./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/process_queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/process_queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:25:49,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:25:49,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:25:49,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:25:49,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:25:49,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:25:49,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:25:49,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:25:49,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:25:49,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:25:49,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:25:49,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:25:49,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:25:49,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:25:49,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:25:49,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:25:49,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:25:49,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:25:49,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:25:49,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:25:49,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:25:49,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:25:49,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:25:49,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:25:49,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:25:49,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:25:49,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:25:49,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:25:49,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:25:49,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:25:49,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:25:49,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:25:49,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:25:49,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:25:49,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:25:49,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:25:49,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:25:49,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:25:49,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:25:49,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:25:49,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:25:49,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:25:49,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:25:49,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:25:49,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:25:49,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:25:49,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:25:49,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:25:49,409 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:25:49,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:25:49,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:25:49,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:25:49,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:25:49,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:25:49,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:25:49,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:25:49,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:25:49,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:25:49,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:25:49,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:25:49,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:25:49,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:25:49,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:25:49,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:25:49,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:25:49,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:25:49,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:25:49,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:25:49,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:25:49,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:25:49,416 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:25:49,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:25:49,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:25:49,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:25:49,418 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_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c [2021-11-07 08:25:49,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:25:49,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:25:49,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:25:49,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:25:49,819 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:25:49,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/heap-data/process_queue.i [2021-11-07 08:25:49,959 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/data/e226f1444/4a45c84510124110a46252ea00aa4c4c/FLAG688bb155d [2021-11-07 08:25:50,658 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:25:50,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/sv-benchmarks/c/heap-data/process_queue.i [2021-11-07 08:25:50,681 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/data/e226f1444/4a45c84510124110a46252ea00aa4c4c/FLAG688bb155d [2021-11-07 08:25:50,938 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/data/e226f1444/4a45c84510124110a46252ea00aa4c4c [2021-11-07 08:25:50,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:25:50,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:25:50,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:25:50,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:25:50,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:25:50,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:50" (1/1) ... [2021-11-07 08:25:50,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be5757f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:50, skipping insertion in model container [2021-11-07 08:25:50,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:50" (1/1) ... [2021-11-07 08:25:50,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:25:51,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:25:51,472 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2021-11-07 08:25:51,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:25:51,519 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:25:51,601 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2021-11-07 08:25:51,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:25:51,643 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:25:51,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51 WrapperNode [2021-11-07 08:25:51,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:25:51,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:25:51,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:25:51,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:25:51,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:25:51,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:25:51,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:25:51,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:25:51,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:25:51,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:25:51,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:25:51,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:25:51,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (1/1) ... [2021-11-07 08:25:51,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:25:51,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:25:51,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:25:51,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:25:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:25:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:25:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:25:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:25:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:25:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:25:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:25:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 08:25:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:25:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:25:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:25:52,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:25:52,330 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-07 08:25:52,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:25:52 BoogieIcfgContainer [2021-11-07 08:25:52,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:25:52,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:25:52,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:25:52,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:25:52,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:25:50" (1/3) ... [2021-11-07 08:25:52,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22578bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:25:52, skipping insertion in model container [2021-11-07 08:25:52,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:51" (2/3) ... [2021-11-07 08:25:52,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22578bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:25:52, skipping insertion in model container [2021-11-07 08:25:52,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:25:52" (3/3) ... [2021-11-07 08:25:52,347 INFO L111 eAbstractionObserver]: Analyzing ICFG process_queue.i [2021-11-07 08:25:52,378 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:25:52,391 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:25:52,474 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:25:52,483 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:25:52,483 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:25:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:25:52,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:52,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:52,511 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash 765962421, now seen corresponding path program 1 times [2021-11-07 08:25:52,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:52,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815275917] [2021-11-07 08:25:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:52,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:52,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:52,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815275917] [2021-11-07 08:25:52,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815275917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:52,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:52,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:52,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056920574] [2021-11-07 08:25:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:52,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:52,860 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-11-07 08:25:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:52,931 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2021-11-07 08:25:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:52,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2021-11-07 08:25:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:52,947 INFO L225 Difference]: With dead ends: 49 [2021-11-07 08:25:52,948 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 08:25:52,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 08:25:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-07 08:25:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2021-11-07 08:25:53,002 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2021-11-07 08:25:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:53,003 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-11-07 08:25:53,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-11-07 08:25:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2021-11-07 08:25:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:25:53,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:53,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:53,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:25:53,008 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:53,013 INFO L85 PathProgramCache]: Analyzing trace with hash 708704119, now seen corresponding path program 1 times [2021-11-07 08:25:53,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:53,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437859334] [2021-11-07 08:25:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:53,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:53,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:53,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437859334] [2021-11-07 08:25:53,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437859334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:53,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:53,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:25:53,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716052794] [2021-11-07 08:25:53,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:25:53,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:25:53,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:25:53,358 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-11-07 08:25:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:53,626 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2021-11-07 08:25:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:25:53,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 [2021-11-07 08:25:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:53,630 INFO L225 Difference]: With dead ends: 91 [2021-11-07 08:25:53,630 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 08:25:53,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:25:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 08:25:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2021-11-07 08:25:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2021-11-07 08:25:53,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 10 [2021-11-07 08:25:53,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:53,647 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2021-11-07 08:25:53,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-11-07 08:25:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2021-11-07 08:25:53,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:25:53,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:53,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:53,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:25:53,650 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1941169483, now seen corresponding path program 1 times [2021-11-07 08:25:53,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:53,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19921921] [2021-11-07 08:25:53,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:53,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:53,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:53,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19921921] [2021-11-07 08:25:53,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19921921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:53,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:53,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:25:53,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071286227] [2021-11-07 08:25:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:25:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:25:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:25:53,741 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:53,843 INFO L93 Difference]: Finished difference Result 99 states and 134 transitions. [2021-11-07 08:25:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:25:53,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2021-11-07 08:25:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:53,849 INFO L225 Difference]: With dead ends: 99 [2021-11-07 08:25:53,849 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 08:25:53,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 08:25:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-11-07 08:25:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.375) internal successors, (66), 48 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2021-11-07 08:25:53,870 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 11 [2021-11-07 08:25:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:53,870 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2021-11-07 08:25:53,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2021-11-07 08:25:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:25:53,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:53,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:53,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:25:53,872 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 578790451, now seen corresponding path program 1 times [2021-11-07 08:25:53,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:53,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138949196] [2021-11-07 08:25:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:53,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:53,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:53,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138949196] [2021-11-07 08:25:53,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138949196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:53,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:53,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:25:53,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644232066] [2021-11-07 08:25:53,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:25:53,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:53,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:25:53,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:25:53,981 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:54,111 INFO L93 Difference]: Finished difference Result 101 states and 135 transitions. [2021-11-07 08:25:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:25:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2021-11-07 08:25:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:54,114 INFO L225 Difference]: With dead ends: 101 [2021-11-07 08:25:54,115 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 08:25:54,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 08:25:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2021-11-07 08:25:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-11-07 08:25:54,126 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 11 [2021-11-07 08:25:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:54,127 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-11-07 08:25:54,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-11-07 08:25:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:25:54,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:54,128 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:54,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:25:54,129 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:54,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:54,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1050906354, now seen corresponding path program 1 times [2021-11-07 08:25:54,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:54,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928609868] [2021-11-07 08:25:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:54,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:54,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:54,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928609868] [2021-11-07 08:25:54,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928609868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:25:54,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578851544] [2021-11-07 08:25:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:54,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:25:54,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:25:54,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:25:54,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:25:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:54,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 08:25:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:25:54,576 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:25:55,342 INFO L354 Elim1Store]: treesize reduction 501, result has 16.6 percent of original size [2021-11-07 08:25:55,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 628 treesize of output 376 [2021-11-07 08:25:55,785 INFO L354 Elim1Store]: treesize reduction 681, result has 16.6 percent of original size [2021-11-07 08:25:55,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1141 treesize of output 797 [2021-11-07 08:25:55,857 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 08:25:55,858 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 897 treesize of output 897 [2021-11-07 08:25:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:56,073 INFO L354 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2021-11-07 08:25:56,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 94 [2021-11-07 08:25:56,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:56,248 INFO L354 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2021-11-07 08:25:56,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 69 [2021-11-07 08:25:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:25:58,494 INFO L354 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2021-11-07 08:25:58,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 92 [2021-11-07 08:25:58,578 INFO L354 Elim1Store]: treesize reduction 71, result has 16.5 percent of original size [2021-11-07 08:25:58,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 141 treesize of output 94 [2021-11-07 08:25:58,800 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-07 08:25:58,800 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2021-11-07 08:25:58,807 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:25:58,808 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 19 [2021-11-07 08:25:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:58,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578851544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:25:58,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:25:58,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-07 08:25:58,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839572026] [2021-11-07 08:25:58,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:25:58,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:25:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:25:58,829 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:59,487 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2021-11-07 08:25:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:25:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2021-11-07 08:25:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:59,489 INFO L225 Difference]: With dead ends: 114 [2021-11-07 08:25:59,489 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 08:25:59,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:25:59,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 08:25:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2021-11-07 08:25:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 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) [2021-11-07 08:25:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-07 08:25:59,500 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 13 [2021-11-07 08:25:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:59,500 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-07 08:25:59,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-07 08:25:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:25:59,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:59,502 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:59,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:25:59,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:25:59,717 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2100423790, now seen corresponding path program 1 times [2021-11-07 08:25:59,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:59,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353229697] [2021-11-07 08:25:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:59,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:25:59,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:59,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353229697] [2021-11-07 08:25:59,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353229697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:59,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:59,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:25:59,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297290352] [2021-11-07 08:25:59,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:25:59,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:25:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:25:59,785 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 4 states, 4 states have (on average 4.25) 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) [2021-11-07 08:25:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:59,850 INFO L93 Difference]: Finished difference Result 106 states and 139 transitions. [2021-11-07 08:25:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:25:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) 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 [2021-11-07 08:25:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:59,852 INFO L225 Difference]: With dead ends: 106 [2021-11-07 08:25:59,852 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 08:25:59,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 08:25:59,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-11-07 08:25:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-11-07 08:25:59,864 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 17 [2021-11-07 08:25:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:59,865 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-11-07 08:25:59,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) 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) [2021-11-07 08:25:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-11-07 08:25:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:25:59,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:59,866 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:59,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:25:59,867 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash 32961051, now seen corresponding path program 1 times [2021-11-07 08:25:59,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:59,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490828194] [2021-11-07 08:25:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:59,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:26:00,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:00,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490828194] [2021-11-07 08:26:00,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490828194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:00,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060509881] [2021-11-07 08:26:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:00,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:00,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:00,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:00,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:26:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:00,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 08:26:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:00,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 110 [2021-11-07 08:26:00,388 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 98 treesize of output 77 [2021-11-07 08:26:00,394 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 87 treesize of output 54 [2021-11-07 08:26:00,398 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 43 treesize of output 31 [2021-11-07 08:26:00,452 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 42 treesize of output 30 [2021-11-07 08:26:00,456 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 27 treesize of output 19 [2021-11-07 08:26:00,479 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 [2021-11-07 08:26:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:26:00,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060509881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:00,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:00,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-07 08:26:00,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996389828] [2021-11-07 08:26:00,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:26:00,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:26:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:26:00,501 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:01,142 INFO L93 Difference]: Finished difference Result 231 states and 303 transitions. [2021-11-07 08:26:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:26:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 08:26:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:01,144 INFO L225 Difference]: With dead ends: 231 [2021-11-07 08:26:01,144 INFO L226 Difference]: Without dead ends: 179 [2021-11-07 08:26:01,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:26:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-07 08:26:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2021-11-07 08:26:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.3006134969325154) internal successors, (212), 163 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 212 transitions. [2021-11-07 08:26:01,167 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 212 transitions. Word has length 20 [2021-11-07 08:26:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:01,170 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 212 transitions. [2021-11-07 08:26:01,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 212 transitions. [2021-11-07 08:26:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 08:26:01,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:01,172 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:01,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:01,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:01,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1600928790, now seen corresponding path program 2 times [2021-11-07 08:26:01,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:01,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706246716] [2021-11-07 08:26:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:01,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:01,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:01,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706246716] [2021-11-07 08:26:01,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706246716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:01,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446921873] [2021-11-07 08:26:01,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:26:01,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:01,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:01,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:26:02,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:26:02,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:02,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 08:26:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:02,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:26:02,146 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 87 treesize of output 66 [2021-11-07 08:26:02,154 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 76 treesize of output 43 [2021-11-07 08:26:02,171 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-07 08:26:02,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 36 [2021-11-07 08:26:02,866 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 08:26:02,867 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 225 treesize of output 205 [2021-11-07 08:26:02,953 INFO L354 Elim1Store]: treesize reduction 218, result has 7.2 percent of original size [2021-11-07 08:26:02,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 206 [2021-11-07 08:26:02,967 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 187 treesize of output 167 [2021-11-07 08:26:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:03,023 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:26:03,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 203 treesize of output 171 [2021-11-07 08:26:03,032 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 170 treesize of output 137 [2021-11-07 08:26:03,048 INFO L354 Elim1Store]: treesize reduction 83, result has 23.1 percent of original size [2021-11-07 08:26:03,048 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 195 treesize of output 183 [2021-11-07 08:26:03,062 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-11-07 08:26:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 180 treesize of output 178 [2021-11-07 08:26:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:03,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 37 [2021-11-07 08:26:03,330 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-07 08:26:03,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 63 [2021-11-07 08:26:03,340 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-07 08:26:03,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-11-07 08:26:03,355 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 [2021-11-07 08:26:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446921873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:03,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:03,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-07 08:26:03,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000682076] [2021-11-07 08:26:03,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:26:03,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:26:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:26:03,366 INFO L87 Difference]: Start difference. First operand 164 states and 212 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:04,729 INFO L93 Difference]: Finished difference Result 307 states and 404 transitions. [2021-11-07 08:26:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:26:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 08:26:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:04,732 INFO L225 Difference]: With dead ends: 307 [2021-11-07 08:26:04,732 INFO L226 Difference]: Without dead ends: 305 [2021-11-07 08:26:04,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:26:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-07 08:26:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 178. [2021-11-07 08:26:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.2994350282485876) internal successors, (230), 177 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 230 transitions. [2021-11-07 08:26:04,758 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 230 transitions. Word has length 23 [2021-11-07 08:26:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:04,759 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 230 transitions. [2021-11-07 08:26:04,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 230 transitions. [2021-11-07 08:26:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:26:04,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:04,760 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:04,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:04,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 08:26:04,984 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1948816453, now seen corresponding path program 3 times [2021-11-07 08:26:04,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:04,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121784206] [2021-11-07 08:26:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:04,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:05,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:05,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121784206] [2021-11-07 08:26:05,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121784206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:05,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187989923] [2021-11-07 08:26:05,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:26:05,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:05,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:05,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:05,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:26:05,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:26:05,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:05,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-07 08:26:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:06,106 INFO L354 Elim1Store]: treesize reduction 501, result has 16.6 percent of original size [2021-11-07 08:26:06,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 287 [2021-11-07 08:26:06,328 INFO L354 Elim1Store]: treesize reduction 581, result has 18.1 percent of original size [2021-11-07 08:26:06,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 860 treesize of output 572 [2021-11-07 08:26:06,359 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 0 case distinctions, treesize of input 796 treesize of output 795 [2021-11-07 08:26:06,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:06,458 INFO L354 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2021-11-07 08:26:06,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 90 [2021-11-07 08:26:06,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:06,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 25 [2021-11-07 08:26:06,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:26:06,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:06,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:06,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:26:06,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 86 [2021-11-07 08:26:07,405 INFO L354 Elim1Store]: treesize reduction 71, result has 16.5 percent of original size [2021-11-07 08:26:07,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 348 treesize of output 221 [2021-11-07 08:26:07,735 INFO L354 Elim1Store]: treesize reduction 116, result has 32.2 percent of original size [2021-11-07 08:26:07,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 263 [2021-11-07 08:26:08,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:08,571 INFO L354 Elim1Store]: treesize reduction 536, result has 7.1 percent of original size [2021-11-07 08:26:08,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 224 treesize of output 203 [2021-11-07 08:26:08,621 INFO L354 Elim1Store]: treesize reduction 116, result has 16.5 percent of original size [2021-11-07 08:26:08,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 323 treesize of output 293 [2021-11-07 08:26:08,647 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-07 08:26:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 296 treesize of output 266 [2021-11-07 08:26:08,679 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-07 08:26:08,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 269 treesize of output 226 [2021-11-07 08:26:08,695 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-07 08:26:08,695 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 241 treesize of output 241 [2021-11-07 08:26:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:08,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:08,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 61 [2021-11-07 08:26:09,150 INFO L354 Elim1Store]: treesize reduction 122, result has 5.4 percent of original size [2021-11-07 08:26:09,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 99 [2021-11-07 08:26:09,179 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-07 08:26:09,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 48 [2021-11-07 08:26:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:26:09,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187989923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:09,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:09,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-11-07 08:26:09,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234697557] [2021-11-07 08:26:09,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:26:09,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:09,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:26:09,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:26:09,196 INFO L87 Difference]: Start difference. First operand 178 states and 230 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2021-11-07 08:26:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:20,604 INFO L93 Difference]: Finished difference Result 410 states and 537 transitions. [2021-11-07 08:26:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:26:20,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) Word has length 26 [2021-11-07 08:26:20,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:20,608 INFO L225 Difference]: With dead ends: 410 [2021-11-07 08:26:20,609 INFO L226 Difference]: Without dead ends: 282 [2021-11-07 08:26:20,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:26:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-07 08:26:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 230. [2021-11-07 08:26:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.2838427947598254) internal successors, (294), 229 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 294 transitions. [2021-11-07 08:26:20,636 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 294 transitions. Word has length 26 [2021-11-07 08:26:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:20,636 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 294 transitions. [2021-11-07 08:26:20,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2021-11-07 08:26:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 294 transitions. [2021-11-07 08:26:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:26:20,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:20,638 INFO L513 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] [2021-11-07 08:26:20,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:20,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 08:26:20,864 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:20,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1218142500, now seen corresponding path program 1 times [2021-11-07 08:26:20,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:20,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554962973] [2021-11-07 08:26:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:20,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:26:20,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:20,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554962973] [2021-11-07 08:26:20,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554962973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:20,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560358944] [2021-11-07 08:26:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:20,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:20,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:20,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:26:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:26:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:26:21,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560358944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:21,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:21,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 08:26:21,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642701880] [2021-11-07 08:26:21,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:26:21,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:21,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:26:21,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:26:21,258 INFO L87 Difference]: Start difference. First operand 230 states and 294 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:21,383 INFO L93 Difference]: Finished difference Result 541 states and 703 transitions. [2021-11-07 08:26:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:26:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 28 [2021-11-07 08:26:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:21,386 INFO L225 Difference]: With dead ends: 541 [2021-11-07 08:26:21,387 INFO L226 Difference]: Without dead ends: 334 [2021-11-07 08:26:21,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:26:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-07 08:26:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 268. [2021-11-07 08:26:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.2696629213483146) internal successors, (339), 267 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 339 transitions. [2021-11-07 08:26:21,415 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 339 transitions. Word has length 28 [2021-11-07 08:26:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:21,416 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 339 transitions. [2021-11-07 08:26:21,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 339 transitions. [2021-11-07 08:26:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:26:21,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:21,418 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:21,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:21,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:26:21,624 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash -207025250, now seen corresponding path program 1 times [2021-11-07 08:26:21,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:21,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606667048] [2021-11-07 08:26:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:21,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:21,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:21,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606667048] [2021-11-07 08:26:21,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606667048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:21,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015254559] [2021-11-07 08:26:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:21,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:21,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:21,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:21,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:26:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 08:26:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:22,091 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:26:22,175 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 117 treesize of output 96 [2021-11-07 08:26:22,181 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 89 treesize of output 68 [2021-11-07 08:26:22,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2021-11-07 08:26:22,195 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 48 treesize of output 36 [2021-11-07 08:26:22,203 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 08:26:22,204 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 33 treesize of output 33 [2021-11-07 08:26:22,440 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 41 treesize of output 33 [2021-11-07 08:26:22,445 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 30 treesize of output 18 [2021-11-07 08:26:22,473 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 [2021-11-07 08:26:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:26:22,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015254559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:22,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:22,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-07 08:26:22,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733680771] [2021-11-07 08:26:22,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:26:22,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:26:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:26:22,541 INFO L87 Difference]: Start difference. First operand 268 states and 339 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-11-07 08:26:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:23,174 INFO L93 Difference]: Finished difference Result 442 states and 569 transitions. [2021-11-07 08:26:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:26:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) Word has length 28 [2021-11-07 08:26:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:23,177 INFO L225 Difference]: With dead ends: 442 [2021-11-07 08:26:23,177 INFO L226 Difference]: Without dead ends: 276 [2021-11-07 08:26:23,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:26:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-07 08:26:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2021-11-07 08:26:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.2686567164179106) internal successors, (340), 268 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 340 transitions. [2021-11-07 08:26:23,210 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 340 transitions. Word has length 28 [2021-11-07 08:26:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:23,211 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 340 transitions. [2021-11-07 08:26:23,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-11-07 08:26:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 340 transitions. [2021-11-07 08:26:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:26:23,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:23,213 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:23,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:23,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:23,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1188384018, now seen corresponding path program 1 times [2021-11-07 08:26:23,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:23,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504149970] [2021-11-07 08:26:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:23,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:23,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:23,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504149970] [2021-11-07 08:26:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504149970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:23,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809288182] [2021-11-07 08:26:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:23,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:23,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:23,617 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:23,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:26:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 08:26:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:24,312 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-07 08:26:24,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 61 [2021-11-07 08:26:24,344 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-07 08:26:24,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 48 [2021-11-07 08:26:24,868 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:26:24,868 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 64 treesize of output 44 [2021-11-07 08:26:24,873 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:26:24,874 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 38 treesize of output 24 [2021-11-07 08:26:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:24,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809288182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:24,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:24,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-07 08:26:24,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448365141] [2021-11-07 08:26:24,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:26:24,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:26:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:26:24,888 INFO L87 Difference]: Start difference. First operand 269 states and 340 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:27,473 INFO L93 Difference]: Finished difference Result 793 states and 1039 transitions. [2021-11-07 08:26:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:26:27,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:26:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:27,477 INFO L225 Difference]: With dead ends: 793 [2021-11-07 08:26:27,477 INFO L226 Difference]: Without dead ends: 520 [2021-11-07 08:26:27,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=489, Invalid=1767, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:26:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-07 08:26:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 241. [2021-11-07 08:26:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.3333333333333333) internal successors, (320), 240 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 320 transitions. [2021-11-07 08:26:27,502 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 320 transitions. Word has length 29 [2021-11-07 08:26:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:27,503 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 320 transitions. [2021-11-07 08:26:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 320 transitions. [2021-11-07 08:26:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:26:27,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:27,504 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:27,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:27,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:26:27,720 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1581411028, now seen corresponding path program 1 times [2021-11-07 08:26:27,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:27,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623506120] [2021-11-07 08:26:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:27,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:26:27,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:27,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623506120] [2021-11-07 08:26:27,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623506120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:27,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:27,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:27,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822332939] [2021-11-07 08:26:27,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:27,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:27,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:27,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:27,769 INFO L87 Difference]: Start difference. First operand 241 states and 320 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:27,797 INFO L93 Difference]: Finished difference Result 518 states and 689 transitions. [2021-11-07 08:26:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:27,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 29 [2021-11-07 08:26:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:27,800 INFO L225 Difference]: With dead ends: 518 [2021-11-07 08:26:27,800 INFO L226 Difference]: Without dead ends: 308 [2021-11-07 08:26:27,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-07 08:26:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 244. [2021-11-07 08:26:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.3209876543209877) internal successors, (321), 243 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 321 transitions. [2021-11-07 08:26:27,824 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 321 transitions. Word has length 29 [2021-11-07 08:26:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:27,826 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 321 transitions. [2021-11-07 08:26:27,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 321 transitions. [2021-11-07 08:26:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:26:27,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:27,830 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-07 08:26:27,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:26:27,830 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2094096801, now seen corresponding path program 4 times [2021-11-07 08:26:27,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:27,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092886634] [2021-11-07 08:26:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:27,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:26:28,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:28,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092886634] [2021-11-07 08:26:28,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092886634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:28,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951029650] [2021-11-07 08:26:28,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:26:28,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:28,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:28,047 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:28,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:26:28,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:26:28,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:28,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 08:26:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:28,478 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-07 08:26:28,479 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 44 treesize of output 31 [2021-11-07 08:26:28,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:28,655 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:26:28,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 145 treesize of output 117 [2021-11-07 08:26:28,665 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 165 treesize of output 132 [2021-11-07 08:26:28,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2021-11-07 08:26:28,727 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 43 treesize of output 35 [2021-11-07 08:26:28,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:26:28,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2021-11-07 08:26:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:26:28,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951029650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:28,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:28,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-11-07 08:26:28,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942222385] [2021-11-07 08:26:28,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:26:28,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:26:28,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:26:28,838 INFO L87 Difference]: Start difference. First operand 244 states and 321 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:30,308 INFO L93 Difference]: Finished difference Result 487 states and 643 transitions. [2021-11-07 08:26:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:26:30,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 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 36 [2021-11-07 08:26:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:30,311 INFO L225 Difference]: With dead ends: 487 [2021-11-07 08:26:30,311 INFO L226 Difference]: Without dead ends: 274 [2021-11-07 08:26:30,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:26:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-07 08:26:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 244. [2021-11-07 08:26:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.3127572016460904) internal successors, (319), 243 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 319 transitions. [2021-11-07 08:26:30,337 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 319 transitions. Word has length 36 [2021-11-07 08:26:30,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:30,338 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 319 transitions. [2021-11-07 08:26:30,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 319 transitions. [2021-11-07 08:26:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:26:30,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:30,339 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:30,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:30,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:26:30,568 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1473565755, now seen corresponding path program 2 times [2021-11-07 08:26:30,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:30,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316953758] [2021-11-07 08:26:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:30,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:26:30,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:30,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316953758] [2021-11-07 08:26:30,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316953758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:30,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146681773] [2021-11-07 08:26:30,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:26:30,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:30,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:30,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:30,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:26:31,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:26:31,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 08:26:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:31,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 110 [2021-11-07 08:26:31,284 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 98 treesize of output 77 [2021-11-07 08:26:31,292 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 87 treesize of output 54 [2021-11-07 08:26:31,295 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 43 treesize of output 31 [2021-11-07 08:26:31,335 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 42 treesize of output 34 [2021-11-07 08:26:31,337 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 31 treesize of output 19 [2021-11-07 08:26:31,368 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 [2021-11-07 08:26:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:26:31,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146681773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:31,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:31,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-07 08:26:31,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491432148] [2021-11-07 08:26:31,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:26:31,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:26:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:26:31,377 INFO L87 Difference]: Start difference. First operand 244 states and 319 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:31,577 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2021-11-07 08:26:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:26:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 08:26:31,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:31,580 INFO L225 Difference]: With dead ends: 252 [2021-11-07 08:26:31,580 INFO L226 Difference]: Without dead ends: 250 [2021-11-07 08:26:31,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:26:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-07 08:26:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2021-11-07 08:26:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.2962962962962963) internal successors, (315), 243 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 315 transitions. [2021-11-07 08:26:31,605 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 315 transitions. Word has length 36 [2021-11-07 08:26:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:31,605 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 315 transitions. [2021-11-07 08:26:31,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 315 transitions. [2021-11-07 08:26:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:26:31,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:31,606 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-07 08:26:31,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:31,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:26:31,830 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:31,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1365504558, now seen corresponding path program 5 times [2021-11-07 08:26:31,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:31,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393576358] [2021-11-07 08:26:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:31,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:32,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:32,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393576358] [2021-11-07 08:26:32,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393576358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:32,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346942178] [2021-11-07 08:26:32,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:26:32,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:32,635 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:32,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:26:33,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-07 08:26:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:33,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-07 08:26:33,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:33,194 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 80 treesize of output 59 [2021-11-07 08:26:33,201 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 52 treesize of output 31 [2021-11-07 08:26:33,206 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 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 08:26:33,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:33,529 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:26:33,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 162 [2021-11-07 08:26:33,557 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 08:26:33,557 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 246 treesize of output 222 [2021-11-07 08:26:33,563 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 219 treesize of output 195 [2021-11-07 08:26:33,588 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-07 08:26:33,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 192 treesize of output 194 [2021-11-07 08:26:33,596 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 191 treesize of output 154 [2021-11-07 08:26:33,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:26:33,664 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:26:33,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 63 [2021-11-07 08:26:34,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:34,701 INFO L354 Elim1Store]: treesize reduction 595, result has 6.6 percent of original size [2021-11-07 08:26:34,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 309 treesize of output 269 [2021-11-07 08:26:34,779 INFO L354 Elim1Store]: treesize reduction 594, result has 7.0 percent of original size [2021-11-07 08:26:34,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 420 treesize of output 412 [2021-11-07 08:26:34,827 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-07 08:26:34,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 385 treesize of output 362 [2021-11-07 08:26:34,853 INFO L354 Elim1Store]: treesize reduction 107, result has 23.6 percent of original size [2021-11-07 08:26:34,854 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 346 treesize of output 334 [2021-11-07 08:26:34,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:26:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 331 treesize of output 298 [2021-11-07 08:26:34,881 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-11-07 08:26:34,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 256 [2021-11-07 08:26:34,895 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-07 08:26:34,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 250 treesize of output 240 [2021-11-07 08:26:34,965 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-07 08:26:34,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 200 treesize of output 94 [2021-11-07 08:26:35,522 INFO L354 Elim1Store]: treesize reduction 102, result has 9.7 percent of original size [2021-11-07 08:26:35,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 186 treesize of output 104 [2021-11-07 08:26:35,549 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-11-07 08:26:35,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 59 [2021-11-07 08:26:35,596 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 [2021-11-07 08:26:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:26:35,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346942178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:35,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:35,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-07 08:26:35,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902132022] [2021-11-07 08:26:35,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:26:35,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:35,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:26:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:26:35,626 INFO L87 Difference]: Start difference. First operand 244 states and 315 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:41,364 INFO L93 Difference]: Finished difference Result 349 states and 445 transitions. [2021-11-07 08:26:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:26:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 08:26:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:41,367 INFO L225 Difference]: With dead ends: 349 [2021-11-07 08:26:41,367 INFO L226 Difference]: Without dead ends: 347 [2021-11-07 08:26:41,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:26:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-07 08:26:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 260. [2021-11-07 08:26:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.2972972972972974) internal successors, (336), 259 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 336 transitions. [2021-11-07 08:26:41,394 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 336 transitions. Word has length 39 [2021-11-07 08:26:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:41,394 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 336 transitions. [2021-11-07 08:26:41,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 336 transitions. [2021-11-07 08:26:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:26:41,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:41,396 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:41,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:41,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:26:41,624 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:41,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1273582735, now seen corresponding path program 2 times [2021-11-07 08:26:41,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:41,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090398931] [2021-11-07 08:26:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:41,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:26:41,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:41,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090398931] [2021-11-07 08:26:41,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090398931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:41,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47662468] [2021-11-07 08:26:41,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:26:41,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:41,701 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:41,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:26:42,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:26:42,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:42,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:26:42,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:26:42,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47662468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:42,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:42,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 08:26:42,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462973424] [2021-11-07 08:26:42,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:26:42,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:26:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:26:42,272 INFO L87 Difference]: Start difference. First operand 260 states and 336 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:42,400 INFO L93 Difference]: Finished difference Result 732 states and 973 transitions. [2021-11-07 08:26:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:26:42,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 08:26:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:42,404 INFO L225 Difference]: With dead ends: 732 [2021-11-07 08:26:42,404 INFO L226 Difference]: Without dead ends: 503 [2021-11-07 08:26:42,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:26:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-07 08:26:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 389. [2021-11-07 08:26:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.3118556701030928) internal successors, (509), 388 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 509 transitions. [2021-11-07 08:26:42,455 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 509 transitions. Word has length 41 [2021-11-07 08:26:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:42,455 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 509 transitions. [2021-11-07 08:26:42,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 509 transitions. [2021-11-07 08:26:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:26:42,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:42,456 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:42,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:42,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:26:42,669 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2010267311, now seen corresponding path program 2 times [2021-11-07 08:26:42,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:42,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754724550] [2021-11-07 08:26:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:42,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:26:42,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:42,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754724550] [2021-11-07 08:26:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754724550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:42,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265474119] [2021-11-07 08:26:42,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:26:42,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:42,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:42,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:42,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:26:43,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:26:43,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-07 08:26:43,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:43,550 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-07 08:26:43,551 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 44 treesize of output 31 [2021-11-07 08:26:43,911 INFO L354 Elim1Store]: treesize reduction 501, result has 16.6 percent of original size [2021-11-07 08:26:43,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 311 treesize of output 243 [2021-11-07 08:26:43,936 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-11-07 08:26:43,936 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 351 treesize of output 316 [2021-11-07 08:26:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:43,996 INFO L354 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2021-11-07 08:26:43,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 84 [2021-11-07 08:26:44,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:26:44,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:44,121 INFO L354 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2021-11-07 08:26:44,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 69 [2021-11-07 08:26:44,339 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 42 treesize of output 34 [2021-11-07 08:26:44,398 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-07 08:26:44,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2021-11-07 08:26:44,434 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:26:44,437 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-11-07 08:26:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:26:44,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265474119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:44,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:44,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-11-07 08:26:44,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000834097] [2021-11-07 08:26:44,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:26:44,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:44,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:26:44,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:26:44,465 INFO L87 Difference]: Start difference. First operand 389 states and 509 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:45,259 INFO L93 Difference]: Finished difference Result 798 states and 1052 transitions. [2021-11-07 08:26:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:26:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 08:26:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:45,263 INFO L225 Difference]: With dead ends: 798 [2021-11-07 08:26:45,263 INFO L226 Difference]: Without dead ends: 440 [2021-11-07 08:26:45,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:26:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-07 08:26:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 402. [2021-11-07 08:26:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.3067331670822944) internal successors, (524), 401 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 524 transitions. [2021-11-07 08:26:45,308 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 524 transitions. Word has length 41 [2021-11-07 08:26:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:45,308 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 524 transitions. [2021-11-07 08:26:45,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 524 transitions. [2021-11-07 08:26:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:26:45,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:45,310 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-07 08:26:45,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:45,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:26:45,517 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2114938615, now seen corresponding path program 6 times [2021-11-07 08:26:45,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:45,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159502079] [2021-11-07 08:26:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:45,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:46,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:46,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159502079] [2021-11-07 08:26:46,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159502079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:46,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989999040] [2021-11-07 08:26:46,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:26:46,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:46,107 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:46,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:26:46,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-07 08:26:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:46,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-07 08:26:46,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:46,750 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:26:46,838 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 87 treesize of output 66 [2021-11-07 08:26:46,841 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 59 treesize of output 38 [2021-11-07 08:26:46,854 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-07 08:26:46,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 36 [2021-11-07 08:26:47,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:47,147 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:26:47,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 200 treesize of output 172 [2021-11-07 08:26:47,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:47,180 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:26:47,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 198 treesize of output 166 [2021-11-07 08:26:47,210 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-07 08:26:47,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 251 [2021-11-07 08:26:47,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:47,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2021-11-07 08:26:47,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 37 [2021-11-07 08:26:48,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:48,444 INFO L354 Elim1Store]: treesize reduction 911, result has 5.4 percent of original size [2021-11-07 08:26:48,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 312 treesize of output 266 [2021-11-07 08:26:48,544 INFO L354 Elim1Store]: treesize reduction 216, result has 12.2 percent of original size [2021-11-07 08:26:48,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 432 [2021-11-07 08:26:48,582 INFO L354 Elim1Store]: treesize reduction 101, result has 16.5 percent of original size [2021-11-07 08:26:48,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 419 [2021-11-07 08:26:48,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:48,636 INFO L354 Elim1Store]: treesize reduction 359, result has 8.9 percent of original size [2021-11-07 08:26:48,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 386 treesize of output 315 [2021-11-07 08:26:48,740 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-07 08:26:48,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 309 treesize of output 201 [2021-11-07 08:26:49,525 INFO L354 Elim1Store]: treesize reduction 235, result has 8.6 percent of original size [2021-11-07 08:26:49,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 15 new quantified variables, introduced 21 case distinctions, treesize of input 312 treesize of output 165 [2021-11-07 08:26:49,603 INFO L354 Elim1Store]: treesize reduction 203, result has 4.7 percent of original size [2021-11-07 08:26:49,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 78 [2021-11-07 08:26:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:26:49,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989999040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:49,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:49,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-11-07 08:26:49,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289708055] [2021-11-07 08:26:49,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:26:49,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:49,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:26:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:26:49,622 INFO L87 Difference]: Start difference. First operand 402 states and 524 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:54,001 INFO L93 Difference]: Finished difference Result 855 states and 1116 transitions. [2021-11-07 08:26:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:26:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 08:26:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:54,006 INFO L225 Difference]: With dead ends: 855 [2021-11-07 08:26:54,006 INFO L226 Difference]: Without dead ends: 484 [2021-11-07 08:26:54,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:26:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-07 08:26:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 428. [2021-11-07 08:26:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.3021077283372364) internal successors, (556), 427 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 556 transitions. [2021-11-07 08:26:54,062 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 556 transitions. Word has length 42 [2021-11-07 08:26:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:54,062 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 556 transitions. [2021-11-07 08:26:54,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 556 transitions. [2021-11-07 08:26:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:26:54,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:54,064 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:54,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:54,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:54,278 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:54,278 INFO L85 PathProgramCache]: Analyzing trace with hash 635507217, now seen corresponding path program 3 times [2021-11-07 08:26:54,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:54,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618724122] [2021-11-07 08:26:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:54,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:54,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:54,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618724122] [2021-11-07 08:26:54,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618724122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:54,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776447043] [2021-11-07 08:26:54,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:26:54,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:54,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:54,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:54,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:26:55,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:26:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:26:55,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-07 08:26:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:55,489 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:26:55,490 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 43 treesize of output 20 [2021-11-07 08:26:55,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:26:55,726 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:26:55,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 154 [2021-11-07 08:26:55,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 203 [2021-11-07 08:26:55,742 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 192 treesize of output 159 [2021-11-07 08:26:55,750 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 148 treesize of output 136 [2021-11-07 08:26:55,802 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:26:55,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 49 [2021-11-07 08:26:56,282 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-07 08:26:56,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-11-07 08:26:56,315 INFO L354 Elim1Store]: treesize reduction 20, result has 50.0 percent of original size [2021-11-07 08:26:56,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 62 [2021-11-07 08:26:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:26:56,350 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 34 treesize of output 14 [2021-11-07 08:26:56,604 INFO L354 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2021-11-07 08:26:56,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 190 treesize of output 118 [2021-11-07 08:26:56,625 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:26:56,625 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 106 treesize of output 90 [2021-11-07 08:26:56,662 INFO L354 Elim1Store]: treesize reduction 47, result has 34.7 percent of original size [2021-11-07 08:26:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 87 [2021-11-07 08:26:57,268 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 108 treesize of output 100 [2021-11-07 08:26:57,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:26:57,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 59 [2021-11-07 08:26:57,505 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 08:26:57,506 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 34 treesize of output 20 [2021-11-07 08:26:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:26:57,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776447043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:57,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:26:57,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-07 08:26:57,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898584128] [2021-11-07 08:26:57,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:26:57,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:57,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:26:57,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:26:57,553 INFO L87 Difference]: Start difference. First operand 428 states and 556 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:17,160 WARN L207 SmtUtils]: Spent 18.13 s on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-11-07 08:27:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:17,440 INFO L93 Difference]: Finished difference Result 839 states and 1097 transitions. [2021-11-07 08:27:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:27:17,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:27:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:17,443 INFO L225 Difference]: With dead ends: 839 [2021-11-07 08:27:17,444 INFO L226 Difference]: Without dead ends: 442 [2021-11-07 08:27:17,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:27:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-07 08:27:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 439. [2021-11-07 08:27:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.2990867579908676) internal successors, (569), 438 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 569 transitions. [2021-11-07 08:27:17,498 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 569 transitions. Word has length 44 [2021-11-07 08:27:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:17,499 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 569 transitions. [2021-11-07 08:27:17,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 569 transitions. [2021-11-07 08:27:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:27:17,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:17,500 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:17,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:17,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:17,728 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:17,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1539931257, now seen corresponding path program 1 times [2021-11-07 08:27:17,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:17,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766329604] [2021-11-07 08:27:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:17,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:27:18,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:18,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766329604] [2021-11-07 08:27:18,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766329604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:18,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591759707] [2021-11-07 08:27:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:18,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:18,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:18,084 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:27:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 08:27:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:18,977 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 112 treesize of output 91 [2021-11-07 08:27:18,980 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 84 treesize of output 63 [2021-11-07 08:27:19,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2021-11-07 08:27:19,014 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 43 treesize of output 31 [2021-11-07 08:27:19,230 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 42 treesize of output 30 [2021-11-07 08:27:19,232 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 27 treesize of output 19 [2021-11-07 08:27:19,266 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 [2021-11-07 08:27:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:27:19,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591759707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:19,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:27:19,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-07 08:27:19,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934879191] [2021-11-07 08:27:19,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:27:19,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:27:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:27:19,311 INFO L87 Difference]: Start difference. First operand 439 states and 569 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 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) [2021-11-07 08:27:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:19,737 INFO L93 Difference]: Finished difference Result 949 states and 1230 transitions. [2021-11-07 08:27:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:27:19,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 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 45 [2021-11-07 08:27:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:19,741 INFO L225 Difference]: With dead ends: 949 [2021-11-07 08:27:19,741 INFO L226 Difference]: Without dead ends: 552 [2021-11-07 08:27:19,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:27:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-07 08:27:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 546. [2021-11-07 08:27:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 1.2880733944954128) internal successors, (702), 545 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 702 transitions. [2021-11-07 08:27:19,814 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 702 transitions. Word has length 45 [2021-11-07 08:27:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:19,815 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 702 transitions. [2021-11-07 08:27:19,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 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) [2021-11-07 08:27:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 702 transitions. [2021-11-07 08:27:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:27:19,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:19,816 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:19,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:20,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:20,040 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash -839681317, now seen corresponding path program 2 times [2021-11-07 08:27:20,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:20,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696044977] [2021-11-07 08:27:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:20,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:27:20,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:20,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696044977] [2021-11-07 08:27:20,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696044977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:20,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978766982] [2021-11-07 08:27:20,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:27:20,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:20,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:20,218 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:20,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:27:20,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:27:20,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:27:20,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:27:21,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978766982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:21,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:27:21,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-11-07 08:27:21,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63841540] [2021-11-07 08:27:21,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:27:21,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:21,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:27:21,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:27:21,131 INFO L87 Difference]: Start difference. First operand 546 states and 702 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2021-11-07 08:27:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:21,584 INFO L93 Difference]: Finished difference Result 1535 states and 1960 transitions. [2021-11-07 08:27:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:27:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) Word has length 45 [2021-11-07 08:27:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:21,591 INFO L225 Difference]: With dead ends: 1535 [2021-11-07 08:27:21,591 INFO L226 Difference]: Without dead ends: 1031 [2021-11-07 08:27:21,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:27:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-11-07 08:27:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 546. [2021-11-07 08:27:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 1.2807339449541284) internal successors, (698), 545 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 698 transitions. [2021-11-07 08:27:21,672 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 698 transitions. Word has length 45 [2021-11-07 08:27:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:21,672 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 698 transitions. [2021-11-07 08:27:21,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2021-11-07 08:27:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 698 transitions. [2021-11-07 08:27:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:27:21,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:21,674 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:21,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:21,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 08:27:21,884 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1232708327, now seen corresponding path program 1 times [2021-11-07 08:27:21,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:21,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211172287] [2021-11-07 08:27:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:21,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:27:22,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:22,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211172287] [2021-11-07 08:27:22,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211172287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:22,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768030916] [2021-11-07 08:27:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:22,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:22,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:22,319 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:22,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:27:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:23,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-07 08:27:23,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:23,208 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 76 treesize of output 55 [2021-11-07 08:27:23,212 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 48 treesize of output 27 [2021-11-07 08:27:23,708 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:27:23,708 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 117 treesize of output 93 [2021-11-07 08:27:23,722 INFO L354 Elim1Store]: treesize reduction 99, result has 2.9 percent of original size [2021-11-07 08:27:23,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 71 [2021-11-07 08:27:23,766 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:27:23,766 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 71 treesize of output 51 [2021-11-07 08:27:23,955 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-11-07 08:27:23,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 108 [2021-11-07 08:27:23,984 INFO L354 Elim1Store]: treesize reduction 84, result has 16.8 percent of original size [2021-11-07 08:27:23,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 108 [2021-11-07 08:27:23,996 INFO L354 Elim1Store]: treesize reduction 65, result has 20.7 percent of original size [2021-11-07 08:27:23,997 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 119 treesize of output 83 [2021-11-07 08:27:24,138 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 48 treesize of output 36 [2021-11-07 08:27:24,141 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 33 treesize of output 21 [2021-11-07 08:27:24,159 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 [2021-11-07 08:27:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:27:24,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768030916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:24,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:27:24,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-11-07 08:27:24,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197577955] [2021-11-07 08:27:24,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:27:24,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:24,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:27:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:27:24,171 INFO L87 Difference]: Start difference. First operand 546 states and 698 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:27,044 INFO L93 Difference]: Finished difference Result 1402 states and 1817 transitions. [2021-11-07 08:27:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:27:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 08:27:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:27,049 INFO L225 Difference]: With dead ends: 1402 [2021-11-07 08:27:27,049 INFO L226 Difference]: Without dead ends: 1005 [2021-11-07 08:27:27,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=533, Invalid=2223, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:27:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-11-07 08:27:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 732. [2021-11-07 08:27:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 1.2900136798905608) internal successors, (943), 731 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 943 transitions. [2021-11-07 08:27:27,149 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 943 transitions. Word has length 45 [2021-11-07 08:27:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:27,150 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 943 transitions. [2021-11-07 08:27:27,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 943 transitions. [2021-11-07 08:27:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:27:27,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:27,151 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:27,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:27,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:27:27,376 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1639477204, now seen corresponding path program 2 times [2021-11-07 08:27:27,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:27,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285160173] [2021-11-07 08:27:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:27,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:27:27,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:27,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285160173] [2021-11-07 08:27:27,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285160173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:27,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205768281] [2021-11-07 08:27:27,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:27:27,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:27,896 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:27,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:27:28,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:27:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-07 08:27:28,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:28,818 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 77 treesize of output 56 [2021-11-07 08:27:28,823 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 49 treesize of output 28 [2021-11-07 08:27:28,828 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 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-07 08:27:29,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:27:29,154 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:27:29,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 188 treesize of output 160 [2021-11-07 08:27:29,178 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 08:27:29,179 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 155 treesize of output 155 [2021-11-07 08:27:29,209 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:27:29,209 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 1 case distinctions, treesize of input 137 treesize of output 129 [2021-11-07 08:27:29,220 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 119 treesize of output 94 [2021-11-07 08:27:29,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:27:29,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 29 [2021-11-07 08:27:30,230 INFO L354 Elim1Store]: treesize reduction 228, result has 13.3 percent of original size [2021-11-07 08:27:30,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 130 [2021-11-07 08:27:30,298 INFO L354 Elim1Store]: treesize reduction 236, result has 10.9 percent of original size [2021-11-07 08:27:30,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 115 [2021-11-07 08:27:30,844 INFO L354 Elim1Store]: treesize reduction 264, result has 8.7 percent of original size [2021-11-07 08:27:30,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 225 treesize of output 140 [2021-11-07 08:27:30,880 INFO L354 Elim1Store]: treesize reduction 160, result has 10.1 percent of original size [2021-11-07 08:27:30,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 164 treesize of output 93 [2021-11-07 08:27:31,530 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-07 08:27:31,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 66 [2021-11-07 08:27:31,536 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-07 08:27:31,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 30 [2021-11-07 08:27:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:27:31,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205768281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:31,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:27:31,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-11-07 08:27:31,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145554383] [2021-11-07 08:27:31,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:27:31,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:27:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:27:31,564 INFO L87 Difference]: Start difference. First operand 732 states and 943 transitions. Second operand has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:52,723 INFO L93 Difference]: Finished difference Result 3126 states and 4056 transitions. [2021-11-07 08:27:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 08:27:52,723 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 08:27:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:52,734 INFO L225 Difference]: With dead ends: 3126 [2021-11-07 08:27:52,734 INFO L226 Difference]: Without dead ends: 2484 [2021-11-07 08:27:52,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1113, Invalid=5207, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 08:27:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-11-07 08:27:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1452. [2021-11-07 08:27:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 1.29565816678153) internal successors, (1880), 1451 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 1880 transitions. [2021-11-07 08:27:53,001 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 1880 transitions. Word has length 48 [2021-11-07 08:27:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:53,002 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 1880 transitions. [2021-11-07 08:27:53,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:53,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 1880 transitions. [2021-11-07 08:27:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:27:53,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:53,003 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:53,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:53,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:53,218 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:53,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1975238529, now seen corresponding path program 3 times [2021-11-07 08:27:53,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:53,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291051993] [2021-11-07 08:27:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:53,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:27:53,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:53,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291051993] [2021-11-07 08:27:53,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291051993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:53,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967056975] [2021-11-07 08:27:53,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:27:53,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:53,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:53,594 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:53,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:27:54,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:27:54,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:54,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-07 08:27:54,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:54,928 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 80 treesize of output 59 [2021-11-07 08:27:54,933 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 0 case distinctions, treesize of input 69 treesize of output 68 [2021-11-07 08:27:54,936 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 68 treesize of output 35 [2021-11-07 08:27:55,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:27:55,634 INFO L354 Elim1Store]: treesize reduction 536, result has 7.1 percent of original size [2021-11-07 08:27:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 231 treesize of output 210 [2021-11-07 08:27:55,715 INFO L354 Elim1Store]: treesize reduction 116, result has 16.5 percent of original size [2021-11-07 08:27:55,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 296 [2021-11-07 08:27:55,743 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-07 08:27:55,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 303 treesize of output 269 [2021-11-07 08:27:55,764 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-07 08:27:55,764 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 276 treesize of output 276 [2021-11-07 08:27:55,787 INFO L354 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2021-11-07 08:27:55,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 270 treesize of output 223 [2021-11-07 08:27:55,855 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-07 08:27:55,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 215 treesize of output 128 [2021-11-07 08:27:56,252 INFO L354 Elim1Store]: treesize reduction 122, result has 5.4 percent of original size [2021-11-07 08:27:56,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 181 treesize of output 106 [2021-11-07 08:27:56,275 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-07 08:27:56,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 51 [2021-11-07 08:27:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:27:56,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967056975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:56,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:27:56,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-07 08:27:56,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436974465] [2021-11-07 08:27:56,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:27:56,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:56,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:27:56,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:27:56,289 INFO L87 Difference]: Start difference. First operand 1452 states and 1880 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:59,305 INFO L93 Difference]: Finished difference Result 2529 states and 3281 transitions. [2021-11-07 08:27:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:27:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 08:27:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:59,313 INFO L225 Difference]: With dead ends: 2529 [2021-11-07 08:27:59,313 INFO L226 Difference]: Without dead ends: 1528 [2021-11-07 08:27:59,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:27:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-11-07 08:27:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1452. [2021-11-07 08:27:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 1.29565816678153) internal successors, (1880), 1451 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 1880 transitions. [2021-11-07 08:27:59,535 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 1880 transitions. Word has length 52 [2021-11-07 08:27:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:59,535 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 1880 transitions. [2021-11-07 08:27:59,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 1880 transitions. [2021-11-07 08:27:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:27:59,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:59,537 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:59,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:59,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:27:59,764 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1417002438, now seen corresponding path program 3 times [2021-11-07 08:27:59,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:59,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225087336] [2021-11-07 08:27:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:59,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 19 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:27:59,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:59,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225087336] [2021-11-07 08:27:59,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225087336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:59,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319876593] [2021-11-07 08:27:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:27:59,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:59,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:59,844 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:59,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:28:01,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:28:01,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:01,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 08:28:01,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:01,144 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:28:01,145 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 43 treesize of output 20 [2021-11-07 08:28:01,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 146 [2021-11-07 08:28:01,320 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 139 treesize of output 118 [2021-11-07 08:28:01,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:28:01,346 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:28:01,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 114 [2021-11-07 08:28:01,357 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 150 treesize of output 138 [2021-11-07 08:28:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:28:01,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2021-11-07 08:28:01,906 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-07 08:28:01,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-11-07 08:28:01,931 INFO L354 Elim1Store]: treesize reduction 20, result has 50.0 percent of original size [2021-11-07 08:28:01,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 62 [2021-11-07 08:28:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:28:01,982 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 34 treesize of output 14 [2021-11-07 08:28:02,149 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:28:02,150 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 111 treesize of output 95 [2021-11-07 08:28:02,182 INFO L354 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2021-11-07 08:28:02,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 74 [2021-11-07 08:28:02,218 INFO L354 Elim1Store]: treesize reduction 32, result has 55.6 percent of original size [2021-11-07 08:28:02,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 98 [2021-11-07 08:28:02,554 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 74 treesize of output 66 [2021-11-07 08:28:02,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:28:02,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 34 [2021-11-07 08:28:02,611 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 [2021-11-07 08:28:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:28:02,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319876593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:02,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:02,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 19 [2021-11-07 08:28:02,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6947416] [2021-11-07 08:28:02,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:28:02,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:28:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:28:02,646 INFO L87 Difference]: Start difference. First operand 1452 states and 1880 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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) [2021-11-07 08:28:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:06,640 INFO L93 Difference]: Finished difference Result 4120 states and 5421 transitions. [2021-11-07 08:28:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:28:06,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 57 [2021-11-07 08:28:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:06,657 INFO L225 Difference]: With dead ends: 4120 [2021-11-07 08:28:06,657 INFO L226 Difference]: Without dead ends: 3038 [2021-11-07 08:28:06,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=631, Invalid=3029, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:28:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-11-07 08:28:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2593. [2021-11-07 08:28:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 1.3005401234567902) internal successors, (3371), 2592 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 3371 transitions. [2021-11-07 08:28:06,995 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 3371 transitions. Word has length 57 [2021-11-07 08:28:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:06,995 INFO L470 AbstractCegarLoop]: Abstraction has 2593 states and 3371 transitions. [2021-11-07 08:28:06,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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) [2021-11-07 08:28:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 3371 transitions. [2021-11-07 08:28:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:28:06,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:06,997 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:07,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:07,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:28:07,199 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1289616956, now seen corresponding path program 4 times [2021-11-07 08:28:07,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:07,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825446907] [2021-11-07 08:28:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:07,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:28:07,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:07,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825446907] [2021-11-07 08:28:07,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825446907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:07,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935152207] [2021-11-07 08:28:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:28:07,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:07,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:07,582 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:07,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:28:08,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:28:08,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 08:28:08,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:08,799 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:28:08,799 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 49 treesize of output 26 [2021-11-07 08:28:08,803 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 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-07 08:28:09,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:28:09,130 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:28:09,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 128 [2021-11-07 08:28:09,143 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-07 08:28:09,143 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 188 treesize of output 188 [2021-11-07 08:28:09,149 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 182 treesize of output 149 [2021-11-07 08:28:09,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:28:09,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2021-11-07 08:28:09,921 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-07 08:28:09,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 112 [2021-11-07 08:28:09,943 INFO L354 Elim1Store]: treesize reduction 99, result has 2.9 percent of original size [2021-11-07 08:28:09,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 100 [2021-11-07 08:28:09,957 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:28:09,958 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 100 treesize of output 80 [2021-11-07 08:28:10,270 INFO L354 Elim1Store]: treesize reduction 156, result has 13.3 percent of original size [2021-11-07 08:28:10,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 119 [2021-11-07 08:28:10,288 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-07 08:28:10,289 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 155 [2021-11-07 08:28:10,307 INFO L354 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2021-11-07 08:28:10,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 138 treesize of output 103 [2021-11-07 08:28:10,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:28:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 48 [2021-11-07 08:28:10,699 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 33 treesize of output 21 [2021-11-07 08:28:10,744 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 [2021-11-07 08:28:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:28:10,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935152207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:10,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:10,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-11-07 08:28:10,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674406866] [2021-11-07 08:28:10,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:28:10,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:28:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:28:10,781 INFO L87 Difference]: Start difference. First operand 2593 states and 3371 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:14,712 INFO L93 Difference]: Finished difference Result 4911 states and 6460 transitions. [2021-11-07 08:28:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:28:14,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 08:28:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:14,727 INFO L225 Difference]: With dead ends: 4911 [2021-11-07 08:28:14,727 INFO L226 Difference]: Without dead ends: 2933 [2021-11-07 08:28:14,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:28:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-11-07 08:28:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2623. [2021-11-07 08:28:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 1.2879481311975591) internal successors, (3377), 2622 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 3377 transitions. [2021-11-07 08:28:15,040 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 3377 transitions. Word has length 57 [2021-11-07 08:28:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:15,041 INFO L470 AbstractCegarLoop]: Abstraction has 2623 states and 3377 transitions. [2021-11-07 08:28:15,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 3377 transitions. [2021-11-07 08:28:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:28:15,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:15,043 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:15,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:15,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:15,244 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:15,245 INFO L85 PathProgramCache]: Analyzing trace with hash 490344032, now seen corresponding path program 3 times [2021-11-07 08:28:15,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:15,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617242345] [2021-11-07 08:28:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:15,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:28:15,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:15,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617242345] [2021-11-07 08:28:15,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617242345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:15,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386309798] [2021-11-07 08:28:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:28:15,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:15,516 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:15,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:28:17,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:28:17,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-07 08:28:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 55 [2021-11-07 08:28:17,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 27 [2021-11-07 08:28:18,173 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-07 08:28:18,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 112 [2021-11-07 08:28:18,190 INFO L354 Elim1Store]: treesize reduction 99, result has 2.9 percent of original size [2021-11-07 08:28:18,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 88 [2021-11-07 08:28:18,213 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:28:18,214 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 1 case distinctions, treesize of input 88 treesize of output 64 [2021-11-07 08:28:18,512 INFO L354 Elim1Store]: treesize reduction 90, result has 28.0 percent of original size [2021-11-07 08:28:18,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 119 [2021-11-07 08:28:18,526 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:28:18,526 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 1 case distinctions, treesize of input 122 treesize of output 94 [2021-11-07 08:28:18,563 INFO L354 Elim1Store]: treesize reduction 32, result has 55.6 percent of original size [2021-11-07 08:28:18,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 100 [2021-11-07 08:28:19,170 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 79 treesize of output 71 [2021-11-07 08:28:19,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:28:19,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-07 08:28:19,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:28:19,253 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 25 treesize of output 25 [2021-11-07 08:28:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:28:19,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386309798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:19,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:19,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 24 [2021-11-07 08:28:19,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939423115] [2021-11-07 08:28:19,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:28:19,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:19,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:28:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:28:19,296 INFO L87 Difference]: Start difference. First operand 2623 states and 3377 transitions. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:35,772 INFO L93 Difference]: Finished difference Result 4927 states and 6314 transitions. [2021-11-07 08:28:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 08:28:35,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 08:28:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:35,788 INFO L225 Difference]: With dead ends: 4927 [2021-11-07 08:28:35,788 INFO L226 Difference]: Without dead ends: 3416 [2021-11-07 08:28:35,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=947, Invalid=4753, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 08:28:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-11-07 08:28:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2739. [2021-11-07 08:28:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 1.2969320672023374) internal successors, (3551), 2738 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3551 transitions. [2021-11-07 08:28:36,127 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3551 transitions. Word has length 57 [2021-11-07 08:28:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:36,127 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 3551 transitions. [2021-11-07 08:28:36,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3551 transitions. [2021-11-07 08:28:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:28:36,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:36,129 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-11-07 08:28:36,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:36,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:28:36,332 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1765709261, now seen corresponding path program 7 times [2021-11-07 08:28:36,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:36,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671887074] [2021-11-07 08:28:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:36,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:28:37,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:37,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671887074] [2021-11-07 08:28:37,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671887074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:37,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578644823] [2021-11-07 08:28:37,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:28:37,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:37,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:37,932 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:37,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:28:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 190 conjunts are in the unsatisfiable core [2021-11-07 08:28:39,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:39,414 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:28:39,499 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 87 treesize of output 66 [2021-11-07 08:28:39,503 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 59 treesize of output 38 [2021-11-07 08:28:39,519 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-07 08:28:39,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 36 [2021-11-07 08:28:39,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:28:39,856 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:28:39,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 200 treesize of output 172 [2021-11-07 08:28:39,892 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-07 08:28:39,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 172 [2021-11-07 08:28:39,917 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:28:39,917 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 1 case distinctions, treesize of input 154 treesize of output 142 [2021-11-07 08:28:39,936 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 136 treesize of output 107 [2021-11-07 08:28:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:28:39,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 29 [2021-11-07 08:28:40,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:28:40,689 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-11-07 08:28:40,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 240 treesize of output 205 [2021-11-07 08:28:40,713 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 08:28:40,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 335 treesize of output 314 [2021-11-07 08:28:40,791 INFO L354 Elim1Store]: treesize reduction 226, result has 19.9 percent of original size [2021-11-07 08:28:40,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 308 treesize of output 330 [2021-11-07 08:28:40,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:28:40,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 318 treesize of output 297 [2021-11-07 08:28:40,836 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-11-07 08:28:40,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 257 [2021-11-07 08:28:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:28:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:28:40,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 48 [2021-11-07 08:28:42,895 INFO L354 Elim1Store]: treesize reduction 938, result has 7.6 percent of original size [2021-11-07 08:28:42,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 391 treesize of output 387 [2021-11-07 08:28:42,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:28:43,281 INFO L354 Elim1Store]: treesize reduction 988, result has 5.6 percent of original size [2021-11-07 08:28:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 399 treesize of output 315 [2021-11-07 08:28:43,375 INFO L354 Elim1Store]: treesize reduction 272, result has 6.2 percent of original size [2021-11-07 08:28:43,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 615 treesize of output 520 [2021-11-07 08:28:43,411 INFO L354 Elim1Store]: treesize reduction 131, result has 23.8 percent of original size [2021-11-07 08:28:43,412 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 482 treesize of output 470 [2021-11-07 08:28:43,424 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-07 08:28:43,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 467 treesize of output 433 [2021-11-07 08:28:43,455 INFO L354 Elim1Store]: treesize reduction 136, result has 20.5 percent of original size [2021-11-07 08:28:43,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 422 treesize of output 391 [2021-11-07 08:28:43,480 INFO L354 Elim1Store]: treesize reduction 217, result has 10.0 percent of original size [2021-11-07 08:28:43,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 382 treesize of output 356 [2021-11-07 08:28:43,600 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-07 08:28:43,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 310 treesize of output 203 [2021-11-07 08:28:44,758 INFO L354 Elim1Store]: treesize reduction 215, result has 9.3 percent of original size [2021-11-07 08:28:44,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 341 treesize of output 163 [2021-11-07 08:28:44,809 INFO L354 Elim1Store]: treesize reduction 183, result has 5.2 percent of original size [2021-11-07 08:28:44,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 86 [2021-11-07 08:28:44,844 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 [2021-11-07 08:28:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 78 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:28:44,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578644823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:44,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:44,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 33 [2021-11-07 08:28:44,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603013897] [2021-11-07 08:28:44,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 08:28:44,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 08:28:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:28:44,853 INFO L87 Difference]: Start difference. First operand 2739 states and 3551 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:53,535 INFO L93 Difference]: Finished difference Result 2821 states and 3650 transitions. [2021-11-07 08:28:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:28:53,536 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 08:28:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:53,548 INFO L225 Difference]: With dead ends: 2821 [2021-11-07 08:28:53,549 INFO L226 Difference]: Without dead ends: 2819 [2021-11-07 08:28:53,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=358, Invalid=1712, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:28:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-11-07 08:28:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2761. [2021-11-07 08:28:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2760 states have (on average 1.2967391304347826) internal successors, (3579), 2760 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3579 transitions. [2021-11-07 08:28:53,851 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3579 transitions. Word has length 58 [2021-11-07 08:28:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:53,851 INFO L470 AbstractCegarLoop]: Abstraction has 2761 states and 3579 transitions. [2021-11-07 08:28:53,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3579 transitions. [2021-11-07 08:28:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:28:53,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:53,853 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:53,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:54,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:28:54,068 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1204742776, now seen corresponding path program 3 times [2021-11-07 08:28:54,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:54,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571976221] [2021-11-07 08:28:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:54,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:28:54,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:54,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571976221] [2021-11-07 08:28:54,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571976221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:54,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816418230] [2021-11-07 08:28:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:28:54,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:54,681 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:54,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:28:56,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 08:28:56,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:56,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-07 08:28:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:56,560 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 80 treesize of output 59 [2021-11-07 08:28:56,564 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 52 treesize of output 31 [2021-11-07 08:28:56,583 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 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 08:28:57,042 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:28:57,042 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 69 treesize of output 45 [2021-11-07 08:28:57,055 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:28:57,055 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 42 treesize of output 26 [2021-11-07 08:28:57,261 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-07 08:28:57,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 63 [2021-11-07 08:28:57,287 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-11-07 08:28:57,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 68 [2021-11-07 08:28:57,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:28:57,943 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:28:57,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 252 treesize of output 216 [2021-11-07 08:28:58,000 INFO L354 Elim1Store]: treesize reduction 306, result has 6.4 percent of original size [2021-11-07 08:28:58,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 320 treesize of output 312 [2021-11-07 08:28:58,036 INFO L354 Elim1Store]: treesize reduction 71, result has 22.8 percent of original size [2021-11-07 08:28:58,037 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 285 treesize of output 273 [2021-11-07 08:28:58,056 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 08:28:58,057 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 270 treesize of output 242 [2021-11-07 08:28:58,063 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 243 treesize of output 215 [2021-11-07 08:28:58,077 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-07 08:28:58,077 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 210 treesize of output 210 [2021-11-07 08:28:58,083 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 204 treesize of output 167 [2021-11-07 08:28:58,135 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:28:58,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 68 [2021-11-07 08:28:58,480 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-07 08:28:58,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 58 [2021-11-07 08:28:58,494 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-07 08:28:58,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 39 [2021-11-07 08:28:58,520 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 [2021-11-07 08:28:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 51 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:28:58,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816418230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:58,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:28:58,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-11-07 08:28:58,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443273461] [2021-11-07 08:28:58,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:28:58,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:28:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:28:58,529 INFO L87 Difference]: Start difference. First operand 2761 states and 3579 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:15,734 INFO L93 Difference]: Finished difference Result 4386 states and 5568 transitions. [2021-11-07 08:29:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 08:29:15,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 08:29:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:15,760 INFO L225 Difference]: With dead ends: 4386 [2021-11-07 08:29:15,760 INFO L226 Difference]: Without dead ends: 4384 [2021-11-07 08:29:15,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=696, Invalid=2610, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 08:29:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-11-07 08:29:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3006. [2021-11-07 08:29:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 1.2905158069883527) internal successors, (3878), 3005 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 3878 transitions. [2021-11-07 08:29:16,119 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 3878 transitions. Word has length 58 [2021-11-07 08:29:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:16,119 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 3878 transitions. [2021-11-07 08:29:16,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 23 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 3878 transitions. [2021-11-07 08:29:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:29:16,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:16,121 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-11-07 08:29:16,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:16,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:16,332 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:16,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1776208686, now seen corresponding path program 8 times [2021-11-07 08:29:16,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:16,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911665139] [2021-11-07 08:29:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:16,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:29:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 10 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:18,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:18,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911665139] [2021-11-07 08:29:18,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911665139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:18,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341591778] [2021-11-07 08:29:18,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:29:18,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:18,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:18,155 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:18,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:29:19,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:29:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:19,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 196 conjunts are in the unsatisfiable core [2021-11-07 08:29:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:19,964 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:29:20,069 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 87 treesize of output 66 [2021-11-07 08:29:20,074 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 59 treesize of output 38 [2021-11-07 08:29:20,094 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-07 08:29:20,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 36 [2021-11-07 08:29:20,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:29:20,899 INFO L354 Elim1Store]: treesize reduction 462, result has 7.4 percent of original size [2021-11-07 08:29:20,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 236 treesize of output 217 [2021-11-07 08:29:20,920 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 08:29:20,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 210 treesize of output 184 [2021-11-07 08:29:20,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:29:20,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 169 [2021-11-07 08:29:20,949 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:29:20,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 141 [2021-11-07 08:29:20,987 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-07 08:29:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 213 treesize of output 236 [2021-11-07 08:29:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 47 [2021-11-07 08:29:21,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:29:21,985 INFO L354 Elim1Store]: treesize reduction 188, result has 26.3 percent of original size [2021-11-07 08:29:21,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 287 treesize of output 291 [2021-11-07 08:29:22,011 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 08:29:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 288 treesize of output 224 [2021-11-07 08:29:22,025 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:29:22,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 273 treesize of output 209 [2021-11-07 08:29:22,053 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-07 08:29:22,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 258 treesize of output 181 [2021-11-07 08:29:22,104 INFO L354 Elim1Store]: treesize reduction 226, result has 19.9 percent of original size [2021-11-07 08:29:22,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 319 treesize of output 341 [2021-11-07 08:29:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:29:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 47 [2021-11-07 08:29:23,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:29:24,124 INFO L354 Elim1Store]: treesize reduction 344, result has 23.4 percent of original size [2021-11-07 08:29:24,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 368 treesize of output 394 [2021-11-07 08:29:24,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:29:24,244 INFO L354 Elim1Store]: treesize reduction 152, result has 27.3 percent of original size [2021-11-07 08:29:24,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 411 treesize of output 290 [2021-11-07 08:29:24,303 INFO L354 Elim1Store]: treesize reduction 217, result has 10.0 percent of original size [2021-11-07 08:29:24,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 624 treesize of output 598 [2021-11-07 08:29:24,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:29:24,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:29:24,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:29:24,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:29:24,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:29:24,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 38 [2021-11-07 08:29:24,545 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-07 08:29:24,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 407 treesize of output 167 [2021-11-07 08:29:26,469 INFO L354 Elim1Store]: treesize reduction 380, result has 6.2 percent of original size [2021-11-07 08:29:26,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 19 new quantified variables, introduced 36 case distinctions, treesize of input 555 treesize of output 211 [2021-11-07 08:29:26,608 INFO L354 Elim1Store]: treesize reduction 332, result has 3.8 percent of original size [2021-11-07 08:29:26,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 112 treesize of output 96 [2021-11-07 08:29:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 28 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:29:26,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341591778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:26,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:29:26,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2021-11-07 08:29:26,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807411557] [2021-11-07 08:29:26,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 08:29:26,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 08:29:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:29:26,640 INFO L87 Difference]: Start difference. First operand 3006 states and 3878 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 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) [2021-11-07 08:30:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:00,316 INFO L93 Difference]: Finished difference Result 4903 states and 6331 transitions. [2021-11-07 08:30:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:30:00,317 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 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) Word has length 61 [2021-11-07 08:30:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:00,327 INFO L225 Difference]: With dead ends: 4903 [2021-11-07 08:30:00,328 INFO L226 Difference]: Without dead ends: 3157 [2021-11-07 08:30:00,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=327, Invalid=3095, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:30:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-11-07 08:30:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3062. [2021-11-07 08:30:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 1.28781443972558) internal successors, (3942), 3061 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:30:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 3942 transitions. [2021-11-07 08:30:00,697 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 3942 transitions. Word has length 61 [2021-11-07 08:30:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:00,698 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 3942 transitions. [2021-11-07 08:30:00,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 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) [2021-11-07 08:30:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 3942 transitions. [2021-11-07 08:30:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:30:00,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:00,699 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:00,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:30:00,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:00,904 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:00,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:00,904 INFO L85 PathProgramCache]: Analyzing trace with hash 376158840, now seen corresponding path program 5 times [2021-11-07 08:30:00,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:30:00,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565351175] [2021-11-07 08:30:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:00,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:30:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:30:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 59 proven. 71 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:30:01,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:01,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565351175] [2021-11-07 08:30:01,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565351175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:01,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20039930] [2021-11-07 08:30:01,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:30:01,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:01,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:01,572 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:01,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:30:04,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 08:30:04,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:30:04,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-07 08:30:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:04,950 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 40 treesize of output 19 [2021-11-07 08:30:05,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:30:05,167 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:30:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 121 [2021-11-07 08:30:05,174 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 0 case distinctions, treesize of input 173 treesize of output 172 [2021-11-07 08:30:05,179 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 172 treesize of output 139 [2021-11-07 08:30:05,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2021-11-07 08:30:05,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:30:05,616 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:30:05,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 181 [2021-11-07 08:30:05,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:30:05,663 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-11-07 08:30:05,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 184 [2021-11-07 08:30:05,687 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-07 08:30:05,687 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 286 treesize of output 286 [2021-11-07 08:30:05,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:30:05,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 37 [2021-11-07 08:30:05,781 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-07 08:30:05,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 87 [2021-11-07 08:30:06,632 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 08:30:06,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 108 [2021-11-07 08:30:06,659 INFO L354 Elim1Store]: treesize reduction 110, result has 16.7 percent of original size [2021-11-07 08:30:06,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 70 [2021-11-07 08:30:06,705 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-07 08:30:06,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 85 [2021-11-07 08:30:06,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:30:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:30:06,810 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:30:06,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 49 [2021-11-07 08:30:06,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:30:06,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 28 [2021-11-07 08:30:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 47 proven. 82 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 08:30:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20039930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:06,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:30:06,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-11-07 08:30:06,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488363470] [2021-11-07 08:30:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:30:06,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:30:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:30:06,887 INFO L87 Difference]: Start difference. First operand 3062 states and 3942 transitions. Second operand has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:30:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:19,892 INFO L93 Difference]: Finished difference Result 5642 states and 7287 transitions. [2021-11-07 08:30:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:30:19,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:30:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:19,900 INFO L225 Difference]: With dead ends: 5642 [2021-11-07 08:30:19,900 INFO L226 Difference]: Without dead ends: 2999 [2021-11-07 08:30:19,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:30:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2021-11-07 08:30:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2889. [2021-11-07 08:30:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2888 states have (on average 1.2877423822714682) internal successors, (3719), 2888 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:30:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 3719 transitions. [2021-11-07 08:30:20,292 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 3719 transitions. Word has length 63 [2021-11-07 08:30:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:20,292 INFO L470 AbstractCegarLoop]: Abstraction has 2889 states and 3719 transitions. [2021-11-07 08:30:20,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:30:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 3719 transitions. [2021-11-07 08:30:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:30:20,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:20,294 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:20,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:30:20,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 08:30:20,520 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash -142759019, now seen corresponding path program 6 times [2021-11-07 08:30:20,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:30:20,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607019883] [2021-11-07 08:30:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:20,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:30:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:30:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:30:22,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:22,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607019883] [2021-11-07 08:30:22,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607019883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:22,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729282108] [2021-11-07 08:30:22,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:30:22,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:22,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:22,025 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:22,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:30:24,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-07 08:30:24,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:30:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 178 conjunts are in the unsatisfiable core [2021-11-07 08:30:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:24,877 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:30:25,003 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:30:25,004 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 50 treesize of output 27 [2021-11-07 08:30:25,011 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 08:30:25,012 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 15 treesize of output 15 [2021-11-07 08:30:25,252 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 118 treesize of output 97 [2021-11-07 08:30:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:30:25,282 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:30:25,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 93 [2021-11-07 08:30:25,289 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 0 case distinctions, treesize of input 129 treesize of output 128 [2021-11-07 08:30:25,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:30:25,349 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:30:25,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 48 [2021-11-07 08:30:25,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 212 [2021-11-07 08:30:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:30:25,877 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:30:25,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 231 treesize of output 203 [2021-11-07 08:30:25,901 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 08:30:25,901 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 198 treesize of output 198 [2021-11-07 08:30:25,939 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:30:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 170 [2021-11-07 08:30:25,971 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:30:25,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 135 [2021-11-07 08:30:25,978 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 187 treesize of output 175 [2021-11-07 08:30:26,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:30:26,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 29 [2021-11-07 08:30:27,020 INFO L354 Elim1Store]: treesize reduction 110, result has 16.7 percent of original size [2021-11-07 08:30:27,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 117 [2021-11-07 08:30:27,036 INFO L354 Elim1Store]: treesize reduction 37, result has 7.5 percent of original size [2021-11-07 08:30:27,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 99 [2021-11-07 08:30:27,058 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-07 08:30:27,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 74 [2021-11-07 08:30:27,453 INFO L354 Elim1Store]: treesize reduction 212, result has 14.2 percent of original size [2021-11-07 08:30:27,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 142 [2021-11-07 08:30:27,493 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-07 08:30:27,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 145 [2021-11-07 08:30:27,508 INFO L354 Elim1Store]: treesize reduction 61, result has 15.3 percent of original size [2021-11-07 08:30:27,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 120 [2021-11-07 08:30:27,989 INFO L354 Elim1Store]: treesize reduction 284, result has 17.0 percent of original size [2021-11-07 08:30:27,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 499 treesize of output 195 [2021-11-07 08:30:28,055 INFO L354 Elim1Store]: treesize reduction 146, result has 18.9 percent of original size [2021-11-07 08:30:28,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 196 treesize of output 163 [2021-11-07 08:30:28,101 INFO L354 Elim1Store]: treesize reduction 48, result has 52.9 percent of original size [2021-11-07 08:30:28,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 180 [2021-11-07 08:30:34,191 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-07 08:30:34,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 149 [2021-11-07 08:30:34,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:30:34,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 117 [2021-11-07 08:30:34,471 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 [2021-11-07 08:30:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 99 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:30:34,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729282108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:34,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:30:34,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2021-11-07 08:30:34,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126586927] [2021-11-07 08:30:34,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:30:34,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:30:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:30:34,522 INFO L87 Difference]: Start difference. First operand 2889 states and 3719 transitions. Second operand has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:11,912 INFO L93 Difference]: Finished difference Result 3708 states and 4743 transitions. [2021-11-07 08:32:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:32:11,913 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:32:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:11,920 INFO L225 Difference]: With dead ends: 3708 [2021-11-07 08:32:11,920 INFO L226 Difference]: Without dead ends: 3706 [2021-11-07 08:32:11,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=697, Invalid=4982, Unknown=21, NotChecked=0, Total=5700 [2021-11-07 08:32:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-11-07 08:32:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3378. [2021-11-07 08:32:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 1.2857565886881848) internal successors, (4342), 3377 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 4342 transitions. [2021-11-07 08:32:12,460 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 4342 transitions. Word has length 63 [2021-11-07 08:32:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:12,461 INFO L470 AbstractCegarLoop]: Abstraction has 3378 states and 4342 transitions. [2021-11-07 08:32:12,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 4342 transitions. [2021-11-07 08:32:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:32:12,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:12,463 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:12,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:32:12,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:12,690 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -483186811, now seen corresponding path program 4 times [2021-11-07 08:32:12,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:12,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912806588] [2021-11-07 08:32:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:12,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:32:13,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:13,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912806588] [2021-11-07 08:32:13,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912806588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:13,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847382268] [2021-11-07 08:32:13,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:32:13,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:13,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:13,374 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:32:13,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:32:15,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:32:15,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:32:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-07 08:32:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:32:15,965 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 116 treesize of output 95 [2021-11-07 08:32:15,969 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 88 treesize of output 67 [2021-11-07 08:32:15,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 62 [2021-11-07 08:32:15,976 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 0 case distinctions, treesize of input 51 treesize of output 50 [2021-11-07 08:32:15,979 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 50 treesize of output 38 [2021-11-07 08:32:16,713 INFO L354 Elim1Store]: treesize reduction 233, result has 15.3 percent of original size [2021-11-07 08:32:16,713 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 3 case distinctions, treesize of input 237 treesize of output 241 [2021-11-07 08:32:17,172 INFO L354 Elim1Store]: treesize reduction 501, result has 16.6 percent of original size [2021-11-07 08:32:17,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 695 treesize of output 443 [2021-11-07 08:32:17,403 INFO L354 Elim1Store]: treesize reduction 581, result has 18.1 percent of original size [2021-11-07 08:32:17,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 716 treesize of output 636 [2021-11-07 08:32:17,466 INFO L354 Elim1Store]: treesize reduction 158, result has 13.7 percent of original size [2021-11-07 08:32:17,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 876 treesize of output 870 [2021-11-07 08:32:17,500 INFO L354 Elim1Store]: treesize reduction 4, result has 84.6 percent of original size [2021-11-07 08:32:17,501 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 861 treesize of output 861 [2021-11-07 08:32:18,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:18,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:18,232 INFO L354 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2021-11-07 08:32:18,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 426 treesize of output 374 [2021-11-07 08:32:18,542 INFO L354 Elim1Store]: treesize reduction 71, result has 16.5 percent of original size [2021-11-07 08:32:18,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 804 treesize of output 571 [2021-11-07 08:32:20,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:20,941 INFO L354 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2021-11-07 08:32:20,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 236 [2021-11-07 08:32:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:20,962 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-11-07 08:32:20,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 226 treesize of output 153 [2021-11-07 08:32:21,802 INFO L354 Elim1Store]: treesize reduction 101, result has 17.2 percent of original size [2021-11-07 08:32:21,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 155 [2021-11-07 08:32:21,830 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-07 08:32:21,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 87 [2021-11-07 08:32:21,853 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-07 08:32:21,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 72 [2021-11-07 08:32:21,932 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-07 08:32:21,933 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 54 [2021-11-07 08:32:21,938 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:32:21,938 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2021-11-07 08:32:21,962 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 [2021-11-07 08:32:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 87 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 08:32:22,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847382268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:22,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:32:22,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-11-07 08:32:22,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136849312] [2021-11-07 08:32:22,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:32:22,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:32:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:32:22,017 INFO L87 Difference]: Start difference. First operand 3378 states and 4342 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:23,846 INFO L93 Difference]: Finished difference Result 5882 states and 7591 transitions. [2021-11-07 08:32:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:32:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 08:32:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:23,856 INFO L225 Difference]: With dead ends: 5882 [2021-11-07 08:32:23,856 INFO L226 Difference]: Without dead ends: 3402 [2021-11-07 08:32:23,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:32:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2021-11-07 08:32:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3401. [2021-11-07 08:32:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 1.2844117647058824) internal successors, (4367), 3400 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 4367 transitions. [2021-11-07 08:32:24,423 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 4367 transitions. Word has length 64 [2021-11-07 08:32:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:24,424 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 4367 transitions. [2021-11-07 08:32:24,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 4367 transitions. [2021-11-07 08:32:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:32:24,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:24,426 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:24,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:32:24,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:24,652 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash 410842133, now seen corresponding path program 5 times [2021-11-07 08:32:24,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:24,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274175958] [2021-11-07 08:32:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:24,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:32:25,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:25,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274175958] [2021-11-07 08:32:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274175958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:25,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134558943] [2021-11-07 08:32:25,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:32:25,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:25,596 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:32:25,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:32:32,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 08:32:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:32:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-07 08:32:32,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:32:32,197 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 35 treesize of output 15 [2021-11-07 08:32:32,255 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 7 treesize of output 3 [2021-11-07 08:32:32,402 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 80 treesize of output 59 [2021-11-07 08:32:32,406 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 69 treesize of output 36 [2021-11-07 08:32:32,410 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 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 08:32:32,491 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 7 treesize of output 3 [2021-11-07 08:32:32,816 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 170 treesize of output 149 [2021-11-07 08:32:32,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 135 [2021-11-07 08:32:32,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:32:32,853 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:32:32,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 154 treesize of output 122 [2021-11-07 08:32:32,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 158 [2021-11-07 08:32:32,874 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-07 08:32:32,875 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 155 treesize of output 155 [2021-11-07 08:32:32,931 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:32:32,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 57 [2021-11-07 08:32:33,701 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:32:33,702 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 34 treesize of output 14 [2021-11-07 08:32:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:33,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:32:33,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 63 [2021-11-07 08:32:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:32:33,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:32:33,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 58 treesize of output 56 [2021-11-07 08:32:33,987 INFO L354 Elim1Store]: treesize reduction 156, result has 13.3 percent of original size [2021-11-07 08:32:33,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 98 [2021-11-07 08:32:34,003 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-07 08:32:34,004 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 98 treesize of output 78 [2021-11-07 08:32:34,019 INFO L354 Elim1Store]: treesize reduction 61, result has 15.3 percent of original size [2021-11-07 08:32:34,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 66 [2021-11-07 08:32:34,365 INFO L354 Elim1Store]: treesize reduction 220, result has 13.0 percent of original size [2021-11-07 08:32:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 212 treesize of output 114 [2021-11-07 08:32:34,399 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-07 08:32:34,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 169 [2021-11-07 08:32:34,416 INFO L354 Elim1Store]: treesize reduction 71, result has 13.4 percent of original size [2021-11-07 08:32:34,416 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 146 treesize of output 106 [2021-11-07 08:32:34,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:32:34,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 42 [2021-11-07 08:32:34,749 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 27 treesize of output 19 [2021-11-07 08:32:34,775 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 [2021-11-07 08:32:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 24 proven. 91 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:32:34,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134558943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:34,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:32:34,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2021-11-07 08:32:34,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944397547] [2021-11-07 08:32:34,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:32:34,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:32:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:32:34,784 INFO L87 Difference]: Start difference. First operand 3401 states and 4367 transitions. Second operand has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 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) [2021-11-07 08:32:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:38,537 INFO L93 Difference]: Finished difference Result 5441 states and 6999 transitions. [2021-11-07 08:32:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:32:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 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) Word has length 64 [2021-11-07 08:32:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:38,546 INFO L225 Difference]: With dead ends: 5441 [2021-11-07 08:32:38,546 INFO L226 Difference]: Without dead ends: 3779 [2021-11-07 08:32:38,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 08:32:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-11-07 08:32:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3609. [2021-11-07 08:32:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3608 states have (on average 1.2829822616407982) internal successors, (4629), 3608 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 4629 transitions. [2021-11-07 08:32:39,160 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 4629 transitions. Word has length 64 [2021-11-07 08:32:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:39,160 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 4629 transitions. [2021-11-07 08:32:39,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 27 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) [2021-11-07 08:32:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 4629 transitions. [2021-11-07 08:32:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:32:39,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:39,163 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:39,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 08:32:39,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:39,384 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash -912400336, now seen corresponding path program 7 times [2021-11-07 08:32:39,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:39,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535958000] [2021-11-07 08:32:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:39,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 44 proven. 103 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:32:40,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:40,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535958000] [2021-11-07 08:32:40,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535958000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:40,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519284146] [2021-11-07 08:32:40,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:32:40,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:40,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:40,790 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:32:40,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:32:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 163 conjunts are in the unsatisfiable core [2021-11-07 08:32:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:32:43,477 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:32:43,608 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 08:32:43,609 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 56 treesize of output 33 [2021-11-07 08:32:43,628 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-07 08:32:43,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-07 08:32:43,930 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 137 treesize of output 116 [2021-11-07 08:32:43,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:32:43,969 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:32:43,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 108 [2021-11-07 08:32:44,008 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-07 08:32:44,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 156 treesize of output 171 [2021-11-07 08:32:44,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:32:44,081 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:32:44,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 61 [2021-11-07 08:32:44,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:32:44,804 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-11-07 08:32:44,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 200 [2021-11-07 08:32:44,839 INFO L354 Elim1Store]: treesize reduction 101, result has 16.5 percent of original size [2021-11-07 08:32:44,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 338 treesize of output 326 [2021-11-07 08:32:44,866 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-07 08:32:44,866 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 314 treesize of output 290 [2021-11-07 08:32:44,875 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 287 treesize of output 263 [2021-11-07 08:32:44,885 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 260 treesize of output 223 [2021-11-07 08:32:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:44,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:32:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 56 [2021-11-07 08:32:46,423 INFO L354 Elim1Store]: treesize reduction 222, result has 10.1 percent of original size [2021-11-07 08:32:46,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 211 treesize of output 136 [2021-11-07 08:32:46,459 INFO L354 Elim1Store]: treesize reduction 106, result has 17.2 percent of original size [2021-11-07 08:32:46,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 131 [2021-11-07 08:32:46,477 INFO L354 Elim1Store]: treesize reduction 93, result has 17.0 percent of original size [2021-11-07 08:32:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 112 [2021-11-07 08:32:47,030 INFO L354 Elim1Store]: treesize reduction 216, result has 12.6 percent of original size [2021-11-07 08:32:47,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 158 [2021-11-07 08:32:47,069 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-07 08:32:47,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 199 [2021-11-07 08:32:47,086 INFO L354 Elim1Store]: treesize reduction 139, result has 2.1 percent of original size [2021-11-07 08:32:47,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 179 treesize of output 144 [2021-11-07 08:32:47,544 INFO L354 Elim1Store]: treesize reduction 304, result has 11.1 percent of original size [2021-11-07 08:32:47,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 503 treesize of output 175 [2021-11-07 08:32:47,582 INFO L354 Elim1Store]: treesize reduction 198, result has 13.2 percent of original size [2021-11-07 08:32:47,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 448 treesize of output 273 [2021-11-07 08:32:47,603 INFO L354 Elim1Store]: treesize reduction 267, result has 12.2 percent of original size [2021-11-07 08:32:47,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 252 [2021-11-07 08:32:48,269 INFO L354 Elim1Store]: treesize reduction 51, result has 13.6 percent of original size [2021-11-07 08:32:48,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 85 [2021-11-07 08:32:48,281 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-07 08:32:48,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 41 [2021-11-07 08:32:48,346 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 [2021-11-07 08:32:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:32:48,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519284146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:48,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:32:48,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2021-11-07 08:32:48,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007464299] [2021-11-07 08:32:48,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:32:48,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:32:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:32:48,400 INFO L87 Difference]: Start difference. First operand 3609 states and 4629 transitions. Second operand has 37 states, 37 states have (on average 3.3783783783783785) internal successors, (125), 37 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:25,463 INFO L93 Difference]: Finished difference Result 9113 states and 11737 transitions. [2021-11-07 08:33:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-07 08:33:25,464 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3783783783783785) internal successors, (125), 37 states have internal predecessors, (125), 0 states have call successors, (0), 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 66 [2021-11-07 08:33:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:25,485 INFO L225 Difference]: With dead ends: 9113 [2021-11-07 08:33:25,485 INFO L226 Difference]: Without dead ends: 5997 [2021-11-07 08:33:25,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8613 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=2878, Invalid=23528, Unknown=0, NotChecked=0, Total=26406 [2021-11-07 08:33:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5997 states. [2021-11-07 08:33:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5997 to 4967. [2021-11-07 08:33:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 1.2897704389850986) internal successors, (6405), 4966 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 6405 transitions. [2021-11-07 08:33:26,328 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 6405 transitions. Word has length 66 [2021-11-07 08:33:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:26,328 INFO L470 AbstractCegarLoop]: Abstraction has 4967 states and 6405 transitions. [2021-11-07 08:33:26,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.3783783783783785) internal successors, (125), 37 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 6405 transitions. [2021-11-07 08:33:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:33:26,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:26,329 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:26,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-07 08:33:26,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:26,530 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1254897744, now seen corresponding path program 6 times [2021-11-07 08:33:26,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:26,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347717733] [2021-11-07 08:33:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:26,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:33:27,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:27,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347717733] [2021-11-07 08:33:27,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347717733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:27,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50695925] [2021-11-07 08:33:27,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:33:27,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:27,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:27,834 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:27,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:33:31,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-07 08:33:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:31,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-07 08:33:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:31,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 114 [2021-11-07 08:33:31,477 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 102 treesize of output 81 [2021-11-07 08:33:31,491 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 95 treesize of output 62 [2021-11-07 08:33:31,495 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 0 case distinctions, treesize of input 51 treesize of output 50 [2021-11-07 08:33:31,498 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 50 treesize of output 38 [2021-11-07 08:33:31,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:31,978 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:33:31,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 246 treesize of output 218 [2021-11-07 08:33:32,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:32,049 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:33:32,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 244 treesize of output 208 [2021-11-07 08:33:32,083 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-07 08:33:32,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 300 [2021-11-07 08:33:32,098 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 273 treesize of output 261 [2021-11-07 08:33:32,119 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-07 08:33:32,119 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 258 treesize of output 258 [2021-11-07 08:33:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 37 [2021-11-07 08:33:32,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:32,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2021-11-07 08:33:33,029 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-11-07 08:33:33,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 145 treesize of output 138 [2021-11-07 08:33:33,052 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-07 08:33:33,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 82 [2021-11-07 08:33:33,073 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-07 08:33:33,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 64 [2021-11-07 08:33:33,379 INFO L354 Elim1Store]: treesize reduction 162, result has 10.0 percent of original size [2021-11-07 08:33:33,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 112 [2021-11-07 08:33:33,417 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-11-07 08:33:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 97 [2021-11-07 08:33:33,430 INFO L354 Elim1Store]: treesize reduction 37, result has 7.5 percent of original size [2021-11-07 08:33:33,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 72 [2021-11-07 08:33:33,788 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-11-07 08:33:33,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 104 [2021-11-07 08:33:33,822 INFO L354 Elim1Store]: treesize reduction 122, result has 14.7 percent of original size [2021-11-07 08:33:33,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 162 [2021-11-07 08:33:33,827 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 153 treesize of output 117 [2021-11-07 08:33:34,902 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-07 08:33:34,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 58 [2021-11-07 08:33:34,913 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-07 08:33:34,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 39 [2021-11-07 08:33:34,967 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 [2021-11-07 08:33:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 127 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:33:35,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50695925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:35,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:33:35,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-11-07 08:33:35,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064900272] [2021-11-07 08:33:35,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:33:35,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:33:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:33:35,013 INFO L87 Difference]: Start difference. First operand 4967 states and 6405 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 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) [2021-11-07 08:33:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:44,694 INFO L93 Difference]: Finished difference Result 5405 states and 6917 transitions. [2021-11-07 08:33:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 08:33:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 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) Word has length 67 [2021-11-07 08:33:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:44,706 INFO L225 Difference]: With dead ends: 5405 [2021-11-07 08:33:44,706 INFO L226 Difference]: Without dead ends: 5403 [2021-11-07 08:33:44,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=614, Invalid=4788, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 08:33:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5403 states. [2021-11-07 08:33:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5403 to 4980. [2021-11-07 08:33:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4979 states have (on average 1.289616388833099) internal successors, (6421), 4979 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 6421 transitions. [2021-11-07 08:33:45,426 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 6421 transitions. Word has length 67 [2021-11-07 08:33:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:45,426 INFO L470 AbstractCegarLoop]: Abstraction has 4980 states and 6421 transitions. [2021-11-07 08:33:45,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 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) [2021-11-07 08:33:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 6421 transitions. [2021-11-07 08:33:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:33:45,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:45,428 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:45,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 08:33:45,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 08:33:45,648 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1773815603, now seen corresponding path program 7 times [2021-11-07 08:33:45,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:45,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050514988] [2021-11-07 08:33:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:45,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:46,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:46,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050514988] [2021-11-07 08:33:46,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050514988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:46,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427680478] [2021-11-07 08:33:46,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:33:46,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:46,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:46,912 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:46,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:33:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:49,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 171 conjunts are in the unsatisfiable core [2021-11-07 08:33:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:49,881 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:33:49,969 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 87 treesize of output 66 [2021-11-07 08:33:49,973 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 76 treesize of output 43 [2021-11-07 08:33:49,989 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-07 08:33:49,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 36 [2021-11-07 08:33:50,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:50,352 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:33:50,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 205 treesize of output 173 [2021-11-07 08:33:50,412 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-07 08:33:50,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 261 treesize of output 276 [2021-11-07 08:33:50,437 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:33:50,437 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 1 case distinctions, treesize of input 243 treesize of output 227 [2021-11-07 08:33:50,444 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 213 treesize of output 176 [2021-11-07 08:33:50,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:33:50,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 68 [2021-11-07 08:33:51,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:51,952 INFO L354 Elim1Store]: treesize reduction 859, result has 5.9 percent of original size [2021-11-07 08:33:51,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 328 treesize of output 302 [2021-11-07 08:33:52,008 INFO L354 Elim1Store]: treesize reduction 178, result has 9.2 percent of original size [2021-11-07 08:33:52,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 369 treesize of output 281 [2021-11-07 08:33:52,032 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-11-07 08:33:52,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 336 treesize of output 263 [2021-11-07 08:33:52,068 INFO L354 Elim1Store]: treesize reduction 94, result has 13.8 percent of original size [2021-11-07 08:33:52,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 321 treesize of output 235 [2021-11-07 08:33:52,093 INFO L354 Elim1Store]: treesize reduction 101, result has 16.5 percent of original size [2021-11-07 08:33:52,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 414 treesize of output 402 [2021-11-07 08:33:52,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:52,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:52,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 115 [2021-11-07 08:33:53,655 INFO L354 Elim1Store]: treesize reduction 160, result has 15.3 percent of original size [2021-11-07 08:33:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 216 treesize of output 126 [2021-11-07 08:33:53,701 INFO L354 Elim1Store]: treesize reduction 236, result has 14.8 percent of original size [2021-11-07 08:33:53,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 137 [2021-11-07 08:33:54,134 INFO L354 Elim1Store]: treesize reduction 430, result has 13.0 percent of original size [2021-11-07 08:33:54,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 236 treesize of output 222 [2021-11-07 08:33:54,197 INFO L354 Elim1Store]: treesize reduction 290, result has 9.9 percent of original size [2021-11-07 08:33:54,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 207 treesize of output 110 [2021-11-07 08:33:54,843 INFO L354 Elim1Store]: treesize reduction 426, result has 8.8 percent of original size [2021-11-07 08:33:54,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 360 treesize of output 185 [2021-11-07 08:33:54,955 INFO L354 Elim1Store]: treesize reduction 620, result has 5.3 percent of original size [2021-11-07 08:33:54,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 237 treesize of output 172 [2021-11-07 08:33:55,125 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 08:33:55,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 92 [2021-11-07 08:33:55,133 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 08:33:55,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 50 [2021-11-07 08:33:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:33:55,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427680478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:55,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:33:55,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-11-07 08:33:55,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219985129] [2021-11-07 08:33:55,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:33:55,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:33:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:33:55,167 INFO L87 Difference]: Start difference. First operand 4980 states and 6421 transitions. Second operand has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:22,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:22,539 INFO L93 Difference]: Finished difference Result 21657 states and 27832 transitions. [2021-11-07 08:35:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-07 08:35:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 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 67 [2021-11-07 08:35:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:22,563 INFO L225 Difference]: With dead ends: 21657 [2021-11-07 08:35:22,564 INFO L226 Difference]: Without dead ends: 17156 [2021-11-07 08:35:22,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6081 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=2245, Invalid=16387, Unknown=0, NotChecked=0, Total=18632 [2021-11-07 08:35:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17156 states. [2021-11-07 08:35:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17156 to 10306. [2021-11-07 08:35:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10306 states, 10305 states have (on average 1.281513828238719) internal successors, (13206), 10305 states have internal predecessors, (13206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10306 states to 10306 states and 13206 transitions. [2021-11-07 08:35:24,123 INFO L78 Accepts]: Start accepts. Automaton has 10306 states and 13206 transitions. Word has length 67 [2021-11-07 08:35:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:24,123 INFO L470 AbstractCegarLoop]: Abstraction has 10306 states and 13206 transitions. [2021-11-07 08:35:24,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 10306 states and 13206 transitions. [2021-11-07 08:35:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:35:24,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:24,125 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:24,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:24,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:35:24,327 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:24,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1259435467, now seen corresponding path program 8 times [2021-11-07 08:35:24,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:24,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116724463] [2021-11-07 08:35:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:24,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 32 proven. 136 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:35:25,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:25,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116724463] [2021-11-07 08:35:25,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116724463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:25,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303058224] [2021-11-07 08:35:25,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:35:25,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:25,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:25,173 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:25,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:35:27,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:35:27,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 159 conjunts are in the unsatisfiable core [2021-11-07 08:35:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:28,051 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-07 08:35:28,051 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 46 treesize of output 33 [2021-11-07 08:35:28,054 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 0 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 08:35:28,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:35:28,238 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:35:28,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 127 [2021-11-07 08:35:28,244 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 183 treesize of output 150 [2021-11-07 08:35:28,267 INFO L354 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2021-11-07 08:35:28,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 151 [2021-11-07 08:35:28,325 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:35:28,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 57 [2021-11-07 08:35:28,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:35:28,829 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:35:28,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 226 treesize of output 198 [2021-11-07 08:35:28,853 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:35:28,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 181 treesize of output 159 [2021-11-07 08:35:28,869 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:35:28,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 124 [2021-11-07 08:35:28,903 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-07 08:35:28,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 192 treesize of output 182 [2021-11-07 08:35:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:35:28,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 29 [2021-11-07 08:35:29,721 INFO L354 Elim1Store]: treesize reduction 110, result has 16.7 percent of original size [2021-11-07 08:35:29,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 89 [2021-11-07 08:35:29,740 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-07 08:35:29,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 73 [2021-11-07 08:35:29,992 INFO L354 Elim1Store]: treesize reduction 212, result has 14.2 percent of original size [2021-11-07 08:35:29,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 157 treesize of output 108 [2021-11-07 08:35:30,024 INFO L354 Elim1Store]: treesize reduction 158, result has 12.2 percent of original size [2021-11-07 08:35:30,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 115 [2021-11-07 08:35:30,470 INFO L354 Elim1Store]: treesize reduction 342, result has 9.0 percent of original size [2021-11-07 08:35:30,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 244 treesize of output 129 [2021-11-07 08:35:30,520 INFO L354 Elim1Store]: treesize reduction 272, result has 10.2 percent of original size [2021-11-07 08:35:30,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 143 [2021-11-07 08:35:32,913 INFO L354 Elim1Store]: treesize reduction 170, result has 1.7 percent of original size [2021-11-07 08:35:32,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 249 treesize of output 151 [2021-11-07 08:35:32,933 INFO L354 Elim1Store]: treesize reduction 37, result has 27.5 percent of original size [2021-11-07 08:35:32,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 55 [2021-11-07 08:35:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 32 proven. 125 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:35:32,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303058224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:32,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:32,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-11-07 08:35:32,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18348522] [2021-11-07 08:35:32,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:35:32,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:35:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:35:32,949 INFO L87 Difference]: Start difference. First operand 10306 states and 13206 transitions. Second operand has 31 states, 31 states have (on average 4.0) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:30,288 INFO L93 Difference]: Finished difference Result 27312 states and 34886 transitions. [2021-11-07 08:37:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-07 08:37:30,288 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.0) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 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 70 [2021-11-07 08:37:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:30,306 INFO L225 Difference]: With dead ends: 27312 [2021-11-07 08:37:30,307 INFO L226 Difference]: Without dead ends: 18108 [2021-11-07 08:37:30,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=2310, Invalid=13188, Unknown=2, NotChecked=0, Total=15500 [2021-11-07 08:37:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18108 states. [2021-11-07 08:37:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18108 to 15469. [2021-11-07 08:37:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15469 states, 15468 states have (on average 1.2796095164209982) internal successors, (19793), 15468 states have internal predecessors, (19793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15469 states to 15469 states and 19793 transitions. [2021-11-07 08:37:32,148 INFO L78 Accepts]: Start accepts. Automaton has 15469 states and 19793 transitions. Word has length 70 [2021-11-07 08:37:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:32,149 INFO L470 AbstractCegarLoop]: Abstraction has 15469 states and 19793 transitions. [2021-11-07 08:37:32,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.0) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15469 states and 19793 transitions. [2021-11-07 08:37:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 08:37:32,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:32,151 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:32,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:37:32,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:37:32,360 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:37:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1156818416, now seen corresponding path program 4 times [2021-11-07 08:37:32,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:32,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420061838] [2021-11-07 08:37:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:32,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:37:33,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:33,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420061838] [2021-11-07 08:37:33,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420061838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:33,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887650037] [2021-11-07 08:37:33,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:37:33,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:33,064 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:33,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:37:35,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:37:35,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:37:35,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 08:37:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:36,206 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 116 treesize of output 95 [2021-11-07 08:37:36,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 106 [2021-11-07 08:37:36,212 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 95 treesize of output 62 [2021-11-07 08:37:36,215 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 0 case distinctions, treesize of input 51 treesize of output 50 [2021-11-07 08:37:36,218 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 50 treesize of output 38 [2021-11-07 08:37:36,787 INFO L354 Elim1Store]: treesize reduction 233, result has 15.3 percent of original size [2021-11-07 08:37:36,788 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 3 case distinctions, treesize of input 237 treesize of output 241 [2021-11-07 08:37:37,215 INFO L354 Elim1Store]: treesize reduction 501, result has 16.6 percent of original size [2021-11-07 08:37:37,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 695 treesize of output 435 [2021-11-07 08:37:37,283 INFO L354 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-11-07 08:37:37,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 635 treesize of output 629 [2021-11-07 08:37:37,314 INFO L354 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2021-11-07 08:37:37,314 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 620 treesize of output 620 [2021-11-07 08:37:37,342 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-07 08:37:37,342 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 614 treesize of output 590 [2021-11-07 08:37:37,413 INFO L354 Elim1Store]: treesize reduction 246, result has 19.3 percent of original size [2021-11-07 08:37:37,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 653 treesize of output 605 [2021-11-07 08:37:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:37,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:37:37,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:37,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 38 [2021-11-07 08:37:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:37,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:37,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:37,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:37:37,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 68 [2021-11-07 08:37:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:37,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 37 [2021-11-07 08:37:38,262 INFO L354 Elim1Store]: treesize reduction 71, result has 16.5 percent of original size [2021-11-07 08:37:38,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 353 treesize of output 234 [2021-11-07 08:37:38,374 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 91 treesize of output 71 [2021-11-07 08:37:39,010 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-07 08:37:39,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 162 treesize of output 108 [2021-11-07 08:37:39,035 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-07 08:37:39,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 117 [2021-11-07 08:37:39,051 INFO L354 Elim1Store]: treesize reduction 101, result has 17.2 percent of original size [2021-11-07 08:37:39,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 117 [2021-11-07 08:37:39,095 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-07 08:37:39,095 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 54 [2021-11-07 08:37:39,100 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:37:39,100 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2021-11-07 08:37:39,142 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 [2021-11-07 08:37:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 41 proven. 95 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:37:39,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887650037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:39,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:37:39,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-11-07 08:37:39,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824256493] [2021-11-07 08:37:39,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:37:39,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:37:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:37:39,201 INFO L87 Difference]: Start difference. First operand 15469 states and 19793 transitions. Second operand has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:42,210 INFO L93 Difference]: Finished difference Result 26019 states and 33338 transitions. [2021-11-07 08:37:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:37:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 08:37:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:42,228 INFO L225 Difference]: With dead ends: 26019 [2021-11-07 08:37:42,228 INFO L226 Difference]: Without dead ends: 15474 [2021-11-07 08:37:42,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:37:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15474 states. [2021-11-07 08:37:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15474 to 15472. [2021-11-07 08:37:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15472 states, 15471 states have (on average 1.279555297007304) internal successors, (19796), 15471 states have internal predecessors, (19796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15472 states to 15472 states and 19796 transitions. [2021-11-07 08:37:44,161 INFO L78 Accepts]: Start accepts. Automaton has 15472 states and 19796 transitions. Word has length 73 [2021-11-07 08:37:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:44,161 INFO L470 AbstractCegarLoop]: Abstraction has 15472 states and 19796 transitions. [2021-11-07 08:37:44,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:37:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 15472 states and 19796 transitions. [2021-11-07 08:37:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:37:44,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:44,164 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:44,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:37:44,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:37:44,376 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:37:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash 387336140, now seen corresponding path program 9 times [2021-11-07 08:37:44,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:44,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777722924] [2021-11-07 08:37:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:44,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:37:45,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:45,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777722924] [2021-11-07 08:37:45,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777722924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:45,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095331854] [2021-11-07 08:37:45,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:37:45,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:45,544 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:45,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:37:49,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:37:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:37:49,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 146 conjunts are in the unsatisfiable core [2021-11-07 08:37:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:49,387 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 80 treesize of output 59 [2021-11-07 08:37:49,391 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 52 treesize of output 31 [2021-11-07 08:37:49,394 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 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 08:37:49,848 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-07 08:37:49,849 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 71 [2021-11-07 08:37:49,863 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-07 08:37:49,863 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 58 treesize of output 26 [2021-11-07 08:37:50,105 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-07 08:37:50,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 63 [2021-11-07 08:37:50,138 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-11-07 08:37:50,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 68 [2021-11-07 08:37:50,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:37:50,627 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:37:50,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 166 [2021-11-07 08:37:50,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:37:50,669 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:37:50,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 160 [2021-11-07 08:37:50,695 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-07 08:37:50,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 240 treesize of output 242 [2021-11-07 08:37:50,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:50,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 29 [2021-11-07 08:37:50,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:37:50,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 63 [2021-11-07 08:37:52,159 INFO L354 Elim1Store]: treesize reduction 98, result has 17.6 percent of original size [2021-11-07 08:37:52,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 278 treesize of output 247 [2021-11-07 08:37:52,266 INFO L354 Elim1Store]: treesize reduction 458, result has 7.5 percent of original size [2021-11-07 08:37:52,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 259 [2021-11-07 08:37:52,314 INFO L354 Elim1Store]: treesize reduction 89, result has 3.3 percent of original size [2021-11-07 08:37:52,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 199 [2021-11-07 08:37:52,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:37:52,442 INFO L354 Elim1Store]: treesize reduction 537, result has 8.2 percent of original size [2021-11-07 08:37:52,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 250 treesize of output 238 [2021-11-07 08:37:52,461 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:37:52,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 189 [2021-11-07 08:37:52,480 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-07 08:37:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 305 treesize of output 295 [2021-11-07 08:37:52,500 INFO L354 Elim1Store]: treesize reduction 137, result has 23.9 percent of original size [2021-11-07 08:37:52,501 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 286 treesize of output 274 [2021-11-07 08:37:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:52,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:37:52,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:37:52,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 78 [2021-11-07 08:37:53,210 INFO L354 Elim1Store]: treesize reduction 102, result has 9.7 percent of original size [2021-11-07 08:37:53,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 122 [2021-11-07 08:37:53,310 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-07 08:37:53,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 66 [2021-11-07 08:37:53,366 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 [2021-11-07 08:37:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 95 proven. 81 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:37:53,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095331854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:53,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:37:53,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-11-07 08:37:53,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141443318] [2021-11-07 08:37:53,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:37:53,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:53,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:37:53,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:37:53,414 INFO L87 Difference]: Start difference. First operand 15472 states and 19796 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 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) [2021-11-07 08:38:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:22,842 INFO L93 Difference]: Finished difference Result 19517 states and 24656 transitions. [2021-11-07 08:38:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 08:38:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 08:38:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:22,864 INFO L225 Difference]: With dead ends: 19517 [2021-11-07 08:38:22,864 INFO L226 Difference]: Without dead ends: 19515 [2021-11-07 08:38:22,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=839, Invalid=7717, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 08:38:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19515 states. [2021-11-07 08:38:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19515 to 15948. [2021-11-07 08:38:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15948 states, 15947 states have (on average 1.2766037499216154) internal successors, (20358), 15947 states have internal predecessors, (20358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15948 states to 15948 states and 20358 transitions. [2021-11-07 08:38:24,941 INFO L78 Accepts]: Start accepts. Automaton has 15948 states and 20358 transitions. Word has length 74 [2021-11-07 08:38:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:24,942 INFO L470 AbstractCegarLoop]: Abstraction has 15948 states and 20358 transitions. [2021-11-07 08:38:24,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 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) [2021-11-07 08:38:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 15948 states and 20358 transitions. [2021-11-07 08:38:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:38:24,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:24,944 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2021-11-07 08:38:24,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:25,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-07 08:38:25,160 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:25,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:25,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1147105258, now seen corresponding path program 9 times [2021-11-07 08:38:25,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:25,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425945023] [2021-11-07 08:38:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:25,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 198 proven. 152 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:38:26,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:26,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425945023] [2021-11-07 08:38:26,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425945023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:26,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273195121] [2021-11-07 08:38:26,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:38:26,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:26,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:26,216 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:26,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d4e9e45-4104-4d2d-ac18-cc7fbeee60d7/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:38:30,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:38:30,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:38:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 182 conjunts are in the unsatisfiable core [2021-11-07 08:38:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:30,216 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-07 08:38:30,216 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 44 treesize of output 31 [2021-11-07 08:38:30,470 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 118 treesize of output 97 [2021-11-07 08:38:30,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:38:30,497 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:38:30,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 93 [2021-11-07 08:38:30,504 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 0 case distinctions, treesize of input 129 treesize of output 128 [2021-11-07 08:38:30,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:38:30,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2021-11-07 08:38:30,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:38:30,985 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 08:38:30,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 211 treesize of output 183 [2021-11-07 08:38:31,027 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-07 08:38:31,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 186 [2021-11-07 08:38:31,052 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 08:38:31,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 162 [2021-11-07 08:38:31,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:38:31,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 147 [2021-11-07 08:38:31,086 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-07 08:38:31,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 119 [2021-11-07 08:38:31,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:38:31,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:38:31,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 29 [2021-11-07 08:38:32,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:38:32,212 INFO L354 Elim1Store]: treesize reduction 104, result has 29.3 percent of original size [2021-11-07 08:38:32,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 224 [2021-11-07 08:38:32,247 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 08:38:32,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 384 treesize of output 371 [2021-11-07 08:38:32,267 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-11-07 08:38:32,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 354 treesize of output 320 [2021-11-07 08:38:32,307 INFO L354 Elim1Store]: treesize reduction 156, result has 24.6 percent of original size [2021-11-07 08:38:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 314 treesize of output 333 [2021-11-07 08:38:32,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:38:32,466 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-07 08:38:32,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 293 treesize of output 122 [2021-11-07 08:38:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 181 proven. 153 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-07 08:38:34,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273195121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:34,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:34,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2021-11-07 08:38:34,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775584192] [2021-11-07 08:38:34,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:38:34,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:38:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:38:34,089 INFO L87 Difference]: Start difference. First operand 15948 states and 20358 transitions. Second operand has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 27 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)