./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 4e2993d4b0d2c145cb6ebddb0d9f125eb6995ee629adf15e0b0f7e55a8d8a49a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:18:00,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:18:00,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:18:00,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:18:00,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:18:00,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:18:00,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:18:00,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:18:00,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:18:00,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:18:00,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:18:00,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:18:00,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:18:00,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:18:00,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:18:00,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:18:00,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:18:00,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:18:00,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:18:00,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:18:00,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:18:00,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:18:00,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:18:00,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:18:00,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:18:00,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:18:00,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:18:00,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:18:00,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:18:00,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:18:00,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:18:00,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:18:00,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:18:00,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:18:00,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:18:00,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:18:00,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:18:00,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:18:00,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:18:00,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:18:00,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:18:00,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:18:00,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:18:00,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:18:00,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:18:00,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:18:00,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:18:00,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:18:00,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:18:00,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:18:00,472 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:18:00,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:18:00,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:18:00,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:18:00,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:18:00,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:18:00,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:18:00,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:18:00,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:18:00,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:18:00,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:18:00,474 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:18:00,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:18:00,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:18:00,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:18:00,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:18:00,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:18:00,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:18:00,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:18:00,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:18:00,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:18:00,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:18:00,476 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:18:00,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:18:00,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:18:00,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:18:00,477 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e2993d4b0d2c145cb6ebddb0d9f125eb6995ee629adf15e0b0f7e55a8d8a49a [2021-12-17 11:18:00,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:18:00,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:18:00,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:18:00,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:18:00,705 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:18:00,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c [2021-12-17 11:18:00,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3407627f9/58f10e7710e24bf7951ce1161b13959a/FLAGbd9d46f74 [2021-12-17 11:18:01,077 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:18:01,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c [2021-12-17 11:18:01,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3407627f9/58f10e7710e24bf7951ce1161b13959a/FLAGbd9d46f74 [2021-12-17 11:18:01,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3407627f9/58f10e7710e24bf7951ce1161b13959a [2021-12-17 11:18:01,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:18:01,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:18:01,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:18:01,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:18:01,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:18:01,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e4c744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01, skipping insertion in model container [2021-12-17 11:18:01,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:18:01,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:18:01,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c[588,601] [2021-12-17 11:18:01,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:18:01,248 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:18:01,256 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c[588,601] [2021-12-17 11:18:01,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:18:01,273 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:18:01,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01 WrapperNode [2021-12-17 11:18:01,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:18:01,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:18:01,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:18:01,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:18:01,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,297 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-12-17 11:18:01,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:18:01,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:18:01,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:18:01,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:18:01,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:18:01,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:18:01,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:18:01,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:18:01,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (1/1) ... [2021-12-17 11:18:01,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:18:01,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:01,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 11:18:01,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 11:18:01,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:18:01,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:18:01,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:18:01,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:18:01,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:18:01,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:18:01,408 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:18:01,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:18:01,503 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:18:01,508 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:18:01,509 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 11:18:01,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:18:01 BoogieIcfgContainer [2021-12-17 11:18:01,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:18:01,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:18:01,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:18:01,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:18:01,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:18:01" (1/3) ... [2021-12-17 11:18:01,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a9627c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:18:01, skipping insertion in model container [2021-12-17 11:18:01,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:18:01" (2/3) ... [2021-12-17 11:18:01,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a9627c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:18:01, skipping insertion in model container [2021-12-17 11:18:01,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:18:01" (3/3) ... [2021-12-17 11:18:01,537 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound10.c [2021-12-17 11:18:01,541 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:18:01,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:18:01,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:18:01,585 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 [2021-12-17 11:18:01,586 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:18:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 11:18:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 11:18:01,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:01,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:01,605 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:01,611 INFO L85 PathProgramCache]: Analyzing trace with hash -588951690, now seen corresponding path program 1 times [2021-12-17 11:18:01,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:01,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818650039] [2021-12-17 11:18:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:01,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:18:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:18:01,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:01,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818650039] [2021-12-17 11:18:01,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818650039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:18:01,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:18:01,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:18:01,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905642630] [2021-12-17 11:18:01,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:18:01,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:18:01,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:18:01,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:18:01,753 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:18:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:01,776 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-12-17 11:18:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:18:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 11:18:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:01,787 INFO L225 Difference]: With dead ends: 51 [2021-12-17 11:18:01,788 INFO L226 Difference]: Without dead ends: 23 [2021-12-17 11:18:01,791 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 [2021-12-17 11:18:01,796 INFO L933 BasicCegarLoop]: 37 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, 37 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 [2021-12-17 11:18:01,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:18:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-17 11:18:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-17 11:18:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:18:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2021-12-17 11:18:01,830 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2021-12-17 11:18:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:01,830 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2021-12-17 11:18:01,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:18:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2021-12-17 11:18:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 11:18:01,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:01,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:01,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:18:01,833 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1187604804, now seen corresponding path program 1 times [2021-12-17 11:18:01,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:01,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768576073] [2021-12-17 11:18:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:01,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:18:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:18:01,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:01,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768576073] [2021-12-17 11:18:01,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768576073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:18:01,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:18:01,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:18:01,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123363343] [2021-12-17 11:18:01,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:18:01,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:18:01,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:18:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:18:01,985 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:18:02,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:02,052 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-12-17 11:18:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:18:02,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 11:18:02,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:02,054 INFO L225 Difference]: With dead ends: 29 [2021-12-17 11:18:02,054 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 11:18:02,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:18:02,058 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:02,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 85 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:18:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 11:18:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 11:18:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:18:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-12-17 11:18:02,074 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2021-12-17 11:18:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:02,075 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-12-17 11:18:02,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:18:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-12-17 11:18:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 11:18:02,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:02,079 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:02,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 11:18:02,079 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1137950087, now seen corresponding path program 1 times [2021-12-17 11:18:02,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:02,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174918682] [2021-12-17 11:18:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:02,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:02,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:02,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234071833] [2021-12-17 11:18:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:02,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:02,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:02,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:02,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:18:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:18:02,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:18:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:18:02,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:18:02,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174918682] [2021-12-17 11:18:02,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234071833] [2021-12-17 11:18:02,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234071833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:18:02,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:18:02,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:18:02,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336371665] [2021-12-17 11:18:02,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:18:02,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:18:02,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:18:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:18:02,193 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:18:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:02,228 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2021-12-17 11:18:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:18:02,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-17 11:18:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:02,229 INFO L225 Difference]: With dead ends: 46 [2021-12-17 11:18:02,229 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 11:18:02,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:18:02,230 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:02,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:18:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 11:18:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-12-17 11:18:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 11:18:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-12-17 11:18:02,237 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 14 [2021-12-17 11:18:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:02,237 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-12-17 11:18:02,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:18:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-12-17 11:18:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 11:18:02,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:02,238 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:02,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:02,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:02,456 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1500531996, now seen corresponding path program 1 times [2021-12-17 11:18:02,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:02,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277033788] [2021-12-17 11:18:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:02,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:02,465 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:02,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281228176] [2021-12-17 11:18:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:02,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:02,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:02,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:02,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:18:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:18:02,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:18:02,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:18:02,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:18:02,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277033788] [2021-12-17 11:18:02,609 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281228176] [2021-12-17 11:18:02,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281228176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:18:02,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:18:02,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:18:02,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164606753] [2021-12-17 11:18:02,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:18:02,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:18:02,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:18:02,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:18:02,610 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:18:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:02,660 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-12-17 11:18:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:18:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-17 11:18:02,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:02,662 INFO L225 Difference]: With dead ends: 50 [2021-12-17 11:18:02,662 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 11:18:02,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:18:02,664 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:02,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 133 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:18:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 11:18:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-17 11:18:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 11:18:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2021-12-17 11:18:02,678 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 19 [2021-12-17 11:18:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:02,678 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2021-12-17 11:18:02,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:18:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2021-12-17 11:18:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 11:18:02,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:02,679 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:02,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:02,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 11:18:02,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:02,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1926539111, now seen corresponding path program 1 times [2021-12-17 11:18:02,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:02,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081038850] [2021-12-17 11:18:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:02,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:02,905 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:02,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039308697] [2021-12-17 11:18:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:02,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:02,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:02,907 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:02,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:18:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:18:02,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 11:18:02,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 11:18:03,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:18:03,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081038850] [2021-12-17 11:18:03,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039308697] [2021-12-17 11:18:03,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039308697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:18:03,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:18:03,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:18:03,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205709296] [2021-12-17 11:18:03,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:18:03,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:18:03,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:03,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:18:03,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:18:03,049 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:18:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:03,106 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-12-17 11:18:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:18:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-12-17 11:18:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:03,107 INFO L225 Difference]: With dead ends: 58 [2021-12-17 11:18:03,107 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 11:18:03,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:18:03,108 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:03,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 125 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:18:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 11:18:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-17 11:18:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 11:18:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-12-17 11:18:03,113 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 24 [2021-12-17 11:18:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:03,113 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-12-17 11:18:03,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:18:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-12-17 11:18:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 11:18:03,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:03,114 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:03,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:03,320 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash -492592860, now seen corresponding path program 1 times [2021-12-17 11:18:03,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:03,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613380328] [2021-12-17 11:18:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:03,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:03,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:03,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843314525] [2021-12-17 11:18:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:03,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:03,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:03,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:03,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:18:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:18:03,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 11:18:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 11:18:03,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 11:18:03,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613380328] [2021-12-17 11:18:03,632 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843314525] [2021-12-17 11:18:03,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843314525] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:18:03,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:18:03,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 11:18:03,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698747388] [2021-12-17 11:18:03,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:03,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:18:03,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:03,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:18:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:18:03,633 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 11:18:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:03,888 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-12-17 11:18:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:18:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41 [2021-12-17 11:18:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:03,890 INFO L225 Difference]: With dead ends: 69 [2021-12-17 11:18:03,890 INFO L226 Difference]: Without dead ends: 67 [2021-12-17 11:18:03,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:18:03,890 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:03,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 160 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:18:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-17 11:18:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2021-12-17 11:18:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 11:18:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-17 11:18:03,899 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 41 [2021-12-17 11:18:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:03,900 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-17 11:18:03,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 11:18:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-17 11:18:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 11:18:03,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:03,900 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:03,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:04,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:04,103 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1495173479, now seen corresponding path program 2 times [2021-12-17 11:18:04,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:04,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209751224] [2021-12-17 11:18:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:04,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:04,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:04,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003924127] [2021-12-17 11:18:04,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:18:04,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:04,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:04,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:18:04,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:18:04,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:18:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 11:18:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 11:18:04,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 11:18:04,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209751224] [2021-12-17 11:18:04,358 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003924127] [2021-12-17 11:18:04,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003924127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:18:04,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:18:04,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 11:18:04,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765192313] [2021-12-17 11:18:04,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:04,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:18:04,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:18:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:18:04,360 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-17 11:18:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:04,457 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-12-17 11:18:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:18:04,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46 [2021-12-17 11:18:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:04,461 INFO L225 Difference]: With dead ends: 73 [2021-12-17 11:18:04,461 INFO L226 Difference]: Without dead ends: 71 [2021-12-17 11:18:04,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:18:04,462 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:04,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 268 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:18:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-17 11:18:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2021-12-17 11:18:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 11:18:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-17 11:18:04,474 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 46 [2021-12-17 11:18:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:04,474 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-17 11:18:04,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-17 11:18:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-17 11:18:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 11:18:04,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:04,475 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:04,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:04,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:04,692 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash 900098756, now seen corresponding path program 3 times [2021-12-17 11:18:04,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:04,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512479560] [2021-12-17 11:18:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:04,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:04,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:04,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712572736] [2021-12-17 11:18:04,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:18:04,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:04,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:04,701 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:04,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:18:04,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 11:18:04,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:18:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 11:18:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 11:18:04,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 11:18:05,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512479560] [2021-12-17 11:18:05,067 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712572736] [2021-12-17 11:18:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712572736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:18:05,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:18:05,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 11:18:05,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238562738] [2021-12-17 11:18:05,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:05,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:18:05,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:18:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:18:05,068 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-17 11:18:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:05,250 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-12-17 11:18:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:18:05,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 51 [2021-12-17 11:18:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:05,251 INFO L225 Difference]: With dead ends: 85 [2021-12-17 11:18:05,251 INFO L226 Difference]: Without dead ends: 77 [2021-12-17 11:18:05,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:18:05,252 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:05,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 143 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:18:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-17 11:18:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-12-17 11:18:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 45 states have internal predecessors, (45), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 11:18:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-12-17 11:18:05,259 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 51 [2021-12-17 11:18:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:05,259 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-12-17 11:18:05,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-17 11:18:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-12-17 11:18:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 11:18:05,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:05,261 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:05,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:05,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:05,461 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1061977627, now seen corresponding path program 1 times [2021-12-17 11:18:05,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:05,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297749234] [2021-12-17 11:18:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:05,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:05,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:05,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192730821] [2021-12-17 11:18:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:05,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:05,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:05,470 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:05,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:18:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:18:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 11:18:05,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-17 11:18:05,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:05,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297749234] [2021-12-17 11:18:05,943 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192730821] [2021-12-17 11:18:05,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192730821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:18:05,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:18:05,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 11:18:05,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103436712] [2021-12-17 11:18:05,944 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:05,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:18:05,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:18:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:18:05,945 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 11:18:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:06,029 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-12-17 11:18:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:18:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2021-12-17 11:18:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:06,031 INFO L225 Difference]: With dead ends: 87 [2021-12-17 11:18:06,031 INFO L226 Difference]: Without dead ends: 85 [2021-12-17 11:18:06,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:18:06,031 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:06,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:18:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-17 11:18:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-12-17 11:18:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 11:18:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-12-17 11:18:06,039 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 67 [2021-12-17 11:18:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:06,039 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-12-17 11:18:06,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 11:18:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-12-17 11:18:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 11:18:06,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:06,040 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:06,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:06,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:06,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1246911088, now seen corresponding path program 1 times [2021-12-17 11:18:06,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:06,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799215755] [2021-12-17 11:18:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:06,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:06,259 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226602616] [2021-12-17 11:18:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:06,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:06,260 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:06,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 11:18:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:18:06,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 11:18:06,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-17 11:18:06,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:06,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:06,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799215755] [2021-12-17 11:18:06,766 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:06,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226602616] [2021-12-17 11:18:06,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226602616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:18:06,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:18:06,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 11:18:06,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903654016] [2021-12-17 11:18:06,767 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:06,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:18:06,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:18:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:18:06,768 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 11:18:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:06,849 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-12-17 11:18:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:18:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72 [2021-12-17 11:18:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:06,850 INFO L225 Difference]: With dead ends: 91 [2021-12-17 11:18:06,850 INFO L226 Difference]: Without dead ends: 78 [2021-12-17 11:18:06,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:18:06,851 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:06,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 198 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:18:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-17 11:18:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-17 11:18:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 11:18:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-12-17 11:18:06,857 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 72 [2021-12-17 11:18:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:06,858 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-12-17 11:18:06,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 11:18:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-12-17 11:18:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 11:18:06,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:06,859 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:06,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:07,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 11:18:07,076 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:07,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1961933060, now seen corresponding path program 4 times [2021-12-17 11:18:07,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:07,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742398176] [2021-12-17 11:18:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:07,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:07,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:07,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762214779] [2021-12-17 11:18:07,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:18:07,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:07,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:07,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:07,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 11:18:07,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:18:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:18:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 11:18:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 56 proven. 16 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-17 11:18:07,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 56 proven. 16 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-17 11:18:07,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742398176] [2021-12-17 11:18:07,643 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762214779] [2021-12-17 11:18:07,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762214779] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:18:07,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:18:07,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-17 11:18:07,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145112478] [2021-12-17 11:18:07,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:07,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 11:18:07,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 11:18:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-17 11:18:07,645 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-17 11:18:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:08,112 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-12-17 11:18:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 11:18:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) Word has length 73 [2021-12-17 11:18:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:08,115 INFO L225 Difference]: With dead ends: 109 [2021-12-17 11:18:08,115 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 11:18:08,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-17 11:18:08,116 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:08,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 153 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 11:18:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 11:18:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2021-12-17 11:18:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 62 states have internal predecessors, (62), 20 states have call successors, (20), 16 states have call predecessors, (20), 16 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 11:18:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-12-17 11:18:08,124 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 73 [2021-12-17 11:18:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:08,124 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-12-17 11:18:08,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-17 11:18:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-12-17 11:18:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-17 11:18:08,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:08,125 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:08,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:08,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:08,337 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:08,337 INFO L85 PathProgramCache]: Analyzing trace with hash 671163038, now seen corresponding path program 2 times [2021-12-17 11:18:08,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:08,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110318487] [2021-12-17 11:18:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:08,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:08,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:08,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224440996] [2021-12-17 11:18:08,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:18:08,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:08,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:08,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:08,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 11:18:08,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:18:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:18:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 11:18:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-17 11:18:08,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:08,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110318487] [2021-12-17 11:18:08,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224440996] [2021-12-17 11:18:08,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224440996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:18:08,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:18:08,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 11:18:08,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516056902] [2021-12-17 11:18:08,877 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:08,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:18:08,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:08,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:18:08,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:18:08,878 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-17 11:18:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:08,989 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2021-12-17 11:18:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 11:18:08,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 94 [2021-12-17 11:18:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:08,990 INFO L225 Difference]: With dead ends: 114 [2021-12-17 11:18:08,990 INFO L226 Difference]: Without dead ends: 112 [2021-12-17 11:18:08,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 11:18:08,991 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:08,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 234 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:18:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-17 11:18:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-12-17 11:18:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 25 states have call successors, (25), 18 states have call predecessors, (25), 18 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 11:18:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2021-12-17 11:18:09,000 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 94 [2021-12-17 11:18:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:09,000 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-12-17 11:18:09,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-17 11:18:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2021-12-17 11:18:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 11:18:09,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:09,001 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:09,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:09,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 11:18:09,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -674604307, now seen corresponding path program 2 times [2021-12-17 11:18:09,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:09,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290081544] [2021-12-17 11:18:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:09,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:09,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:09,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120514991] [2021-12-17 11:18:09,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:18:09,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:09,224 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:09,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 11:18:09,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:18:09,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:18:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 11:18:09,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-17 11:18:09,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:09,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:09,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290081544] [2021-12-17 11:18:09,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:09,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120514991] [2021-12-17 11:18:09,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120514991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:18:09,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:18:09,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 11:18:09,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170809021] [2021-12-17 11:18:09,708 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:09,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:18:09,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:18:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:18:09,710 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-17 11:18:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:09,819 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2021-12-17 11:18:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 11:18:09,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 99 [2021-12-17 11:18:09,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:09,821 INFO L225 Difference]: With dead ends: 122 [2021-12-17 11:18:09,821 INFO L226 Difference]: Without dead ends: 109 [2021-12-17 11:18:09,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 11:18:09,821 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:09,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 243 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:18:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-17 11:18:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-12-17 11:18:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 23 states have call successors, (23), 18 states have call predecessors, (23), 18 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 11:18:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-12-17 11:18:09,832 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 99 [2021-12-17 11:18:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:09,832 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-12-17 11:18:09,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-17 11:18:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-12-17 11:18:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 11:18:09,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:09,833 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:09,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:10,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 11:18:10,047 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1837317061, now seen corresponding path program 3 times [2021-12-17 11:18:10,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:10,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018494447] [2021-12-17 11:18:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:10,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:10,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:10,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285755071] [2021-12-17 11:18:10,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:18:10,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:10,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:10,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:10,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 11:18:10,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 11:18:10,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:18:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 11:18:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2021-12-17 11:18:10,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:11,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018494447] [2021-12-17 11:18:11,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285755071] [2021-12-17 11:18:11,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285755071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:18:11,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:18:11,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-17 11:18:11,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181613893] [2021-12-17 11:18:11,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:11,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 11:18:11,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 11:18:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:18:11,012 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-17 11:18:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:11,183 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2021-12-17 11:18:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 11:18:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 121 [2021-12-17 11:18:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:11,185 INFO L225 Difference]: With dead ends: 115 [2021-12-17 11:18:11,185 INFO L226 Difference]: Without dead ends: 111 [2021-12-17 11:18:11,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-17 11:18:11,185 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:11,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:18:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-17 11:18:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-12-17 11:18:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 23 states have call successors, (23), 19 states have call predecessors, (23), 18 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 11:18:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-12-17 11:18:11,193 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 121 [2021-12-17 11:18:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:11,193 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-12-17 11:18:11,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-17 11:18:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-12-17 11:18:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 11:18:11,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:18:11,194 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:18:11,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 11:18:11,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 11:18:11,395 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:18:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:18:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1974193296, now seen corresponding path program 3 times [2021-12-17 11:18:11,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:18:11,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116935660] [2021-12-17 11:18:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:18:11,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:18:11,402 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:18:11,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654380532] [2021-12-17 11:18:11,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:18:11,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:18:11,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:18:11,404 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:18:11,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 11:18:11,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 11:18:11,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:18:11,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 11:18:11,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:18:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-12-17 11:18:15,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:18:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2021-12-17 11:18:18,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:18:18,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116935660] [2021-12-17 11:18:18,169 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:18:18,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654380532] [2021-12-17 11:18:18,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654380532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:18:18,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:18:18,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-12-17 11:18:18,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987003635] [2021-12-17 11:18:18,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:18:18,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 11:18:18,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:18:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 11:18:18,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-17 11:18:18,171 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2021-12-17 11:18:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:18:18,857 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-12-17 11:18:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 11:18:18,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) Word has length 126 [2021-12-17 11:18:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:18:18,857 INFO L225 Difference]: With dead ends: 111 [2021-12-17 11:18:18,857 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 11:18:18,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-17 11:18:18,859 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:18:18,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 11:18:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 11:18:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 11:18:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:18:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 11:18:18,860 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 126 [2021-12-17 11:18:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:18:18,860 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 11:18:18,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2021-12-17 11:18:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 11:18:18,860 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 11:18:18,862 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 11:18:18,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-17 11:18:19,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 11:18:19,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 11:18:23,032 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 11:18:23,033 INFO L854 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 10) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= |ULTIMATE.start_main_~z~0#1| (+ (* 6 |ULTIMATE.start_main_~n~0#1|) 6)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (+ (* 12 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~z~0#1|)) (+ .cse0 12)) (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) .cse0 6)))) [2021-12-17 11:18:23,033 INFO L854 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse5 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~y~0#1| (+ .cse5 (* 3 |ULTIMATE.start_main_~n~0#1|) 1))) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse1 (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse5 (* 9 |ULTIMATE.start_main_~n~0#1|) 7))) (.cse2 (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 6)))) (or (and (= |ULTIMATE.start_main_~z~0#1| 18) .cse0 (<= 1 |ULTIMATE.start_main_~a~0#1|) .cse1 .cse2 (< |ULTIMATE.start_main_~a~0#1| 2)) (and (< |ULTIMATE.start_main_~a~0#1| 1) .cse0 .cse3 .cse1 .cse2 (= |ULTIMATE.start_main_~x~0#1| 1)) (and (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~z~0#1| (+ (* 6 |ULTIMATE.start_main_~n~0#1|) 6)) (= |ULTIMATE.start_main_~z~0#1| 6)) (let ((.cse4 (div (+ (* |ULTIMATE.start_main_~z~0#1| (- 1)) 6) (- 6)))) (and (<= |ULTIMATE.start_main_~a~0#1| 10) (< |ULTIMATE.start_main_~a~0#1| .cse4) .cse0 .cse3 (<= .cse4 (+ |ULTIMATE.start_main_~a~0#1| 1)) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse1 .cse2))))) [2021-12-17 11:18:23,033 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (and (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 (* 3 |ULTIMATE.start_main_~n~0#1|) 1)) (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse0 (* 9 |ULTIMATE.start_main_~n~0#1|) 7)) (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 6)))) [2021-12-17 11:18:23,033 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (and (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 (* 3 |ULTIMATE.start_main_~n~0#1|) 1)) (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse0 (* 9 |ULTIMATE.start_main_~n~0#1|) 7)) (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 6)))) [2021-12-17 11:18:23,033 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse5 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~y~0#1| (+ .cse5 (* 3 |ULTIMATE.start_main_~n~0#1|) 1))) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse1 (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse5 (* 9 |ULTIMATE.start_main_~n~0#1|) 7))) (.cse2 (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 6)))) (or (and (= |ULTIMATE.start_main_~z~0#1| 18) .cse0 (<= 1 |ULTIMATE.start_main_~a~0#1|) .cse1 .cse2 (< |ULTIMATE.start_main_~a~0#1| 2)) (and (< |ULTIMATE.start_main_~a~0#1| 1) .cse0 .cse3 .cse1 .cse2 (= |ULTIMATE.start_main_~x~0#1| 1)) (and (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~z~0#1| (+ (* 6 |ULTIMATE.start_main_~n~0#1|) 6)) (= |ULTIMATE.start_main_~z~0#1| 6)) (let ((.cse4 (div (+ (* |ULTIMATE.start_main_~z~0#1| (- 1)) 6) (- 6)))) (and (<= |ULTIMATE.start_main_~a~0#1| 10) (< |ULTIMATE.start_main_~a~0#1| .cse4) .cse0 .cse3 (<= .cse4 (+ |ULTIMATE.start_main_~a~0#1| 1)) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse1 .cse2))))) [2021-12-17 11:18:23,033 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-12-17 11:18:23,033 INFO L858 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2021-12-17 11:18:23,033 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (and (<= |ULTIMATE.start_main_~a~0#1| 10) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 (* 3 |ULTIMATE.start_main_~n~0#1|) 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse0 (* 9 |ULTIMATE.start_main_~n~0#1|) 7)) (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 6)))) [2021-12-17 11:18:23,033 INFO L854 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 10) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= |ULTIMATE.start_main_~z~0#1| (+ (* 6 |ULTIMATE.start_main_~n~0#1|) 6)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (+ (* 12 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~z~0#1|)) (+ .cse0 12)) (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) .cse0 6)))) [2021-12-17 11:18:23,033 INFO L854 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (let ((.cse1 (* 3 .cse0))) (and (<= |ULTIMATE.start_main_~a~0#1| 10) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (+ (* 6 .cse0) (* 12 |ULTIMATE.start_main_~n~0#1|) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= |ULTIMATE.start_main_~y~0#1| (+ .cse1 (* 3 |ULTIMATE.start_main_~n~0#1|) 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse1 (* 9 |ULTIMATE.start_main_~n~0#1|) 7)) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)))) [2021-12-17 11:18:23,033 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 11:18:23,033 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 11:18:23,033 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 11:18:23,034 INFO L861 garLoopResultBuilder]: At program point L55(lines 22 56) the Hoare annotation is: true [2021-12-17 11:18:23,034 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-12-17 11:18:23,034 INFO L854 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (and (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 (* 3 |ULTIMATE.start_main_~n~0#1|) 1)) (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse0 (* 9 |ULTIMATE.start_main_~n~0#1|) 7)) (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 6)))) [2021-12-17 11:18:23,034 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse5 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~y~0#1| (+ .cse5 (* 3 |ULTIMATE.start_main_~n~0#1|) 1))) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse1 (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse5 (* 9 |ULTIMATE.start_main_~n~0#1|) 7))) (.cse2 (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 6)))) (or (and (= |ULTIMATE.start_main_~z~0#1| 18) .cse0 (<= 1 |ULTIMATE.start_main_~a~0#1|) .cse1 .cse2 (< |ULTIMATE.start_main_~a~0#1| 2)) (and (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~z~0#1| (+ (* 6 |ULTIMATE.start_main_~n~0#1|) 6)) (= |ULTIMATE.start_main_~z~0#1| 6)) (and (= |ULTIMATE.start_main_~z~0#1| (+ |ULTIMATE.start_main_~y~0#1| 5)) (< |ULTIMATE.start_main_~a~0#1| 1) .cse0 .cse3 .cse1 .cse2) (let ((.cse4 (div (+ (* |ULTIMATE.start_main_~z~0#1| (- 1)) 6) (- 6)))) (and (<= |ULTIMATE.start_main_~a~0#1| 10) .cse0 (< |ULTIMATE.start_main_~a~0#1| .cse4) .cse3 (<= .cse4 (+ |ULTIMATE.start_main_~a~0#1| 1)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse2))))) [2021-12-17 11:18:23,034 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-12-17 11:18:23,034 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (and (<= |ULTIMATE.start_main_~a~0#1| 10) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 (* 3 |ULTIMATE.start_main_~n~0#1|) 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (+ |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (+ .cse0 (* 9 |ULTIMATE.start_main_~n~0#1|) 7)) (= (+ (* 24 |ULTIMATE.start_main_~y~0#1|) (* 18 |ULTIMATE.start_main_~x~0#1|) (* 4 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 6)))) [2021-12-17 11:18:23,034 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~a~0#1| 10) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= |ULTIMATE.start_main_~z~0#1| (+ (* 6 |ULTIMATE.start_main_~n~0#1|) 6)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (+ (* 12 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) 12)) (= |ULTIMATE.start_main_~x~0#1| (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) [2021-12-17 11:18:23,034 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-12-17 11:18:23,034 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-12-17 11:18:23,035 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-12-17 11:18:23,035 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-12-17 11:18:23,035 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-12-17 11:18:23,035 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-12-17 11:18:23,037 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2021-12-17 11:18:23,038 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 11:18:23,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 11:18:23 BoogieIcfgContainer [2021-12-17 11:18:23,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 11:18:23,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 11:18:23,056 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 11:18:23,057 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 11:18:23,057 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:18:01" (3/4) ... [2021-12-17 11:18:23,059 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 11:18:23,063 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-17 11:18:23,066 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-17 11:18:23,067 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 11:18:23,067 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 11:18:23,067 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 11:18:23,089 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 11:18:23,089 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 11:18:23,090 INFO L158 Benchmark]: Toolchain (without parser) took 21992.60ms. Allocated memory was 86.0MB in the beginning and 180.4MB in the end (delta: 94.4MB). Free memory was 53.1MB in the beginning and 57.5MB in the end (delta: -4.5MB). Peak memory consumption was 88.3MB. Max. memory is 16.1GB. [2021-12-17 11:18:23,090 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 86.0MB. Free memory was 58.2MB in the beginning and 58.2MB in the end (delta: 31.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:18:23,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.76ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 53.1MB in the beginning and 99.6MB in the end (delta: -46.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 11:18:23,090 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.62ms. Allocated memory is still 123.7MB. Free memory was 99.6MB in the beginning and 98.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:18:23,091 INFO L158 Benchmark]: Boogie Preprocessor took 12.75ms. Allocated memory is still 123.7MB. Free memory was 98.4MB in the beginning and 97.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:18:23,091 INFO L158 Benchmark]: RCFGBuilder took 202.03ms. Allocated memory is still 123.7MB. Free memory was 97.0MB in the beginning and 87.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 11:18:23,091 INFO L158 Benchmark]: TraceAbstraction took 21528.18ms. Allocated memory was 123.7MB in the beginning and 180.4MB in the end (delta: 56.6MB). Free memory was 86.5MB in the beginning and 59.6MB in the end (delta: 26.8MB). Peak memory consumption was 93.8MB. Max. memory is 16.1GB. [2021-12-17 11:18:23,091 INFO L158 Benchmark]: Witness Printer took 33.07ms. Allocated memory is still 180.4MB. Free memory was 59.6MB in the beginning and 57.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:18:23,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 86.0MB. Free memory was 58.2MB in the beginning and 58.2MB in the end (delta: 31.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 173.76ms. Allocated memory was 86.0MB in the beginning and 123.7MB in the end (delta: 37.7MB). Free memory was 53.1MB in the beginning and 99.6MB in the end (delta: -46.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.62ms. Allocated memory is still 123.7MB. Free memory was 99.6MB in the beginning and 98.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.75ms. Allocated memory is still 123.7MB. Free memory was 98.4MB in the beginning and 97.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 202.03ms. Allocated memory is still 123.7MB. Free memory was 97.0MB in the beginning and 87.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 21528.18ms. Allocated memory was 123.7MB in the beginning and 180.4MB in the end (delta: 56.6MB). Free memory was 86.5MB in the beginning and 59.6MB in the end (delta: 26.8MB). Peak memory consumption was 93.8MB. Max. memory is 16.1GB. * Witness Printer took 33.07ms. Allocated memory is still 180.4MB. Free memory was 59.6MB in the beginning and 57.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.5s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 190 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 135 mSDsluCounter, 2267 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1744 mSDsCounter, 282 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1375 IncrementalHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 282 mSolverCounterUnsat, 523 mSDtfsCounter, 1375 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1374 GetRequests, 1225 SyntacticMatches, 13 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=12, InterpolantAutomatonStates: 106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 54 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 65 PreInvPairs, 111 NumberOfFragments, 1082 HoareAnnotationTreeSize, 65 FomulaSimplifications, 10342 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 14 FomulaSimplificationsInter, 16936 FormulaSimplificationTreeSizeReductionInter, 3.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 865 NumberOfCodeBlocks, 677 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1182 ConstructedInterpolants, 0 QuantifiedInterpolants, 5205 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1687 ConjunctsInSsa, 235 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5638/5874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((a <= 10 && n <= a + 1) && z == 6 * n + 6) && 0 <= a) && cond == 1) && 12 * y + 6 * z == z * z + 12) && 24 * y + 18 * x + 4 * z == y * z + z * z + 6 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-17 11:18:23,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE