./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa --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 e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:54:24,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:54:24,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:54:24,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:54:24,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:54:24,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:54:24,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:54:24,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:54:24,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:54:24,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:54:24,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:54:24,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:54:24,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:54:24,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:54:24,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:54:24,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:54:24,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:54:24,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:54:24,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:54:24,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:54:24,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:54:24,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:54:24,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:54:24,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:54:24,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:54:24,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:54:24,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:54:24,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:54:24,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:54:24,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:54:24,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:54:24,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:54:24,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:54:24,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:54:24,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:54:24,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:54:24,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:54:24,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:54:24,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:54:24,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:54:24,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:54:24,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:54:24,431 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:54:24,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:54:24,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:54:24,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:54:24,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:54:24,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:54:24,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:54:24,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:54:24,434 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:54:24,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:54:24,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:54:24,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:54:24,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:54:24,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:54:24,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:54:24,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:54:24,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:54:24,435 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:54:24,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:54:24,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:54:24,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:54:24,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:54:24,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:54:24,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:54:24,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:54:24,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:54:24,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:54:24,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:54:24,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:54:24,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:54:24,441 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:54:24,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:54:24,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:54:24,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:54:24,441 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_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2021-12-06 19:54:24,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:54:24,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:54:24,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:54:24,629 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:54:24,630 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:54:24,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/pnr3.c [2021-12-06 19:54:24,672 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/data/e98a9c4c8/c81976e3ab054bb7ad556c472a020429/FLAGb99b754b4 [2021-12-06 19:54:25,031 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:54:25,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/sv-benchmarks/c/array-tiling/pnr3.c [2021-12-06 19:54:25,036 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/data/e98a9c4c8/c81976e3ab054bb7ad556c472a020429/FLAGb99b754b4 [2021-12-06 19:54:25,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/data/e98a9c4c8/c81976e3ab054bb7ad556c472a020429 [2021-12-06 19:54:25,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:54:25,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:54:25,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:54:25,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:54:25,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:54:25,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16cc5a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25, skipping insertion in model container [2021-12-06 19:54:25,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:54:25,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:54:25,193 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_813a61dd-1911-4029-91b9-448929446828/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2021-12-06 19:54:25,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:54:25,213 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:54:25,223 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_813a61dd-1911-4029-91b9-448929446828/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2021-12-06 19:54:25,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:54:25,240 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:54:25,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25 WrapperNode [2021-12-06 19:54:25,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:54:25,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:54:25,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:54:25,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:54:25,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,268 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2021-12-06 19:54:25,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:54:25,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:54:25,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:54:25,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:54:25,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:54:25,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:54:25,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:54:25,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:54:25,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (1/1) ... [2021-12-06 19:54:25,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:54:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:25,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:54:25,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:54:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:54:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:54:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:54:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:54:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-06 19:54:25,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-06 19:54:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:54:25,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:54:25,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:54:25,405 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:54:25,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:54:25,515 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:54:25,520 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:54:25,521 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:54:25,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:54:25 BoogieIcfgContainer [2021-12-06 19:54:25,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:54:25,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:54:25,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:54:25,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:54:25,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:54:25" (1/3) ... [2021-12-06 19:54:25,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74656943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:54:25, skipping insertion in model container [2021-12-06 19:54:25,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:54:25" (2/3) ... [2021-12-06 19:54:25,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74656943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:54:25, skipping insertion in model container [2021-12-06 19:54:25,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:54:25" (3/3) ... [2021-12-06 19:54:25,529 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2021-12-06 19:54:25,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:54:25,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:54:25,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:54:25,575 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 [2021-12-06 19:54:25,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:54:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:54:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:54:25,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:25,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:25,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1781049194, now seen corresponding path program 1 times [2021-12-06 19:54:25,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:25,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601455352] [2021-12-06 19:54:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:25,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:54:25,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:25,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601455352] [2021-12-06 19:54:25,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601455352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:54:25,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:54:25,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:54:25,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269587205] [2021-12-06 19:54:25,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:54:25,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:54:25,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:54:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:54:25,757 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-06 19:54:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:25,771 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-12-06 19:54:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:54:25,773 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-12-06 19:54:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:25,778 INFO L225 Difference]: With dead ends: 57 [2021-12-06 19:54:25,778 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 19:54:25,780 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 [2021-12-06 19:54:25,783 INFO L933 BasicCegarLoop]: 39 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, 39 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 [2021-12-06 19:54:25,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:54:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 19:54:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-06 19:54:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:54:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-06 19:54:25,810 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2021-12-06 19:54:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:25,811 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-06 19:54:25,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-06 19:54:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-06 19:54:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:54:25,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:25,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:25,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:54:25,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1807831303, now seen corresponding path program 1 times [2021-12-06 19:54:25,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:25,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487133055] [2021-12-06 19:54:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:25,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:54:25,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487133055] [2021-12-06 19:54:25,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487133055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:54:25,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:54:25,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:54:25,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245855154] [2021-12-06 19:54:25,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:54:25,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:54:25,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:25,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:54:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:54:25,959 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-06 19:54:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:26,021 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-06 19:54:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:54:26,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2021-12-06 19:54:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:26,023 INFO L225 Difference]: With dead ends: 45 [2021-12-06 19:54:26,023 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 19:54:26,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:54:26,024 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:26,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:54:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 19:54:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-12-06 19:54:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 19:54:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-06 19:54:26,032 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-12-06 19:54:26,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:26,032 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-06 19:54:26,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-06 19:54:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-06 19:54:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 19:54:26,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:26,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:26,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:54:26,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1367310263, now seen corresponding path program 1 times [2021-12-06 19:54:26,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:26,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877481020] [2021-12-06 19:54:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:26,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:26,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:26,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:26,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:26,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:26,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877481020] [2021-12-06 19:54:26,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877481020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:26,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95313961] [2021-12-06 19:54:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:26,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:26,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:26,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:26,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:54:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:54:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:26,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:26,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:54:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:26,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2021-12-06 19:54:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:26,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:26,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 19:54:26,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 19:54:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:26,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95313961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:26,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:26,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2021-12-06 19:54:26,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828622453] [2021-12-06 19:54:26,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:26,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:54:26,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:26,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:54:26,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:54:26,618 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:54:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:26,804 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2021-12-06 19:54:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:54:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2021-12-06 19:54:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:26,806 INFO L225 Difference]: With dead ends: 84 [2021-12-06 19:54:26,806 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 19:54:26,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:54:26,807 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:26,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 181 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:54:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 19:54:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2021-12-06 19:54:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 19:54:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-12-06 19:54:26,816 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 31 [2021-12-06 19:54:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:26,817 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-12-06 19:54:26,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:54:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-12-06 19:54:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 19:54:26,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:26,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:26,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:54:27,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:27,020 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:27,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1238713291, now seen corresponding path program 1 times [2021-12-06 19:54:27,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:27,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361617849] [2021-12-06 19:54:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:27,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:27,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:27,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:27,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:27,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:27,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361617849] [2021-12-06 19:54:27,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361617849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:27,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167725828] [2021-12-06 19:54:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:27,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:27,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:27,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:27,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:54:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:54:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:27,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:27,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:27,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:54:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:27,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:54:27,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:54:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:54:27,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:28,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 19:54:28,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 19:54:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:28,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167725828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:28,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:28,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-06 19:54:28,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055575113] [2021-12-06 19:54:28,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:28,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:54:28,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:54:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:54:28,276 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 19:54:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:28,777 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2021-12-06 19:54:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 19:54:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2021-12-06 19:54:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:28,780 INFO L225 Difference]: With dead ends: 137 [2021-12-06 19:54:28,780 INFO L226 Difference]: Without dead ends: 135 [2021-12-06 19:54:28,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 19:54:28,782 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 194 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:28,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 409 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 385 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2021-12-06 19:54:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-06 19:54:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2021-12-06 19:54:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:54:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2021-12-06 19:54:28,794 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 31 [2021-12-06 19:54:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:28,794 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2021-12-06 19:54:28,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 19:54:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2021-12-06 19:54:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 19:54:28,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:28,796 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:28,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:54:28,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:28,998 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2026411713, now seen corresponding path program 1 times [2021-12-06 19:54:29,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:29,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330448214] [2021-12-06 19:54:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:29,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:29,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:29,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330448214] [2021-12-06 19:54:29,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330448214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426296091] [2021-12-06 19:54:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:29,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:29,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:29,238 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:29,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:54:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:29,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:54:29,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:29,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:29,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2021-12-06 19:54:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:29,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:29,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:54:29,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:54:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:29,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426296091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:29,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:29,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-06 19:54:29,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589674425] [2021-12-06 19:54:29,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:29,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:54:29,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:54:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:54:29,498 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:54:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:29,720 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2021-12-06 19:54:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:54:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-12-06 19:54:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:29,722 INFO L225 Difference]: With dead ends: 202 [2021-12-06 19:54:29,722 INFO L226 Difference]: Without dead ends: 200 [2021-12-06 19:54:29,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:54:29,724 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 83 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:29,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:54:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-06 19:54:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 105. [2021-12-06 19:54:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.35) internal successors, (108), 82 states have internal predecessors, (108), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 19:54:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2021-12-06 19:54:29,742 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 35 [2021-12-06 19:54:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:29,742 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2021-12-06 19:54:29,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 19:54:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2021-12-06 19:54:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 19:54:29,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:29,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:29,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:54:29,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:29,946 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash 680207681, now seen corresponding path program 1 times [2021-12-06 19:54:29,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:29,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799155699] [2021-12-06 19:54:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:29,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:30,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:30,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:30,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:30,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:30,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799155699] [2021-12-06 19:54:30,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799155699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969649166] [2021-12-06 19:54:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:30,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:30,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:30,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:54:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:30,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:54:30,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:30,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:30,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:54:30,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:54:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:54:30,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:30,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:54:30,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:54:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:30,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969649166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:30,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:30,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-12-06 19:54:30,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101837621] [2021-12-06 19:54:30,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:30,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:54:30,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:54:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:54:30,575 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 19:54:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:31,141 INFO L93 Difference]: Finished difference Result 318 states and 449 transitions. [2021-12-06 19:54:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 19:54:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2021-12-06 19:54:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:31,144 INFO L225 Difference]: With dead ends: 318 [2021-12-06 19:54:31,145 INFO L226 Difference]: Without dead ends: 316 [2021-12-06 19:54:31,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 19:54:31,147 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 175 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:31,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 450 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 482 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2021-12-06 19:54:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-06 19:54:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 148. [2021-12-06 19:54:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 113 states have internal predecessors, (151), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 19:54:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2021-12-06 19:54:31,172 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 35 [2021-12-06 19:54:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:31,173 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2021-12-06 19:54:31,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-06 19:54:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2021-12-06 19:54:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 19:54:31,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:31,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:31,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:54:31,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 19:54:31,376 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash -406526155, now seen corresponding path program 2 times [2021-12-06 19:54:31,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:31,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260815179] [2021-12-06 19:54:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:31,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:31,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:31,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:31,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:31,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:31,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260815179] [2021-12-06 19:54:31,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260815179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:31,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281546580] [2021-12-06 19:54:31,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:54:31,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:31,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:31,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:31,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:54:31,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:54:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:54:31,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 19:54:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:31,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:54:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:31,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:31,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:54:31,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:54:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:31,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281546580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:31,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:31,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-06 19:54:31,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994214005] [2021-12-06 19:54:31,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:31,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:54:31,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:54:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:54:31,687 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:54:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:32,009 INFO L93 Difference]: Finished difference Result 629 states and 954 transitions. [2021-12-06 19:54:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 19:54:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-12-06 19:54:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:32,014 INFO L225 Difference]: With dead ends: 629 [2021-12-06 19:54:32,014 INFO L226 Difference]: Without dead ends: 627 [2021-12-06 19:54:32,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:54:32,015 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 65 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:32,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 314 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:54:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-12-06 19:54:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2021-12-06 19:54:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-06 19:54:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 518 transitions. [2021-12-06 19:54:32,051 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 518 transitions. Word has length 39 [2021-12-06 19:54:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:32,051 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 518 transitions. [2021-12-06 19:54:32,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 19:54:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 518 transitions. [2021-12-06 19:54:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 19:54:32,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:32,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:32,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:54:32,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:32,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:32,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1686389833, now seen corresponding path program 1 times [2021-12-06 19:54:32,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:32,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966633603] [2021-12-06 19:54:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:32,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:32,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:32,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:32,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:32,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:32,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966633603] [2021-12-06 19:54:32,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966633603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:32,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694029012] [2021-12-06 19:54:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:32,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:32,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:32,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:54:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:32,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:54:32,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:32,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:54:32,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:54:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:32,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:32,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:54:32,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:54:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:32,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694029012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:32,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:32,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-06 19:54:32,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196537003] [2021-12-06 19:54:32,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:32,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:54:32,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:54:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:54:32,734 INFO L87 Difference]: Start difference. First operand 337 states and 518 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 19:54:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:33,894 INFO L93 Difference]: Finished difference Result 1027 states and 1566 transitions. [2021-12-06 19:54:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 19:54:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 39 [2021-12-06 19:54:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:33,900 INFO L225 Difference]: With dead ends: 1027 [2021-12-06 19:54:33,900 INFO L226 Difference]: Without dead ends: 1025 [2021-12-06 19:54:33,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 19:54:33,902 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 214 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:33,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 526 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:54:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-12-06 19:54:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 160. [2021-12-06 19:54:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 125 states have internal predecessors, (165), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 19:54:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2021-12-06 19:54:33,930 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 39 [2021-12-06 19:54:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:33,931 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2021-12-06 19:54:33,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 19:54:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2021-12-06 19:54:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 19:54:33,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:33,932 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:33,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:54:34,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:34,134 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash 685144619, now seen corresponding path program 3 times [2021-12-06 19:54:34,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:34,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119356856] [2021-12-06 19:54:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:34,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:34,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:34,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:34,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:34,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119356856] [2021-12-06 19:54:34,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119356856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:34,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712301824] [2021-12-06 19:54:34,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:54:34,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:34,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:34,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:34,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:54:34,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:54:34,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:54:34,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 19:54:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:34,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:54:34,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712301824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:34,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:34,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2021-12-06 19:54:34,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116126943] [2021-12-06 19:54:34,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:34,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:54:34,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:54:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:54:34,783 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 19:54:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:35,007 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2021-12-06 19:54:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:54:35,008 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2021-12-06 19:54:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:35,010 INFO L225 Difference]: With dead ends: 267 [2021-12-06 19:54:35,010 INFO L226 Difference]: Without dead ends: 247 [2021-12-06 19:54:35,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:54:35,012 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 269 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:35,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 123 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:54:35,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-06 19:54:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2021-12-06 19:54:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-06 19:54:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2021-12-06 19:54:35,032 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 43 [2021-12-06 19:54:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:35,032 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2021-12-06 19:54:35,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 19:54:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2021-12-06 19:54:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:54:35,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:35,034 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:35,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:54:35,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 19:54:35,235 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:35,236 INFO L85 PathProgramCache]: Analyzing trace with hash 466828189, now seen corresponding path program 2 times [2021-12-06 19:54:35,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:35,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624358660] [2021-12-06 19:54:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:35,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:35,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:35,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:35,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:35,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:54:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:35,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:54:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:35,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:54:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:35,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:35,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624358660] [2021-12-06 19:54:35,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624358660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:35,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931966199] [2021-12-06 19:54:35,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:54:35,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:35,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:35,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:35,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:54:35,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:54:35,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:54:35,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:54:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:35,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:35,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:35,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:54:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:35,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:54:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:35,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:54:35,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:35,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:54:35,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:35,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:54:35,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:54:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:54:35,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:37,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931966199] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:37,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:54:37,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-12-06 19:54:37,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691776355] [2021-12-06 19:54:37,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:37,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:54:37,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:54:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-12-06 19:54:37,026 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-06 19:54:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:37,607 INFO L93 Difference]: Finished difference Result 242 states and 338 transitions. [2021-12-06 19:54:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:54:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2021-12-06 19:54:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:37,609 INFO L225 Difference]: With dead ends: 242 [2021-12-06 19:54:37,609 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 19:54:37,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=281, Invalid=1358, Unknown=1, NotChecked=0, Total=1640 [2021-12-06 19:54:37,610 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 166 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:37,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 363 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 500 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2021-12-06 19:54:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 19:54:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 141. [2021-12-06 19:54:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-06 19:54:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2021-12-06 19:54:37,626 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 51 [2021-12-06 19:54:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:37,627 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2021-12-06 19:54:37,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-06 19:54:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2021-12-06 19:54:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 19:54:37,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:37,628 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:37,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:54:37,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:54:37,830 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1257132653, now seen corresponding path program 2 times [2021-12-06 19:54:37,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:37,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829013623] [2021-12-06 19:54:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:37,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:38,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:38,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:38,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:54:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:38,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:54:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:38,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:54:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:38,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:38,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829013623] [2021-12-06 19:54:38,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829013623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:38,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887763617] [2021-12-06 19:54:38,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:54:38,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:38,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:38,025 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:38,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:54:38,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:54:38,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:54:38,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 19:54:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:38,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:38,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:54:38,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:38,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:54:38,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:38,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:54:38,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:54:38,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:54:38,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:54:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:54:38,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887763617] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:39,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:54:39,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-06 19:54:39,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447307999] [2021-12-06 19:54:39,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:54:39,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:39,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:54:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=346, Unknown=1, NotChecked=0, Total=420 [2021-12-06 19:54:39,018 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-06 19:54:39,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:39,425 INFO L93 Difference]: Finished difference Result 286 states and 389 transitions. [2021-12-06 19:54:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 19:54:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 55 [2021-12-06 19:54:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:39,427 INFO L225 Difference]: With dead ends: 286 [2021-12-06 19:54:39,427 INFO L226 Difference]: Without dead ends: 284 [2021-12-06 19:54:39,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=1366, Unknown=1, NotChecked=0, Total=1640 [2021-12-06 19:54:39,429 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 116 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:39,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 457 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 487 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2021-12-06 19:54:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-06 19:54:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 177. [2021-12-06 19:54:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.3208955223880596) internal successors, (177), 136 states have internal predecessors, (177), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-06 19:54:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 247 transitions. [2021-12-06 19:54:39,448 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 247 transitions. Word has length 55 [2021-12-06 19:54:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:39,449 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 247 transitions. [2021-12-06 19:54:39,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-06 19:54:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 247 transitions. [2021-12-06 19:54:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 19:54:39,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:39,450 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:39,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:54:39,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:54:39,652 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1929317243, now seen corresponding path program 4 times [2021-12-06 19:54:39,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:39,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779102216] [2021-12-06 19:54:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:39,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:39,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:39,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:39,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:39,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:54:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:39,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:54:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:54:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:39,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:39,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779102216] [2021-12-06 19:54:39,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779102216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:39,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387099715] [2021-12-06 19:54:39,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:54:39,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:39,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:39,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:54:39,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:54:39,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:54:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 19:54:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:39,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:39,957 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:54:39,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:54:39,984 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:54:39,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:54:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:40,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:40,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:54:40,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:54:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:40,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387099715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:40,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:40,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-12-06 19:54:40,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447423365] [2021-12-06 19:54:40,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:40,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:54:40,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:54:40,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:54:40,215 INFO L87 Difference]: Start difference. First operand 177 states and 247 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-06 19:54:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:41,830 INFO L93 Difference]: Finished difference Result 1573 states and 2437 transitions. [2021-12-06 19:54:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 19:54:41,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 63 [2021-12-06 19:54:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:41,841 INFO L225 Difference]: With dead ends: 1573 [2021-12-06 19:54:41,842 INFO L226 Difference]: Without dead ends: 1571 [2021-12-06 19:54:41,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=682, Invalid=3874, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 19:54:41,845 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 247 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:41,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 885 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 19:54:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-12-06 19:54:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 313. [2021-12-06 19:54:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 238 states have (on average 1.3781512605042017) internal successors, (328), 238 states have internal predecessors, (328), 67 states have call successors, (67), 7 states have call predecessors, (67), 7 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2021-12-06 19:54:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 462 transitions. [2021-12-06 19:54:41,901 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 462 transitions. Word has length 63 [2021-12-06 19:54:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:41,902 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 462 transitions. [2021-12-06 19:54:41,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-06 19:54:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 462 transitions. [2021-12-06 19:54:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 19:54:41,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:41,904 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:41,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:54:42,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:54:42,105 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1664050179, now seen corresponding path program 1 times [2021-12-06 19:54:42,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:42,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913764868] [2021-12-06 19:54:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:42,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:42,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:42,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:42,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:54:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:42,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:54:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:42,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:54:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:42,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913764868] [2021-12-06 19:54:42,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913764868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961463686] [2021-12-06 19:54:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:42,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:42,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:42,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:54:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:54:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:42,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:42,505 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:54:42,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:54:42,554 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:54:42,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:54:42,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:54:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:54:42,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:43,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:54:43,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:54:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961463686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:43,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:43,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2021-12-06 19:54:43,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128789357] [2021-12-06 19:54:43,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:54:43,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:54:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:54:43,506 INFO L87 Difference]: Start difference. First operand 313 states and 462 transitions. Second operand has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-06 19:54:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:49,718 INFO L93 Difference]: Finished difference Result 1157 states and 1734 transitions. [2021-12-06 19:54:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 19:54:49,719 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 63 [2021-12-06 19:54:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:49,724 INFO L225 Difference]: With dead ends: 1157 [2021-12-06 19:54:49,724 INFO L226 Difference]: Without dead ends: 1155 [2021-12-06 19:54:49,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=789, Invalid=6015, Unknown=2, NotChecked=0, Total=6806 [2021-12-06 19:54:49,728 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 394 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:49,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 1042 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 2070 Invalid, 0 Unknown, 195 Unchecked, 1.0s Time] [2021-12-06 19:54:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-12-06 19:54:49,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 385. [2021-12-06 19:54:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 290 states have (on average 1.393103448275862) internal successors, (404), 290 states have internal predecessors, (404), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2021-12-06 19:54:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 574 transitions. [2021-12-06 19:54:49,784 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 574 transitions. Word has length 63 [2021-12-06 19:54:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:49,785 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 574 transitions. [2021-12-06 19:54:49,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-06 19:54:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 574 transitions. [2021-12-06 19:54:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:54:49,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:49,786 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:49,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:54:49,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:54:49,987 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:49,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:49,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2043081871, now seen corresponding path program 5 times [2021-12-06 19:54:49,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836716333] [2021-12-06 19:54:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:49,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:50,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:50,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:50,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:50,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:54:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:50,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:54:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:50,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:54:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:50,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:50,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836716333] [2021-12-06 19:54:50,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836716333] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:50,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192295849] [2021-12-06 19:54:50,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:54:50,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:50,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:50,117 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:50,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:54:50,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 19:54:50,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:54:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 19:54:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:50,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:50,275 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:54:50,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:54:50,389 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 19:54:50,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 19:54:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:50,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:54:50,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:54:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:50,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192295849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:50,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:50,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2021-12-06 19:54:50,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175692724] [2021-12-06 19:54:50,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:50,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:54:50,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:50,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:54:50,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:54:50,537 INFO L87 Difference]: Start difference. First operand 385 states and 574 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:54:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:54:52,646 INFO L93 Difference]: Finished difference Result 3970 states and 6264 transitions. [2021-12-06 19:54:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 19:54:52,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2021-12-06 19:54:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:54:52,665 INFO L225 Difference]: With dead ends: 3970 [2021-12-06 19:54:52,666 INFO L226 Difference]: Without dead ends: 3968 [2021-12-06 19:54:52,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=721, Invalid=5441, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 19:54:52,671 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 187 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:54:52,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1129 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 19:54:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2021-12-06 19:54:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 773. [2021-12-06 19:54:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 578 states have (on average 1.42560553633218) internal successors, (824), 578 states have internal predecessors, (824), 185 states have call successors, (185), 9 states have call predecessors, (185), 9 states have return successors, (185), 185 states have call predecessors, (185), 185 states have call successors, (185) [2021-12-06 19:54:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1194 transitions. [2021-12-06 19:54:52,831 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1194 transitions. Word has length 67 [2021-12-06 19:54:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:54:52,831 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1194 transitions. [2021-12-06 19:54:52,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 19:54:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1194 transitions. [2021-12-06 19:54:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:54:52,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:54:52,833 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:54:52,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:54:53,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:53,034 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:54:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:54:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -656878477, now seen corresponding path program 1 times [2021-12-06 19:54:53,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:54:53,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535274132] [2021-12-06 19:54:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:53,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:54:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:53,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:54:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:53,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:54:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:53,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:54:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:53,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:54:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:53,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:54:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:53,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:54:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:53,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:54:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535274132] [2021-12-06 19:54:53,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535274132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:54:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780212226] [2021-12-06 19:54:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:54:53,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:54:53,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:54:53,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:54:53,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:54:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:54:53,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:54:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:54:53,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:54:53,429 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:54:53,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:54:53,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:54:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 19:54:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:54:55,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:54:55,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:54:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:54:55,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780212226] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:54:55,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:54:55,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-06 19:54:55,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453391048] [2021-12-06 19:54:55,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:54:55,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:54:55,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:54:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:54:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=938, Unknown=1, NotChecked=0, Total=1056 [2021-12-06 19:54:55,832 INFO L87 Difference]: Start difference. First operand 773 states and 1194 transitions. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-06 19:55:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:15,307 INFO L93 Difference]: Finished difference Result 3491 states and 5420 transitions. [2021-12-06 19:55:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 19:55:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 67 [2021-12-06 19:55:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:15,323 INFO L225 Difference]: With dead ends: 3491 [2021-12-06 19:55:15,323 INFO L226 Difference]: Without dead ends: 3489 [2021-12-06 19:55:15,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4540 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=1542, Invalid=11559, Unknown=9, NotChecked=0, Total=13110 [2021-12-06 19:55:15,329 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 587 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 3242 mSolverCounterSat, 989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 4504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 989 IncrementalHoareTripleChecker+Valid, 3242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 1736 Invalid, 4504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [989 Valid, 3242 Invalid, 0 Unknown, 273 Unchecked, 1.6s Time] [2021-12-06 19:55:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2021-12-06 19:55:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 863. [2021-12-06 19:55:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 642 states have (on average 1.4236760124610592) internal successors, (914), 642 states have internal predecessors, (914), 205 states have call successors, (205), 15 states have call predecessors, (205), 15 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2021-12-06 19:55:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1324 transitions. [2021-12-06 19:55:15,490 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1324 transitions. Word has length 67 [2021-12-06 19:55:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:15,490 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1324 transitions. [2021-12-06 19:55:15,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-06 19:55:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1324 transitions. [2021-12-06 19:55:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 19:55:15,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:15,492 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:15,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 19:55:15,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:55:15,694 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1810243687, now seen corresponding path program 6 times [2021-12-06 19:55:15,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:55:15,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534887050] [2021-12-06 19:55:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:15,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:55:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:15,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:55:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:55:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:15,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:55:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:15,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:55:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:15,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:55:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:15,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:55:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:15,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:55:15,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534887050] [2021-12-06 19:55:15,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534887050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:55:15,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256739818] [2021-12-06 19:55:15,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:55:15,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:55:15,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:55:15,850 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:55:15,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:55:15,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 19:55:15,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:55:15,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 19:55:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:55:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:16,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:16,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 19:55:16,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 19:55:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:16,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256739818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:16,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:55:16,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-12-06 19:55:16,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564523608] [2021-12-06 19:55:16,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:16,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:55:16,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:55:16,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:55:16,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:55:16,293 INFO L87 Difference]: Start difference. First operand 863 states and 1324 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:55:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:26,800 INFO L93 Difference]: Finished difference Result 22209 states and 34751 transitions. [2021-12-06 19:55:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2021-12-06 19:55:26,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2021-12-06 19:55:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:26,879 INFO L225 Difference]: With dead ends: 22209 [2021-12-06 19:55:26,879 INFO L226 Difference]: Without dead ends: 22207 [2021-12-06 19:55:26,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30922 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5936, Invalid=64554, Unknown=0, NotChecked=0, Total=70490 [2021-12-06 19:55:26,893 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 568 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 7979 mSolverCounterSat, 2468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 3234 SdHoareTripleChecker+Invalid, 10447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2468 IncrementalHoareTripleChecker+Valid, 7979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:26,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 3234 Invalid, 10447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2468 Valid, 7979 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-06 19:55:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22207 states. [2021-12-06 19:55:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22207 to 2233. [2021-12-06 19:55:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 1648 states have (on average 1.454490291262136) internal successors, (2397), 1648 states have internal predecessors, (2397), 569 states have call successors, (569), 15 states have call predecessors, (569), 15 states have return successors, (569), 569 states have call predecessors, (569), 569 states have call successors, (569) [2021-12-06 19:55:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 3535 transitions. [2021-12-06 19:55:27,644 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 3535 transitions. Word has length 71 [2021-12-06 19:55:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:27,645 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 3535 transitions. [2021-12-06 19:55:27,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:55:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 3535 transitions. [2021-12-06 19:55:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 19:55:27,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:27,648 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:27,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:55:27,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:55:27,849 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:27,849 INFO L85 PathProgramCache]: Analyzing trace with hash -561495575, now seen corresponding path program 1 times [2021-12-06 19:55:27,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:55:27,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417790954] [2021-12-06 19:55:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:27,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:55:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:27,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:55:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:55:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:27,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:55:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:27,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:55:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:27,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:55:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:55:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:27,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:55:27,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417790954] [2021-12-06 19:55:27,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417790954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:55:27,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715044695] [2021-12-06 19:55:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:27,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:55:27,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:55:27,986 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:55:27,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:55:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:55:28,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:55:28,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:55:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:28,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:28,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:55:28,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:55:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:28,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715044695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:28,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:55:28,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2021-12-06 19:55:28,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794589452] [2021-12-06 19:55:28,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:28,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 19:55:28,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:55:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 19:55:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 19:55:28,604 INFO L87 Difference]: Start difference. First operand 2233 states and 3535 transitions. Second operand has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 35 states have internal predecessors, (136), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-06 19:55:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:44,223 INFO L93 Difference]: Finished difference Result 22138 states and 35235 transitions. [2021-12-06 19:55:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-12-06 19:55:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 35 states have internal predecessors, (136), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 71 [2021-12-06 19:55:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:44,268 INFO L225 Difference]: With dead ends: 22138 [2021-12-06 19:55:44,269 INFO L226 Difference]: Without dead ends: 22136 [2021-12-06 19:55:44,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38758 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10685, Invalid=78417, Unknown=0, NotChecked=0, Total=89102 [2021-12-06 19:55:44,278 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 1066 mSDsluCounter, 2797 mSDsCounter, 0 mSdLazyCounter, 9634 mSolverCounterSat, 4125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 13759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4125 IncrementalHoareTripleChecker+Valid, 9634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:44,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 3271 Invalid, 13759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4125 Valid, 9634 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-06 19:55:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22136 states. [2021-12-06 19:55:44,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22136 to 905. [2021-12-06 19:55:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 684 states have (on average 1.402046783625731) internal successors, (959), 684 states have internal predecessors, (959), 205 states have call successors, (205), 15 states have call predecessors, (205), 15 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2021-12-06 19:55:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1369 transitions. [2021-12-06 19:55:44,905 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1369 transitions. Word has length 71 [2021-12-06 19:55:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:44,906 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1369 transitions. [2021-12-06 19:55:44,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 35 states have internal predecessors, (136), 6 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-06 19:55:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1369 transitions. [2021-12-06 19:55:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:55:44,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:44,908 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:44,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:55:45,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:55:45,109 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:45,110 INFO L85 PathProgramCache]: Analyzing trace with hash -424463901, now seen corresponding path program 2 times [2021-12-06 19:55:45,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:55:45,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474654409] [2021-12-06 19:55:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:45,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:55:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:55:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:55:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:55:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:55:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:55:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:55:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:55:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 19:55:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 19:55:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:55:45,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:55:45,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474654409] [2021-12-06 19:55:45,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474654409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:55:45,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759707554] [2021-12-06 19:55:45,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:55:45,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:55:45,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:55:45,438 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:55:45,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:55:45,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:55:45,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:55:45,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:55:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:45,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:55:45,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:55:45,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:55:45,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:55:45,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:55:45,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:55:45,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:55:45,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:55:45,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:55:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:55:45,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:55:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:55:45,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:55:45,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:55:45,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 19:55:45,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:55:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:55:46,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:46,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759707554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:55:46,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:55:46,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-06 19:55:46,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607588749] [2021-12-06 19:55:46,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:46,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:55:46,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:55:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:55:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2021-12-06 19:55:46,639 INFO L87 Difference]: Start difference. First operand 905 states and 1369 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-06 19:55:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:47,477 INFO L93 Difference]: Finished difference Result 997 states and 1461 transitions. [2021-12-06 19:55:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 19:55:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 75 [2021-12-06 19:55:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:47,480 INFO L225 Difference]: With dead ends: 997 [2021-12-06 19:55:47,480 INFO L226 Difference]: Without dead ends: 995 [2021-12-06 19:55:47,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 96 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=1657, Unknown=1, NotChecked=0, Total=1980 [2021-12-06 19:55:47,481 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 130 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:47,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 446 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 609 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2021-12-06 19:55:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-12-06 19:55:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 643. [2021-12-06 19:55:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 486 states have (on average 1.3847736625514404) internal successors, (673), 486 states have internal predecessors, (673), 141 states have call successors, (141), 15 states have call predecessors, (141), 15 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2021-12-06 19:55:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 955 transitions. [2021-12-06 19:55:47,661 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 955 transitions. Word has length 75 [2021-12-06 19:55:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:47,662 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 955 transitions. [2021-12-06 19:55:47,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-06 19:55:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 955 transitions. [2021-12-06 19:55:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:55:47,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:47,663 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:47,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:55:47,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:55:47,865 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash -629945763, now seen corresponding path program 7 times [2021-12-06 19:55:47,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:55:47,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548678335] [2021-12-06 19:55:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:47,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:55:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:48,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:55:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:48,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:55:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:48,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:55:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:48,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:55:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:48,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:55:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:48,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:55:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:48,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:55:48,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548678335] [2021-12-06 19:55:48,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548678335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:55:48,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628811479] [2021-12-06 19:55:48,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:55:48,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:55:48,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:55:48,117 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:55:48,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:55:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:48,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 19:55:48,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:48,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 19:55:48,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628811479] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:48,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:55:48,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2021-12-06 19:55:48,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817407239] [2021-12-06 19:55:48,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:48,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 19:55:48,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:55:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 19:55:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 19:55:48,932 INFO L87 Difference]: Start difference. First operand 643 states and 955 transitions. Second operand has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-06 19:55:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:49,399 INFO L93 Difference]: Finished difference Result 741 states and 1092 transitions. [2021-12-06 19:55:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:55:49,400 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 75 [2021-12-06 19:55:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:49,401 INFO L225 Difference]: With dead ends: 741 [2021-12-06 19:55:49,401 INFO L226 Difference]: Without dead ends: 709 [2021-12-06 19:55:49,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 19:55:49,402 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 262 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:49,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 180 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:55:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-12-06 19:55:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 658. [2021-12-06 19:55:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 498 states have (on average 1.3634538152610443) internal successors, (679), 498 states have internal predecessors, (679), 144 states have call successors, (144), 15 states have call predecessors, (144), 15 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2021-12-06 19:55:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 967 transitions. [2021-12-06 19:55:49,597 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 967 transitions. Word has length 75 [2021-12-06 19:55:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:49,598 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 967 transitions. [2021-12-06 19:55:49,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-06 19:55:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 967 transitions. [2021-12-06 19:55:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:55:49,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:49,600 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:49,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:55:49,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:55:49,800 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:55:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:49,801 INFO L85 PathProgramCache]: Analyzing trace with hash 159587245, now seen corresponding path program 8 times [2021-12-06 19:55:49,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:55:49,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347891031] [2021-12-06 19:55:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:55:49,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:55:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:55:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:55:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:55:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:55:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:55:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:55:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:55:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 19:55:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 19:55:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:55:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:55:49,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:55:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347891031] [2021-12-06 19:55:49,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347891031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:55:49,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199642763] [2021-12-06 19:55:49,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:55:49,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:55:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:55:49,933 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:55:49,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:55:49,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:55:49,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:55:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 19:55:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:50,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:55:50,085 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:55:50,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:55:50,109 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:55:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-06 19:55:50,279 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 19:55:50,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-06 19:55:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:55:50,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:50,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:55:50,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 19:55:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:55:50,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199642763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:50,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:55:50,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2021-12-06 19:55:50,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101295395] [2021-12-06 19:55:50,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:50,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:55:50,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:55:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:55:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:55:50,457 INFO L87 Difference]: Start difference. First operand 658 states and 967 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-06 19:56:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:56:07,895 INFO L93 Difference]: Finished difference Result 21321 states and 34054 transitions. [2021-12-06 19:56:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-12-06 19:56:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 95 [2021-12-06 19:56:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:56:07,924 INFO L225 Difference]: With dead ends: 21321 [2021-12-06 19:56:07,924 INFO L226 Difference]: Without dead ends: 21319 [2021-12-06 19:56:07,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 195 SyntacticMatches, 8 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34640 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5132, Invalid=72988, Unknown=0, NotChecked=0, Total=78120 [2021-12-06 19:56:07,933 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 426 mSDsluCounter, 3585 mSDsCounter, 0 mSdLazyCounter, 10922 mSolverCounterSat, 2132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 4299 SdHoareTripleChecker+Invalid, 13054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2132 IncrementalHoareTripleChecker+Valid, 10922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:56:07,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 4299 Invalid, 13054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2132 Valid, 10922 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 19:56:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21319 states. [2021-12-06 19:56:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21319 to 1604. [2021-12-06 19:56:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1198 states have (on average 1.4282136894824708) internal successors, (1711), 1198 states have internal predecessors, (1711), 390 states have call successors, (390), 15 states have call predecessors, (390), 15 states have return successors, (390), 390 states have call predecessors, (390), 390 states have call successors, (390) [2021-12-06 19:56:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2491 transitions. [2021-12-06 19:56:08,843 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2491 transitions. Word has length 95 [2021-12-06 19:56:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:56:08,843 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 2491 transitions. [2021-12-06 19:56:08,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-06 19:56:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2491 transitions. [2021-12-06 19:56:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:56:08,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:56:08,847 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:56:08,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:56:09,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:09,048 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:56:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:56:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash -737806033, now seen corresponding path program 2 times [2021-12-06 19:56:09,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:56:09,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991084325] [2021-12-06 19:56:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:56:09,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:56:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:56:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:56:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:56:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:56:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:56:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:56:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:56:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 19:56:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 19:56:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:56:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:56:09,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:56:09,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991084325] [2021-12-06 19:56:09,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991084325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:56:09,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913550787] [2021-12-06 19:56:09,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:56:09,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:56:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:56:09,255 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:56:09,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:56:09,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:56:09,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:56:09,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:56:09,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:56:09,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:56:09,566 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 19:56:09,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:56:09,635 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:56:09,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 19:56:09,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:56:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 19:56:09,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:56:10,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 19:56:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-06 19:56:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:56:10,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913550787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:56:10,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:56:10,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2021-12-06 19:56:10,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236925400] [2021-12-06 19:56:10,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:56:10,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 19:56:10,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:56:10,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 19:56:10,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 19:56:10,802 INFO L87 Difference]: Start difference. First operand 1604 states and 2491 transitions. Second operand has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-06 19:59:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:59:19,027 INFO L93 Difference]: Finished difference Result 11362 states and 18027 transitions. [2021-12-06 19:59:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2021-12-06 19:59:19,027 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 95 [2021-12-06 19:59:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:59:19,047 INFO L225 Difference]: With dead ends: 11362 [2021-12-06 19:59:19,047 INFO L226 Difference]: Without dead ends: 11360 [2021-12-06 19:59:19,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 180 SyntacticMatches, 7 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24591 ImplicationChecksByTransitivity, 179.8s TimeCoverageRelationStatistics Valid=6239, Invalid=53453, Unknown=88, NotChecked=0, Total=59780 [2021-12-06 19:59:19,054 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 1255 mSDsluCounter, 3147 mSDsCounter, 0 mSdLazyCounter, 8546 mSolverCounterSat, 3197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 3530 SdHoareTripleChecker+Invalid, 12202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3197 IncrementalHoareTripleChecker+Valid, 8546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:59:19,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1276 Valid, 3530 Invalid, 12202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3197 Valid, 8546 Invalid, 0 Unknown, 459 Unchecked, 4.5s Time] [2021-12-06 19:59:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11360 states. [2021-12-06 19:59:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11360 to 1811. [2021-12-06 19:59:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1348 states have (on average 1.4339762611275964) internal successors, (1933), 1348 states have internal predecessors, (1933), 444 states have call successors, (444), 18 states have call predecessors, (444), 18 states have return successors, (444), 444 states have call predecessors, (444), 444 states have call successors, (444) [2021-12-06 19:59:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2821 transitions. [2021-12-06 19:59:19,923 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2821 transitions. Word has length 95 [2021-12-06 19:59:19,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:59:19,923 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2821 transitions. [2021-12-06 19:59:19,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-06 19:59:19,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2821 transitions. [2021-12-06 19:59:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 19:59:19,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:59:19,926 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:59:19,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 19:59:20,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 19:59:20,127 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:59:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:59:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash 519418531, now seen corresponding path program 9 times [2021-12-06 19:59:20,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:59:20,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808004741] [2021-12-06 19:59:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:59:20,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:59:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:59:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 19:59:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:59:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 19:59:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 19:59:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:59:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:59:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 19:59:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 19:59:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:59:20,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:59:20,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808004741] [2021-12-06 19:59:20,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808004741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:59:20,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26716687] [2021-12-06 19:59:20,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:59:20,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:59:20,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:59:20,295 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:59:20,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:59:20,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 19:59:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:59:20,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 19:59:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:59:20,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 19:59:32,848 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 19:59:32,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 19:59:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 19:59:33,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:59:35,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 19:59:35,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 19:59:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:59:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26716687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:59:35,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:59:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 32 [2021-12-06 19:59:35,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408521177] [2021-12-06 19:59:35,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:59:35,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 19:59:35,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:59:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 19:59:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=861, Unknown=7, NotChecked=0, Total=992 [2021-12-06 19:59:35,256 INFO L87 Difference]: Start difference. First operand 1811 states and 2821 transitions. Second operand has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 states have internal predecessors, (137), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-06 20:00:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:00:34,798 INFO L93 Difference]: Finished difference Result 13156 states and 21166 transitions. [2021-12-06 20:00:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-06 20:00:34,798 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 states have internal predecessors, (137), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 99 [2021-12-06 20:00:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:00:34,826 INFO L225 Difference]: With dead ends: 13156 [2021-12-06 20:00:34,826 INFO L226 Difference]: Without dead ends: 13154 [2021-12-06 20:00:34,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 239 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4147 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=1168, Invalid=10572, Unknown=32, NotChecked=0, Total=11772 [2021-12-06 20:00:34,830 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 341 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 4090 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 4986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 4090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:00:34,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1653 Invalid, 4986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 4090 Invalid, 0 Unknown, 330 Unchecked, 1.7s Time] [2021-12-06 20:00:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13154 states. [2021-12-06 20:00:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13154 to 3061. [2021-12-06 20:00:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 2268 states have (on average 1.449294532627866) internal successors, (3287), 2268 states have internal predecessors, (3287), 768 states have call successors, (768), 24 states have call predecessors, (768), 24 states have return successors, (768), 768 states have call predecessors, (768), 768 states have call successors, (768) [2021-12-06 20:00:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 4823 transitions. [2021-12-06 20:00:36,346 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 4823 transitions. Word has length 99 [2021-12-06 20:00:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:00:36,346 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 4823 transitions. [2021-12-06 20:00:36,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 states have internal predecessors, (137), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-06 20:00:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 4823 transitions. [2021-12-06 20:00:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 20:00:36,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:00:36,355 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:00:36,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 20:00:36,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:00:36,556 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:00:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:00:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash 943065253, now seen corresponding path program 3 times [2021-12-06 20:00:36,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:00:36,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871366574] [2021-12-06 20:00:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:00:36,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:00:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 20:00:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 20:00:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 20:00:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 20:00:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:00:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 20:00:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 20:00:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 20:00:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 20:00:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 20:00:36,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:00:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871366574] [2021-12-06 20:00:36,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871366574] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:00:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204409416] [2021-12-06 20:00:36,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:00:36,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:00:36,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:00:36,744 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:00:36,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 20:00:37,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 20:00:37,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:00:37,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 20:00:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:00:37,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 20:00:37,240 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 20:00:37,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 20:00:37,558 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:00:37,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2021-12-06 20:00:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 20:00:37,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:00:37,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 20:00:37,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 20:00:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 20:00:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204409416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:00:37,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:00:37,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 16] total 38 [2021-12-06 20:00:37,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680557587] [2021-12-06 20:00:37,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:00:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 20:00:37,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:00:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 20:00:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 20:00:37,823 INFO L87 Difference]: Start difference. First operand 3061 states and 4823 transitions. Second operand has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 38 states have internal predecessors, (161), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-06 20:00:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:00:57,053 INFO L93 Difference]: Finished difference Result 13491 states and 21492 transitions. [2021-12-06 20:00:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 20:00:57,054 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 38 states have internal predecessors, (161), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 99 [2021-12-06 20:00:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:00:57,073 INFO L225 Difference]: With dead ends: 13491 [2021-12-06 20:00:57,073 INFO L226 Difference]: Without dead ends: 13489 [2021-12-06 20:00:57,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1031, Invalid=10306, Unknown=5, NotChecked=0, Total=11342 [2021-12-06 20:00:57,077 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 501 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 2794 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 3785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 2794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:00:57,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 1650 Invalid, 3785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 2794 Invalid, 0 Unknown, 250 Unchecked, 1.4s Time] [2021-12-06 20:00:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13489 states. [2021-12-06 20:00:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13489 to 4341. [2021-12-06 20:00:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4341 states, 3227 states have (on average 1.4542919119925628) internal successors, (4693), 3233 states have internal predecessors, (4693), 1083 states have call successors, (1083), 30 states have call predecessors, (1083), 30 states have return successors, (1083), 1077 states have call predecessors, (1083), 1083 states have call successors, (1083) [2021-12-06 20:00:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4341 states to 4341 states and 6859 transitions. [2021-12-06 20:00:59,187 INFO L78 Accepts]: Start accepts. Automaton has 4341 states and 6859 transitions. Word has length 99 [2021-12-06 20:00:59,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:00:59,187 INFO L470 AbstractCegarLoop]: Abstraction has 4341 states and 6859 transitions. [2021-12-06 20:00:59,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.2368421052631575) internal successors, (161), 38 states have internal predecessors, (161), 12 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-06 20:00:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4341 states and 6859 transitions. [2021-12-06 20:00:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:00:59,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:00:59,193 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:00:59,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 20:00:59,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:00:59,394 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:00:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:00:59,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1220267295, now seen corresponding path program 3 times [2021-12-06 20:00:59,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:00:59,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672676704] [2021-12-06 20:00:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:00:59,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:00:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 20:00:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 20:00:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 20:00:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 20:00:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:00:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 20:00:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 20:00:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 20:00:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 20:00:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 20:00:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 20:00:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 20:00:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-06 20:00:59,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:00:59,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672676704] [2021-12-06 20:00:59,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672676704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:00:59,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204175173] [2021-12-06 20:00:59,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:00:59,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:00:59,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:00:59,668 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:00:59,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_813a61dd-1911-4029-91b9-448929446828/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:00:59,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 20:00:59,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:00:59,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 20:00:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:00,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 20:01:00,109 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 20:01:00,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 20:01:00,169 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 20:01:00,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 20:01:00,245 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 20:01:00,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 20:01:00,300 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 20:01:00,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 20:01:00,356 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 20:01:00,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 20:01:00,433 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 20:01:00,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2021-12-06 20:01:06,630 INFO L354 Elim1Store]: treesize reduction 237, result has 23.8 percent of original size [2021-12-06 20:01:06,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 98 [2021-12-06 20:01:57,602 INFO L354 Elim1Store]: treesize reduction 951, result has 35.2 percent of original size [2021-12-06 20:01:57,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 193 treesize of output 596