./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/mcmillan2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/mcmillan2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX --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 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:40:14,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:40:14,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:40:14,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:40:14,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:40:14,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:40:14,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:40:14,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:40:14,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:40:14,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:40:14,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:40:14,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:40:14,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:40:14,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:40:14,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:40:14,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:40:14,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:40:14,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:40:14,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:40:14,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:40:14,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:40:14,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:40:14,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:40:14,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:40:14,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:40:14,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:40:14,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:40:14,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:40:14,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:40:14,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:40:14,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:40:14,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:40:14,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:40:14,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:40:14,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:40:14,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:40:14,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:40:14,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:40:14,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:40:14,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:40:14,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:40:14,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:40:14,394 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:40:14,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:40:14,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:40:14,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:40:14,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:40:14,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:40:14,403 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:40:14,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:40:14,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:40:14,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:40:14,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:40:14,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:40:14,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:40:14,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:40:14,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:40:14,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:40:14,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:40:14,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:40:14,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:40:14,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:40:14,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:40:14,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:40:14,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:40:14,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:40:14,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:40:14,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:40:14,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:40:14,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:40:14,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:40:14,412 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:40:14,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:40:14,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:40:14,413 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_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be [2021-11-09 10:40:14,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:40:14,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:40:14,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:40:14,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:40:14,753 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:40:14,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loop-lit/mcmillan2006.i [2021-11-09 10:40:14,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/data/6e848bf6a/a99d1b50b24f432a88c144b4fab1693c/FLAG27c85cb08 [2021-11-09 10:40:15,252 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:40:15,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/sv-benchmarks/c/loop-lit/mcmillan2006.i [2021-11-09 10:40:15,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/data/6e848bf6a/a99d1b50b24f432a88c144b4fab1693c/FLAG27c85cb08 [2021-11-09 10:40:15,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/data/6e848bf6a/a99d1b50b24f432a88c144b4fab1693c [2021-11-09 10:40:15,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:40:15,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:40:15,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:40:15,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:40:15,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:40:15,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:15,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@346f2eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15, skipping insertion in model container [2021-11-09 10:40:15,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:15,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:40:15,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:40:15,872 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_1a5d5471-03f4-469e-8005-a598e60e34b7/sv-benchmarks/c/loop-lit/mcmillan2006.i[1009,1022] [2021-11-09 10:40:15,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:40:15,893 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:40:15,911 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_1a5d5471-03f4-469e-8005-a598e60e34b7/sv-benchmarks/c/loop-lit/mcmillan2006.i[1009,1022] [2021-11-09 10:40:15,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:40:15,946 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:40:15,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15 WrapperNode [2021-11-09 10:40:15,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:40:15,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:40:15,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:40:15,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:40:15,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:15,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:15,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:40:15,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:40:15,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:40:15,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:40:15,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:15,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:16,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:16,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:16,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:16,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:16,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:16,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:40:16,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:40:16,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:40:16,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:40:16,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (1/1) ... [2021-11-09 10:40:16,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:40:16,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:16,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:40:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:40:16,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:40:16,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:40:16,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:40:16,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:40:16,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:40:16,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:40:16,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:40:16,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:40:16,323 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-09 10:40:16,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:40:16 BoogieIcfgContainer [2021-11-09 10:40:16,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:40:16,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:40:16,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:40:16,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:40:16,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:40:15" (1/3) ... [2021-11-09 10:40:16,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b44bdf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:40:16, skipping insertion in model container [2021-11-09 10:40:16,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:40:15" (2/3) ... [2021-11-09 10:40:16,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b44bdf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:40:16, skipping insertion in model container [2021-11-09 10:40:16,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:40:16" (3/3) ... [2021-11-09 10:40:16,352 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2021-11-09 10:40:16,357 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:40:16,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:40:16,456 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:40:16,463 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 [2021-11-09 10:40:16,464 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:40:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 10:40:16,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:16,484 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:16,485 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:16,503 INFO L85 PathProgramCache]: Analyzing trace with hash 186158361, now seen corresponding path program 1 times [2021-11-09 10:40:16,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:16,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740945841] [2021-11-09 10:40:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:16,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:16,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:16,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740945841] [2021-11-09 10:40:16,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740945841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:16,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:16,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:40:16,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417344746] [2021-11-09 10:40:16,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:40:16,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:40:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:40:16,765 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:16,786 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-11-09 10:40:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:40:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-09 10:40:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:16,796 INFO L225 Difference]: With dead ends: 27 [2021-11-09 10:40:16,796 INFO L226 Difference]: Without dead ends: 12 [2021-11-09 10:40:16,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:40:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-09 10:40:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-09 10:40:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-09 10:40:16,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-09 10:40:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:16,841 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-09 10:40:16,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-09 10:40:16,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 10:40:16,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:16,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:16,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:40:16,845 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash 180617235, now seen corresponding path program 1 times [2021-11-09 10:40:16,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:16,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180841548] [2021-11-09 10:40:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:16,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:17,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:17,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180841548] [2021-11-09 10:40:17,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180841548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:17,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:17,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:40:17,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113229981] [2021-11-09 10:40:17,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:40:17,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:40:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:40:17,018 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:17,080 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-09 10:40:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:40:17,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-09 10:40:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:17,083 INFO L225 Difference]: With dead ends: 22 [2021-11-09 10:40:17,083 INFO L226 Difference]: Without dead ends: 14 [2021-11-09 10:40:17,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:40:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-09 10:40:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-09 10:40:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-09 10:40:17,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-11-09 10:40:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:17,091 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-09 10:40:17,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-09 10:40:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:40:17,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:17,094 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:17,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:40:17,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -875113359, now seen corresponding path program 1 times [2021-11-09 10:40:17,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:17,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560289804] [2021-11-09 10:40:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:17,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:17,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:17,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560289804] [2021-11-09 10:40:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560289804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:17,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985013973] [2021-11-09 10:40:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:17,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:17,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:17,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:17,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:40:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:40:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:17,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-09 10:40:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:17,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985013973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:17,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:17,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-11-09 10:40:17,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772461685] [2021-11-09 10:40:17,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:40:17,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:40:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:40:17,650 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:17,763 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-11-09 10:40:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:40:17,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 10:40:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:17,765 INFO L225 Difference]: With dead ends: 21 [2021-11-09 10:40:17,765 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 10:40:17,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:40:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 10:40:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-11-09 10:40:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-09 10:40:17,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-09 10:40:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:17,770 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-09 10:40:17,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-09 10:40:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 10:40:17,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:17,771 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:17,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:17,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:17,990 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1418361721, now seen corresponding path program 1 times [2021-11-09 10:40:17,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:17,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856198824] [2021-11-09 10:40:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:17,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:18,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:18,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856198824] [2021-11-09 10:40:18,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856198824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:18,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209601881] [2021-11-09 10:40:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:18,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:18,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:18,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:18,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:40:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:18,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:40:18,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209601881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:18,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:18,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 10:40:18,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635070935] [2021-11-09 10:40:18,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:40:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:40:18,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:40:18,260 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:18,325 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-09 10:40:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:40:18,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 10:40:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:18,327 INFO L225 Difference]: With dead ends: 30 [2021-11-09 10:40:18,327 INFO L226 Difference]: Without dead ends: 18 [2021-11-09 10:40:18,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-09 10:40:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-09 10:40:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-09 10:40:18,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-11-09 10:40:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:18,333 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-09 10:40:18,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-09 10:40:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:40:18,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:18,336 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:18,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:18,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:18,550 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:18,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:18,551 INFO L85 PathProgramCache]: Analyzing trace with hash -324855195, now seen corresponding path program 2 times [2021-11-09 10:40:18,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:18,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067188582] [2021-11-09 10:40:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:18,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:18,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:18,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067188582] [2021-11-09 10:40:18,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067188582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:18,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812694287] [2021-11-09 10:40:18,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:40:18,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:18,728 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:18,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:40:18,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:40:18,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:18,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:40:18,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:18,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:40:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:19,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812694287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:19,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:19,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-11-09 10:40:19,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334420633] [2021-11-09 10:40:19,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:40:19,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:19,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:40:19,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:40:19,016 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:19,170 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-11-09 10:40:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:40:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 10:40:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:19,174 INFO L225 Difference]: With dead ends: 27 [2021-11-09 10:40:19,174 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 10:40:19,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:40:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 10:40:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-09 10:40:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2021-11-09 10:40:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-09 10:40:19,179 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-11-09 10:40:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-09 10:40:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-09 10:40:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:40:19,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:19,181 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:19,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:19,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:19,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1610985595, now seen corresponding path program 3 times [2021-11-09 10:40:19,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:19,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918480715] [2021-11-09 10:40:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:19,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:19,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:19,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918480715] [2021-11-09 10:40:19,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918480715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:19,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994887226] [2021-11-09 10:40:19,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:40:19,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:19,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:19,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:19,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:40:19,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:40:19,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:40:19,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994887226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:19,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:19,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 10:40:19,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472238651] [2021-11-09 10:40:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:40:19,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:19,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:40:19,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:40:19,793 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-11-09 10:40:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:19,917 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-11-09 10:40:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:40:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-11-09 10:40:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:19,918 INFO L225 Difference]: With dead ends: 40 [2021-11-09 10:40:19,918 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 10:40:19,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:40:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 10:40:19,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-09 10:40:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-09 10:40:19,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2021-11-09 10:40:19,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:19,923 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-09 10:40:19,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-11-09 10:40:19,923 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-09 10:40:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:40:19,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:19,924 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:19,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:20,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:20,151 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 731310041, now seen corresponding path program 4 times [2021-11-09 10:40:20,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:20,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667116470] [2021-11-09 10:40:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:20,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:20,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:20,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667116470] [2021-11-09 10:40:20,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667116470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:20,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138716968] [2021-11-09 10:40:20,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:40:20,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:20,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:20,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:20,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:40:20,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:40:20,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:20,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 10:40:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:20,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:40:20,977 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:40:20,978 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 58 treesize of output 37 [2021-11-09 10:40:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:21,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138716968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:21,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:21,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-11-09 10:40:21,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839643837] [2021-11-09 10:40:21,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:40:21,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:21,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:40:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:40:21,003 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:21,673 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-11-09 10:40:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 10:40:21,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 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 22 [2021-11-09 10:40:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:21,675 INFO L225 Difference]: With dead ends: 49 [2021-11-09 10:40:21,675 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 10:40:21,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:40:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 10:40:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-11-09 10:40:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-09 10:40:21,681 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 22 [2021-11-09 10:40:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:21,681 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-09 10:40:21,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-09 10:40:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:40:21,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:21,683 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:21,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:21,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 10:40:21,883 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash 985881805, now seen corresponding path program 5 times [2021-11-09 10:40:21,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:21,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800461122] [2021-11-09 10:40:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:21,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:22,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:22,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800461122] [2021-11-09 10:40:22,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800461122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:22,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312903447] [2021-11-09 10:40:22,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:40:22,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:22,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:22,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:22,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:40:22,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 10:40:22,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:40:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:22,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:40:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:22,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312903447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:22,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:22,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-11-09 10:40:22,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182495729] [2021-11-09 10:40:22,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:40:22,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:40:22,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:40:22,476 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:22,744 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-11-09 10:40:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:40:22,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-11-09 10:40:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:22,746 INFO L225 Difference]: With dead ends: 39 [2021-11-09 10:40:22,746 INFO L226 Difference]: Without dead ends: 37 [2021-11-09 10:40:22,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:40:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-09 10:40:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-11-09 10:40:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-09 10:40:22,753 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-11-09 10:40:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:22,753 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-09 10:40:22,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-09 10:40:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:40:22,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:22,755 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:22,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:22,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:22,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1173257955, now seen corresponding path program 6 times [2021-11-09 10:40:22,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:22,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520511746] [2021-11-09 10:40:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:22,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:23,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:23,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520511746] [2021-11-09 10:40:23,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520511746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:23,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418808879] [2021-11-09 10:40:23,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:40:23,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:23,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:23,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:23,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:40:23,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:40:23,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:23,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:40:23,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:23,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418808879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:23,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:23,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 10:40:23,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526783812] [2021-11-09 10:40:23,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:40:23,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:40:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:40:23,492 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:23,629 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-09 10:40:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:40:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:40:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:23,634 INFO L225 Difference]: With dead ends: 60 [2021-11-09 10:40:23,635 INFO L226 Difference]: Without dead ends: 36 [2021-11-09 10:40:23,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:40:23,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-09 10:40:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-09 10:40:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2021-11-09 10:40:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-09 10:40:23,649 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-11-09 10:40:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:23,649 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-09 10:40:23,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-09 10:40:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 10:40:23,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:23,653 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:23,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:23,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:23,867 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:23,868 INFO L85 PathProgramCache]: Analyzing trace with hash -92169919, now seen corresponding path program 7 times [2021-11-09 10:40:23,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:23,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073481540] [2021-11-09 10:40:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:23,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:24,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:24,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073481540] [2021-11-09 10:40:24,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073481540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:24,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689114000] [2021-11-09 10:40:24,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:40:24,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:24,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:24,065 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:24,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:40:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:24,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:40:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:24,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:40:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:24,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689114000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:24,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:24,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 20 [2021-11-09 10:40:24,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021048902] [2021-11-09 10:40:24,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:40:24,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:40:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:40:24,562 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-11-09 10:40:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:24,902 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-11-09 10:40:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:40:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 34 [2021-11-09 10:40:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:24,903 INFO L225 Difference]: With dead ends: 45 [2021-11-09 10:40:24,904 INFO L226 Difference]: Without dead ends: 43 [2021-11-09 10:40:24,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:40:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-09 10:40:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-11-09 10:40:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-09 10:40:24,912 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-11-09 10:40:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:24,913 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-09 10:40:24,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-11-09 10:40:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-09 10:40:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:40:24,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:24,914 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:24,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:25,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:40:25,130 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1251041623, now seen corresponding path program 8 times [2021-11-09 10:40:25,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:25,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518196201] [2021-11-09 10:40:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:25,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:25,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:25,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518196201] [2021-11-09 10:40:25,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518196201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:25,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936705933] [2021-11-09 10:40:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:40:25,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:25,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:25,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:40:25,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:40:25,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:25,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:40:25,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:25,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936705933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:25,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:25,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 10:40:25,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47888178] [2021-11-09 10:40:25,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:40:25,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:40:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:40:25,701 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:25,838 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-11-09 10:40:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:40:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 10:40:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:25,840 INFO L225 Difference]: With dead ends: 70 [2021-11-09 10:40:25,840 INFO L226 Difference]: Without dead ends: 42 [2021-11-09 10:40:25,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:40:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-09 10:40:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-09 10:40:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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) [2021-11-09 10:40:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-09 10:40:25,847 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-11-09 10:40:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:25,848 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-09 10:40:25,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-09 10:40:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:40:25,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:25,849 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:25,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:26,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:26,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:26,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash -747455179, now seen corresponding path program 9 times [2021-11-09 10:40:26,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:26,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842062831] [2021-11-09 10:40:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:26,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:26,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:26,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842062831] [2021-11-09 10:40:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842062831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:26,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143683902] [2021-11-09 10:40:26,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:40:26,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:26,363 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:26,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:40:26,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 10:40:26,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:26,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 10:40:26,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:26,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:40:27,527 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:40:27,527 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 58 treesize of output 37 [2021-11-09 10:40:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143683902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:27,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:27,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-11-09 10:40:27,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492746714] [2021-11-09 10:40:27,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:40:27,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:40:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:40:27,557 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:29,002 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-11-09 10:40:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 10:40:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:40:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:29,004 INFO L225 Difference]: With dead ends: 79 [2021-11-09 10:40:29,004 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 10:40:29,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=494, Invalid=4476, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 10:40:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 10:40:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-11-09 10:40:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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) [2021-11-09 10:40:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-11-09 10:40:29,013 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 40 [2021-11-09 10:40:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:29,013 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-11-09 10:40:29,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-11-09 10:40:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:40:29,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:29,015 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:29,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:29,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:40:29,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1870665559, now seen corresponding path program 10 times [2021-11-09 10:40:29,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:29,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819966175] [2021-11-09 10:40:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:29,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:29,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:29,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819966175] [2021-11-09 10:40:29,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819966175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:29,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576050382] [2021-11-09 10:40:29,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:40:29,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:29,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:29,507 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:29,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:40:29,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:40:29,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:40:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:29,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:40:30,820 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:40:30,821 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 58 treesize of output 37 [2021-11-09 10:40:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:30,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576050382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:30,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:30,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-11-09 10:40:30,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3283210] [2021-11-09 10:40:30,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:40:30,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:40:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:40:30,855 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:32,519 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-11-09 10:40:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:40:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 10:40:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:32,520 INFO L225 Difference]: With dead ends: 89 [2021-11-09 10:40:32,521 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 10:40:32,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=593, Invalid=5887, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 10:40:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 10:40:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-11-09 10:40:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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) [2021-11-09 10:40:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-09 10:40:32,531 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 46 [2021-11-09 10:40:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:32,532 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-09 10:40:32,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-09 10:40:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:40:32,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:32,533 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:32,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:32,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:40:32,747 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1193657443, now seen corresponding path program 11 times [2021-11-09 10:40:32,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:32,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867215294] [2021-11-09 10:40:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:32,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:33,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:33,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867215294] [2021-11-09 10:40:33,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867215294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:33,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172256479] [2021-11-09 10:40:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:40:33,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:33,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:33,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:40:33,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-09 10:40:33,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:33,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:40:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:33,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:40:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:33,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172256479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:33,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:33,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 29 [2021-11-09 10:40:33,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478392976] [2021-11-09 10:40:33,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 10:40:33,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:33,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 10:40:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:40:33,948 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:34,519 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-11-09 10:40:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:40:34,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:40:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:34,520 INFO L225 Difference]: With dead ends: 63 [2021-11-09 10:40:34,520 INFO L226 Difference]: Without dead ends: 61 [2021-11-09 10:40:34,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:40:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-09 10:40:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2021-11-09 10:40:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-09 10:40:34,529 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2021-11-09 10:40:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:34,529 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-09 10:40:34,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-09 10:40:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 10:40:34,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:34,531 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:34,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:34,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 10:40:34,731 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:34,732 INFO L85 PathProgramCache]: Analyzing trace with hash 215578035, now seen corresponding path program 12 times [2021-11-09 10:40:34,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:34,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819382975] [2021-11-09 10:40:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:34,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:34,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:34,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819382975] [2021-11-09 10:40:34,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819382975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:34,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708352338] [2021-11-09 10:40:34,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:40:34,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:34,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:34,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:34,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:40:35,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 10:40:35,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:35,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:40:35,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:35,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708352338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:35,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:35,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-11-09 10:40:35,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094438419] [2021-11-09 10:40:35,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:40:35,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:40:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:40:35,713 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:35,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:35,946 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-11-09 10:40:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:40:35,947 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-09 10:40:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:35,947 INFO L225 Difference]: With dead ends: 100 [2021-11-09 10:40:35,947 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 10:40:35,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1266, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:40:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 10:40:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-09 10:40:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-11-09 10:40:35,957 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2021-11-09 10:40:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:35,958 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-11-09 10:40:35,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-11-09 10:40:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 10:40:35,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:35,959 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:35,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:36,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:36,171 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1778046481, now seen corresponding path program 13 times [2021-11-09 10:40:36,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:36,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006293248] [2021-11-09 10:40:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:36,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:36,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006293248] [2021-11-09 10:40:36,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006293248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271266652] [2021-11-09 10:40:36,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:40:36,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:36,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:36,554 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:36,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:40:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 10:40:36,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:36,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:40:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:37,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271266652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:37,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:37,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 32 [2021-11-09 10:40:37,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616258137] [2021-11-09 10:40:37,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 10:40:37,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 10:40:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:40:37,410 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:37,985 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-11-09 10:40:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:40:37,986 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 10:40:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:37,986 INFO L225 Difference]: With dead ends: 69 [2021-11-09 10:40:37,986 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 10:40:37,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:40:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 10:40:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-11-09 10:40:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-11-09 10:40:37,997 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2021-11-09 10:40:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:37,997 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-11-09 10:40:37,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-11-09 10:40:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:40:37,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:37,999 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:38,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:38,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 10:40:38,211 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:38,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1367362009, now seen corresponding path program 14 times [2021-11-09 10:40:38,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:38,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694093622] [2021-11-09 10:40:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:38,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 129 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:38,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:38,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694093622] [2021-11-09 10:40:38,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694093622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:38,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045250355] [2021-11-09 10:40:38,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:40:38,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:38,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:38,455 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:38,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:40:38,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:40:38,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:38,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:40:38,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:39,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045250355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:39,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:39,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-11-09 10:40:39,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473637882] [2021-11-09 10:40:39,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:40:39,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:39,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:40:39,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:40:39,317 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:39,548 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-11-09 10:40:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:40:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-09 10:40:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:39,549 INFO L225 Difference]: With dead ends: 110 [2021-11-09 10:40:39,549 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 10:40:39,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:40:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 10:40:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-09 10:40:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 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) [2021-11-09 10:40:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-09 10:40:39,559 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-11-09 10:40:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:39,559 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-09 10:40:39,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-09 10:40:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:40:39,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:39,561 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:39,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:39,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:40:39,775 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1314727931, now seen corresponding path program 15 times [2021-11-09 10:40:39,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:39,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375635803] [2021-11-09 10:40:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:39,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:40,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:40,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375635803] [2021-11-09 10:40:40,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375635803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:40,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402503135] [2021-11-09 10:40:40,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:40:40,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:40,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:40,158 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:40,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:40:40,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 10:40:40,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:40:40,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:40:42,259 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:40:42,260 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 58 treesize of output 37 [2021-11-09 10:40:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 153 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:42,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402503135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:42,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:42,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-11-09 10:40:42,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811952378] [2021-11-09 10:40:42,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 10:40:42,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:42,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 10:40:42,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2093, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:40:42,300 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 49 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) [2021-11-09 10:40:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:45,128 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-11-09 10:40:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-09 10:40:45,128 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 49 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 64 [2021-11-09 10:40:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:45,129 INFO L225 Difference]: With dead ends: 119 [2021-11-09 10:40:45,129 INFO L226 Difference]: Without dead ends: 75 [2021-11-09 10:40:45,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=932, Invalid=11278, Unknown=0, NotChecked=0, Total=12210 [2021-11-09 10:40:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-09 10:40:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-11-09 10:40:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 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) [2021-11-09 10:40:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-11-09 10:40:45,144 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 64 [2021-11-09 10:40:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:45,144 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-11-09 10:40:45,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5510204081632653) internal successors, (125), 49 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) [2021-11-09 10:40:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-11-09 10:40:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 10:40:45,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:45,145 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:45,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:45,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:40:45,347 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1742430585, now seen corresponding path program 16 times [2021-11-09 10:40:45,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:45,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474551948] [2021-11-09 10:40:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:45,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:45,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:45,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474551948] [2021-11-09 10:40:45,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474551948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:45,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191169080] [2021-11-09 10:40:45,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:40:45,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:45,758 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:45,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:40:46,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:40:46,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:40:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:46,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:40:48,077 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:40:48,077 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 58 treesize of output 37 [2021-11-09 10:40:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 190 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:48,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191169080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:48,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:48,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2021-11-09 10:40:48,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496275397] [2021-11-09 10:40:48,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 10:40:48,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 10:40:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2457, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:40:48,115 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 53 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 53 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:50,884 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-11-09 10:40:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-09 10:40:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 53 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-09 10:40:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:50,885 INFO L225 Difference]: With dead ends: 129 [2021-11-09 10:40:50,885 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 10:40:50,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1059, Invalid=13461, Unknown=0, NotChecked=0, Total=14520 [2021-11-09 10:40:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 10:40:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-11-09 10:40:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-11-09 10:40:50,896 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 70 [2021-11-09 10:40:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:50,897 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-11-09 10:40:50,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 53 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-11-09 10:40:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 10:40:50,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:50,898 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:50,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:51,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:51,107 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1997172115, now seen corresponding path program 17 times [2021-11-09 10:40:51,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:51,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917371875] [2021-11-09 10:40:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:51,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:51,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:51,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917371875] [2021-11-09 10:40:51,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917371875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:51,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021008755] [2021-11-09 10:40:51,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:40:51,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:51,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:51,644 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:51,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:40:52,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-09 10:40:52,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 10:40:52,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:52,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:40:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:52,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021008755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:52,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:52,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 41 [2021-11-09 10:40:52,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377919759] [2021-11-09 10:40:52,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 10:40:52,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 10:40:52,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:40:52,956 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:53,969 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2021-11-09 10:40:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:40:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-09 10:40:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:53,970 INFO L225 Difference]: With dead ends: 87 [2021-11-09 10:40:53,970 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 10:40:53,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=2872, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 10:40:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 10:40:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-11-09 10:40:53,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 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) [2021-11-09 10:40:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-11-09 10:40:53,981 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2021-11-09 10:40:53,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:53,982 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-11-09 10:40:53,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:53,982 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-11-09 10:40:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:40:53,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:53,983 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:54,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:54,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:54,203 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash 516744323, now seen corresponding path program 18 times [2021-11-09 10:40:54,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:54,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730695690] [2021-11-09 10:40:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:54,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 243 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:54,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:54,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730695690] [2021-11-09 10:40:54,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730695690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:54,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539563720] [2021-11-09 10:40:54,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:40:54,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:54,524 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:54,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:40:55,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 10:40:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:40:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:40:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 288 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:55,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539563720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:55,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:55,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2021-11-09 10:40:55,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368703722] [2021-11-09 10:40:55,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 10:40:55,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 10:40:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:40:55,884 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:56,244 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-11-09 10:40:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:40:56,244 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:40:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:56,245 INFO L225 Difference]: With dead ends: 140 [2021-11-09 10:40:56,245 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 10:40:56,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=716, Invalid=2476, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 10:40:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 10:40:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-09 10:40:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-11-09 10:40:56,256 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2021-11-09 10:40:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:56,256 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-11-09 10:40:56,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:40:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-11-09 10:40:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:40:56,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:56,258 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:56,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-09 10:40:56,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 10:40:56,474 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:40:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash 260737761, now seen corresponding path program 19 times [2021-11-09 10:40:56,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:40:56,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952991296] [2021-11-09 10:40:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:56,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:40:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:57,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:40:57,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952991296] [2021-11-09 10:40:57,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952991296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:57,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887491592] [2021-11-09 10:40:57,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:40:57,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:40:57,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:40:57,287 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:40:57,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:40:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:57,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 10:40:57,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:58,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:40:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:58,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887491592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:40:58,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:40:58,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 59 [2021-11-09 10:40:58,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697510517] [2021-11-09 10:40:58,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 10:40:58,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:40:58,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 10:40:58,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3236, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 10:40:58,931 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 59 states, 59 states have (on average 2.7288135593220337) internal successors, (161), 59 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:00,070 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-11-09 10:41:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:41:00,072 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.7288135593220337) internal successors, (161), 59 states have internal predecessors, (161), 0 states have call successors, (0), 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 82 [2021-11-09 10:41:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:00,073 INFO L225 Difference]: With dead ends: 93 [2021-11-09 10:41:00,073 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 10:41:00,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=313, Invalid=5237, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 10:41:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 10:41:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-11-09 10:41:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-11-09 10:41:00,087 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2021-11-09 10:41:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:00,087 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-11-09 10:41:00,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.7288135593220337) internal successors, (161), 59 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-11-09 10:41:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 10:41:00,088 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:00,089 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:00,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:00,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 10:41:00,315 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash -393706761, now seen corresponding path program 20 times [2021-11-09 10:41:00,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:00,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071206097] [2021-11-09 10:41:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:00,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 289 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:00,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:00,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071206097] [2021-11-09 10:41:00,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071206097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:00,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423125770] [2021-11-09 10:41:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:41:00,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:00,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:00,723 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:00,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:41:01,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:41:01,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:01,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:41:01,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 338 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:02,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423125770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:02,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:02,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-11-09 10:41:02,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238730127] [2021-11-09 10:41:02,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 10:41:02,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 10:41:02,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:41:02,224 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:02,577 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2021-11-09 10:41:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:41:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 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 86 [2021-11-09 10:41:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:02,578 INFO L225 Difference]: With dead ends: 150 [2021-11-09 10:41:02,578 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 10:41:02,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=819, Invalid=2841, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 10:41:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 10:41:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-09 10:41:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-11-09 10:41:02,591 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-11-09 10:41:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:02,592 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-11-09 10:41:02,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-11-09 10:41:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 10:41:02,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:02,593 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:02,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:02,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:02,815 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1316711125, now seen corresponding path program 21 times [2021-11-09 10:41:02,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:02,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742514017] [2021-11-09 10:41:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:02,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:03,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:03,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742514017] [2021-11-09 10:41:03,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742514017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:03,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200061187] [2021-11-09 10:41:03,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:41:03,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:03,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:03,432 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:03,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:41:04,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 10:41:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:41:04,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:04,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:41:06,392 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:41:06,392 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 58 treesize of output 37 [2021-11-09 10:41:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 325 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:06,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200061187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:06,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:06,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 65 [2021-11-09 10:41:06,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117647745] [2021-11-09 10:41:06,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 10:41:06,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:06,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 10:41:06,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3723, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 10:41:06,446 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:10,471 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2021-11-09 10:41:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-09 10:41:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 0 states have call successors, (0), 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 88 [2021-11-09 10:41:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:10,472 INFO L225 Difference]: With dead ends: 159 [2021-11-09 10:41:10,472 INFO L226 Difference]: Without dead ends: 99 [2021-11-09 10:41:10,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5215 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1482, Invalid=21168, Unknown=0, NotChecked=0, Total=22650 [2021-11-09 10:41:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-09 10:41:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-11-09 10:41:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-09 10:41:10,484 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2021-11-09 10:41:10,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:10,484 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-09 10:41:10,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-09 10:41:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-09 10:41:10,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:10,485 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:10,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:10,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:10,703 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -890154423, now seen corresponding path program 22 times [2021-11-09 10:41:10,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:10,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625052376] [2021-11-09 10:41:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:10,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:11,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:11,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625052376] [2021-11-09 10:41:11,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625052376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:11,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966304665] [2021-11-09 10:41:11,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:41:11,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:11,430 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:11,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:41:12,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:41:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:12,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 10:41:12,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:13,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:41:15,203 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:41:15,203 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 58 treesize of output 37 [2021-11-09 10:41:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 378 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:15,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966304665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:15,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:15,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 69 [2021-11-09 10:41:15,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654023750] [2021-11-09 10:41:15,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-09 10:41:15,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:15,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-09 10:41:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4203, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 10:41:15,263 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 69 states, 69 states have (on average 2.681159420289855) internal successors, (185), 69 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:19,770 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2021-11-09 10:41:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-09 10:41:19,771 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.681159420289855) internal successors, (185), 69 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-09 10:41:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:19,772 INFO L225 Difference]: With dead ends: 169 [2021-11-09 10:41:19,772 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 10:41:19,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5946 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1637, Invalid=24123, Unknown=0, NotChecked=0, Total=25760 [2021-11-09 10:41:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 10:41:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2021-11-09 10:41:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 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) [2021-11-09 10:41:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-09 10:41:19,788 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 94 [2021-11-09 10:41:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:19,789 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-09 10:41:19,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.681159420289855) internal successors, (185), 69 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-09 10:41:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 10:41:19,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:19,790 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:19,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:19,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 10:41:19,999 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1772265155, now seen corresponding path program 23 times [2021-11-09 10:41:20,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:20,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909717097] [2021-11-09 10:41:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:20,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:20,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:20,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909717097] [2021-11-09 10:41:20,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909717097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:20,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571421016] [2021-11-09 10:41:20,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:41:20,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:20,875 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:20,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:41:22,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-09 10:41:22,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-09 10:41:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:22,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:41:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:23,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571421016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:23,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:23,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 53 [2021-11-09 10:41:23,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389905585] [2021-11-09 10:41:23,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 10:41:23,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 10:41:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2619, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:41:23,233 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:24,746 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2021-11-09 10:41:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 10:41:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 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 100 [2021-11-09 10:41:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:24,747 INFO L225 Difference]: With dead ends: 111 [2021-11-09 10:41:24,747 INFO L226 Difference]: Without dead ends: 109 [2021-11-09 10:41:24,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=4844, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 10:41:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-09 10:41:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-11-09 10:41:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-09 10:41:24,766 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2021-11-09 10:41:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:24,766 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-09 10:41:24,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-09 10:41:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-09 10:41:24,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:24,768 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:24,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:24,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:41:24,968 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2096051373, now seen corresponding path program 24 times [2021-11-09 10:41:24,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:24,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951107750] [2021-11-09 10:41:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:24,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 451 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:25,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:25,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951107750] [2021-11-09 10:41:25,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951107750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:25,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112152283] [2021-11-09 10:41:25,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:41:25,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:25,452 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:25,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:41:26,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-09 10:41:26,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:26,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:41:26,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 512 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:27,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112152283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:27,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:27,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2021-11-09 10:41:27,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249191891] [2021-11-09 10:41:27,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 10:41:27,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 10:41:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:41:27,595 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 55 states, 55 states have (on average 3.1454545454545455) internal successors, (173), 55 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:28,044 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2021-11-09 10:41:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:41:28,044 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.1454545454545455) internal successors, (173), 55 states have internal predecessors, (173), 0 states have call successors, (0), 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 104 [2021-11-09 10:41:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:28,045 INFO L225 Difference]: With dead ends: 180 [2021-11-09 10:41:28,045 INFO L226 Difference]: Without dead ends: 108 [2021-11-09 10:41:28,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1170, Invalid=4086, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 10:41:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-09 10:41:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-11-09 10:41:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-11-09 10:41:28,056 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2021-11-09 10:41:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:28,057 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-11-09 10:41:28,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.1454545454545455) internal successors, (173), 55 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-11-09 10:41:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 10:41:28,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:28,057 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:28,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:28,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:41:28,258 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 678999985, now seen corresponding path program 25 times [2021-11-09 10:41:28,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:28,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089903980] [2021-11-09 10:41:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:28,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:29,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:29,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089903980] [2021-11-09 10:41:29,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089903980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:29,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706329273] [2021-11-09 10:41:29,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:41:29,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:29,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:29,112 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:29,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:41:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:30,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-09 10:41:30,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:30,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:41:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:31,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706329273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:31,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:31,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 56 [2021-11-09 10:41:31,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542484305] [2021-11-09 10:41:31,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 10:41:31,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 10:41:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 10:41:31,252 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 56 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:32,938 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-11-09 10:41:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-09 10:41:32,938 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 56 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 10:41:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:32,939 INFO L225 Difference]: With dead ends: 117 [2021-11-09 10:41:32,939 INFO L226 Difference]: Without dead ends: 115 [2021-11-09 10:41:32,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=283, Invalid=5417, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 10:41:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-09 10:41:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-11-09 10:41:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-11-09 10:41:32,957 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2021-11-09 10:41:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:32,957 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-11-09 10:41:32,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 56 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-11-09 10:41:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-09 10:41:32,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:32,958 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:32,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:33,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:41:33,169 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1374930887, now seen corresponding path program 26 times [2021-11-09 10:41:33,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:33,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685238819] [2021-11-09 10:41:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:33,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 513 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:33,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:33,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685238819] [2021-11-09 10:41:33,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685238819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:33,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901473168] [2021-11-09 10:41:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:41:33,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:33,700 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:33,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:41:34,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:41:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:34,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:41:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:35,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901473168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:35,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:35,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2021-11-09 10:41:35,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944911432] [2021-11-09 10:41:35,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 10:41:35,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:35,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 10:41:35,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 10:41:35,593 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 58 states, 58 states have (on average 3.1551724137931036) internal successors, (183), 58 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:36,040 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-11-09 10:41:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:41:36,040 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.1551724137931036) internal successors, (183), 58 states have internal predecessors, (183), 0 states have call successors, (0), 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 110 [2021-11-09 10:41:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:36,041 INFO L225 Difference]: With dead ends: 190 [2021-11-09 10:41:36,041 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 10:41:36,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1301, Invalid=4551, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 10:41:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 10:41:36,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-09 10:41:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-11-09 10:41:36,053 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2021-11-09 10:41:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:36,054 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-11-09 10:41:36,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.1551724137931036) internal successors, (183), 58 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-11-09 10:41:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-09 10:41:36,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:36,054 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:36,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:36,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 10:41:36,255 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1186695771, now seen corresponding path program 27 times [2021-11-09 10:41:36,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:36,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658126587] [2021-11-09 10:41:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:36,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:37,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:37,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658126587] [2021-11-09 10:41:37,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658126587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:37,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413955019] [2021-11-09 10:41:37,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:41:37,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:37,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:37,071 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:37,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:41:38,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-09 10:41:38,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 10:41:38,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:41:41,953 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:41:41,954 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 58 treesize of output 37 [2021-11-09 10:41:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 561 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:42,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413955019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:42,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:42,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 81 [2021-11-09 10:41:42,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442827020] [2021-11-09 10:41:42,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-09 10:41:42,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-09 10:41:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=5817, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 10:41:42,021 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 81 states, 81 states have (on average 2.728395061728395) internal successors, (221), 81 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:48,390 INFO L93 Difference]: Finished difference Result 199 states and 202 transitions. [2021-11-09 10:41:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-09 10:41:48,390 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.728395061728395) internal successors, (221), 81 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-09 10:41:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:48,391 INFO L225 Difference]: With dead ends: 199 [2021-11-09 10:41:48,391 INFO L226 Difference]: Without dead ends: 123 [2021-11-09 10:41:48,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8427 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2144, Invalid=34146, Unknown=0, NotChecked=0, Total=36290 [2021-11-09 10:41:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-09 10:41:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2021-11-09 10:41:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-11-09 10:41:48,410 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 112 [2021-11-09 10:41:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:48,410 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-11-09 10:41:48,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.728395061728395) internal successors, (221), 81 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:41:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-11-09 10:41:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-09 10:41:48,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:48,411 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:41:48,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:48,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:48,619 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:41:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash 453622553, now seen corresponding path program 28 times [2021-11-09 10:41:48,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:41:48,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187681525] [2021-11-09 10:41:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:48,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:41:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:49,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:41:49,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187681525] [2021-11-09 10:41:49,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187681525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:49,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347607714] [2021-11-09 10:41:49,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:41:49,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:41:49,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:41:49,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:41:49,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:41:51,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:41:51,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 10:41:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:52,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:41:55,225 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:41:55,226 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 58 treesize of output 37 [2021-11-09 10:41:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 630 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:55,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347607714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:41:55,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:55,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 85 [2021-11-09 10:41:55,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367972862] [2021-11-09 10:41:55,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 10:41:55,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:41:55,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 10:41:55,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=6413, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 10:41:55,281 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 85 states, 85 states have (on average 2.7411764705882353) internal successors, (233), 85 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:02,141 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2021-11-09 10:42:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-09 10:42:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.7411764705882353) internal successors, (233), 85 states have internal predecessors, (233), 0 states have call successors, (0), 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 118 [2021-11-09 10:42:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:02,142 INFO L225 Difference]: With dead ends: 209 [2021-11-09 10:42:02,142 INFO L226 Difference]: Without dead ends: 129 [2021-11-09 10:42:02,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9350 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2327, Invalid=37873, Unknown=0, NotChecked=0, Total=40200 [2021-11-09 10:42:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-09 10:42:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2021-11-09 10:42:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 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) [2021-11-09 10:42:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-11-09 10:42:02,160 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 118 [2021-11-09 10:42:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:02,160 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-11-09 10:42:02,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.7411764705882353) internal successors, (233), 85 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-11-09 10:42:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-09 10:42:02,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:02,162 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:02,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:02,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:02,383 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:02,383 INFO L85 PathProgramCache]: Analyzing trace with hash 341420045, now seen corresponding path program 29 times [2021-11-09 10:42:02,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:02,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954279919] [2021-11-09 10:42:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:02,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:03,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:03,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954279919] [2021-11-09 10:42:03,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954279919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:03,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642554959] [2021-11-09 10:42:03,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:03,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:03,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:03,393 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:03,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 10:42:05,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-09 10:42:05,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:05,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-09 10:42:05,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:05,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:42:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:06,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642554959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:06,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:06,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 65 [2021-11-09 10:42:06,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836031808] [2021-11-09 10:42:06,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 10:42:06,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 10:42:06,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3991, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 10:42:06,709 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 65 states, 65 states have (on average 3.0923076923076924) internal successors, (201), 65 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:08,938 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2021-11-09 10:42:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 10:42:08,938 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0923076923076924) internal successors, (201), 65 states have internal predecessors, (201), 0 states have call successors, (0), 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 124 [2021-11-09 10:42:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:08,942 INFO L225 Difference]: With dead ends: 135 [2021-11-09 10:42:08,942 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 10:42:08,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=328, Invalid=7328, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 10:42:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 10:42:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-11-09 10:42:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-11-09 10:42:08,961 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2021-11-09 10:42:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:08,961 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-11-09 10:42:08,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0923076923076924) internal successors, (201), 65 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-11-09 10:42:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-09 10:42:08,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:08,962 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:08,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:09,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:09,175 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:09,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:09,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1997723101, now seen corresponding path program 30 times [2021-11-09 10:42:09,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:09,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86480743] [2021-11-09 10:42:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:09,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 723 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:09,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:09,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86480743] [2021-11-09 10:42:09,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86480743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:09,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447324926] [2021-11-09 10:42:09,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:09,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:09,975 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:09,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 10:42:13,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-09 10:42:13,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:13,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 10:42:13,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 800 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:14,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447324926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:14,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:14,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2021-11-09 10:42:14,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775618346] [2021-11-09 10:42:14,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 10:42:14,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 10:42:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=3427, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 10:42:14,347 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 67 states, 67 states have (on average 3.1791044776119404) internal successors, (213), 67 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:15,035 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2021-11-09 10:42:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:42:15,036 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.1791044776119404) internal successors, (213), 67 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-09 10:42:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:15,037 INFO L225 Difference]: With dead ends: 220 [2021-11-09 10:42:15,037 INFO L226 Difference]: Without dead ends: 132 [2021-11-09 10:42:15,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1736, Invalid=6096, Unknown=0, NotChecked=0, Total=7832 [2021-11-09 10:42:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-09 10:42:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-11-09 10:42:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-11-09 10:42:15,059 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2021-11-09 10:42:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:15,059 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-11-09 10:42:15,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.1791044776119404) internal successors, (213), 67 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-11-09 10:42:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-09 10:42:15,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:15,061 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:15,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:15,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:15,287 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash 973954177, now seen corresponding path program 31 times [2021-11-09 10:42:15,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:15,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653867135] [2021-11-09 10:42:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:15,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:16,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:16,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653867135] [2021-11-09 10:42:16,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653867135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:16,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683036980] [2021-11-09 10:42:16,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:16,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:16,514 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:16,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 10:42:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-09 10:42:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:18,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:42:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:19,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683036980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:19,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:19,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 68 [2021-11-09 10:42:19,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640420750] [2021-11-09 10:42:19,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 10:42:19,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 10:42:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4379, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 10:42:19,540 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 68 states, 68 states have (on average 3.1029411764705883) internal successors, (211), 68 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:21,924 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2021-11-09 10:42:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 10:42:21,925 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1029411764705883) internal successors, (211), 68 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-09 10:42:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:21,925 INFO L225 Difference]: With dead ends: 141 [2021-11-09 10:42:21,926 INFO L226 Difference]: Without dead ends: 139 [2021-11-09 10:42:21,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=343, Invalid=8029, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 10:42:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-09 10:42:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2021-11-09 10:42:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-11-09 10:42:21,955 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2021-11-09 10:42:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:21,956 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-11-09 10:42:21,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1029411764705883) internal successors, (211), 68 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-11-09 10:42:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-09 10:42:21,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:21,957 INFO L513 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:22,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-09 10:42:22,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 10:42:22,183 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1945533289, now seen corresponding path program 32 times [2021-11-09 10:42:22,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:22,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675007477] [2021-11-09 10:42:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:22,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 801 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:23,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:23,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675007477] [2021-11-09 10:42:23,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675007477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:23,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282841132] [2021-11-09 10:42:23,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:23,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:23,044 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:23,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 10:42:24,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:24,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:24,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 10:42:24,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 882 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:25,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282841132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:25,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:25,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2021-11-09 10:42:25,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881996092] [2021-11-09 10:42:25,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-09 10:42:25,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-09 10:42:25,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=3744, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 10:42:25,739 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 70 states, 70 states have (on average 3.1857142857142855) internal successors, (223), 70 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:26,397 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2021-11-09 10:42:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 10:42:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.1857142857142855) internal successors, (223), 70 states have internal predecessors, (223), 0 states have call successors, (0), 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 134 [2021-11-09 10:42:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:26,398 INFO L225 Difference]: With dead ends: 230 [2021-11-09 10:42:26,399 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 10:42:26,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1895, Invalid=6661, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 10:42:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 10:42:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-09 10:42:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-11-09 10:42:26,424 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2021-11-09 10:42:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-11-09 10:42:26,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.1857142857142855) internal successors, (223), 70 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-11-09 10:42:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-09 10:42:26,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:26,426 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:26,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:26,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 10:42:26,651 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1229322357, now seen corresponding path program 33 times [2021-11-09 10:42:26,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:26,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293760089] [2021-11-09 10:42:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:26,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 1366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:27,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:27,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293760089] [2021-11-09 10:42:27,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293760089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:27,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682642936] [2021-11-09 10:42:27,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:27,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:27,903 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:27,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 10:42:32,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-09 10:42:32,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 10:42:32,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:33,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:42:37,004 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:42:37,004 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 58 treesize of output 37 [2021-11-09 10:42:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 861 proven. 505 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:37,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682642936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:37,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:37,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 97 [2021-11-09 10:42:37,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905258819] [2021-11-09 10:42:37,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-09 10:42:37,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:37,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-09 10:42:37,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=8375, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 10:42:37,074 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 97 states, 97 states have (on average 2.7731958762886597) internal successors, (269), 97 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:45,866 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-11-09 10:42:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-09 10:42:45,867 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.7731958762886597) internal successors, (269), 97 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-09 10:42:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:45,868 INFO L225 Difference]: With dead ends: 239 [2021-11-09 10:42:45,868 INFO L226 Difference]: Without dead ends: 147 [2021-11-09 10:42:45,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12407 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2918, Invalid=50212, Unknown=0, NotChecked=0, Total=53130 [2021-11-09 10:42:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-09 10:42:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-11-09 10:42:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-11-09 10:42:45,905 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 136 [2021-11-09 10:42:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:45,906 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-11-09 10:42:45,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.7731958762886597) internal successors, (269), 97 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:42:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-11-09 10:42:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-09 10:42:45,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:45,908 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:45,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:46,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 10:42:46,111 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:46,112 INFO L85 PathProgramCache]: Analyzing trace with hash 23895017, now seen corresponding path program 34 times [2021-11-09 10:42:46,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:46,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573764171] [2021-11-09 10:42:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:46,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 0 proven. 1497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:47,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:47,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573764171] [2021-11-09 10:42:47,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573764171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:47,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288803018] [2021-11-09 10:42:47,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:47,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:47,503 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:47,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 10:42:50,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 10:42:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:51,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:42:55,323 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:42:55,323 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 58 treesize of output 37 [2021-11-09 10:42:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 946 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:55,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288803018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:55,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:55,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52] total 101 [2021-11-09 10:42:55,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282274025] [2021-11-09 10:42:55,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-09 10:42:55,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-09 10:42:55,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=9087, Unknown=0, NotChecked=0, Total=10100 [2021-11-09 10:42:55,388 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 101 states, 101 states have (on average 2.782178217821782) internal successors, (281), 101 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:04,885 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2021-11-09 10:43:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-09 10:43:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.782178217821782) internal successors, (281), 101 states have internal predecessors, (281), 0 states have call successors, (0), 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 142 [2021-11-09 10:43:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:04,892 INFO L225 Difference]: With dead ends: 249 [2021-11-09 10:43:04,892 INFO L226 Difference]: Without dead ends: 153 [2021-11-09 10:43:04,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13522 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3129, Invalid=54711, Unknown=0, NotChecked=0, Total=57840 [2021-11-09 10:43:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-09 10:43:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2021-11-09 10:43:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-11-09 10:43:04,928 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 142 [2021-11-09 10:43:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:04,928 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-11-09 10:43:04,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.782178217821782) internal successors, (281), 101 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-11-09 10:43:04,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-09 10:43:04,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:04,930 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:04,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:05,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:05,155 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2117232349, now seen corresponding path program 35 times [2021-11-09 10:43:05,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:05,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932126217] [2021-11-09 10:43:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:05,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:06,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:06,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932126217] [2021-11-09 10:43:06,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932126217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:06,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673545683] [2021-11-09 10:43:06,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:43:06,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:06,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:06,913 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:06,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 10:43:10,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-11-09 10:43:10,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:10,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-09 10:43:10,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:10,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:43:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:12,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673545683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:12,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:12,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 77 [2021-11-09 10:43:12,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173782689] [2021-11-09 10:43:12,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-09 10:43:12,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-09 10:43:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=5651, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 10:43:12,376 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 77 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 77 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:15,719 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2021-11-09 10:43:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-09 10:43:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 77 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-09 10:43:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:15,720 INFO L225 Difference]: With dead ends: 159 [2021-11-09 10:43:15,721 INFO L226 Difference]: Without dead ends: 157 [2021-11-09 10:43:15,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=388, Invalid=10324, Unknown=0, NotChecked=0, Total=10712 [2021-11-09 10:43:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-09 10:43:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2021-11-09 10:43:15,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-11-09 10:43:15,755 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2021-11-09 10:43:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:15,755 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-11-09 10:43:15,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 77 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-11-09 10:43:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 10:43:15,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:15,757 INFO L513 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:15,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:15,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 10:43:15,971 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash -945159949, now seen corresponding path program 36 times [2021-11-09 10:43:15,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:15,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572782232] [2021-11-09 10:43:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:15,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 1059 proven. 669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:16,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:16,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572782232] [2021-11-09 10:43:16,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572782232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:16,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338025742] [2021-11-09 10:43:16,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:43:16,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:16,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:16,847 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:16,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 10:43:24,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-09 10:43:24,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 10:43:24,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 1152 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:26,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338025742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:26,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:26,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2021-11-09 10:43:26,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031947242] [2021-11-09 10:43:26,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-09 10:43:26,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:26,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-09 10:43:26,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=4779, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 10:43:26,045 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 79 states, 79 states have (on average 3.2025316455696204) internal successors, (253), 79 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:27,158 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-11-09 10:43:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 10:43:27,158 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.2025316455696204) internal successors, (253), 79 states have internal predecessors, (253), 0 states have call successors, (0), 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 152 [2021-11-09 10:43:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:27,160 INFO L225 Difference]: With dead ends: 260 [2021-11-09 10:43:27,160 INFO L226 Difference]: Without dead ends: 156 [2021-11-09 10:43:27,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2414, Invalid=8506, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 10:43:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-09 10:43:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-09 10:43:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-11-09 10:43:27,206 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2021-11-09 10:43:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:27,207 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-11-09 10:43:27,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.2025316455696204) internal successors, (253), 79 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-11-09 10:43:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-09 10:43:27,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:27,209 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:27,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:27,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 10:43:27,410 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash 294680913, now seen corresponding path program 37 times [2021-11-09 10:43:27,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:27,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812639902] [2021-11-09 10:43:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:27,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 0 proven. 1777 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:29,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:29,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812639902] [2021-11-09 10:43:29,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812639902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:29,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210639839] [2021-11-09 10:43:29,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:43:29,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:29,197 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:29,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 10:43:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:31,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-09 10:43:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:31,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:43:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 0 proven. 1777 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:33,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210639839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:33,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:33,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 80 [2021-11-09 10:43:33,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783784071] [2021-11-09 10:43:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 10:43:33,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 10:43:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=6111, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 10:43:33,444 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 80 states, 80 states have (on average 3.1375) internal successors, (251), 80 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:36,747 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2021-11-09 10:43:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-09 10:43:36,747 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.1375) internal successors, (251), 80 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-09 10:43:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:36,748 INFO L225 Difference]: With dead ends: 165 [2021-11-09 10:43:36,748 INFO L226 Difference]: Without dead ends: 163 [2021-11-09 10:43:36,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=403, Invalid=11153, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 10:43:36,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-09 10:43:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2021-11-09 10:43:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-11-09 10:43:36,782 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2021-11-09 10:43:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:36,782 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-11-09 10:43:36,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.1375) internal successors, (251), 80 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-11-09 10:43:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-09 10:43:36,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:36,783 INFO L513 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:36,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:36,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:43:36,983 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:36,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2146322073, now seen corresponding path program 38 times [2021-11-09 10:43:36,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:36,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167328218] [2021-11-09 10:43:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:36,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 1153 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:38,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:38,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167328218] [2021-11-09 10:43:38,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167328218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:38,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823948498] [2021-11-09 10:43:38,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:38,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:38,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:38,121 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:38,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 10:43:40,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:40,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 10:43:40,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 1250 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:42,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823948498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:42,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:42,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2021-11-09 10:43:42,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637535359] [2021-11-09 10:43:42,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-09 10:43:42,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-09 10:43:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=5152, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 10:43:42,013 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 82 states, 82 states have (on average 3.207317073170732) internal successors, (263), 82 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:42,978 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2021-11-09 10:43:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 10:43:42,978 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.207317073170732) internal successors, (263), 82 states have internal predecessors, (263), 0 states have call successors, (0), 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 158 [2021-11-09 10:43:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:42,979 INFO L225 Difference]: With dead ends: 270 [2021-11-09 10:43:42,979 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 10:43:42,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2601, Invalid=9171, Unknown=0, NotChecked=0, Total=11772 [2021-11-09 10:43:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 10:43:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-11-09 10:43:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-11-09 10:43:43,007 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2021-11-09 10:43:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:43,007 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-11-09 10:43:43,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.207317073170732) internal successors, (263), 82 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:43:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-11-09 10:43:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-09 10:43:43,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:43,009 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:43,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-09 10:43:43,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 10:43:43,216 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:43,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1647840443, now seen corresponding path program 39 times [2021-11-09 10:43:43,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:43,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807712577] [2021-11-09 10:43:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:43,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:43:45,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:45,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807712577] [2021-11-09 10:43:45,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807712577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:45,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075096791] [2021-11-09 10:43:45,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:43:45,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:45,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:45,023 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:45,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 10:43:57,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-09 10:43:57,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 10:43:57,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:59,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:44:03,441 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:44:03,441 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 58 treesize of output 37 [2021-11-09 10:44:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 1225 proven. 701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:03,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075096791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:03,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:03,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 113 [2021-11-09 10:44:03,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724478054] [2021-11-09 10:44:03,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-09 10:44:03,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-09 10:44:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=11397, Unknown=0, NotChecked=0, Total=12656 [2021-11-09 10:44:03,530 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 113 states, 113 states have (on average 2.8053097345132745) internal successors, (317), 113 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:15,215 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2021-11-09 10:44:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-11-09 10:44:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.8053097345132745) internal successors, (317), 113 states have internal predecessors, (317), 0 states have call successors, (0), 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 160 [2021-11-09 10:44:15,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:15,217 INFO L225 Difference]: With dead ends: 279 [2021-11-09 10:44:15,217 INFO L226 Difference]: Without dead ends: 171 [2021-11-09 10:44:15,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17155 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=3804, Invalid=69366, Unknown=0, NotChecked=0, Total=73170 [2021-11-09 10:44:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-09 10:44:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2021-11-09 10:44:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2021-11-09 10:44:15,255 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 160 [2021-11-09 10:44:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:15,255 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2021-11-09 10:44:15,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.8053097345132745) internal successors, (317), 113 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2021-11-09 10:44:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 10:44:15,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:15,257 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:15,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:15,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:15,471 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1868690617, now seen corresponding path program 40 times [2021-11-09 10:44:15,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:15,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697723660] [2021-11-09 10:44:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:15,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 0 proven. 2081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:17,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:17,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697723660] [2021-11-09 10:44:17,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697723660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:17,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169455315] [2021-11-09 10:44:17,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:17,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:17,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:17,423 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:17,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 10:44:26,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:26,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:26,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 10:44:26,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:27,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:44:31,717 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:44:31,717 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 58 treesize of output 37 [2021-11-09 10:44:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1326 proven. 755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:31,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169455315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:31,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:31,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60] total 117 [2021-11-09 10:44:31,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589057176] [2021-11-09 10:44:31,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-09 10:44:31,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:31,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-09 10:44:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1347, Invalid=12225, Unknown=0, NotChecked=0, Total=13572 [2021-11-09 10:44:31,790 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 117 states, 117 states have (on average 2.8119658119658117) internal successors, (329), 117 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:43,549 INFO L93 Difference]: Finished difference Result 289 states and 292 transitions. [2021-11-09 10:44:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-11-09 10:44:43,549 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.8119658119658117) internal successors, (329), 117 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-09 10:44:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:43,551 INFO L225 Difference]: With dead ends: 289 [2021-11-09 10:44:43,551 INFO L226 Difference]: Without dead ends: 177 [2021-11-09 10:44:43,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18462 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=4043, Invalid=74637, Unknown=0, NotChecked=0, Total=78680 [2021-11-09 10:44:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-09 10:44:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 173. [2021-11-09 10:44:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-11-09 10:44:43,594 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 166 [2021-11-09 10:44:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:43,594 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-11-09 10:44:43,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.8119658119658117) internal successors, (329), 117 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-11-09 10:44:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-09 10:44:43,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:43,596 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:43,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:43,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 10:44:43,811 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1758487123, now seen corresponding path program 41 times [2021-11-09 10:44:43,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:43,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479058151] [2021-11-09 10:44:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:43,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 0 proven. 2242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:45,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:45,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479058151] [2021-11-09 10:44:45,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479058151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:45,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458029186] [2021-11-09 10:44:45,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:45,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:45,728 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:45,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 10:44:49,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-11-09 10:44:49,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:49,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-09 10:44:49,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:44:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 0 proven. 2242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:52,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458029186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:52,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:52,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 89 [2021-11-09 10:44:52,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291408915] [2021-11-09 10:44:52,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-09 10:44:52,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-09 10:44:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=7599, Unknown=0, NotChecked=0, Total=7832 [2021-11-09 10:44:52,286 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 89 states, 89 states have (on average 3.157303370786517) internal successors, (281), 89 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:56,110 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2021-11-09 10:44:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-09 10:44:56,111 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.157303370786517) internal successors, (281), 89 states have internal predecessors, (281), 0 states have call successors, (0), 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 172 [2021-11-09 10:44:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:56,112 INFO L225 Difference]: With dead ends: 183 [2021-11-09 10:44:56,112 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 10:44:56,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=448, Invalid=13832, Unknown=0, NotChecked=0, Total=14280 [2021-11-09 10:44:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 10:44:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-11-09 10:44:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-11-09 10:44:56,138 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2021-11-09 10:44:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:56,138 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-11-09 10:44:56,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.157303370786517) internal successors, (281), 89 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-11-09 10:44:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-09 10:44:56,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:56,139 INFO L513 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:56,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:56,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 10:44:56,340 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:56,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash 512708547, now seen corresponding path program 42 times [2021-11-09 10:44:56,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:56,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756341588] [2021-11-09 10:44:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:56,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 1459 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:57,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:57,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756341588] [2021-11-09 10:44:57,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756341588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:57,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221141990] [2021-11-09 10:44:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:57,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:57,635 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:57,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 10:45:04,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-09 10:45:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 10:45:04,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 1568 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:06,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221141990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:06,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:06,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2021-11-09 10:45:06,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897372159] [2021-11-09 10:45:06,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-09 10:45:06,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:06,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-09 10:45:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=6355, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 10:45:06,319 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 91 states, 91 states have (on average 3.21978021978022) internal successors, (293), 91 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:07,265 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2021-11-09 10:45:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 10:45:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.21978021978022) internal successors, (293), 91 states have internal predecessors, (293), 0 states have call successors, (0), 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 176 [2021-11-09 10:45:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:07,267 INFO L225 Difference]: With dead ends: 300 [2021-11-09 10:45:07,267 INFO L226 Difference]: Without dead ends: 180 [2021-11-09 10:45:07,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3204, Invalid=11316, Unknown=0, NotChecked=0, Total=14520 [2021-11-09 10:45:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-09 10:45:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-11-09 10:45:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-11-09 10:45:07,316 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2021-11-09 10:45:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:07,316 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-11-09 10:45:07,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.21978021978022) internal successors, (293), 91 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-11-09 10:45:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-09 10:45:07,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:07,318 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:07,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:07,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:07,531 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:07,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1001779679, now seen corresponding path program 43 times [2021-11-09 10:45:07,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:07,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981774434] [2021-11-09 10:45:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:07,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 0 proven. 2409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:09,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:09,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981774434] [2021-11-09 10:45:09,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981774434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:09,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754457594] [2021-11-09 10:45:09,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:45:09,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:09,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:09,444 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:09,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 10:45:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-09 10:45:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:12,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:45:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 0 proven. 2409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:14,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754457594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:14,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:14,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 92 [2021-11-09 10:45:14,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760732361] [2021-11-09 10:45:14,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-09 10:45:14,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-09 10:45:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=8131, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 10:45:14,707 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 92 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:18,907 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2021-11-09 10:45:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-09 10:45:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 92 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-09 10:45:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:18,908 INFO L225 Difference]: With dead ends: 189 [2021-11-09 10:45:18,908 INFO L226 Difference]: Without dead ends: 187 [2021-11-09 10:45:18,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=463, Invalid=14789, Unknown=0, NotChecked=0, Total=15252 [2021-11-09 10:45:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-09 10:45:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-11-09 10:45:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2021-11-09 10:45:18,941 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2021-11-09 10:45:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:18,941 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2021-11-09 10:45:18,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 92 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2021-11-09 10:45:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-09 10:45:18,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:18,942 INFO L513 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:18,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:19,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 10:45:19,143 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1599366711, now seen corresponding path program 44 times [2021-11-09 10:45:19,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:19,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86112661] [2021-11-09 10:45:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:19,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 1569 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:20,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:20,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86112661] [2021-11-09 10:45:20,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86112661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:20,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684761586] [2021-11-09 10:45:20,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:20,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:20,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:20,471 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:20,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 10:45:23,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:23,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 10:45:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 1682 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:25,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684761586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:25,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:25,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2021-11-09 10:45:25,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959372149] [2021-11-09 10:45:25,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-09 10:45:25,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:25,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-09 10:45:25,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=6784, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 10:45:25,214 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 94 states, 94 states have (on average 3.223404255319149) internal successors, (303), 94 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:26,354 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2021-11-09 10:45:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 10:45:26,355 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.223404255319149) internal successors, (303), 94 states have internal predecessors, (303), 0 states have call successors, (0), 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 182 [2021-11-09 10:45:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:26,356 INFO L225 Difference]: With dead ends: 310 [2021-11-09 10:45:26,356 INFO L226 Difference]: Without dead ends: 186 [2021-11-09 10:45:26,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3419, Invalid=12081, Unknown=0, NotChecked=0, Total=15500 [2021-11-09 10:45:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-09 10:45:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-11-09 10:45:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-11-09 10:45:26,387 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2021-11-09 10:45:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:26,388 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-11-09 10:45:26,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.223404255319149) internal successors, (303), 94 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-11-09 10:45:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-09 10:45:26,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:26,390 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:26,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:26,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 10:45:26,607 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:26,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1642961387, now seen corresponding path program 45 times [2021-11-09 10:45:26,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:26,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162327989] [2021-11-09 10:45:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:26,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 0 proven. 2582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:28,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:28,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162327989] [2021-11-09 10:45:28,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162327989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:28,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643238023] [2021-11-09 10:45:28,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:28,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:28,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:28,551 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:28,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 10:46:51,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-09 10:46:51,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:52,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 10:46:52,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:53,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:46:58,892 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:46:58,893 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 58 treesize of output 37 [2021-11-09 10:46:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 1653 proven. 929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:58,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643238023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:58,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:58,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 129 [2021-11-09 10:46:58,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976906017] [2021-11-09 10:46:58,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-11-09 10:46:58,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-11-09 10:46:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1629, Invalid=14883, Unknown=0, NotChecked=0, Total=16512 [2021-11-09 10:46:58,971 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 129 states, 129 states have (on average 2.8294573643410854) internal successors, (365), 129 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:13,706 INFO L93 Difference]: Finished difference Result 319 states and 322 transitions. [2021-11-09 10:47:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-11-09 10:47:13,706 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.8294573643410854) internal successors, (365), 129 states have internal predecessors, (365), 0 states have call successors, (0), 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 184 [2021-11-09 10:47:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:13,707 INFO L225 Difference]: With dead ends: 319 [2021-11-09 10:47:13,707 INFO L226 Difference]: Without dead ends: 195 [2021-11-09 10:47:13,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22671 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=4802, Invalid=91608, Unknown=0, NotChecked=0, Total=96410 [2021-11-09 10:47:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-09 10:47:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2021-11-09 10:47:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2021-11-09 10:47:13,741 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 184 [2021-11-09 10:47:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:13,741 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2021-11-09 10:47:13,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.8294573643410854) internal successors, (365), 129 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2021-11-09 10:47:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-09 10:47:13,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:13,742 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:13,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-09 10:47:13,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 10:47:13,943 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1640905335, now seen corresponding path program 46 times [2021-11-09 10:47:13,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:13,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53777411] [2021-11-09 10:47:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:13,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 0 proven. 2761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:16,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:16,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53777411] [2021-11-09 10:47:16,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53777411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:16,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181677539] [2021-11-09 10:47:16,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:47:16,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:16,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:16,068 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:16,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 10:47:26,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:47:26,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 10:47:26,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:28,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:47:33,386 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:47:33,387 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 58 treesize of output 37 [2021-11-09 10:47:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 1770 proven. 991 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:33,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181677539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:33,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:33,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 68] total 133 [2021-11-09 10:47:33,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595421070] [2021-11-09 10:47:33,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-11-09 10:47:33,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:33,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-11-09 10:47:33,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1729, Invalid=15827, Unknown=0, NotChecked=0, Total=17556 [2021-11-09 10:47:33,467 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 133 states, 133 states have (on average 2.8345864661654137) internal successors, (377), 133 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:48,322 INFO L93 Difference]: Finished difference Result 329 states and 332 transitions. [2021-11-09 10:47:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-11-09 10:47:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.8345864661654137) internal successors, (377), 133 states have internal predecessors, (377), 0 states have call successors, (0), 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 190 [2021-11-09 10:47:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:48,324 INFO L225 Difference]: With dead ends: 329 [2021-11-09 10:47:48,324 INFO L226 Difference]: Without dead ends: 201 [2021-11-09 10:47:48,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24170 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=5069, Invalid=97651, Unknown=0, NotChecked=0, Total=102720 [2021-11-09 10:47:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-09 10:47:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2021-11-09 10:47:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-09 10:47:48,361 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 190 [2021-11-09 10:47:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:48,361 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-09 10:47:48,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.8345864661654137) internal successors, (377), 133 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-09 10:47:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-09 10:47:48,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:48,362 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:48,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:48,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 10:47:48,563 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:48,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:48,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1788431485, now seen corresponding path program 47 times [2021-11-09 10:47:48,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:48,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131221653] [2021-11-09 10:47:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:48,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2946 backedges. 0 proven. 2946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:50,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:50,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131221653] [2021-11-09 10:47:50,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131221653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:50,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494818822] [2021-11-09 10:47:50,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:47:50,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:50,759 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:50,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 10:48:18,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-11-09 10:48:18,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-09 10:48:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:18,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:48:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2946 backedges. 0 proven. 2946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494818822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:21,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:21,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 101 [2021-11-09 10:48:21,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307710234] [2021-11-09 10:48:21,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-09 10:48:21,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:21,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-09 10:48:21,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=9835, Unknown=0, NotChecked=0, Total=10100 [2021-11-09 10:48:21,205 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 101 states, 101 states have (on average 3.1782178217821784) internal successors, (321), 101 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) [2021-11-09 10:48:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:26,066 INFO L93 Difference]: Finished difference Result 207 states and 208 transitions. [2021-11-09 10:48:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-09 10:48:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.1782178217821784) internal successors, (321), 101 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) Word has length 196 [2021-11-09 10:48:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:26,068 INFO L225 Difference]: With dead ends: 207 [2021-11-09 10:48:26,068 INFO L226 Difference]: Without dead ends: 205 [2021-11-09 10:48:26,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=508, Invalid=17852, Unknown=0, NotChecked=0, Total=18360 [2021-11-09 10:48:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-09 10:48:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2021-11-09 10:48:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2021-11-09 10:48:26,100 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2021-11-09 10:48:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:26,100 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2021-11-09 10:48:26,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.1782178217821784) internal successors, (321), 101 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) [2021-11-09 10:48:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2021-11-09 10:48:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-09 10:48:26,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:26,101 INFO L513 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:26,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:26,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 10:48:26,303 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:26,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1260054893, now seen corresponding path program 48 times [2021-11-09 10:48:26,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:26,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534073986] [2021-11-09 10:48:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:26,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 1923 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:27,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:27,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534073986] [2021-11-09 10:48:27,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534073986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:27,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703100198] [2021-11-09 10:48:27,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:48:27,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:27,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:27,686 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:27,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 10:49:11,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-11-09 10:49:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:11,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 10:49:11,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2048 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:14,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703100198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:14,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:14,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2021-11-09 10:49:14,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552545889] [2021-11-09 10:49:14,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-09 10:49:14,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-09 10:49:14,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=8155, Unknown=0, NotChecked=0, Total=10506 [2021-11-09 10:49:14,098 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 103 states, 103 states have (on average 3.233009708737864) internal successors, (333), 103 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:15,440 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2021-11-09 10:49:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 10:49:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.233009708737864) internal successors, (333), 103 states have internal predecessors, (333), 0 states have call successors, (0), 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 200 [2021-11-09 10:49:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:15,441 INFO L225 Difference]: With dead ends: 340 [2021-11-09 10:49:15,442 INFO L226 Difference]: Without dead ends: 204 [2021-11-09 10:49:15,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4017 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4106, Invalid=14526, Unknown=0, NotChecked=0, Total=18632 [2021-11-09 10:49:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-09 10:49:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-11-09 10:49:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2021-11-09 10:49:15,488 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2021-11-09 10:49:15,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:15,488 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2021-11-09 10:49:15,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.233009708737864) internal successors, (333), 103 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2021-11-09 10:49:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-09 10:49:15,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:15,490 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:15,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:15,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:15,703 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1350427919, now seen corresponding path program 49 times [2021-11-09 10:49:15,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:15,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217576272] [2021-11-09 10:49:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:15,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 0 proven. 3137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:17,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:17,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217576272] [2021-11-09 10:49:17,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217576272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:17,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422571421] [2021-11-09 10:49:17,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:49:17,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:17,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:17,979 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:17,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 10:49:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:21,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-09 10:49:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:49:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 0 proven. 3137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:24,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422571421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:24,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:24,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 104 [2021-11-09 10:49:24,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680888686] [2021-11-09 10:49:24,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-09 10:49:24,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-09 10:49:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=10439, Unknown=0, NotChecked=0, Total=10712 [2021-11-09 10:49:24,621 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 104 states, 104 states have (on average 3.1826923076923075) internal successors, (331), 104 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:29,914 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2021-11-09 10:49:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-09 10:49:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.1826923076923075) internal successors, (331), 104 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-09 10:49:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:29,915 INFO L225 Difference]: With dead ends: 213 [2021-11-09 10:49:29,915 INFO L226 Difference]: Without dead ends: 211 [2021-11-09 10:49:29,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=523, Invalid=18937, Unknown=0, NotChecked=0, Total=19460 [2021-11-09 10:49:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-09 10:49:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2021-11-09 10:49:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2021-11-09 10:49:29,959 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2021-11-09 10:49:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:29,959 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2021-11-09 10:49:29,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.1826923076923075) internal successors, (331), 104 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2021-11-09 10:49:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-09 10:49:29,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:29,961 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:30,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:30,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:30,175 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:30,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1558607097, now seen corresponding path program 50 times [2021-11-09 10:49:30,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:30,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664075795] [2021-11-09 10:49:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:30,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 2049 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:31,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:31,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664075795] [2021-11-09 10:49:31,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664075795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:31,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338864349] [2021-11-09 10:49:31,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:49:31,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:31,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:31,740 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:31,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 10:49:35,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:49:35,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:35,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-09 10:49:35,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 2178 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:37,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338864349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:37,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:37,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 106 [2021-11-09 10:49:37,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867861430] [2021-11-09 10:49:37,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-09 10:49:37,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-09 10:49:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2490, Invalid=8640, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 10:49:37,827 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 106 states, 106 states have (on average 3.2358490566037736) internal successors, (343), 106 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:39,197 INFO L93 Difference]: Finished difference Result 350 states and 352 transitions. [2021-11-09 10:49:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 10:49:39,198 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.2358490566037736) internal successors, (343), 106 states have internal predecessors, (343), 0 states have call successors, (0), 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 206 [2021-11-09 10:49:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:39,200 INFO L225 Difference]: With dead ends: 350 [2021-11-09 10:49:39,200 INFO L226 Difference]: Without dead ends: 210 [2021-11-09 10:49:39,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4349, Invalid=15391, Unknown=0, NotChecked=0, Total=19740 [2021-11-09 10:49:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-09 10:49:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-11-09 10:49:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-11-09 10:49:39,249 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2021-11-09 10:49:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:39,249 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-11-09 10:49:39,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.2358490566037736) internal successors, (343), 106 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-11-09 10:49:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-09 10:49:39,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:39,251 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:39,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:39,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:39,468 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2037207269, now seen corresponding path program 51 times [2021-11-09 10:49:39,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:39,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402836241] [2021-11-09 10:49:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:39,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3334 backedges. 0 proven. 3334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:42,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:42,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402836241] [2021-11-09 10:49:42,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402836241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:42,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745633511] [2021-11-09 10:49:42,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:49:42,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:42,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:42,025 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:42,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 10:50:06,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-11-09 10:50:06,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-09 10:50:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:08,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:50:14,647 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:50:14,647 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 58 treesize of output 37 [2021-11-09 10:50:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3334 backedges. 2145 proven. 1189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:14,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745633511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:14,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:14,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74] total 145 [2021-11-09 10:50:14,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755755156] [2021-11-09 10:50:14,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-11-09 10:50:14,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:14,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-11-09 10:50:14,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=18833, Unknown=0, NotChecked=0, Total=20880 [2021-11-09 10:50:14,733 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 145 states, 145 states have (on average 2.8482758620689657) internal successors, (413), 145 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:34,849 INFO L93 Difference]: Finished difference Result 359 states and 362 transitions. [2021-11-09 10:50:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-11-09 10:50:34,850 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.8482758620689657) internal successors, (413), 145 states have internal predecessors, (413), 0 states have call successors, (0), 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 208 [2021-11-09 10:50:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:34,851 INFO L225 Difference]: With dead ends: 359 [2021-11-09 10:50:34,851 INFO L226 Difference]: Without dead ends: 219 [2021-11-09 10:50:34,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28955 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=5912, Invalid=116938, Unknown=0, NotChecked=0, Total=122850 [2021-11-09 10:50:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-09 10:50:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2021-11-09 10:50:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-11-09 10:50:34,915 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 208 [2021-11-09 10:50:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:34,916 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-11-09 10:50:34,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.8482758620689657) internal successors, (413), 145 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-11-09 10:50:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-09 10:50:34,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:34,918 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:34,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:35,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:35,127 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash 254021209, now seen corresponding path program 52 times [2021-11-09 10:50:35,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:35,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762912469] [2021-11-09 10:50:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:35,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3537 backedges. 0 proven. 3537 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:38,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:38,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762912469] [2021-11-09 10:50:38,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762912469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:38,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105198791] [2021-11-09 10:50:38,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:50:38,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:38,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:38,377 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:38,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 10:50:52,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:50:52,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:52,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-09 10:50:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:55,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 10:51:03,258 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-09 10:51:03,258 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 58 treesize of output 37 [2021-11-09 10:51:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3537 backedges. 2278 proven. 1259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:03,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105198791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:03,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:03,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 76] total 149 [2021-11-09 10:51:03,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450630198] [2021-11-09 10:51:03,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-11-09 10:51:03,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-11-09 10:51:03,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2159, Invalid=19893, Unknown=0, NotChecked=0, Total=22052 [2021-11-09 10:51:03,373 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 149 states, 149 states have (on average 2.8523489932885906) internal successors, (425), 149 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:25,740 INFO L93 Difference]: Finished difference Result 369 states and 372 transitions. [2021-11-09 10:51:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-11-09 10:51:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.8523489932885906) internal successors, (425), 149 states have internal predecessors, (425), 0 states have call successors, (0), 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 214 [2021-11-09 10:51:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:25,743 INFO L225 Difference]: With dead ends: 369 [2021-11-09 10:51:25,743 INFO L226 Difference]: Without dead ends: 225 [2021-11-09 10:51:25,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30646 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=6207, Invalid=123753, Unknown=0, NotChecked=0, Total=129960 [2021-11-09 10:51:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-09 10:51:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 221. [2021-11-09 10:51:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-11-09 10:51:25,821 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 214 [2021-11-09 10:51:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:25,821 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-11-09 10:51:25,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.8523489932885906) internal successors, (425), 149 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-11-09 10:51:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-09 10:51:25,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:25,824 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:25,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:26,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:26,051 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1270313805, now seen corresponding path program 53 times [2021-11-09 10:51:26,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:26,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415700591] [2021-11-09 10:51:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:26,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3746 backedges. 0 proven. 3746 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:29,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:29,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415700591] [2021-11-09 10:51:29,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415700591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:29,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793254344] [2021-11-09 10:51:29,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:51:29,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:29,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:29,412 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:29,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 10:51:54,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-11-09 10:51:54,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-09 10:51:54,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:55,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 10:51:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3746 backedges. 0 proven. 3746 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:59,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793254344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:59,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:59,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76] total 113 [2021-11-09 10:51:59,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192928938] [2021-11-09 10:51:59,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-09 10:51:59,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:59,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-09 10:51:59,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=12359, Unknown=0, NotChecked=0, Total=12656 [2021-11-09 10:51:59,970 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 113 states, 113 states have (on average 3.1946902654867255) internal successors, (361), 113 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:08,848 INFO L93 Difference]: Finished difference Result 231 states and 232 transitions. [2021-11-09 10:52:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-09 10:52:08,849 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.1946902654867255) internal successors, (361), 113 states have internal predecessors, (361), 0 states have call successors, (0), 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 220 [2021-11-09 10:52:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:08,850 INFO L225 Difference]: With dead ends: 231 [2021-11-09 10:52:08,850 INFO L226 Difference]: Without dead ends: 229 [2021-11-09 10:52:08,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=568, Invalid=22384, Unknown=0, NotChecked=0, Total=22952 [2021-11-09 10:52:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-09 10:52:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2021-11-09 10:52:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-11-09 10:52:08,906 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 220 [2021-11-09 10:52:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:08,907 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-11-09 10:52:08,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.1946902654867255) internal successors, (361), 113 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-11-09 10:52:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-09 10:52:08,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:08,910 INFO L513 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:08,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:09,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 10:52:09,114 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash -101493405, now seen corresponding path program 54 times [2021-11-09 10:52:09,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:09,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725626206] [2021-11-09 10:52:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:09,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 2451 proven. 1437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:11,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:11,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725626206] [2021-11-09 10:52:11,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725626206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:11,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613771133] [2021-11-09 10:52:11,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:52:11,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:11,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:11,362 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:11,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a5d5471-03f4-469e-8005-a598e60e34b7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process