./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/heavy-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/heavy-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF --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 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:06:36,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:06:36,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:06:36,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:06:36,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:06:36,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:06:36,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:06:36,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:06:36,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:06:36,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:06:36,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:06:36,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:06:36,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:06:36,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:06:36,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:06:36,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:06:36,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:06:36,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:06:36,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:06:36,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:06:36,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:06:36,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:06:36,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:06:36,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:06:36,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:06:36,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:06:36,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:06:36,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:06:36,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:06:36,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:06:36,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:06:36,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:06:36,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:06:36,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:06:36,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:06:36,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:06:36,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:06:36,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:06:36,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:06:36,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:06:36,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:06:36,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:06:36,338 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:06:36,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:06:36,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:06:36,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:06:36,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:06:36,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:06:36,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:06:36,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:06:36,342 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:06:36,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:06:36,343 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:06:36,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:06:36,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:06:36,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:06:36,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:06:36,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:06:36,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:06:36,345 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:06:36,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:06:36,345 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:06:36,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:06:36,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:06:36,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:06:36,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:06:36,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:06:36,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:06:36,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:06:36,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:06:36,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:06:36,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:06:36,348 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:06:36,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:06:36,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:06:36,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:06:36,349 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_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a [2021-11-20 07:06:36,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:06:36,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:06:36,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:06:36,707 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:06:36,709 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:06:36,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/loops/heavy-1.c [2021-11-20 07:06:36,807 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/data/dd63f8c1c/3e5d5bf435b54a3a855c8a67b6c287d6/FLAG7cdcb61c7 [2021-11-20 07:06:37,351 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:06:37,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/sv-benchmarks/c/loops/heavy-1.c [2021-11-20 07:06:37,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/data/dd63f8c1c/3e5d5bf435b54a3a855c8a67b6c287d6/FLAG7cdcb61c7 [2021-11-20 07:06:37,708 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/data/dd63f8c1c/3e5d5bf435b54a3a855c8a67b6c287d6 [2021-11-20 07:06:37,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:06:37,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:06:37,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:06:37,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:06:37,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:06:37,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:06:37" (1/1) ... [2021-11-20 07:06:37,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cff8b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:37, skipping insertion in model container [2021-11-20 07:06:37,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:06:37" (1/1) ... [2021-11-20 07:06:37,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:06:37,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:06:38,003 WARN L230 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_9a57d503-c223-40d6-8acd-569e60caaada/sv-benchmarks/c/loops/heavy-1.c[600,613] [2021-11-20 07:06:38,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:06:38,105 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:06:38,126 WARN L230 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_9a57d503-c223-40d6-8acd-569e60caaada/sv-benchmarks/c/loops/heavy-1.c[600,613] [2021-11-20 07:06:38,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:06:38,182 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:06:38,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38 WrapperNode [2021-11-20 07:06:38,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:06:38,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:06:38,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:06:38,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:06:38,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,236 INFO L137 Inliner]: procedures = 12, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2021-11-20 07:06:38,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:06:38,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:06:38,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:06:38,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:06:38,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:06:38,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:06:38,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:06:38,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:06:38,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (1/1) ... [2021-11-20 07:06:38,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:06:38,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:38,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:06:38,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:06:38,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:06:38,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:06:38,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:06:38,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:06:38,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:06:38,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:06:38,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 07:06:38,490 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:06:38,493 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:06:38,721 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:06:38,727 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:06:38,727 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 07:06:38,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:06:38 BoogieIcfgContainer [2021-11-20 07:06:38,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:06:38,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:06:38,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:06:38,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:06:38,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:06:37" (1/3) ... [2021-11-20 07:06:38,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b00f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:06:38, skipping insertion in model container [2021-11-20 07:06:38,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:06:38" (2/3) ... [2021-11-20 07:06:38,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b00f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:06:38, skipping insertion in model container [2021-11-20 07:06:38,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:06:38" (3/3) ... [2021-11-20 07:06:38,751 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2021-11-20 07:06:38,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:06:38,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:06:38,871 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:06:38,879 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 [2021-11-20 07:06:38,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:06:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 07:06:38,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:38,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 07:06:38,904 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:38,911 INFO L85 PathProgramCache]: Analyzing trace with hash 28726599, now seen corresponding path program 1 times [2021-11-20 07:06:38,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:38,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994863079] [2021-11-20 07:06:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:38,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:06:39,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:39,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994863079] [2021-11-20 07:06:39,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994863079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:39,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:39,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:06:39,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294282444] [2021-11-20 07:06:39,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:39,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:06:39,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:06:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:06:39,138 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:39,156 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2021-11-20 07:06:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:06:39,159 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-20 07:06:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:39,169 INFO L225 Difference]: With dead ends: 26 [2021-11-20 07:06:39,170 INFO L226 Difference]: Without dead ends: 11 [2021-11-20 07:06:39,173 INFO L932 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 [2021-11-20 07:06:39,178 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:39,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:06:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-20 07:06:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-20 07:06:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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) [2021-11-20 07:06:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-20 07:06:39,226 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2021-11-20 07:06:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:39,226 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-20 07:06:39,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-20 07:06:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 07:06:39,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:39,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 07:06:39,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:06:39,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:39,235 INFO L85 PathProgramCache]: Analyzing trace with hash 28697769, now seen corresponding path program 1 times [2021-11-20 07:06:39,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:39,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951139719] [2021-11-20 07:06:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:39,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:06:39,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951139719] [2021-11-20 07:06:39,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951139719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:39,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:39,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:06:39,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080352490] [2021-11-20 07:06:39,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:39,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:06:39,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:06:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:06:39,380 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:39,424 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-20 07:06:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:06:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-20 07:06:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:39,427 INFO L225 Difference]: With dead ends: 20 [2021-11-20 07:06:39,427 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 07:06:39,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:06:39,431 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:39,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:06:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 07:06:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2021-11-20 07:06:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2021-11-20 07:06:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-20 07:06:39,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2021-11-20 07:06:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:39,447 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-20 07:06:39,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-20 07:06:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 07:06:39,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:39,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:39,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:06:39,455 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash 269702257, now seen corresponding path program 1 times [2021-11-20 07:06:39,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:39,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707432512] [2021-11-20 07:06:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:39,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:06:39,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:39,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707432512] [2021-11-20 07:06:39,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707432512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:39,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:39,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:06:39,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287566535] [2021-11-20 07:06:39,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:39,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:06:39,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:39,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:06:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:06:39,559 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-20 07:06:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:39,595 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-11-20 07:06:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:06:39,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-11-20 07:06:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:39,597 INFO L225 Difference]: With dead ends: 25 [2021-11-20 07:06:39,597 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 07:06:39,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:06:39,600 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:39,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:06:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 07:06:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-11-20 07:06:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-20 07:06:39,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-20 07:06:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:39,607 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-20 07:06:39,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-20 07:06:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-20 07:06:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:06:39,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:39,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:39,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:06:39,609 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash 904437765, now seen corresponding path program 1 times [2021-11-20 07:06:39,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:39,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475899125] [2021-11-20 07:06:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:39,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:06:39,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475899125] [2021-11-20 07:06:39,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475899125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:39,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:39,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:06:39,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204019606] [2021-11-20 07:06:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:39,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:06:39,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:06:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:06:39,660 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:39,677 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-11-20 07:06:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:06:39,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 07:06:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:39,679 INFO L225 Difference]: With dead ends: 25 [2021-11-20 07:06:39,679 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 07:06:39,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:06:39,681 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:39,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:06:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 07:06:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-20 07:06:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-11-20 07:06:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-20 07:06:39,687 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-11-20 07:06:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:39,688 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-20 07:06:39,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-20 07:06:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:06:39,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:39,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:39,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:06:39,690 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:39,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2012164797, now seen corresponding path program 1 times [2021-11-20 07:06:39,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:39,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427328167] [2021-11-20 07:06:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:39,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:06:39,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427328167] [2021-11-20 07:06:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427328167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182900649] [2021-11-20 07:06:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:39,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:39,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:39,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:39,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:06:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:39,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:06:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:06:40,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:06:40,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182900649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:40,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:06:40,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 07:06:40,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479129055] [2021-11-20 07:06:40,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:40,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:06:40,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:40,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:06:40,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:06:40,114 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) [2021-11-20 07:06:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:40,397 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2021-11-20 07:06:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:06:40,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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 13 [2021-11-20 07:06:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:40,401 INFO L225 Difference]: With dead ends: 61 [2021-11-20 07:06:40,402 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 07:06:40,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:06:40,406 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:40,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 42 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:06:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 07:06:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-20 07:06:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 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) [2021-11-20 07:06:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-11-20 07:06:40,421 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 13 [2021-11-20 07:06:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:40,422 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-11-20 07:06:40,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) [2021-11-20 07:06:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-11-20 07:06:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:06:40,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:40,425 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-20 07:06:40,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:40,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:40,640 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:40,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1327401481, now seen corresponding path program 2 times [2021-11-20 07:06:40,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:40,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725003845] [2021-11-20 07:06:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:40,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 07:06:40,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:40,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725003845] [2021-11-20 07:06:40,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725003845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:40,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572928375] [2021-11-20 07:06:40,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:06:40,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:40,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:40,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:40,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:06:40,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:06:40,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:40,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:06:40,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 07:06:41,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 87 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 07:06:41,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572928375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:41,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:06:41,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 8] total 15 [2021-11-20 07:06:41,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708945852] [2021-11-20 07:06:41,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:41,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:06:41,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:41,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:06:41,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:06:41,542 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:42,564 INFO L93 Difference]: Finished difference Result 185 states and 233 transitions. [2021-11-20 07:06:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:06:42,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-20 07:06:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:42,573 INFO L225 Difference]: With dead ends: 185 [2021-11-20 07:06:42,576 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 07:06:42,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:06:42,580 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:42,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 94 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:06:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 07:06:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-11-20 07:06:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 111 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) [2021-11-20 07:06:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-11-20 07:06:42,624 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 45 [2021-11-20 07:06:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:42,624 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-11-20 07:06:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-11-20 07:06:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:06:42,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:42,630 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-20 07:06:42,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:42,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:42,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:42,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1080136331, now seen corresponding path program 3 times [2021-11-20 07:06:42,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:42,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114150921] [2021-11-20 07:06:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:42,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 188 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-20 07:06:43,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:43,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114150921] [2021-11-20 07:06:43,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114150921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:43,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085444260] [2021-11-20 07:06:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:06:43,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:43,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:43,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:43,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:06:43,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-20 07:06:43,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:43,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:06:43,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 109 proven. 128 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-20 07:06:43,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 134 proven. 9 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-20 07:06:44,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085444260] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:44,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:06:44,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2021-11-20 07:06:44,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915211863] [2021-11-20 07:06:44,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:44,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:06:44,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:44,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:06:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:06:44,100 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:44,505 INFO L93 Difference]: Finished difference Result 226 states and 281 transitions. [2021-11-20 07:06:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:06:44,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-20 07:06:44,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:44,508 INFO L225 Difference]: With dead ends: 226 [2021-11-20 07:06:44,508 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 07:06:44,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:06:44,510 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:44,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 67 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:06:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 07:06:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-20 07:06:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 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) [2021-11-20 07:06:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2021-11-20 07:06:44,531 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 65 [2021-11-20 07:06:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:44,532 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2021-11-20 07:06:44,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2021-11-20 07:06:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 07:06:44,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:44,535 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-20 07:06:44,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 07:06:44,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:44,741 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash -380467007, now seen corresponding path program 4 times [2021-11-20 07:06:44,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:44,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939483198] [2021-11-20 07:06:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:44,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 806 proven. 121 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2021-11-20 07:06:45,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:45,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939483198] [2021-11-20 07:06:45,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939483198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:45,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785206432] [2021-11-20 07:06:45,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:06:45,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:45,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:45,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:45,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:06:45,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:06:45,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:45,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:06:45,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 0 proven. 1715 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-11-20 07:06:46,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 63 proven. 1652 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-11-20 07:06:46,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785206432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:46,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:06:46,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2021-11-20 07:06:46,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708870146] [2021-11-20 07:06:46,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:46,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 07:06:46,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 07:06:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:06:46,924 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:58,170 INFO L93 Difference]: Finished difference Result 430 states and 474 transitions. [2021-11-20 07:06:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-11-20 07:06:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-20 07:06:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:58,174 INFO L225 Difference]: With dead ends: 430 [2021-11-20 07:06:58,174 INFO L226 Difference]: Without dead ends: 316 [2021-11-20 07:06:58,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8825 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2021-11-20 07:06:58,188 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 516 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:58,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 315 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 07:06:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-20 07:06:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 306. [2021-11-20 07:06:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0688524590163935) internal successors, (326), 305 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 326 transitions. [2021-11-20 07:06:58,221 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 326 transitions. Word has length 117 [2021-11-20 07:06:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:58,222 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 326 transitions. [2021-11-20 07:06:58,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 34 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 326 transitions. [2021-11-20 07:06:58,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-20 07:06:58,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:58,229 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-20 07:06:58,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:58,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:58,456 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:58,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1199230383, now seen corresponding path program 5 times [2021-11-20 07:06:58,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:58,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209713424] [2021-11-20 07:06:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:58,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15860 backedges. 2846 proven. 144 refuted. 0 times theorem prover too weak. 12870 trivial. 0 not checked. [2021-11-20 07:06:59,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:59,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209713424] [2021-11-20 07:06:59,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209713424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:59,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636489809] [2021-11-20 07:06:59,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:06:59,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:59,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:59,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:59,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a57d503-c223-40d6-8acd-569e60caaada/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process