, now seen corresponding path program 1 times [2021-12-06 19:42:50,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:50,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181383653] [2021-12-06 19:42:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:50,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:50,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:50,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181383653] [2021-12-06 19:42:50,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181383653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:50,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:42:50,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 19:42:50,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660193423] [2021-12-06 19:42:50,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:50,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:42:50,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:42:50,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:42:50,810 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 19:42:51,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:51,024 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-12-06 19:42:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:42:51,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 19:42:51,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:51,024 INFO L225 Difference]: With dead ends: 57 [2021-12-06 19:42:51,024 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 19:42:51,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:42:51,025 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:51,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 199 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:51,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 19:42:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-12-06 19:42:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:42:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-06 19:42:51,027 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2021-12-06 19:42:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:51,027 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-06 19:42:51,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 19:42:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-06 19:42:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 19:42:51,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:51,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:51,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 19:42:51,028 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash 904511312, now seen corresponding path program 1 times [2021-12-06 19:42:51,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:51,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459368648] [2021-12-06 19:42:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:51,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:51,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:51,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459368648] [2021-12-06 19:42:51,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459368648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:51,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125534707] [2021-12-06 19:42:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:51,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:51,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:51,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:51,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:42:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:51,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:42:51,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:51,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:51,384 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 19:42:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:51,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125534707] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:51,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:51,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-06 19:42:51,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387384036] [2021-12-06 19:42:51,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:51,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:42:51,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:42:51,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:42:51,406 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 19:42:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:51,619 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-12-06 19:42:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:42:51,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 19:42:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:51,620 INFO L225 Difference]: With dead ends: 50 [2021-12-06 19:42:51,620 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 19:42:51,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:42:51,621 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:51,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 179 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 19:42:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-06 19:42:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:42:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-12-06 19:42:51,623 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 31 [2021-12-06 19:42:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:51,624 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-12-06 19:42:51,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 19:42:51,624 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-12-06 19:42:51,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 19:42:51,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:51,625 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, 1, 1] [2021-12-06 19:42:51,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:42:51,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 19:42:51,826 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1651977841, now seen corresponding path program 1 times [2021-12-06 19:42:51,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:51,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460205701] [2021-12-06 19:42:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:51,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:42:51,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460205701] [2021-12-06 19:42:51,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460205701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720493575] [2021-12-06 19:42:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:51,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:51,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:51,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:42:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 19:42:51,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:51,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:42:51,957 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 19:42:51,960 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 19:42:52,081 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 19:42:52,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:52,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720493575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:52,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:52,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2021-12-06 19:42:52,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851916465] [2021-12-06 19:42:52,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:52,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:42:52,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:42:52,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:42:52,248 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:42:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:52,446 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-12-06 19:42:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:42:52,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 19:42:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:52,447 INFO L225 Difference]: With dead ends: 52 [2021-12-06 19:42:52,447 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 19:42:52,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:42:52,448 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 109 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:52,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 186 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 19:42:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-12-06 19:42:52,449 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 19:42:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-06 19:42:52,449 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 33 [2021-12-06 19:42:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:52,450 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-06 19:42:52,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:42:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-06 19:42:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 19:42:52,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:52,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:52,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:42:52,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 19:42:52,651 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:52,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1587501230, now seen corresponding path program 1 times [2021-12-06 19:42:52,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:52,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524127703] [2021-12-06 19:42:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:52,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:52,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524127703] [2021-12-06 19:42:52,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524127703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:52,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833744288] [2021-12-06 19:42:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:52,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:52,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:52,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:52,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:42:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 19:42:52,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:52,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:52,994 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 19:42:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:53,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833744288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:53,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:53,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2021-12-06 19:42:53,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213061207] [2021-12-06 19:42:53,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:53,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:42:53,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:53,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:42:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:42:53,019 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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 19:42:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:53,153 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-12-06 19:42:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:42:53,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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) Word has length 35 [2021-12-06 19:42:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:53,154 INFO L225 Difference]: With dead ends: 59 [2021-12-06 19:42:53,154 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 19:42:53,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:42:53,155 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 112 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:53,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 199 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 19:42:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-12-06 19:42:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 19:42:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-12-06 19:42:53,156 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2021-12-06 19:42:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:53,156 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-12-06 19:42:53,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 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 19:42:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-12-06 19:42:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 19:42:53,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:53,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:53,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:42:53,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:53,359 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 19:42:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash -579332495, now seen corresponding path program 1 times [2021-12-06 19:42:53,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:53,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547707634] [2021-12-06 19:42:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:53,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:53,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:53,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547707634] [2021-12-06 19:42:53,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547707634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:53,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403158073] [2021-12-06 19:42:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:53,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:53,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:53,584 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:53,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:42:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:53,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 19:42:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:53,755 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 19:42:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:42:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:42:54,326 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 19:42:54,327 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 29 treesize of output 13 [2021-12-06 19:42:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:54,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:54,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:54,650 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 103 treesize of output 103 [2021-12-06 19:42:54,673 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 40 treesize of output 36 [2021-12-06 19:42:54,695 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 3 [2021-12-06 19:42:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:42:54,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403158073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:54,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:54,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2021-12-06 19:42:54,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607922616] [2021-12-06 19:42:54,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:54,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 19:42:54,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:54,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 19:42:54,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 19:42:54,892 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:42:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:55,513 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2021-12-06 19:42:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 19:42:55,513 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 19:42:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:55,514 INFO L225 Difference]: With dead ends: 124 [2021-12-06 19:42:55,514 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 19:42:55,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=416, Invalid=3490, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 19:42:55,515 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:55,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 451 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 207 Invalid, 0 Unknown, 202 Unchecked, 0.1s Time] [2021-12-06 19:42:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 19:42:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-12-06 19:42:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 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 19:42:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-06 19:42:55,517 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 37 [2021-12-06 19:42:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:55,517 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-06 19:42:55,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:42:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-06 19:42:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:42:55,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:55,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:55,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 19:42:55,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 19:42:55,719 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash -491067849, now seen corresponding path program 2 times [2021-12-06 19:42:55,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:55,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201051643] [2021-12-06 19:42:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:55,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:55,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201051643] [2021-12-06 19:42:55,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201051643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104457240] [2021-12-06 19:42:55,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:42:55,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:55,842 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:55,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:42:55,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:42:55,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:42:55,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 19:42:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:56,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:56,157 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 19:42:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:56,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104457240] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:56,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:56,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 19:42:56,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69239177] [2021-12-06 19:42:56,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:56,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:42:56,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:42:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:42:56,184 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 19:42:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:56,327 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-12-06 19:42:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:42:56,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 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 45 [2021-12-06 19:42:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:56,328 INFO L225 Difference]: With dead ends: 67 [2021-12-06 19:42:56,328 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 19:42:56,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-06 19:42:56,329 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 198 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:56,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 181 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 19:42:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-12-06 19:42:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 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 19:42:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-12-06 19:42:56,331 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 45 [2021-12-06 19:42:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:56,332 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-12-06 19:42:56,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 19:42:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-12-06 19:42:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 19:42:56,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:56,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:56,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 19:42:56,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 19:42:56,534 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:56,535 INFO L85 PathProgramCache]: Analyzing trace with hash 530199960, now seen corresponding path program 2 times [2021-12-06 19:42:56,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:56,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033877762] [2021-12-06 19:42:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:56,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:56,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:56,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033877762] [2021-12-06 19:42:56,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033877762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:56,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639481416] [2021-12-06 19:42:56,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:42:56,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:56,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:56,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:56,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:42:56,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:42:56,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:42:56,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:42:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:56,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:57,001 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 19:42:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:57,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639481416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:57,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:57,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-12-06 19:42:57,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836841164] [2021-12-06 19:42:57,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:57,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 19:42:57,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 19:42:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:42:57,028 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 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 19:42:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:57,235 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-12-06 19:42:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:42:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 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) Word has length 47 [2021-12-06 19:42:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:57,236 INFO L225 Difference]: With dead ends: 62 [2021-12-06 19:42:57,236 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 19:42:57,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:42:57,237 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 219 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:57,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 167 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:42:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 19:42:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-12-06 19:42:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 19:42:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-12-06 19:42:57,240 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2021-12-06 19:42:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:57,240 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-12-06 19:42:57,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 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 19:42:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-12-06 19:42:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:42:57,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:57,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:42:57,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:42:57,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:57,442 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:57,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1243825766, now seen corresponding path program 2 times [2021-12-06 19:42:57,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:57,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515150712] [2021-12-06 19:42:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:57,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:57,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:57,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515150712] [2021-12-06 19:42:57,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515150712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:57,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117514106] [2021-12-06 19:42:57,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:42:57,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:57,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:57,566 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:57,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:42:57,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:42:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:42:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:42:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 19:42:57,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:42:57,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117514106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:42:57,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:42:57,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 19:42:57,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075059681] [2021-12-06 19:42:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:42:57,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:42:57,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:57,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:42:57,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:42:57,673 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 19:42:57,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:42:57,701 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-12-06 19:42:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:42:57,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 51 [2021-12-06 19:42:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:42:57,702 INFO L225 Difference]: With dead ends: 60 [2021-12-06 19:42:57,702 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 19:42:57,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:42:57,703 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:42:57,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 84 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:42:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 19:42:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-06 19:42:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 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 19:42:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-12-06 19:42:57,704 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2021-12-06 19:42:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:42:57,705 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-12-06 19:42:57,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 19:42:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-12-06 19:42:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 19:42:57,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:42:57,705 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-12-06 19:42:57,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:42:57,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 19:42:57,907 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:42:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:42:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1019693383, now seen corresponding path program 3 times [2021-12-06 19:42:57,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:42:57,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690658265] [2021-12-06 19:42:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:42:57,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:42:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:42:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:58,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:42:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690658265] [2021-12-06 19:42:58,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690658265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:42:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345684509] [2021-12-06 19:42:58,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:42:58,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:42:58,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:42:58,088 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:42:58,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:42:58,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:42:58,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:42:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 19:42:58,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:42:58,177 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:42:58,177 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 19:42:58,298 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 19:42:58,593 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 13 treesize of output 9 [2021-12-06 19:42:58,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:42:58,706 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-06 19:42:58,706 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 28 treesize of output 13 [2021-12-06 19:42:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:58,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:42:59,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:42:59,349 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 19:42:59,357 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 19:42:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:42:59,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345684509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:42:59,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:42:59,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 18] total 42 [2021-12-06 19:42:59,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328325400] [2021-12-06 19:42:59,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:42:59,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 19:42:59,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:42:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 19:42:59,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1576, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 19:42:59,690 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 19:43:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:00,509 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2021-12-06 19:43:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 19:43:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 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 19:43:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:00,510 INFO L225 Difference]: With dead ends: 164 [2021-12-06 19:43:00,510 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 19:43:00,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=538, Invalid=4864, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 19:43:00,512 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:00,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 424 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 269 Invalid, 0 Unknown, 228 Unchecked, 0.1s Time] [2021-12-06 19:43:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 19:43:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-12-06 19:43:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 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 19:43:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-12-06 19:43:00,514 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 53 [2021-12-06 19:43:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:00,514 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-12-06 19:43:00,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 19:43:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-12-06 19:43:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 19:43:00,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:00,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:00,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:43:00,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 19:43:00,716 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 19:43:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2077042049, now seen corresponding path program 4 times [2021-12-06 19:43:00,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:00,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436505994] [2021-12-06 19:43:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:00,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:00,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:00,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436505994] [2021-12-06 19:43:00,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436505994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:00,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485215031] [2021-12-06 19:43:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:43:00,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:00,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:00,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:00,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:43:00,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:43:00,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:00,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 19:43:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:01,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:01,246 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 19:43:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:01,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485215031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:01,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:01,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-12-06 19:43:01,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753811581] [2021-12-06 19:43:01,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:01,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 19:43:01,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 19:43:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-12-06 19:43:01,281 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 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 19:43:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:01,488 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-12-06 19:43:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:43:01,488 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 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) Word has length 61 [2021-12-06 19:43:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:01,489 INFO L225 Difference]: With dead ends: 75 [2021-12-06 19:43:01,489 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 19:43:01,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:43:01,489 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 280 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:01,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 265 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:43:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 19:43:01,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-12-06 19:43:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0579710144927537) 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 19:43:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-12-06 19:43:01,491 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2021-12-06 19:43:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:01,491 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-12-06 19:43:01,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 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 19:43:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-12-06 19:43:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 19:43:01,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:01,492 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:01,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:43:01,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:01,692 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:43:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:01,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1122383840, now seen corresponding path program 3 times [2021-12-06 19:43:01,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:01,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23590780] [2021-12-06 19:43:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:01,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:01,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:01,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23590780] [2021-12-06 19:43:01,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23590780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86271095] [2021-12-06 19:43:01,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:43:01,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:01,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:01,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:01,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:43:01,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:43:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:01,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 19:43:01,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:01,935 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:43:01,936 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 19:43:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:02,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:02,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86271095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:02,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:02,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-12-06 19:43:02,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873090400] [2021-12-06 19:43:02,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:02,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 19:43:02,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 19:43:02,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 19:43:02,511 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 36 states, 35 states have (on average 4.485714285714286) internal successors, (157), 36 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 19:43:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:02,818 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-12-06 19:43:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:43:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.485714285714286) internal successors, (157), 36 states have internal predecessors, (157), 0 states have call successors, (0), 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 63 [2021-12-06 19:43:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:02,819 INFO L225 Difference]: With dead ends: 74 [2021-12-06 19:43:02,819 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 19:43:02,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=420, Invalid=1650, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 19:43:02,820 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 249 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:02,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 299 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:43:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 19:43:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-12-06 19:43:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 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 19:43:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-12-06 19:43:02,822 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 63 [2021-12-06 19:43:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:02,822 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-12-06 19:43:02,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.485714285714286) internal successors, (157), 36 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 19:43:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-12-06 19:43:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 19:43:02,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:02,823 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1] [2021-12-06 19:43:02,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 19:43:03,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:03,024 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 19:43:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -356785407, now seen corresponding path program 5 times [2021-12-06 19:43:03,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:03,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809099592] [2021-12-06 19:43:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:03,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:03,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809099592] [2021-12-06 19:43:03,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809099592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198639299] [2021-12-06 19:43:03,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:43:03,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:03,259 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:03,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:43:03,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 19:43:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 19:43:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:03,607 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:43:03,607 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 19:43:03,615 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 19:43:03,853 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 19:43:03,888 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 19:43:04,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:43:04,262 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:43:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:04,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:04,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:43:04,634 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 19:43:04,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:43:04,638 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 19:43:04,640 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 19:43:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:43:05,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198639299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:05,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:05,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2021-12-06 19:43:05,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236606428] [2021-12-06 19:43:05,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:05,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 19:43:05,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 19:43:05,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1791, Unknown=2, NotChecked=0, Total=1980 [2021-12-06 19:43:05,043 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 45 states, 45 states have (on average 3.8222222222222224) internal successors, (172), 45 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 19:43:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:05,347 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2021-12-06 19:43:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 19:43:05,348 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8222222222222224) internal successors, (172), 45 states have internal predecessors, (172), 0 states have call successors, (0), 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 69 [2021-12-06 19:43:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:05,348 INFO L225 Difference]: With dead ends: 134 [2021-12-06 19:43:05,348 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 19:43:05,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=2296, Unknown=2, NotChecked=0, Total=2550 [2021-12-06 19:43:05,349 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:05,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 718 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 364 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2021-12-06 19:43:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 19:43:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-12-06 19:43:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.0493827160493827) 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 19:43:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-12-06 19:43:05,351 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 69 [2021-12-06 19:43:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:05,351 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-12-06 19:43:05,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8222222222222224) internal successors, (172), 45 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 19:43:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-12-06 19:43:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:43:05,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:05,352 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:05,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:43:05,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:05,554 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:43:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:05,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1038706139, now seen corresponding path program 4 times [2021-12-06 19:43:05,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:05,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297788915] [2021-12-06 19:43:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:05,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:43:05,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297788915] [2021-12-06 19:43:05,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297788915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104332762] [2021-12-06 19:43:05,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:43:05,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:05,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:05,973 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:05,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:43:06,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:43:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 19:43:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:06,076 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:43:06,076 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 19:43:06,260 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 19:43:06,651 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 13 treesize of output 9 [2021-12-06 19:43:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:43:06,782 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-06 19:43:06,783 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 28 treesize of output 13 [2021-12-06 19:43:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 46 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:43:06,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:09,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:43:09,618 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 99 treesize of output 99 [2021-12-06 19:43:09,628 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 34 treesize of output 32 [2021-12-06 19:43:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:43:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104332762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:10,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:10,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 22] total 60 [2021-12-06 19:43:10,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128232854] [2021-12-06 19:43:10,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:10,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 19:43:10,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 19:43:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3307, Unknown=1, NotChecked=0, Total=3540 [2021-12-06 19:43:10,168 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 60 states, 60 states have (on average 3.0) internal successors, (180), 60 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 19:43:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:11,123 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2021-12-06 19:43:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:43:11,123 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.0) internal successors, (180), 60 states have internal predecessors, (180), 0 states have call successors, (0), 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 75 [2021-12-06 19:43:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:11,124 INFO L225 Difference]: With dead ends: 127 [2021-12-06 19:43:11,124 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 19:43:11,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=623, Invalid=7386, Unknown=1, NotChecked=0, Total=8010 [2021-12-06 19:43:11,126 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 112 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:11,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 819 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 568 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2021-12-06 19:43:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 19:43:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2021-12-06 19:43:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 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 19:43:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-12-06 19:43:11,128 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 75 [2021-12-06 19:43:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:11,128 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-12-06 19:43:11,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.0) internal successors, (180), 60 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 19:43:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-12-06 19:43:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 19:43:11,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:11,129 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1] [2021-12-06 19:43:11,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:43:11,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 19:43:11,330 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:43:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1978254888, now seen corresponding path program 5 times [2021-12-06 19:43:11,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:11,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412359107] [2021-12-06 19:43:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:11,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:43:11,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:11,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412359107] [2021-12-06 19:43:11,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412359107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:11,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555301610] [2021-12-06 19:43:11,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:43:11,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:11,534 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:11,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:43:12,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 19:43:12,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:12,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 19:43:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:12,034 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:43:12,034 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 19:43:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:43:12,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:43:12,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555301610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:12,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:12,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2021-12-06 19:43:12,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897012824] [2021-12-06 19:43:12,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:12,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 19:43:12,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:12,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 19:43:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 19:43:12,794 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 42 states, 41 states have (on average 4.7073170731707314) internal successors, (193), 42 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 19:43:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:13,120 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-12-06 19:43:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:43:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.7073170731707314) internal successors, (193), 42 states have internal predecessors, (193), 0 states have call successors, (0), 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 19:43:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:13,121 INFO L225 Difference]: With dead ends: 90 [2021-12-06 19:43:13,121 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 19:43:13,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 19:43:13,122 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 363 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:13,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 345 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:43:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 19:43:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-12-06 19:43:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:43:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-12-06 19:43:13,124 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 79 [2021-12-06 19:43:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:13,124 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-12-06 19:43:13,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.7073170731707314) internal successors, (193), 42 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 19:43:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-12-06 19:43:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 19:43:13,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:13,125 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1] [2021-12-06 19:43:13,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:43:13,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 19:43:13,326 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 19:43:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash 622697289, now seen corresponding path program 6 times [2021-12-06 19:43:13,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:13,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978140239] [2021-12-06 19:43:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:13,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:43:13,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:13,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978140239] [2021-12-06 19:43:13,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978140239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:13,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467589214] [2021-12-06 19:43:13,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:43:13,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:13,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:13,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:13,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:43:13,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 19:43:13,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:13,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-06 19:43:13,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:13,944 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 19:43:14,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:43:14,605 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 19:43:14,605 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 28 treesize of output 13 [2021-12-06 19:43:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:43:14,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:46,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:43:46,137 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 103 treesize of output 103 [2021-12-06 19:43:46,153 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 40 treesize of output 36 [2021-12-06 19:43:46,171 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 3 [2021-12-06 19:43:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:43:46,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467589214] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:46,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:46,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 24] total 60 [2021-12-06 19:43:46,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231059315] [2021-12-06 19:43:46,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:46,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 19:43:46,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 19:43:46,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3326, Unknown=43, NotChecked=0, Total=3540 [2021-12-06 19:43:46,419 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 60 states, 60 states have (on average 3.3666666666666667) internal successors, (202), 60 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 19:43:47,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:47,733 INFO L93 Difference]: Finished difference Result 251 states and 256 transitions. [2021-12-06 19:43:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 19:43:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.3666666666666667) internal successors, (202), 60 states have internal predecessors, (202), 0 states have call successors, (0), 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 85 [2021-12-06 19:43:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:47,734 INFO L225 Difference]: With dead ends: 251 [2021-12-06 19:43:47,734 INFO L226 Difference]: Without dead ends: 103 [2021-12-06 19:43:47,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=524, Invalid=9333, Unknown=43, NotChecked=0, Total=9900 [2021-12-06 19:43:47,737 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 162 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:47,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1143 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 831 Invalid, 0 Unknown, 519 Unchecked, 0.2s Time] [2021-12-06 19:43:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-06 19:43:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2021-12-06 19:43:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:43:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-12-06 19:43:47,739 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 85 [2021-12-06 19:43:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:47,739 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-12-06 19:43:47,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.3666666666666667) internal successors, (202), 60 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 19:43:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-12-06 19:43:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 19:43:47,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:47,740 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1] [2021-12-06 19:43:47,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:43:47,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 19:43:47,941 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:43:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1086220047, now seen corresponding path program 7 times [2021-12-06 19:43:47,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:47,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118056771] [2021-12-06 19:43:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:47,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:48,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:48,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118056771] [2021-12-06 19:43:48,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118056771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:48,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91430134] [2021-12-06 19:43:48,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:43:48,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:48,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:48,148 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:48,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:43:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 19:43:48,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:48,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:48,700 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 5 treesize of output 3 [2021-12-06 19:43:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:48,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91430134] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:48,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:48,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-06 19:43:48,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556974336] [2021-12-06 19:43:48,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:48,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:43:48,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:48,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:43:48,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:43:48,756 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 19:43:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:49,075 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-12-06 19:43:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:43:49,075 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 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 93 [2021-12-06 19:43:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:49,076 INFO L225 Difference]: With dead ends: 107 [2021-12-06 19:43:49,076 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 19:43:49,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 19:43:49,076 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 590 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:49,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 465 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:43:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 19:43:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-12-06 19:43:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:43:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-12-06 19:43:49,079 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 93 [2021-12-06 19:43:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:49,079 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-12-06 19:43:49,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 19:43:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-12-06 19:43:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:43:49,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:49,080 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1] [2021-12-06 19:43:49,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:43:49,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 19:43:49,281 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:43:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 180412528, now seen corresponding path program 6 times [2021-12-06 19:43:49,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:49,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171967581] [2021-12-06 19:43:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:49,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:49,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:49,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171967581] [2021-12-06 19:43:49,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171967581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:49,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742688369] [2021-12-06 19:43:49,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:43:49,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:49,512 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:49,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:43:49,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 19:43:49,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:49,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 19:43:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:49,788 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:43:49,788 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 19:43:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:50,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:50,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742688369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:50,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:50,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2021-12-06 19:43:50,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736369181] [2021-12-06 19:43:50,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:50,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 19:43:50,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 19:43:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 19:43:50,706 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 47 states, 46 states have (on average 4.978260869565218) internal successors, (229), 47 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:43:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:51,349 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-12-06 19:43:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 19:43:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.978260869565218) internal successors, (229), 47 states have internal predecessors, (229), 0 states have call successors, (0), 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 95 [2021-12-06 19:43:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:51,350 INFO L225 Difference]: With dead ends: 106 [2021-12-06 19:43:51,350 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 19:43:51,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=829, Invalid=3331, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 19:43:51,351 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 439 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:51,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 387 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:43:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 19:43:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-12-06 19:43:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 1.0388349514563107) 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 19:43:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-12-06 19:43:51,353 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2021-12-06 19:43:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:51,353 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-12-06 19:43:51,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.978260869565218) internal successors, (229), 47 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:43:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-12-06 19:43:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 19:43:51,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:51,354 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1] [2021-12-06 19:43:51,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 19:43:51,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 19:43:51,555 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:43:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1082531951, now seen corresponding path program 8 times [2021-12-06 19:43:51,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:51,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378018467] [2021-12-06 19:43:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:51,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:51,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378018467] [2021-12-06 19:43:51,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378018467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287882582] [2021-12-06 19:43:51,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:43:51,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:51,831 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:51,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:43:51,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:43:51,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:51,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-06 19:43:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:52,147 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 19:43:52,718 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 19:43:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:52,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:55,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:43:55,328 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 103 treesize of output 103 [2021-12-06 19:43:55,354 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 40 treesize of output 36 [2021-12-06 19:43:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:43:55,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287882582] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:55,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:55,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 27] total 61 [2021-12-06 19:43:55,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925541647] [2021-12-06 19:43:55,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:55,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 19:43:55,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 19:43:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3474, Unknown=1, NotChecked=0, Total=3660 [2021-12-06 19:43:55,620 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 61 states, 61 states have (on average 3.8852459016393444) internal successors, (237), 61 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 19:43:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:57,121 INFO L93 Difference]: Finished difference Result 294 states and 299 transitions. [2021-12-06 19:43:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 19:43:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.8852459016393444) internal successors, (237), 61 states have internal predecessors, (237), 0 states have call successors, (0), 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 101 [2021-12-06 19:43:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:57,123 INFO L225 Difference]: With dead ends: 294 [2021-12-06 19:43:57,123 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 19:43:57,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=543, Invalid=9356, Unknown=1, NotChecked=0, Total=9900 [2021-12-06 19:43:57,124 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 196 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:57,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1342 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1230 Invalid, 0 Unknown, 391 Unchecked, 0.3s Time] [2021-12-06 19:43:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 19:43:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2021-12-06 19:43:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:43:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2021-12-06 19:43:57,126 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 101 [2021-12-06 19:43:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:57,126 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2021-12-06 19:43:57,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.8852459016393444) internal successors, (237), 61 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 19:43:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2021-12-06 19:43:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 19:43:57,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:57,127 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:57,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 19:43:57,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 19:43:57,328 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 19:43:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash 705298263, now seen corresponding path program 9 times [2021-12-06 19:43:57,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:57,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299632205] [2021-12-06 19:43:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:57,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:43:57,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:57,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299632205] [2021-12-06 19:43:57,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299632205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:43:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616923850] [2021-12-06 19:43:57,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:43:57,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:57,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:43:57,497 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:43:57,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 19:43:57,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 19:43:57,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:43:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 19:43:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:43:57,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:43:57,923 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 19:43:57,925 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 19:43:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:43:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:43:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 66 proven. 126 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:43:58,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616923850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:43:58,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:43:58,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 47 [2021-12-06 19:43:58,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255234233] [2021-12-06 19:43:58,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:43:58,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 19:43:58,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 19:43:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 19:43:58,991 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 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 19:43:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:59,747 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2021-12-06 19:43:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 19:43:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 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 19:43:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:59,748 INFO L225 Difference]: With dead ends: 123 [2021-12-06 19:43:59,748 INFO L226 Difference]: Without dead ends: 123 [2021-12-06 19:43:59,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=942, Invalid=3750, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 19:43:59,749 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 585 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:43:59,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 563 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:43:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-06 19:43:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2021-12-06 19:43:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:43:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-12-06 19:43:59,751 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 109 [2021-12-06 19:43:59,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:59,751 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-12-06 19:43:59,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.51063829787234) internal successors, (259), 48 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 19:43:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-12-06 19:43:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 19:43:59,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:59,752 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:59,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 19:43:59,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:43:59,953 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:43:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash -813201736, now seen corresponding path program 7 times [2021-12-06 19:43:59,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:59,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755666005] [2021-12-06 19:43:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:59,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:44:00,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755666005] [2021-12-06 19:44:00,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755666005] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119254221] [2021-12-06 19:44:00,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:44:00,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:00,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:00,207 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:00,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 19:44:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:00,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 19:44:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:44:00,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:00,825 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 19:44:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:44:00,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119254221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:00,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:44:00,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 39 [2021-12-06 19:44:00,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679111180] [2021-12-06 19:44:00,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:00,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 19:44:00,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:00,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 19:44:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 19:44:00,870 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 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 19:44:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:01,319 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-12-06 19:44:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:44:01,320 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 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 111 [2021-12-06 19:44:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:01,320 INFO L225 Difference]: With dead ends: 122 [2021-12-06 19:44:01,320 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 19:44:01,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=2491, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 19:44:01,321 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 388 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:01,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 560 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:44:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 19:44:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-12-06 19:44:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2021-12-06 19:44:01,323 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 111 [2021-12-06 19:44:01,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:01,323 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2021-12-06 19:44:01,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.717948717948718) internal successors, (184), 40 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 19:44:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2021-12-06 19:44:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 19:44:01,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:01,324 INFO L514 BasicCegarLoop]: trace histogram [7, 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, 1] [2021-12-06 19:44:01,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 19:44:01,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:01,525 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:44:01,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:01,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2098417703, now seen corresponding path program 10 times [2021-12-06 19:44:01,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:01,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629384124] [2021-12-06 19:44:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:01,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:44:01,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:01,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629384124] [2021-12-06 19:44:01,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629384124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:01,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158756012] [2021-12-06 19:44:01,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:44:01,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:01,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:01,826 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:01,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 19:44:01,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:44:01,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:01,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 19:44:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:01,994 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:44:01,994 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 19:44:02,283 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 19:44:16,483 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 13 treesize of output 9 [2021-12-06 19:44:16,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:44:16,676 INFO L354 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2021-12-06 19:44:16,676 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 29 treesize of output 13 [2021-12-06 19:44:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 121 proven. 90 refuted. 30 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:44:16,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:20,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:44:20,059 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 99 treesize of output 99 [2021-12-06 19:44:20,076 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 34 treesize of output 32 [2021-12-06 19:44:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:44:20,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158756012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:20,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:44:20,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 30] total 68 [2021-12-06 19:44:20,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136453249] [2021-12-06 19:44:20,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:20,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 19:44:20,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:20,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 19:44:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=4209, Unknown=5, NotChecked=0, Total=4556 [2021-12-06 19:44:20,840 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 68 states, 68 states have (on average 4.029411764705882) internal successors, (274), 68 states have internal predecessors, (274), 0 states have call successors, (0), 0 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 19:44:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:38,523 INFO L93 Difference]: Finished difference Result 340 states and 344 transitions. [2021-12-06 19:44:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 19:44:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.029411764705882) internal successors, (274), 68 states have internal predecessors, (274), 0 states have call successors, (0), 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 19:44:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:38,524 INFO L225 Difference]: With dead ends: 340 [2021-12-06 19:44:38,524 INFO L226 Difference]: Without dead ends: 135 [2021-12-06 19:44:38,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 199 SyntacticMatches, 10 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3205 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=1101, Invalid=11546, Unknown=9, NotChecked=0, Total=12656 [2021-12-06 19:44:38,525 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 262 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:38,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 1102 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 656 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2021-12-06 19:44:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-06 19:44:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2021-12-06 19:44:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.031496062992126) internal successors, (131), 128 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 19:44:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2021-12-06 19:44:38,528 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 117 [2021-12-06 19:44:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:38,528 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2021-12-06 19:44:38,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.029411764705882) internal successors, (274), 68 states have internal predecessors, (274), 0 states have call successors, (0), 0 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 19:44:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2021-12-06 19:44:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 19:44:38,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:38,529 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-12-06 19:44:38,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 19:44:38,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:38,730 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 19:44:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:38,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1926505375, now seen corresponding path program 11 times [2021-12-06 19:44:38,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:38,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915564587] [2021-12-06 19:44:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:38,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:39,003 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 19:44:39,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915564587] [2021-12-06 19:44:39,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915564587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414044094] [2021-12-06 19:44:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:44:39,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:39,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:39,004 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:39,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 19:44:39,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 19:44:39,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:39,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 19:44:39,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:44:39,856 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 19:44:39,858 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 19:44:40,451 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 19:44:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 91 proven. 175 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 19:44:41,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414044094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:41,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:44:41,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 49 [2021-12-06 19:44:41,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858217552] [2021-12-06 19:44:41,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:41,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 19:44:41,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 19:44:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:44:41,136 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 50 states, 49 states have (on average 5.8979591836734695) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 19:44:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:41,647 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2021-12-06 19:44:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 19:44:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 5.8979591836734695) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 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 125 [2021-12-06 19:44:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:41,648 INFO L225 Difference]: With dead ends: 139 [2021-12-06 19:44:41,648 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 19:44:41,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=651, Invalid=3131, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 19:44:41,649 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 408 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:41,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 603 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:44:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 19:44:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2021-12-06 19:44:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 19:44:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-12-06 19:44:41,651 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 125 [2021-12-06 19:44:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:41,651 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-12-06 19:44:41,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 5.8979591836734695) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 19:44:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-12-06 19:44:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 19:44:41,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:41,652 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 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] [2021-12-06 19:44:41,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:41,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 19:44:41,853 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:44:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash 240761088, now seen corresponding path program 8 times [2021-12-06 19:44:41,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:41,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117889406] [2021-12-06 19:44:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:41,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 45 proven. 235 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 19:44:42,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:42,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117889406] [2021-12-06 19:44:42,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117889406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:42,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801366323] [2021-12-06 19:44:42,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:44:42,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:42,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:42,153 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 19:44:42,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:44:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:42,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 19:44:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:42,276 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:44:42,276 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 19:44:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 66 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 19:44:43,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 91 proven. 189 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 19:44:43,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801366323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:43,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:44:43,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2021-12-06 19:44:43,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176098843] [2021-12-06 19:44:43,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:43,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 19:44:43,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:43,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 19:44:43,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=3056, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 19:44:43,825 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 59 states, 58 states have (on average 5.189655172413793) internal successors, (301), 59 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 19:44:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:44,791 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-12-06 19:44:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 19:44:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 5.189655172413793) internal successors, (301), 59 states have internal predecessors, (301), 0 states have call successors, (0), 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 127 [2021-12-06 19:44:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:44,792 INFO L225 Difference]: With dead ends: 138 [2021-12-06 19:44:44,792 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 19:44:44,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1240, Invalid=5566, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 19:44:44,793 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 445 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:44,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 697 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:44:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 19:44:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-06 19:44:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-12-06 19:44:44,795 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 127 [2021-12-06 19:44:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:44,795 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-12-06 19:44:44,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 5.189655172413793) internal successors, (301), 59 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 19:44:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-12-06 19:44:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 19:44:44,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:44,796 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:44,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 19:44:44,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 19:44:44,997 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:44:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:44,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1265497055, now seen corresponding path program 12 times [2021-12-06 19:44:44,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:44,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652720435] [2021-12-06 19:44:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:45,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 19:44:45,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652720435] [2021-12-06 19:44:45,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652720435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149464264] [2021-12-06 19:44:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:44:45,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:45,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:45,388 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:45,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 19:44:46,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 19:44:46,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:46,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 19:44:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:46,200 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:44:46,201 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 19:44:46,630 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 19:44:46,683 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-12-06 19:44:46,684 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 24 treesize of output 23 [2021-12-06 19:44:46,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:44:46,873 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 21 treesize of output 21 [2021-12-06 19:44:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 19:44:46,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:47,617 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 46 treesize of output 42 [2021-12-06 19:44:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 19:44:49,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149464264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:49,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:44:49,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8, 8] total 37 [2021-12-06 19:44:49,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337818618] [2021-12-06 19:44:49,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:49,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 19:44:49,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:49,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 19:44:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:44:49,270 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 19:44:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:51,006 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-12-06 19:44:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 19:44:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 states have internal predecessors, (169), 0 states have call successors, (0), 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 133 [2021-12-06 19:44:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:51,007 INFO L225 Difference]: With dead ends: 239 [2021-12-06 19:44:51,007 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 19:44:51,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=638, Invalid=5682, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 19:44:51,007 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 124 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:51,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 921 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1653 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2021-12-06 19:44:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 19:44:51,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-12-06 19:44:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 19:44:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2021-12-06 19:44:51,010 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2021-12-06 19:44:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:51,010 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2021-12-06 19:44:51,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 19:44:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2021-12-06 19:44:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 19:44:51,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:51,010 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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, 1] [2021-12-06 19:44:51,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 19:44:51,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 19:44:51,212 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:44:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1402168133, now seen corresponding path program 9 times [2021-12-06 19:44:51,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:51,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620535461] [2021-12-06 19:44:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:51,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:52,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:52,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620535461] [2021-12-06 19:44:52,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620535461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:52,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389265543] [2021-12-06 19:44:52,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:44:52,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:52,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:52,083 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:52,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 19:44:52,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 19:44:52,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-06 19:44:52,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:53,001 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 19:44:53,280 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 19:44:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 301 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:44:53,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:53,666 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 19:44:53,667 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 19:44:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 38 proven. 301 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:44:53,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389265543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:53,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:44:53,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26, 27] total 60 [2021-12-06 19:44:53,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064131022] [2021-12-06 19:44:53,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:53,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 19:44:53,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:53,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 19:44:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3359, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 19:44:53,863 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 60 states, 60 states have (on average 3.55) internal successors, (213), 60 states have internal predecessors, (213), 0 states have call successors, (0), 0 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 19:44:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:55,908 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2021-12-06 19:44:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 19:44:55,908 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.55) internal successors, (213), 60 states have internal predecessors, (213), 0 states have call successors, (0), 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 19:44:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:55,909 INFO L225 Difference]: With dead ends: 216 [2021-12-06 19:44:55,909 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 19:44:55,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 258 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=655, Invalid=7901, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 19:44:55,910 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 289 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 3503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:55,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1933 Invalid, 3503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 3079 Invalid, 0 Unknown, 357 Unchecked, 0.9s Time] [2021-12-06 19:44:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 19:44:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2021-12-06 19:44:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 19:44:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2021-12-06 19:44:55,912 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 139 [2021-12-06 19:44:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:55,912 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2021-12-06 19:44:55,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.55) internal successors, (213), 60 states have internal predecessors, (213), 0 states have call successors, (0), 0 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 19:44:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2021-12-06 19:44:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-06 19:44:55,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:55,913 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:55,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 19:44:56,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 19:44:56,115 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:44:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1923909816, now seen corresponding path program 10 times [2021-12-06 19:44:56,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:56,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695817518] [2021-12-06 19:44:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:56,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 66 proven. 302 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:44:56,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:56,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695817518] [2021-12-06 19:44:56,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695817518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:56,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742492268] [2021-12-06 19:44:56,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:44:56,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:56,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:56,411 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:56,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 19:44:56,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:44:56,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 19:44:56,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:44:57,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:57,473 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 19:44:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:44:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742492268] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:57,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:44:57,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2021-12-06 19:44:57,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86024441] [2021-12-06 19:44:57,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:57,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 19:44:57,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:44:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 19:44:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2735, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 19:44:57,839 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 56 states, 55 states have (on average 4.963636363636364) internal successors, (273), 56 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 19:44:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:58,950 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2021-12-06 19:44:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:44:58,950 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.963636363636364) internal successors, (273), 56 states have internal predecessors, (273), 0 states have call successors, (0), 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 143 [2021-12-06 19:44:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:58,951 INFO L225 Difference]: With dead ends: 153 [2021-12-06 19:44:58,951 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 19:44:58,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1446, Invalid=5360, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 19:44:58,952 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 771 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:58,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 839 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:44:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 19:44:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-12-06 19:44:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 19:44:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2021-12-06 19:44:58,954 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 143 [2021-12-06 19:44:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:58,954 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2021-12-06 19:44:58,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.963636363636364) internal successors, (273), 56 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 19:44:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2021-12-06 19:44:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 19:44:58,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:58,955 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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, 1] [2021-12-06 19:44:58,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 19:44:59,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 19:44:59,156 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:44:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -874873014, now seen corresponding path program 11 times [2021-12-06 19:44:59,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:44:59,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326989130] [2021-12-06 19:44:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:59,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:44:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 274 proven. 161 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:44:59,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:44:59,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326989130] [2021-12-06 19:44:59,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326989130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:59,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585281735] [2021-12-06 19:44:59,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:44:59,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:44:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:59,439 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:44:59,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 19:45:00,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 19:45:00,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 19:45:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:00,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:00,912 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 19:45:00,914 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 19:45:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 315 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:45:01,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 315 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 19:45:02,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585281735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:02,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:02,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 55 [2021-12-06 19:45:02,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773254793] [2021-12-06 19:45:02,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:02,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 19:45:02,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:02,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 19:45:02,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2534, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 19:45:02,141 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 55 states, 55 states have (on average 5.254545454545455) internal successors, (289), 55 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 19:45:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:02,998 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2021-12-06 19:45:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:45:02,998 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.254545454545455) internal successors, (289), 55 states have internal predecessors, (289), 0 states have call successors, (0), 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 19:45:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:02,999 INFO L225 Difference]: With dead ends: 270 [2021-12-06 19:45:02,999 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 19:45:03,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 19:45:03,000 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 183 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:03,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 713 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:45:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 19:45:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2021-12-06 19:45:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 19:45:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-12-06 19:45:03,002 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 151 [2021-12-06 19:45:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:03,002 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-12-06 19:45:03,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.254545454545455) internal successors, (289), 55 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 19:45:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-12-06 19:45:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 19:45:03,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:03,003 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:03,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 19:45:03,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 19:45:03,204 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:03,205 INFO L85 PathProgramCache]: Analyzing trace with hash 78607245, now seen corresponding path program 12 times [2021-12-06 19:45:03,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:03,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63614496] [2021-12-06 19:45:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:03,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:45:04,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63614496] [2021-12-06 19:45:04,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63614496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374361055] [2021-12-06 19:45:04,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:45:04,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:04,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:04,072 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:04,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 19:45:05,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 19:45:05,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:05,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 214 conjunts are in the unsatisfiable core [2021-12-06 19:45:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:05,767 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 19:45:06,760 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 19:45:06,760 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 26 treesize of output 10 [2021-12-06 19:45:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 544 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:45:06,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:07,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:07,880 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 103 treesize of output 103 [2021-12-06 19:45:07,887 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 40 treesize of output 36 [2021-12-06 19:45:07,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:07,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 55 treesize of output 51 [2021-12-06 19:45:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 392 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:45:09,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374361055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:09,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:09,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 45, 36] total 102 [2021-12-06 19:45:09,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165308564] [2021-12-06 19:45:09,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:09,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-06 19:45:09,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-06 19:45:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=9935, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 19:45:09,169 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 102 states, 102 states have (on average 3.627450980392157) internal successors, (370), 102 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 19:45:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:12,890 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2021-12-06 19:45:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 19:45:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.627450980392157) internal successors, (370), 102 states have internal predecessors, (370), 0 states have call successors, (0), 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 155 [2021-12-06 19:45:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:12,891 INFO L225 Difference]: With dead ends: 240 [2021-12-06 19:45:12,891 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 19:45:12,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4350 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1054, Invalid=17036, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 19:45:12,893 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 563 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 5613 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 5905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 5613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:12,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 2652 Invalid, 5905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 5613 Invalid, 0 Unknown, 125 Unchecked, 1.9s Time] [2021-12-06 19:45:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 19:45:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-12-06 19:45:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 19:45:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-12-06 19:45:12,895 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2021-12-06 19:45:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:12,895 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-12-06 19:45:12,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.627450980392157) internal successors, (370), 102 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 19:45:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-12-06 19:45:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 19:45:12,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:12,896 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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, 1] [2021-12-06 19:45:12,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 19:45:13,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:13,097 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:13,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1903115888, now seen corresponding path program 13 times [2021-12-06 19:45:13,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:13,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570765923] [2021-12-06 19:45:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:13,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 91 proven. 377 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:45:13,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:13,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570765923] [2021-12-06 19:45:13,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570765923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:13,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749480366] [2021-12-06 19:45:13,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:45:13,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:13,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:13,447 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:13,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 19:45:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:13,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 19:45:13,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 120 proven. 348 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:45:13,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:14,431 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 19:45:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 120 proven. 348 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:45:14,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749480366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:14,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:14,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 51 [2021-12-06 19:45:14,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566679348] [2021-12-06 19:45:14,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:14,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 19:45:14,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:14,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 19:45:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 19:45:14,499 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 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 19:45:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:15,392 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2021-12-06 19:45:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 19:45:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 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) Word has length 159 [2021-12-06 19:45:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:15,393 INFO L225 Difference]: With dead ends: 169 [2021-12-06 19:45:15,393 INFO L226 Difference]: Without dead ends: 169 [2021-12-06 19:45:15,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 289 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1027, Invalid=4375, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 19:45:15,395 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 754 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:15,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 999 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:45:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-06 19:45:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-12-06 19:45:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) 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 19:45:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-12-06 19:45:15,398 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 159 [2021-12-06 19:45:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:15,398 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-12-06 19:45:15,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.019607843137255) internal successors, (256), 52 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 19:45:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-12-06 19:45:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 19:45:15,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:15,400 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 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, 1] [2021-12-06 19:45:15,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 19:45:15,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:15,600 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1150484078, now seen corresponding path program 14 times [2021-12-06 19:45:15,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:15,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456689564] [2021-12-06 19:45:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:15,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 344 proven. 199 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:45:15,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456689564] [2021-12-06 19:45:15,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456689564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333463287] [2021-12-06 19:45:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:45:15,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:15,859 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:15,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 19:45:16,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:45:16,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 19:45:16,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:16,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:16,036 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 19:45:16,038 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 19:45:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 381 proven. 162 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:45:16,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 353 proven. 190 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 19:45:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333463287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:17,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:17,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 57 [2021-12-06 19:45:17,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109451633] [2021-12-06 19:45:17,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:17,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 19:45:17,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 19:45:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 19:45:17,011 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 57 states, 57 states have (on average 5.105263157894737) internal successors, (291), 57 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 19:45:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:17,492 INFO L93 Difference]: Finished difference Result 298 states and 301 transitions. [2021-12-06 19:45:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 19:45:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.105263157894737) internal successors, (291), 57 states have internal predecessors, (291), 0 states have call successors, (0), 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 167 [2021-12-06 19:45:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:17,493 INFO L225 Difference]: With dead ends: 298 [2021-12-06 19:45:17,493 INFO L226 Difference]: Without dead ends: 175 [2021-12-06 19:45:17,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1437, Invalid=4883, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 19:45:17,494 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 149 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:17,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 531 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:45:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-06 19:45:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-12-06 19:45:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0175438596491229) 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 19:45:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2021-12-06 19:45:17,496 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2021-12-06 19:45:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:17,497 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2021-12-06 19:45:17,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.105263157894737) internal successors, (291), 57 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 19:45:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2021-12-06 19:45:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-06 19:45:17,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:17,498 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:17,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 19:45:17,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:17,699 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash -800124971, now seen corresponding path program 15 times [2021-12-06 19:45:17,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:17,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012530069] [2021-12-06 19:45:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:17,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:45:18,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:18,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012530069] [2021-12-06 19:45:18,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012530069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:18,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273697470] [2021-12-06 19:45:18,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:45:18,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:18,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:18,740 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:18,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 19:45:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 19:45:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:21,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 166 conjunts are in the unsatisfiable core [2021-12-06 19:45:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:21,955 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 19:45:22,293 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 19:45:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 495 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:45:22,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:23,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:23,407 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 19:45:23,444 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 19:45:23,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:45:23,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 54 treesize of output 54 [2021-12-06 19:45:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 48 proven. 495 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:45:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273697470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:23,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:23,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 30, 30] total 75 [2021-12-06 19:45:23,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362705297] [2021-12-06 19:45:23,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:23,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 19:45:23,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 19:45:23,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5326, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 19:45:23,681 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 75 states, 75 states have (on average 4.133333333333334) internal successors, (310), 75 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 19:45:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:26,924 INFO L93 Difference]: Finished difference Result 356 states and 359 transitions. [2021-12-06 19:45:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 19:45:26,924 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.133333333333334) internal successors, (310), 75 states have internal predecessors, (310), 0 states have call successors, (0), 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 171 [2021-12-06 19:45:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:26,925 INFO L225 Difference]: With dead ends: 356 [2021-12-06 19:45:26,926 INFO L226 Difference]: Without dead ends: 274 [2021-12-06 19:45:26,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 315 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=815, Invalid=12067, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 19:45:26,926 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 351 mSDsluCounter, 2821 mSDsCounter, 0 mSdLazyCounter, 4267 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 5557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 4267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1214 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:26,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 2884 Invalid, 5557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 4267 Invalid, 0 Unknown, 1214 Unchecked, 1.4s Time] [2021-12-06 19:45:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-06 19:45:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 176. [2021-12-06 19:45:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0171428571428571) internal successors, (178), 175 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 19:45:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2021-12-06 19:45:26,929 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 171 [2021-12-06 19:45:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:26,929 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2021-12-06 19:45:26,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.133333333333334) internal successors, (310), 75 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 19:45:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2021-12-06 19:45:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 19:45:26,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:26,930 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:26,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 19:45:27,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:27,131 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash -802318376, now seen corresponding path program 16 times [2021-12-06 19:45:27,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:27,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501899986] [2021-12-06 19:45:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:27,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 120 proven. 460 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:45:27,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501899986] [2021-12-06 19:45:27,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501899986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262200303] [2021-12-06 19:45:27,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:45:27,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:27,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:27,542 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:27,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 19:45:27,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:45:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:27,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 19:45:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 427 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:45:28,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:29,011 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 19:45:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 153 proven. 427 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:45:29,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262200303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:29,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:29,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 65 [2021-12-06 19:45:29,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732680493] [2021-12-06 19:45:29,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:29,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 19:45:29,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:29,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 19:45:29,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=3822, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 19:45:29,539 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 66 states, 65 states have (on average 5.061538461538461) internal successors, (329), 66 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 19:45:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:31,061 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2021-12-06 19:45:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 19:45:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 5.061538461538461) internal successors, (329), 66 states have internal predecessors, (329), 0 states have call successors, (0), 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 175 [2021-12-06 19:45:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:31,062 INFO L225 Difference]: With dead ends: 185 [2021-12-06 19:45:31,062 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:45:31,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2055, Invalid=7647, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 19:45:31,063 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1345 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:31,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1345 Valid, 1033 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:45:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:45:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-12-06 19:45:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 19:45:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-12-06 19:45:31,065 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2021-12-06 19:45:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:31,065 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-12-06 19:45:31,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 5.061538461538461) internal successors, (329), 66 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 19:45:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-12-06 19:45:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 19:45:31,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:31,066 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:31,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 19:45:31,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 19:45:31,267 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1995239462, now seen corresponding path program 17 times [2021-12-06 19:45:31,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:31,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302212391] [2021-12-06 19:45:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:31,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 422 proven. 241 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:45:31,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302212391] [2021-12-06 19:45:31,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302212391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738655956] [2021-12-06 19:45:31,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:45:31,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:31,582 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:31,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 19:45:33,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 19:45:33,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:33,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 19:45:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:33,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:33,895 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 19:45:33,898 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 19:45:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 473 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:45:34,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 473 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 19:45:35,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738655956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:35,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:35,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 65 [2021-12-06 19:45:35,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172625267] [2021-12-06 19:45:35,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:35,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 19:45:35,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 19:45:35,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=3555, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 19:45:35,465 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 65 states, 65 states have (on average 5.3076923076923075) internal successors, (345), 65 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 19:45:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:36,538 INFO L93 Difference]: Finished difference Result 326 states and 329 transitions. [2021-12-06 19:45:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 19:45:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.3076923076923075) internal successors, (345), 65 states have internal predecessors, (345), 0 states have call successors, (0), 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 183 [2021-12-06 19:45:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:36,540 INFO L225 Difference]: With dead ends: 326 [2021-12-06 19:45:36,540 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 19:45:36,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1925, Invalid=7975, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 19:45:36,540 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 172 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:36,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 684 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:45:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 19:45:36,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2021-12-06 19:45:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 19:45:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2021-12-06 19:45:36,543 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 183 [2021-12-06 19:45:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:36,543 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2021-12-06 19:45:36,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.3076923076923075) internal successors, (345), 65 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 19:45:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2021-12-06 19:45:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-06 19:45:36,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:36,544 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:36,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 19:45:36,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 19:45:36,745 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash 9320477, now seen corresponding path program 18 times [2021-12-06 19:45:36,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905301973] [2021-12-06 19:45:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 53 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:45:37,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:37,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905301973] [2021-12-06 19:45:37,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905301973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:37,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187654372] [2021-12-06 19:45:37,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:45:37,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:37,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:37,878 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:37,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 19:45:41,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 19:45:41,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-06 19:45:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:41,947 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 19:45:42,342 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 19:45:42,343 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 26 treesize of output 10 [2021-12-06 19:45:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 53 proven. 610 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 19:45:42,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:42,648 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 19:45:42,649 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 19:45:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 53 proven. 610 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 19:45:42,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187654372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:42,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:42,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 32, 32] total 72 [2021-12-06 19:45:42,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879191817] [2021-12-06 19:45:42,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:42,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 19:45:42,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 19:45:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=4898, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 19:45:42,862 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 72 states, 72 states have (on average 3.638888888888889) internal successors, (262), 72 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 19:45:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:46,087 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2021-12-06 19:45:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 19:45:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.638888888888889) internal successors, (262), 72 states have internal predecessors, (262), 0 states have call successors, (0), 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 187 [2021-12-06 19:45:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:46,088 INFO L225 Difference]: With dead ends: 288 [2021-12-06 19:45:46,088 INFO L226 Difference]: Without dead ends: 198 [2021-12-06 19:45:46,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 354 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=887, Invalid=11769, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 19:45:46,089 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 724 mSDsluCounter, 2909 mSDsCounter, 0 mSdLazyCounter, 5223 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 5603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:46,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 2978 Invalid, 5603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5223 Invalid, 0 Unknown, 233 Unchecked, 1.5s Time] [2021-12-06 19:45:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-06 19:45:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2021-12-06 19:45:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 19:45:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2021-12-06 19:45:46,091 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 187 [2021-12-06 19:45:46,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:46,091 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2021-12-06 19:45:46,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.638888888888889) internal successors, (262), 72 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 19:45:46,091 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2021-12-06 19:45:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-06 19:45:46,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:46,092 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:46,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 19:45:46,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:46,293 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1941571040, now seen corresponding path program 19 times [2021-12-06 19:45:46,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:46,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886347255] [2021-12-06 19:45:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:46,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 153 proven. 551 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 19:45:46,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886347255] [2021-12-06 19:45:46,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886347255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623973840] [2021-12-06 19:45:46,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:45:46,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:46,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:46,710 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:46,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 19:45:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:46,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-06 19:45:46,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 190 proven. 514 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 19:45:47,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:47,902 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 19:45:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 190 proven. 514 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 19:45:47,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623973840] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:47,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:47,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 59 [2021-12-06 19:45:47,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879756384] [2021-12-06 19:45:47,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:47,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 19:45:47,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 19:45:47,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 19:45:47,981 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand has 60 states, 59 states have (on average 5.1525423728813555) internal successors, (304), 60 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 19:45:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:49,149 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2021-12-06 19:45:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 19:45:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 5.1525423728813555) internal successors, (304), 60 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 191 [2021-12-06 19:45:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:49,150 INFO L225 Difference]: With dead ends: 201 [2021-12-06 19:45:49,150 INFO L226 Difference]: Without dead ends: 201 [2021-12-06 19:45:49,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 349 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1389, Invalid=5921, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 19:45:49,151 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 889 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:49,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1403 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 19:45:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-06 19:45:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-12-06 19:45:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.015075376884422) internal successors, (202), 199 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 19:45:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2021-12-06 19:45:49,153 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 191 [2021-12-06 19:45:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:49,154 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2021-12-06 19:45:49,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 5.1525423728813555) internal successors, (304), 60 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 19:45:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2021-12-06 19:45:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 19:45:49,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:49,155 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:49,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 19:45:49,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 19:45:49,356 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1830245854, now seen corresponding path program 20 times [2021-12-06 19:45:49,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:49,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003491452] [2021-12-06 19:45:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:49,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 508 proven. 287 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 19:45:49,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003491452] [2021-12-06 19:45:49,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003491452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252317299] [2021-12-06 19:45:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:45:49,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:49,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:49,755 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:49,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 19:45:49,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:45:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-06 19:45:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:49,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:45:49,936 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 19:45:49,938 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 19:45:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 553 proven. 242 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 19:45:50,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 519 proven. 276 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 19:45:51,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252317299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:51,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:45:51,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 68 [2021-12-06 19:45:51,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863785912] [2021-12-06 19:45:51,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:51,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 19:45:51,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:45:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 19:45:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=3716, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 19:45:51,485 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand has 68 states, 68 states have (on average 5.205882352941177) internal successors, (354), 68 states have internal predecessors, (354), 0 states have call successors, (0), 0 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 19:45:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:52,255 INFO L93 Difference]: Finished difference Result 354 states and 357 transitions. [2021-12-06 19:45:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 19:45:52,255 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 5.205882352941177) internal successors, (354), 68 states have internal predecessors, (354), 0 states have call successors, (0), 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 199 [2021-12-06 19:45:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:52,256 INFO L225 Difference]: With dead ends: 354 [2021-12-06 19:45:52,256 INFO L226 Difference]: Without dead ends: 207 [2021-12-06 19:45:52,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1857 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1988, Invalid=6942, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 19:45:52,257 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 191 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:52,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 783 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:45:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-06 19:45:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2021-12-06 19:45:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 19:45:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2021-12-06 19:45:52,259 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 199 [2021-12-06 19:45:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:52,260 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2021-12-06 19:45:52,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 5.205882352941177) internal successors, (354), 68 states have internal predecessors, (354), 0 states have call successors, (0), 0 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 19:45:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2021-12-06 19:45:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-06 19:45:52,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:52,261 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:52,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 19:45:52,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 19:45:52,462 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 19:45:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:52,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1535700069, now seen corresponding path program 21 times [2021-12-06 19:45:52,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:45:52,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886634393] [2021-12-06 19:45:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:45:52,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:45:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:45:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 58 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:45:53,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:45:53,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886634393] [2021-12-06 19:45:53,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886634393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:45:53,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107694696] [2021-12-06 19:45:53,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:45:53,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:45:53,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:45:53,686 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:45:53,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 19:45:57,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 19:45:57,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 19:45:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:57,698 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:45:57,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 19:45:57,935 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 19:45:58,318 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-12-06 19:45:58,319 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 32 treesize of output 36 [2021-12-06 19:45:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 44 proven. 69 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2021-12-06 19:45:58,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:46:01,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:46:01,083 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 19:46:01,099 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 19:46:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 836 trivial. 0 not checked. [2021-12-06 19:46:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107694696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:46:01,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:46:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 11, 12] total 71 [2021-12-06 19:46:01,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299154969] [2021-12-06 19:46:01,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:46:01,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 19:46:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:46:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 19:46:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4745, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 19:46:01,765 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 71 states, 71 states have (on average 3.971830985915493) internal successors, (282), 71 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 19:46:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:46:12,670 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2021-12-06 19:46:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-06 19:46:12,671 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.971830985915493) internal successors, (282), 71 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) Word has length 203 [2021-12-06 19:46:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:46:12,671 INFO L225 Difference]: With dead ends: 308 [2021-12-06 19:46:12,671 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 19:46:12,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 395 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6803 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=5442, Invalid=31614, Unknown=0, NotChecked=0, Total=37056 [2021-12-06 19:46:12,672 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 518 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 6414 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 6920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 6414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:46:12,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 2385 Invalid, 6920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 6414 Invalid, 0 Unknown, 253 Unchecked, 2.2s Time] [2021-12-06 19:46:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 19:46:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 19:46:12,673 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 19:46:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 19:46:12,673 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 203 [2021-12-06 19:46:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:12,673 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 19:46:12,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.971830985915493) internal successors, (282), 71 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 19:46:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 19:46:12,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 19:46:12,675 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-12-06 19:46:12,675 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-12-06 19:46:12,675 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-12-06 19:46:12,675 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (2 of 19 remaining) [2021-12-06 19:46:12,676 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (1 of 19 remaining) [2021-12-06 19:46:12,677 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-12-06 19:46:12,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 19:46:12,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 19:46:12,886 INFO L732 BasicCegarLoop]: Path program histogram: [21, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:46:12,890 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:46:12,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:46:12 BoogieIcfgContainer [2021-12-06 19:46:12,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:46:12,898 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:46:12,898 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:46:12,898 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:46:12,899 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:42:45" (3/4) ... [2021-12-06 19:46:12,901 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 19:46:12,910 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-12-06 19:46:12,910 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 19:46:12,910 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 19:46:12,910 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 19:46:12,936 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 19:46:12,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:46:12,936 INFO L158 Benchmark]: Toolchain (without parser) took 207820.98ms. Allocated memory was 117.4MB in the beginning and 146.8MB in the end (delta: 29.4MB). Free memory was 86.5MB in the beginning and 57.6MB in the end (delta: 28.9MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. [2021-12-06 19:46:12,937 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory was 72.1MB in the beginning and 72.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:46:12,937 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.68ms. Allocated memory is still 117.4MB. Free memory was 86.5MB in the beginning and 82.8MB in the end (delta: 3.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-06 19:46:12,937 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.05ms. Allocated memory is still 117.4MB. Free memory was 82.8MB in the beginning and 80.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:46:12,937 INFO L158 Benchmark]: Boogie Preprocessor took 25.54ms. Allocated memory is still 117.4MB. Free memory was 80.9MB in the beginning and 79.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:46:12,937 INFO L158 Benchmark]: RCFGBuilder took 270.46ms. Allocated memory is still 117.4MB. Free memory was 79.3MB in the beginning and 66.0MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 19:46:12,937 INFO L158 Benchmark]: TraceAbstraction took 207165.11ms. Allocated memory was 117.4MB in the beginning and 146.8MB in the end (delta: 29.4MB). Free memory was 65.4MB in the beginning and 61.5MB in the end (delta: 3.9MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. [2021-12-06 19:46:12,937 INFO L158 Benchmark]: Witness Printer took 38.13ms. Allocated memory is still 146.8MB. Free memory was 61.5MB in the beginning and 57.6MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 19:46:12,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory was 72.1MB in the beginning and 72.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.68ms. Allocated memory is still 117.4MB. Free memory was 86.5MB in the beginning and 82.8MB in the end (delta: 3.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.05ms. Allocated memory is still 117.4MB. Free memory was 82.8MB in the beginning and 80.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.54ms. Allocated memory is still 117.4MB. Free memory was 80.9MB in the beginning and 79.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 270.46ms. Allocated memory is still 117.4MB. Free memory was 79.3MB in the beginning and 66.0MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 207165.11ms. Allocated memory was 117.4MB in the beginning and 146.8MB in the end (delta: 29.4MB). Free memory was 65.4MB in the beginning and 61.5MB in the end (delta: 3.9MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. * Witness Printer took 38.13ms. Allocated memory is still 146.8MB. Free memory was 61.5MB in the beginning and 57.6MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. 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: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 545]: 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: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: 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: 526]: 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, 54 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 207.1s, OverallIterations: 60, TraceHistogramMax: 13, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 63.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14893 SdHoareTripleChecker+Valid, 16.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14893 mSDsluCounter, 34683 SdHoareTripleChecker+Invalid, 13.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4185 IncrementalHoareTripleChecker+Unchecked, 32403 mSDsCounter, 2381 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48100 IncrementalHoareTripleChecker+Invalid, 54666 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2381 mSolverCounterUnsat, 2280 mSDtfsCounter, 48100 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9949 GetRequests, 7099 SyntacticMatches, 57 SemanticMatches, 2793 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 48482 ImplicationChecksByTransitivity, 127.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204occurred in iteration=59, InterpolantAutomatonStates: 1434, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 60 MinimizatonAttempts, 617 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 21.1s SatisfiabilityAnalysisTime, 111.4s InterpolantComputationTime, 8399 NumberOfCodeBlocks, 8367 NumberOfCodeBlocksAsserted, 225 NumberOfCheckSat, 12258 ConstructedInterpolants, 644 QuantifiedInterpolants, 135099 SizeOfPredicates, 968 NumberOfNonLiveVariables, 19221 ConjunctsInSsa, 2938 ConjunctsInUnsatCore, 137 InterpolantComputations, 22 PerfectInterpolantSequences, 18511/38847 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 19:46:12,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9149126-04b3-42e1-96bd-51d0b04ff36b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE