./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/reducercommutativity/rangesum20.i -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 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 16:16:03,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 16:16:03,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 16:16:03,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 16:16:03,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 16:16:03,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 16:16:03,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 16:16:03,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 16:16:03,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 16:16:03,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 16:16:03,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 16:16:03,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 16:16:03,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 16:16:03,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 16:16:03,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 16:16:03,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 16:16:03,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 16:16:03,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 16:16:03,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 16:16:03,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 16:16:03,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 16:16:03,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 16:16:03,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 16:16:03,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 16:16:03,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 16:16:03,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 16:16:03,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 16:16:03,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 16:16:03,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 16:16:03,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 16:16:03,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 16:16:03,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 16:16:03,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 16:16:03,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 16:16:03,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 16:16:03,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 16:16:03,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 16:16:03,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 16:16:03,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 16:16:03,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 16:16:03,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 16:16:03,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 16:16:03,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 16:16:03,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 16:16:03,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 16:16:03,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 16:16:03,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 16:16:03,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 16:16:03,294 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 16:16:03,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 16:16:03,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 16:16:03,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 16:16:03,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 16:16:03,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 16:16:03,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 16:16:03,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 16:16:03,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 16:16:03,296 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 16:16:03,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 16:16:03,296 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 16:16:03,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 16:16:03,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 16:16:03,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 16:16:03,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 16:16:03,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 16:16:03,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 16:16:03,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 16:16:03,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 16:16:03,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 16:16:03,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 16:16:03,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 16:16:03,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 16:16:03,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 [2021-08-25 16:16:03,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 16:16:03,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 16:16:03,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 16:16:03,588 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 16:16:03,588 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 16:16:03,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-08-25 16:16:03,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797905810/3286022e3fff48a4b53ce4a094943942/FLAG42f85ab53 [2021-08-25 16:16:04,021 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 16:16:04,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-08-25 16:16:04,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797905810/3286022e3fff48a4b53ce4a094943942/FLAG42f85ab53 [2021-08-25 16:16:04,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797905810/3286022e3fff48a4b53ce4a094943942 [2021-08-25 16:16:04,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 16:16:04,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 16:16:04,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 16:16:04,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 16:16:04,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 16:16:04,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e6c96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04, skipping insertion in model container [2021-08-25 16:16:04,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 16:16:04,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 16:16:04,586 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2021-08-25 16:16:04,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 16:16:04,599 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 16:16:04,642 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2021-08-25 16:16:04,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 16:16:04,658 INFO L208 MainTranslator]: Completed translation [2021-08-25 16:16:04,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04 WrapperNode [2021-08-25 16:16:04,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 16:16:04,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 16:16:04,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 16:16:04,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 16:16:04,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 16:16:04,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 16:16:04,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 16:16:04,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 16:16:04,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 16:16:04,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 16:16:04,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 16:16:04,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 16:16:04,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (1/1) ... [2021-08-25 16:16:04,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 16:16:04,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:04,755 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) [2021-08-25 16:16:04,775 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 [2021-08-25 16:16:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 16:16:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 16:16:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 16:16:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 16:16:04,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 16:16:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 16:16:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 16:16:05,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 16:16:05,120 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-25 16:16:05,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:16:05 BoogieIcfgContainer [2021-08-25 16:16:05,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 16:16:05,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 16:16:05,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 16:16:05,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 16:16:05,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 04:16:04" (1/3) ... [2021-08-25 16:16:05,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb4e5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:16:05, skipping insertion in model container [2021-08-25 16:16:05,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:16:04" (2/3) ... [2021-08-25 16:16:05,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb4e5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:16:05, skipping insertion in model container [2021-08-25 16:16:05,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:16:05" (3/3) ... [2021-08-25 16:16:05,129 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2021-08-25 16:16:05,133 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 16:16:05,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 16:16:05,177 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 16:16:05,183 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-25 16:16:05,183 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 16:16:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-25 16:16:05,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:05,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:05,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-08-25 16:16:05,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:05,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882329245] [2021-08-25 16:16:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:05,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:16:05,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:05,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882329245] [2021-08-25 16:16:05,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882329245] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:05,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:16:05,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 16:16:05,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312393966] [2021-08-25 16:16:05,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:16:05,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:16:05,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:16:05,399 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:05,426 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-08-25 16:16:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:16:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-25 16:16:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:05,434 INFO L225 Difference]: With dead ends: 58 [2021-08-25 16:16:05,434 INFO L226 Difference]: Without dead ends: 28 [2021-08-25 16:16:05,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:16:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-25 16:16:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-08-25 16:16:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-08-25 16:16:05,461 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-08-25 16:16:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:05,461 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-08-25 16:16:05,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-08-25 16:16:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 16:16:05,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:05,463 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:05,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 16:16:05,463 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:05,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-08-25 16:16:05,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:05,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684999351] [2021-08-25 16:16:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:05,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:16:05,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:05,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684999351] [2021-08-25 16:16:05,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684999351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:05,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088682741] [2021-08-25 16:16:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:05,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:05,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:05,541 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) [2021-08-25 16:16:05,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 16:16:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 16:16:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 16:16:05,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088682741] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:05,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:05,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:16:05,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855817874] [2021-08-25 16:16:05,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:16:05,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:16:05,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:05,800 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:05,870 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-08-25 16:16:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:16:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-25 16:16:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:05,871 INFO L225 Difference]: With dead ends: 57 [2021-08-25 16:16:05,871 INFO L226 Difference]: Without dead ends: 36 [2021-08-25 16:16:05,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-25 16:16:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-08-25 16:16:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-08-25 16:16:05,878 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-08-25 16:16:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:05,879 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-08-25 16:16:05,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-08-25 16:16:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 16:16:05,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:05,881 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:05,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-25 16:16:06,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:06,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-08-25 16:16:06,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:06,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391690090] [2021-08-25 16:16:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:06,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-25 16:16:06,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:06,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391690090] [2021-08-25 16:16:06,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391690090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:06,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113045468] [2021-08-25 16:16:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:06,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:06,157 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) [2021-08-25 16:16:06,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 16:16:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:06,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 16:16:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:16:06,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113045468] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:06,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:06,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:16:06,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081689695] [2021-08-25 16:16:06,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:16:06,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:16:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:06,419 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:06,433 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-08-25 16:16:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:16:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-25 16:16:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:06,434 INFO L225 Difference]: With dead ends: 46 [2021-08-25 16:16:06,434 INFO L226 Difference]: Without dead ends: 35 [2021-08-25 16:16:06,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-25 16:16:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-08-25 16:16:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-08-25 16:16:06,439 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-08-25 16:16:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:06,439 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-08-25 16:16:06,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-08-25 16:16:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 16:16:06,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:06,448 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:06,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:06,650 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,SelfDestructingSolverStorable2 [2021-08-25 16:16:06,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:06,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:06,651 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-08-25 16:16:06,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:06,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800365125] [2021-08-25 16:16:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:06,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:16:06,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:06,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800365125] [2021-08-25 16:16:06,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800365125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:06,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479769405] [2021-08-25 16:16:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:06,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:06,689 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) [2021-08-25 16:16:06,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 16:16:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:06,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:16:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-25 16:16:06,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479769405] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:06,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:06,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:16:06,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206574254] [2021-08-25 16:16:06,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:16:06,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:06,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:16:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:06,889 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:06,915 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-08-25 16:16:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:16:06,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-25 16:16:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:06,917 INFO L225 Difference]: With dead ends: 78 [2021-08-25 16:16:06,917 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 16:16:06,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 16:16:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-08-25 16:16:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-08-25 16:16:06,921 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-08-25 16:16:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:06,921 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-08-25 16:16:06,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-08-25 16:16:06,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 16:16:06,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:06,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:06,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:07,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:07,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:07,135 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-08-25 16:16:07,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:07,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71762348] [2021-08-25 16:16:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:07,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:16:07,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:07,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71762348] [2021-08-25 16:16:07,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71762348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:07,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611390494] [2021-08-25 16:16:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:07,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:07,194 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) [2021-08-25 16:16:07,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 16:16:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:07,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:16:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:16:07,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611390494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:07,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 16:16:07,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-25 16:16:07,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186325424] [2021-08-25 16:16:07,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:16:07,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:16:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:07,370 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:07,396 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-08-25 16:16:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:16:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-25 16:16:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:07,398 INFO L225 Difference]: With dead ends: 90 [2021-08-25 16:16:07,398 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 16:16:07,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 16:16:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-08-25 16:16:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-08-25 16:16:07,411 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-08-25 16:16:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:07,411 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-08-25 16:16:07,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:07,411 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-08-25 16:16:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-25 16:16:07,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:07,414 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:07,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:07,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:07,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-08-25 16:16:07,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:07,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474285903] [2021-08-25 16:16:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:07,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-25 16:16:07,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:07,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474285903] [2021-08-25 16:16:07,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474285903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:07,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115966900] [2021-08-25 16:16:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:07,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:07,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:07,684 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) [2021-08-25 16:16:07,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 16:16:07,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-25 16:16:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 16:16:07,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-25 16:16:08,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115966900] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:08,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:08,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-08-25 16:16:08,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904171255] [2021-08-25 16:16:08,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:16:08,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:16:08,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:08,011 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:08,066 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-08-25 16:16:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:16:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-25 16:16:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:08,068 INFO L225 Difference]: With dead ends: 114 [2021-08-25 16:16:08,068 INFO L226 Difference]: Without dead ends: 109 [2021-08-25 16:16:08,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-25 16:16:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-08-25 16:16:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-08-25 16:16:08,082 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-08-25 16:16:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:08,083 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-08-25 16:16:08,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,083 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-08-25 16:16:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-25 16:16:08,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:08,084 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:08,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:08,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:08,301 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-08-25 16:16:08,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:08,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111359960] [2021-08-25 16:16:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:08,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-25 16:16:08,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:08,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111359960] [2021-08-25 16:16:08,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111359960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:08,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525378573] [2021-08-25 16:16:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:08,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:08,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:08,330 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) [2021-08-25 16:16:08,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 16:16:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:16:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-25 16:16:08,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525378573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:08,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 16:16:08,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-25 16:16:08,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135400222] [2021-08-25 16:16:08,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:08,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:08,553 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:08,617 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-08-25 16:16:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-25 16:16:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:08,619 INFO L225 Difference]: With dead ends: 162 [2021-08-25 16:16:08,619 INFO L226 Difference]: Without dead ends: 96 [2021-08-25 16:16:08,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-25 16:16:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-08-25 16:16:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 89 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-08-25 16:16:08,624 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-08-25 16:16:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:08,624 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-08-25 16:16:08,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-08-25 16:16:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-25 16:16:08,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:08,625 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:08,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:08,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:08,833 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:08,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-08-25 16:16:08,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:08,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4514663] [2021-08-25 16:16:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:08,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:08,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:08,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299913028] [2021-08-25 16:16:08,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:08,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:08,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:08,852 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) [2021-08-25 16:16:08,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 16:16:08,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:08,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:08,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:16:08,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-25 16:16:09,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:09,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4514663] [2021-08-25 16:16:09,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:09,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299913028] [2021-08-25 16:16:09,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299913028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:09,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:09,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:16:09,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270046681] [2021-08-25 16:16:09,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:16:09,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:09,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:16:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:09,115 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:09,129 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-08-25 16:16:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:16:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-25 16:16:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:09,130 INFO L225 Difference]: With dead ends: 174 [2021-08-25 16:16:09,130 INFO L226 Difference]: Without dead ends: 93 [2021-08-25 16:16:09,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-25 16:16:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-08-25 16:16:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 91 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-08-25 16:16:09,134 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-08-25 16:16:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:09,134 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-08-25 16:16:09,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-08-25 16:16:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-25 16:16:09,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:09,135 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:09,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:09,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:09,353 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-08-25 16:16:09,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:09,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023635271] [2021-08-25 16:16:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:09,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-25 16:16:09,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:09,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023635271] [2021-08-25 16:16:09,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023635271] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:09,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:16:09,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 16:16:09,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094690947] [2021-08-25 16:16:09,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:16:09,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:16:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:09,390 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:09,435 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-08-25 16:16:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:16:09,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-25 16:16:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:09,436 INFO L225 Difference]: With dead ends: 177 [2021-08-25 16:16:09,436 INFO L226 Difference]: Without dead ends: 108 [2021-08-25 16:16:09,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-25 16:16:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-08-25 16:16:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-08-25 16:16:09,449 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-08-25 16:16:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:09,450 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-08-25 16:16:09,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-08-25 16:16:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-25 16:16:09,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:09,455 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:09,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 16:16:09,455 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:09,455 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-08-25 16:16:09,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:09,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391243610] [2021-08-25 16:16:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:09,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:09,481 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:09,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019599561] [2021-08-25 16:16:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:09,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:09,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:09,492 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) [2021-08-25 16:16:09,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 16:16:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:09,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:16:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:16:09,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:09,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391243610] [2021-08-25 16:16:09,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:09,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019599561] [2021-08-25 16:16:09,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019599561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:09,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:09,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:16:09,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434633173] [2021-08-25 16:16:09,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:09,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:09,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:09,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:09,737 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:09,757 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-08-25 16:16:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-25 16:16:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:09,758 INFO L225 Difference]: With dead ends: 158 [2021-08-25 16:16:09,758 INFO L226 Difference]: Without dead ends: 86 [2021-08-25 16:16:09,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-25 16:16:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-08-25 16:16:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-08-25 16:16:09,761 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-08-25 16:16:09,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:09,761 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-08-25 16:16:09,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,761 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-08-25 16:16:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-25 16:16:09,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:09,761 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:09,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:09,970 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 [2021-08-25 16:16:09,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:09,971 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-08-25 16:16:09,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:09,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139476726] [2021-08-25 16:16:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:09,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:09,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:09,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957992771] [2021-08-25 16:16:09,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:09,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:09,983 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) [2021-08-25 16:16:09,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 16:16:10,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:10,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 16:16:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:16:10,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:10,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139476726] [2021-08-25 16:16:10,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:10,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957992771] [2021-08-25 16:16:10,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957992771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:10,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:10,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 16:16:10,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698076568] [2021-08-25 16:16:10,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:16:10,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:16:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:10,275 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:10,294 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-08-25 16:16:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:16:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-25 16:16:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:10,298 INFO L225 Difference]: With dead ends: 160 [2021-08-25 16:16:10,298 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 16:16:10,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 16:16:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-25 16:16:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.197674418604651) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-08-25 16:16:10,303 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2021-08-25 16:16:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:10,304 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-08-25 16:16:10,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-08-25 16:16:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-25 16:16:10,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:10,304 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:10,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:10,505 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 [2021-08-25 16:16:10,505 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:10,505 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2021-08-25 16:16:10,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:10,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387140220] [2021-08-25 16:16:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:10,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:10,513 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:10,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521807680] [2021-08-25 16:16:10,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:10,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:10,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:10,514 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) [2021-08-25 16:16:10,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 16:16:10,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-25 16:16:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:16:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-08-25 16:16:10,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:10,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387140220] [2021-08-25 16:16:10,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:10,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521807680] [2021-08-25 16:16:10,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521807680] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:10,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:16:10,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 16:16:10,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263101679] [2021-08-25 16:16:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:16:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:16:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:10,803 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:10,823 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-08-25 16:16:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:16:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-25 16:16:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:10,824 INFO L225 Difference]: With dead ends: 116 [2021-08-25 16:16:10,824 INFO L226 Difference]: Without dead ends: 68 [2021-08-25 16:16:10,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-25 16:16:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2021-08-25 16:16:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-08-25 16:16:10,826 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2021-08-25 16:16:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:10,826 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-08-25 16:16:10,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-08-25 16:16:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-25 16:16:10,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:10,827 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:10,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:11,041 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 [2021-08-25 16:16:11,041 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:11,041 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2021-08-25 16:16:11,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:11,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342820777] [2021-08-25 16:16:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:11,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:11,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:11,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146526692] [2021-08-25 16:16:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:11,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:11,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:11,050 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) [2021-08-25 16:16:11,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-25 16:16:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 16:16:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:16:11,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:11,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342820777] [2021-08-25 16:16:11,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:11,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146526692] [2021-08-25 16:16:11,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146526692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:11,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:11,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 16:16:11,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052712933] [2021-08-25 16:16:11,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 16:16:11,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 16:16:11,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:11,363 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:11,383 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-08-25 16:16:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 16:16:11,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-25 16:16:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:11,384 INFO L225 Difference]: With dead ends: 106 [2021-08-25 16:16:11,384 INFO L226 Difference]: Without dead ends: 62 [2021-08-25 16:16:11,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-25 16:16:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-08-25 16:16:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-08-25 16:16:11,386 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2021-08-25 16:16:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:11,386 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-08-25 16:16:11,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-08-25 16:16:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-25 16:16:11,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:11,387 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:11,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:11,602 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 [2021-08-25 16:16:11,602 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2021-08-25 16:16:11,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:11,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517152601] [2021-08-25 16:16:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:11,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:11,610 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:11,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367791869] [2021-08-25 16:16:11,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:11,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:11,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:11,611 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) [2021-08-25 16:16:11,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-25 16:16:11,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:11,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:11,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 16:16:11,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:16:11,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:11,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517152601] [2021-08-25 16:16:11,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:11,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367791869] [2021-08-25 16:16:11,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367791869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:11,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:11,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 16:16:11,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36760408] [2021-08-25 16:16:11,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 16:16:11,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 16:16:11,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:11,981 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:12,003 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-08-25 16:16:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 16:16:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-25 16:16:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:12,004 INFO L225 Difference]: With dead ends: 108 [2021-08-25 16:16:12,004 INFO L226 Difference]: Without dead ends: 64 [2021-08-25 16:16:12,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-25 16:16:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-08-25 16:16:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-08-25 16:16:12,006 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2021-08-25 16:16:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:12,007 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-08-25 16:16:12,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-08-25 16:16:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-25 16:16:12,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:12,007 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:12,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:12,220 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 [2021-08-25 16:16:12,220 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2021-08-25 16:16:12,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:12,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075866356] [2021-08-25 16:16:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:12,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:12,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:12,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704525267] [2021-08-25 16:16:12,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:12,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:12,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:12,230 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) [2021-08-25 16:16:12,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-25 16:16:12,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-25 16:16:12,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:16:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-25 16:16:12,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:12,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075866356] [2021-08-25 16:16:12,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:12,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704525267] [2021-08-25 16:16:12,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704525267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:12,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:12,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-25 16:16:12,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143482519] [2021-08-25 16:16:12,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:16:12,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:16:12,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:12,548 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:12,561 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-08-25 16:16:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:16:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-25 16:16:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:12,562 INFO L225 Difference]: With dead ends: 82 [2021-08-25 16:16:12,562 INFO L226 Difference]: Without dead ends: 66 [2021-08-25 16:16:12,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-25 16:16:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-08-25 16:16:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-08-25 16:16:12,564 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2021-08-25 16:16:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:12,564 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-08-25 16:16:12,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-08-25 16:16:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-25 16:16:12,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:12,565 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:12,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:12,781 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 [2021-08-25 16:16:12,782 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:12,782 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2021-08-25 16:16:12,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:12,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617121959] [2021-08-25 16:16:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:12,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:12,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:12,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801146188] [2021-08-25 16:16:12,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:12,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:12,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:12,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:12,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-25 16:16:13,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:16:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:16:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-25 16:16:13,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:13,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617121959] [2021-08-25 16:16:13,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:13,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801146188] [2021-08-25 16:16:13,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801146188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:13,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:13,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:16:13,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526649786] [2021-08-25 16:16:13,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:16:13,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:13,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:16:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:13,153 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:13,197 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2021-08-25 16:16:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:16:13,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-25 16:16:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:13,197 INFO L225 Difference]: With dead ends: 117 [2021-08-25 16:16:13,198 INFO L226 Difference]: Without dead ends: 77 [2021-08-25 16:16:13,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-25 16:16:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-08-25 16:16:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-08-25 16:16:13,200 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2021-08-25 16:16:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:13,200 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-08-25 16:16:13,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-08-25 16:16:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-25 16:16:13,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:13,201 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:13,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:13,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:13,417 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2021-08-25 16:16:13,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:13,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290220577] [2021-08-25 16:16:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:13,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:13,425 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:13,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086103304] [2021-08-25 16:16:13,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:16:13,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:13,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:13,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:13,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-25 16:16:13,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-25 16:16:13,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:16:13,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-08-25 16:16:13,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:13,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290220577] [2021-08-25 16:16:13,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:13,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086103304] [2021-08-25 16:16:13,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086103304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:13,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:13,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:16:13,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513360021] [2021-08-25 16:16:13,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:16:13,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:13,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:16:13,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:13,868 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:13,934 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-08-25 16:16:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:16:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-25 16:16:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:13,935 INFO L225 Difference]: With dead ends: 132 [2021-08-25 16:16:13,935 INFO L226 Difference]: Without dead ends: 86 [2021-08-25 16:16:13,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-25 16:16:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-08-25 16:16:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-08-25 16:16:13,939 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2021-08-25 16:16:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:13,940 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-08-25 16:16:13,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-08-25 16:16:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-25 16:16:13,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:13,940 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:13,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:14,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-25 16:16:14,157 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2021-08-25 16:16:14,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:14,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665756895] [2021-08-25 16:16:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:14,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:14,177 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:14,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545922252] [2021-08-25 16:16:14,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:16:14,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:14,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:14,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:14,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-25 16:16:14,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-25 16:16:14,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:14,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:16:14,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-08-25 16:16:14,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:14,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665756895] [2021-08-25 16:16:14,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:14,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545922252] [2021-08-25 16:16:14,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545922252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:14,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:14,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:16:14,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539260501] [2021-08-25 16:16:14,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:16:14,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:16:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:14,696 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:14,713 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-08-25 16:16:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:16:14,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-25 16:16:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:14,713 INFO L225 Difference]: With dead ends: 108 [2021-08-25 16:16:14,713 INFO L226 Difference]: Without dead ends: 86 [2021-08-25 16:16:14,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-25 16:16:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-08-25 16:16:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-08-25 16:16:14,716 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2021-08-25 16:16:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:14,716 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-08-25 16:16:14,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-08-25 16:16:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-25 16:16:14,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:14,717 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:14,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:14,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-25 16:16:14,925 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2021-08-25 16:16:14,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:14,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041342331] [2021-08-25 16:16:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:14,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:14,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:14,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481312694] [2021-08-25 16:16:14,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:16:14,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:14,935 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:14,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-25 16:16:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 16:16:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-08-25 16:16:15,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:15,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041342331] [2021-08-25 16:16:15,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:15,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481312694] [2021-08-25 16:16:15,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481312694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:15,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:15,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 16:16:15,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782788744] [2021-08-25 16:16:15,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 16:16:15,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 16:16:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:15,521 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:15,551 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-08-25 16:16:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 16:16:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-08-25 16:16:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:15,553 INFO L225 Difference]: With dead ends: 154 [2021-08-25 16:16:15,553 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 16:16:15,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 16:16:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-25 16:16:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 86 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-08-25 16:16:15,556 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2021-08-25 16:16:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:15,556 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-08-25 16:16:15,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-08-25 16:16:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-25 16:16:15,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:15,557 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:15,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:15,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:15,769 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2021-08-25 16:16:15,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:15,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069525983] [2021-08-25 16:16:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:15,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:15,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:15,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599962644] [2021-08-25 16:16:15,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:15,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:15,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:15,785 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:15,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-25 16:16:16,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:16,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:16,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 16:16:16,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-08-25 16:16:16,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:16,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069525983] [2021-08-25 16:16:16,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:16,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599962644] [2021-08-25 16:16:16,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599962644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:16,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:16,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 16:16:16,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645169280] [2021-08-25 16:16:16,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 16:16:16,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 16:16:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:16,371 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:16,394 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-08-25 16:16:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 16:16:16,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-25 16:16:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:16,400 INFO L225 Difference]: With dead ends: 156 [2021-08-25 16:16:16,400 INFO L226 Difference]: Without dead ends: 90 [2021-08-25 16:16:16,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-25 16:16:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-08-25 16:16:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-08-25 16:16:16,402 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2021-08-25 16:16:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:16,402 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-08-25 16:16:16,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-08-25 16:16:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-25 16:16:16,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:16,403 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:16,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:16,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:16,612 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:16,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2021-08-25 16:16:16,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:16,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248254330] [2021-08-25 16:16:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:16,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:16,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:16,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499535825] [2021-08-25 16:16:16,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:16,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:16,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:16,633 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:16,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-25 16:16:17,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-25 16:16:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:17,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:16:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-08-25 16:16:17,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:17,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248254330] [2021-08-25 16:16:17,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:17,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499535825] [2021-08-25 16:16:17,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499535825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:17,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:17,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:16:17,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141994280] [2021-08-25 16:16:17,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:16:17,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:16:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:17,292 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:17,351 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-08-25 16:16:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:16:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-25 16:16:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:17,352 INFO L225 Difference]: With dead ends: 153 [2021-08-25 16:16:17,352 INFO L226 Difference]: Without dead ends: 104 [2021-08-25 16:16:17,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-25 16:16:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-08-25 16:16:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-08-25 16:16:17,354 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2021-08-25 16:16:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:17,355 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-08-25 16:16:17,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-08-25 16:16:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-25 16:16:17,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:17,355 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:17,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:17,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:17,557 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2021-08-25 16:16:17,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:17,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843618255] [2021-08-25 16:16:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:17,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:17,568 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:17,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157958284] [2021-08-25 16:16:17,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:17,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:17,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:17,572 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:17,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-25 16:16:17,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:16:17,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:17,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:16:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-08-25 16:16:18,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:18,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843618255] [2021-08-25 16:16:18,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:18,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157958284] [2021-08-25 16:16:18,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157958284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:18,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:18,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:16:18,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583517249] [2021-08-25 16:16:18,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:18,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:18,138 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:18,201 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2021-08-25 16:16:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-08-25 16:16:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:18,202 INFO L225 Difference]: With dead ends: 173 [2021-08-25 16:16:18,202 INFO L226 Difference]: Without dead ends: 110 [2021-08-25 16:16:18,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-25 16:16:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-08-25 16:16:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1037735849056605) internal successors, (117), 106 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-08-25 16:16:18,205 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 97 [2021-08-25 16:16:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:18,205 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-08-25 16:16:18,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-08-25 16:16:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-25 16:16:18,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:18,213 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:18,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:18,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-25 16:16:18,433 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:18,433 INFO L82 PathProgramCache]: Analyzing trace with hash -983224722, now seen corresponding path program 11 times [2021-08-25 16:16:18,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:18,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253812350] [2021-08-25 16:16:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:18,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:18,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:18,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60271331] [2021-08-25 16:16:18,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:16:18,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:18,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:18,446 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:18,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-25 16:16:18,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-25 16:16:18,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:18,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 16:16:18,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-08-25 16:16:19,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:19,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253812350] [2021-08-25 16:16:19,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:19,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60271331] [2021-08-25 16:16:19,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60271331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:19,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:19,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 16:16:19,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748003795] [2021-08-25 16:16:19,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:16:19,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:16:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:19,155 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:19,234 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2021-08-25 16:16:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:16:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-25 16:16:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:19,235 INFO L225 Difference]: With dead ends: 188 [2021-08-25 16:16:19,235 INFO L226 Difference]: Without dead ends: 119 [2021-08-25 16:16:19,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-25 16:16:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-08-25 16:16:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-08-25 16:16:19,238 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 106 [2021-08-25 16:16:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:19,239 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-08-25 16:16:19,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-08-25 16:16:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-25 16:16:19,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:19,240 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:19,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:19,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-25 16:16:19,449 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash -700509419, now seen corresponding path program 12 times [2021-08-25 16:16:19,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:19,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739655236] [2021-08-25 16:16:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:19,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:19,457 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:19,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543218359] [2021-08-25 16:16:19,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:16:19,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:19,458 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:19,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-25 16:16:20,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-25 16:16:20,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:20,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:16:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-25 16:16:20,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:20,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739655236] [2021-08-25 16:16:20,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:20,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543218359] [2021-08-25 16:16:20,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543218359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:20,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:20,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:16:20,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493978203] [2021-08-25 16:16:20,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:16:20,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:16:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:20,333 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:20,352 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2021-08-25 16:16:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:16:20,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-25 16:16:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:20,353 INFO L225 Difference]: With dead ends: 150 [2021-08-25 16:16:20,354 INFO L226 Difference]: Without dead ends: 119 [2021-08-25 16:16:20,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-25 16:16:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-08-25 16:16:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:20,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2021-08-25 16:16:20,357 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2021-08-25 16:16:20,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:20,357 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2021-08-25 16:16:20,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:20,358 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2021-08-25 16:16:20,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-08-25 16:16:20,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:20,358 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:20,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:20,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:20,567 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash -111816429, now seen corresponding path program 13 times [2021-08-25 16:16:20,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:20,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712937638] [2021-08-25 16:16:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:20,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:20,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:20,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224908800] [2021-08-25 16:16:20,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:16:20,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:20,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:20,579 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:20,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-25 16:16:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:21,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-25 16:16:21,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-08-25 16:16:21,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:21,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712937638] [2021-08-25 16:16:21,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:21,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224908800] [2021-08-25 16:16:21,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224908800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:21,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:21,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-25 16:16:21,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50075198] [2021-08-25 16:16:21,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-25 16:16:21,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-25 16:16:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-25 16:16:21,360 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:21,394 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2021-08-25 16:16:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 16:16:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-08-25 16:16:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:21,395 INFO L225 Difference]: With dead ends: 216 [2021-08-25 16:16:21,395 INFO L226 Difference]: Without dead ends: 121 [2021-08-25 16:16:21,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-25 16:16:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-25 16:16:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-08-25 16:16:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 119 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2021-08-25 16:16:21,398 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 117 [2021-08-25 16:16:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:21,398 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2021-08-25 16:16:21,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2021-08-25 16:16:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-08-25 16:16:21,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:21,399 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:21,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:21,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:21,609 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1032300881, now seen corresponding path program 14 times [2021-08-25 16:16:21,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:21,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521416439] [2021-08-25 16:16:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:21,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:21,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:21,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993100501] [2021-08-25 16:16:21,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:21,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:21,621 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:21,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-25 16:16:22,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:22,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:22,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 16:16:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-08-25 16:16:22,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:22,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521416439] [2021-08-25 16:16:22,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:22,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993100501] [2021-08-25 16:16:22,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993100501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:22,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:22,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-08-25 16:16:22,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077777844] [2021-08-25 16:16:22,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 16:16:22,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 16:16:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-25 16:16:22,458 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:22,487 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2021-08-25 16:16:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-25 16:16:22,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-08-25 16:16:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:22,488 INFO L225 Difference]: With dead ends: 218 [2021-08-25 16:16:22,488 INFO L226 Difference]: Without dead ends: 123 [2021-08-25 16:16:22,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-25 16:16:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-25 16:16:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-08-25 16:16:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0909090909090908) internal successors, (132), 121 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2021-08-25 16:16:22,498 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 119 [2021-08-25 16:16:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:22,498 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2021-08-25 16:16:22,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2021-08-25 16:16:22,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-25 16:16:22,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:22,499 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:22,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:22,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-25 16:16:22,713 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1017408015, now seen corresponding path program 15 times [2021-08-25 16:16:22,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:22,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264972091] [2021-08-25 16:16:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:22,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:22,725 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:22,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491360753] [2021-08-25 16:16:22,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:22,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:22,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:22,727 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:22,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-25 16:16:23,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-25 16:16:23,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:16:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-08-25 16:16:23,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:23,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264972091] [2021-08-25 16:16:23,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:23,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491360753] [2021-08-25 16:16:23,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491360753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:23,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:23,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:16:23,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502916394] [2021-08-25 16:16:23,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:16:23,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:16:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:23,791 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:23,849 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2021-08-25 16:16:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:16:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-08-25 16:16:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:23,849 INFO L225 Difference]: With dead ends: 206 [2021-08-25 16:16:23,850 INFO L226 Difference]: Without dead ends: 137 [2021-08-25 16:16:23,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:23,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-25 16:16:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-08-25 16:16:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 130 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-08-25 16:16:23,852 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 121 [2021-08-25 16:16:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:23,853 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-08-25 16:16:23,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-08-25 16:16:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-25 16:16:23,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:23,854 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:23,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-25 16:16:24,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-25 16:16:24,054 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:24,054 INFO L82 PathProgramCache]: Analyzing trace with hash 171712334, now seen corresponding path program 16 times [2021-08-25 16:16:24,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:24,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511790726] [2021-08-25 16:16:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:24,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:24,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:24,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093180328] [2021-08-25 16:16:24,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:24,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:24,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:24,065 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:24,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-25 16:16:24,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:16:24,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 16:16:24,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 53 proven. 57 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-08-25 16:16:24,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:24,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511790726] [2021-08-25 16:16:24,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:24,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093180328] [2021-08-25 16:16:24,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093180328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:24,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:24,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 16:16:24,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477670595] [2021-08-25 16:16:24,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 16:16:24,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 16:16:24,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:24,910 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:25,004 INFO L93 Difference]: Finished difference Result 229 states and 257 transitions. [2021-08-25 16:16:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 16:16:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-08-25 16:16:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:25,005 INFO L225 Difference]: With dead ends: 229 [2021-08-25 16:16:25,005 INFO L226 Difference]: Without dead ends: 143 [2021-08-25 16:16:25,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:25,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-25 16:16:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-08-25 16:16:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1007194244604317) internal successors, (153), 139 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2021-08-25 16:16:25,009 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 130 [2021-08-25 16:16:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:25,009 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2021-08-25 16:16:25,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2021-08-25 16:16:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-08-25 16:16:25,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:25,010 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 7, 7, 7, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:25,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-25 16:16:25,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-25 16:16:25,217 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1108040979, now seen corresponding path program 17 times [2021-08-25 16:16:25,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:25,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672868550] [2021-08-25 16:16:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:25,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:25,229 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:25,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556971519] [2021-08-25 16:16:25,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:16:25,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:25,236 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:25,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-25 16:16:25,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-25 16:16:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:25,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 16:16:25,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-08-25 16:16:26,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:26,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672868550] [2021-08-25 16:16:26,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:26,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556971519] [2021-08-25 16:16:26,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556971519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:26,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:26,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 16:16:26,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648281830] [2021-08-25 16:16:26,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 16:16:26,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 16:16:26,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:26,322 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:26,411 INFO L93 Difference]: Finished difference Result 244 states and 272 transitions. [2021-08-25 16:16:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 16:16:26,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-08-25 16:16:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:26,412 INFO L225 Difference]: With dead ends: 244 [2021-08-25 16:16:26,412 INFO L226 Difference]: Without dead ends: 152 [2021-08-25 16:16:26,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-25 16:16:26,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2021-08-25 16:16:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0945945945945945) internal successors, (162), 148 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2021-08-25 16:16:26,415 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 139 [2021-08-25 16:16:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:26,416 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2021-08-25 16:16:26,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2021-08-25 16:16:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-25 16:16:26,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:26,417 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:26,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-25 16:16:26,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-25 16:16:26,622 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1198235730, now seen corresponding path program 18 times [2021-08-25 16:16:26,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:26,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252613651] [2021-08-25 16:16:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:26,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:26,632 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:26,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492582251] [2021-08-25 16:16:26,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:16:26,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:26,633 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:26,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-25 16:16:27,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-25 16:16:27,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:16:27,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-08-25 16:16:27,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:27,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252613651] [2021-08-25 16:16:27,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:27,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492582251] [2021-08-25 16:16:27,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492582251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:27,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:27,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:16:27,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933626983] [2021-08-25 16:16:27,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:27,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:27,736 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:27,751 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2021-08-25 16:16:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:27,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-08-25 16:16:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:27,761 INFO L225 Difference]: With dead ends: 192 [2021-08-25 16:16:27,761 INFO L226 Difference]: Without dead ends: 152 [2021-08-25 16:16:27,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-25 16:16:27,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-08-25 16:16:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2021-08-25 16:16:27,765 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 148 [2021-08-25 16:16:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:27,769 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2021-08-25 16:16:27,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2021-08-25 16:16:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-08-25 16:16:27,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:27,770 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:27,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-25 16:16:27,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:27,972 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash -747380432, now seen corresponding path program 19 times [2021-08-25 16:16:27,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:27,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993069021] [2021-08-25 16:16:27,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:27,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:27,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:27,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968589581] [2021-08-25 16:16:27,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:16:27,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:27,982 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:27,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-25 16:16:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:28,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-25 16:16:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-08-25 16:16:29,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:29,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993069021] [2021-08-25 16:16:29,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:29,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968589581] [2021-08-25 16:16:29,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968589581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:29,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:29,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-08-25 16:16:29,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599669004] [2021-08-25 16:16:29,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-25 16:16:29,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:29,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-25 16:16:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-25 16:16:29,040 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:29,068 INFO L93 Difference]: Finished difference Result 278 states and 304 transitions. [2021-08-25 16:16:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-25 16:16:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-08-25 16:16:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:29,077 INFO L225 Difference]: With dead ends: 278 [2021-08-25 16:16:29,077 INFO L226 Difference]: Without dead ends: 154 [2021-08-25 16:16:29,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-25 16:16:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-25 16:16:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-08-25 16:16:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2021-08-25 16:16:29,081 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 150 [2021-08-25 16:16:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:29,081 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2021-08-25 16:16:29,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2021-08-25 16:16:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-08-25 16:16:29,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:29,082 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:29,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:29,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:29,301 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:29,302 INFO L82 PathProgramCache]: Analyzing trace with hash 881756338, now seen corresponding path program 20 times [2021-08-25 16:16:29,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:29,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602619791] [2021-08-25 16:16:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:29,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:29,312 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:29,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658847785] [2021-08-25 16:16:29,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:29,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:29,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:29,313 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:29,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-25 16:16:30,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:30,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-25 16:16:30,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-08-25 16:16:30,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:30,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602619791] [2021-08-25 16:16:30,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:30,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658847785] [2021-08-25 16:16:30,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658847785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:30,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:30,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-08-25 16:16:30,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614661882] [2021-08-25 16:16:30,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-25 16:16:30,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-25 16:16:30,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-25 16:16:30,472 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:30,509 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2021-08-25 16:16:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-25 16:16:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-08-25 16:16:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:30,510 INFO L225 Difference]: With dead ends: 280 [2021-08-25 16:16:30,510 INFO L226 Difference]: Without dead ends: 156 [2021-08-25 16:16:30,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-25 16:16:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-25 16:16:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-08-25 16:16:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0909090909090908) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2021-08-25 16:16:30,515 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 152 [2021-08-25 16:16:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:30,515 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2021-08-25 16:16:30,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2021-08-25 16:16:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-25 16:16:30,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:30,517 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:30,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:30,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-25 16:16:30,717 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:30,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1180870732, now seen corresponding path program 21 times [2021-08-25 16:16:30,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:30,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598686959] [2021-08-25 16:16:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:30,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:30,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:30,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110172011] [2021-08-25 16:16:30,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:30,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:30,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:30,730 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:30,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-25 16:16:32,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-25 16:16:32,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:32,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 16:16:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2021-08-25 16:16:32,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:32,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598686959] [2021-08-25 16:16:32,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:32,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110172011] [2021-08-25 16:16:32,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110172011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:32,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:32,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 16:16:32,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994016862] [2021-08-25 16:16:32,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:16:32,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:16:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:32,473 INFO L87 Difference]: Start difference. First operand 155 states and 168 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:32,492 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2021-08-25 16:16:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:16:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-08-25 16:16:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:32,493 INFO L225 Difference]: With dead ends: 198 [2021-08-25 16:16:32,493 INFO L226 Difference]: Without dead ends: 158 [2021-08-25 16:16:32,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-25 16:16:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-08-25 16:16:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0897435897435896) internal successors, (170), 156 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2021-08-25 16:16:32,496 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 154 [2021-08-25 16:16:32,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:32,497 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2021-08-25 16:16:32,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:32,497 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2021-08-25 16:16:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-08-25 16:16:32,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:32,497 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 11, 11, 11, 8, 8, 8, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:32,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:32,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:32,706 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:32,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:32,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1239486538, now seen corresponding path program 22 times [2021-08-25 16:16:32,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:32,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231640935] [2021-08-25 16:16:32,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:32,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:32,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:32,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976177769] [2021-08-25 16:16:32,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:32,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:32,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:32,717 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:32,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-25 16:16:33,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:16:33,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 16:16:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-08-25 16:16:33,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:33,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231640935] [2021-08-25 16:16:33,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:33,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976177769] [2021-08-25 16:16:33,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976177769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:33,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:33,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 16:16:33,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280905371] [2021-08-25 16:16:33,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 16:16:33,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:33,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 16:16:33,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:33,862 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:33,976 INFO L93 Difference]: Finished difference Result 271 states and 299 transitions. [2021-08-25 16:16:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 16:16:33,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-08-25 16:16:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:33,977 INFO L225 Difference]: With dead ends: 271 [2021-08-25 16:16:33,977 INFO L226 Difference]: Without dead ends: 169 [2021-08-25 16:16:33,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-25 16:16:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2021-08-25 16:16:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.084848484848485) internal successors, (179), 165 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2021-08-25 16:16:33,981 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 156 [2021-08-25 16:16:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:33,981 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2021-08-25 16:16:33,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2021-08-25 16:16:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-25 16:16:33,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:33,982 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 12, 12, 9, 9, 9, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:34,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:34,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:34,197 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1437935237, now seen corresponding path program 23 times [2021-08-25 16:16:34,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:34,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68504019] [2021-08-25 16:16:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:34,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:34,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:34,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265486706] [2021-08-25 16:16:34,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:16:34,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:34,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:34,210 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:34,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-25 16:16:35,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-25 16:16:35,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:35,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 16:16:35,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2021-08-25 16:16:35,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:35,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68504019] [2021-08-25 16:16:35,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:35,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265486706] [2021-08-25 16:16:35,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265486706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:35,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:35,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 16:16:35,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15719961] [2021-08-25 16:16:35,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 16:16:35,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 16:16:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:35,851 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:35,964 INFO L93 Difference]: Finished difference Result 286 states and 314 transitions. [2021-08-25 16:16:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 16:16:35,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-08-25 16:16:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:35,965 INFO L225 Difference]: With dead ends: 286 [2021-08-25 16:16:35,965 INFO L226 Difference]: Without dead ends: 178 [2021-08-25 16:16:35,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-25 16:16:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2021-08-25 16:16:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0804597701149425) internal successors, (188), 174 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 188 transitions. [2021-08-25 16:16:35,969 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 188 transitions. Word has length 165 [2021-08-25 16:16:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:35,969 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 188 transitions. [2021-08-25 16:16:35,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 188 transitions. [2021-08-25 16:16:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-08-25 16:16:35,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:35,970 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 10, 10, 10, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:35,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:36,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-25 16:16:36,190 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash -595026922, now seen corresponding path program 24 times [2021-08-25 16:16:36,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:36,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611770820] [2021-08-25 16:16:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:36,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:36,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:36,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635675139] [2021-08-25 16:16:36,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:16:36,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:36,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:36,203 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:36,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-25 16:16:38,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-25 16:16:38,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:16:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-08-25 16:16:38,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:38,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611770820] [2021-08-25 16:16:38,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:38,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635675139] [2021-08-25 16:16:38,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635675139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:38,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:38,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:16:38,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355768307] [2021-08-25 16:16:38,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:38,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:38,497 INFO L87 Difference]: Start difference. First operand 175 states and 188 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:38,586 INFO L93 Difference]: Finished difference Result 293 states and 323 transitions. [2021-08-25 16:16:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-08-25 16:16:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:38,587 INFO L225 Difference]: With dead ends: 293 [2021-08-25 16:16:38,587 INFO L226 Difference]: Without dead ends: 190 [2021-08-25 16:16:38,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-25 16:16:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2021-08-25 16:16:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.092896174863388) internal successors, (200), 183 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2021-08-25 16:16:38,591 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 174 [2021-08-25 16:16:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:38,592 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2021-08-25 16:16:38,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2021-08-25 16:16:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-08-25 16:16:38,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:38,593 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 10, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:38,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:38,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-25 16:16:38,805 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash 905042599, now seen corresponding path program 25 times [2021-08-25 16:16:38,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:38,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718555900] [2021-08-25 16:16:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:38,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:38,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:38,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306684723] [2021-08-25 16:16:38,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:16:38,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:38,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:38,816 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:38,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-25 16:16:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:39,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 16:16:39,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-08-25 16:16:40,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:40,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718555900] [2021-08-25 16:16:40,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:40,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306684723] [2021-08-25 16:16:40,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306684723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:40,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:40,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-08-25 16:16:40,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079448853] [2021-08-25 16:16:40,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-25 16:16:40,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-25 16:16:40,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-25 16:16:40,253 INFO L87 Difference]: Start difference. First operand 184 states and 200 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:40,298 INFO L93 Difference]: Finished difference Result 340 states and 372 transitions. [2021-08-25 16:16:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-25 16:16:40,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-08-25 16:16:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:40,299 INFO L225 Difference]: With dead ends: 340 [2021-08-25 16:16:40,299 INFO L226 Difference]: Without dead ends: 187 [2021-08-25 16:16:40,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-25 16:16:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-25 16:16:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-08-25 16:16:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0918918918918918) internal successors, (202), 185 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 202 transitions. [2021-08-25 16:16:40,303 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 202 transitions. Word has length 183 [2021-08-25 16:16:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:40,304 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 202 transitions. [2021-08-25 16:16:40,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 202 transitions. [2021-08-25 16:16:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-08-25 16:16:40,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:40,305 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 10, 10, 10, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:40,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:40,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-25 16:16:40,521 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:40,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1557550235, now seen corresponding path program 26 times [2021-08-25 16:16:40,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:40,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390193268] [2021-08-25 16:16:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:40,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:40,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:40,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855742067] [2021-08-25 16:16:40,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:40,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:40,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:40,533 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:40,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-25 16:16:41,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:41,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-25 16:16:41,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-08-25 16:16:42,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:42,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390193268] [2021-08-25 16:16:42,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:42,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855742067] [2021-08-25 16:16:42,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855742067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:42,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:42,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-08-25 16:16:42,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144395252] [2021-08-25 16:16:42,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-25 16:16:42,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-25 16:16:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-25 16:16:42,026 INFO L87 Difference]: Start difference. First operand 186 states and 202 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:42,080 INFO L93 Difference]: Finished difference Result 342 states and 374 transitions. [2021-08-25 16:16:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-25 16:16:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-08-25 16:16:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:42,081 INFO L225 Difference]: With dead ends: 342 [2021-08-25 16:16:42,081 INFO L226 Difference]: Without dead ends: 189 [2021-08-25 16:16:42,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-25 16:16:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-25 16:16:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-08-25 16:16:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0909090909090908) internal successors, (204), 187 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 204 transitions. [2021-08-25 16:16:42,085 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 204 transitions. Word has length 185 [2021-08-25 16:16:42,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:42,085 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 204 transitions. [2021-08-25 16:16:42,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 204 transitions. [2021-08-25 16:16:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-08-25 16:16:42,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:42,086 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 14, 14, 14, 10, 10, 10, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:42,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-25 16:16:42,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:42,287 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1582283613, now seen corresponding path program 27 times [2021-08-25 16:16:42,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:42,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111408165] [2021-08-25 16:16:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:42,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:42,298 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:42,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333648546] [2021-08-25 16:16:42,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:42,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:42,308 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:42,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-25 16:16:43,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-25 16:16:43,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 16:16:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1117 trivial. 0 not checked. [2021-08-25 16:16:44,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:44,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111408165] [2021-08-25 16:16:44,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:44,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333648546] [2021-08-25 16:16:44,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333648546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:44,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:44,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 16:16:44,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311454910] [2021-08-25 16:16:44,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 16:16:44,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 16:16:44,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:44,003 INFO L87 Difference]: Start difference. First operand 188 states and 204 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:44,022 INFO L93 Difference]: Finished difference Result 240 states and 261 transitions. [2021-08-25 16:16:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 16:16:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-08-25 16:16:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:44,028 INFO L225 Difference]: With dead ends: 240 [2021-08-25 16:16:44,028 INFO L226 Difference]: Without dead ends: 191 [2021-08-25 16:16:44,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-25 16:16:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-08-25 16:16:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.08994708994709) internal successors, (206), 189 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 206 transitions. [2021-08-25 16:16:44,031 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 206 transitions. Word has length 187 [2021-08-25 16:16:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:44,032 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 206 transitions. [2021-08-25 16:16:44,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 206 transitions. [2021-08-25 16:16:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-08-25 16:16:44,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:44,033 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 14, 14, 14, 10, 10, 10, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:44,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:44,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-25 16:16:44,254 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:44,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1905691743, now seen corresponding path program 28 times [2021-08-25 16:16:44,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:44,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137955411] [2021-08-25 16:16:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:44,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:44,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:44,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431471027] [2021-08-25 16:16:44,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:44,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:44,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:44,267 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:44,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-25 16:16:45,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:16:45,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-25 16:16:45,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 117 proven. 155 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2021-08-25 16:16:45,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:45,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137955411] [2021-08-25 16:16:45,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:45,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431471027] [2021-08-25 16:16:45,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431471027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:45,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:45,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-25 16:16:45,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943480861] [2021-08-25 16:16:45,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-25 16:16:45,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-25 16:16:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-25 16:16:45,840 INFO L87 Difference]: Start difference. First operand 190 states and 206 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:45,969 INFO L93 Difference]: Finished difference Result 324 states and 358 transitions. [2021-08-25 16:16:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 16:16:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-08-25 16:16:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:45,970 INFO L225 Difference]: With dead ends: 324 [2021-08-25 16:16:45,970 INFO L226 Difference]: Without dead ends: 199 [2021-08-25 16:16:45,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-25 16:16:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-25 16:16:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-08-25 16:16:45,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0858585858585859) internal successors, (215), 198 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 215 transitions. [2021-08-25 16:16:45,974 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 215 transitions. Word has length 189 [2021-08-25 16:16:45,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:45,974 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 215 transitions. [2021-08-25 16:16:45,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 215 transitions. [2021-08-25 16:16:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-08-25 16:16:45,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:45,975 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 11, 11, 11, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:45,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:46,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-25 16:16:46,189 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:46,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1239715394, now seen corresponding path program 29 times [2021-08-25 16:16:46,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:46,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594687877] [2021-08-25 16:16:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:46,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:46,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:46,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69787421] [2021-08-25 16:16:46,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:16:46,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:46,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:46,202 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:46,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-25 16:16:48,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-25 16:16:48,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:48,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 16:16:48,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 173 proven. 100 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2021-08-25 16:16:48,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:48,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594687877] [2021-08-25 16:16:48,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:48,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69787421] [2021-08-25 16:16:48,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69787421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:48,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:48,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 16:16:48,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074788303] [2021-08-25 16:16:48,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 16:16:48,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 16:16:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:48,791 INFO L87 Difference]: Start difference. First operand 199 states and 215 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:48,941 INFO L93 Difference]: Finished difference Result 361 states and 417 transitions. [2021-08-25 16:16:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 16:16:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-08-25 16:16:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:48,942 INFO L225 Difference]: With dead ends: 361 [2021-08-25 16:16:48,942 INFO L226 Difference]: Without dead ends: 244 [2021-08-25 16:16:48,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-25 16:16:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-08-25 16:16:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.131687242798354) internal successors, (275), 243 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 275 transitions. [2021-08-25 16:16:48,946 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 275 transitions. Word has length 198 [2021-08-25 16:16:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:48,947 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 275 transitions. [2021-08-25 16:16:48,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 275 transitions. [2021-08-25 16:16:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-08-25 16:16:48,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:48,948 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 16, 16, 11, 11, 11, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:48,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:49,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:49,161 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash 476497343, now seen corresponding path program 30 times [2021-08-25 16:16:49,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:49,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088000851] [2021-08-25 16:16:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:49,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:49,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:49,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633780776] [2021-08-25 16:16:49,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:16:49,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:49,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:49,177 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:49,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-25 16:16:50,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-25 16:16:50,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:50,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 16:16:50,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2021-08-25 16:16:51,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:51,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088000851] [2021-08-25 16:16:51,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:51,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633780776] [2021-08-25 16:16:51,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633780776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:51,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:51,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 16:16:51,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790702633] [2021-08-25 16:16:51,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 16:16:51,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 16:16:51,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:51,345 INFO L87 Difference]: Start difference. First operand 244 states and 275 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:51,371 INFO L93 Difference]: Finished difference Result 314 states and 355 transitions. [2021-08-25 16:16:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 16:16:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-08-25 16:16:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:51,372 INFO L225 Difference]: With dead ends: 314 [2021-08-25 16:16:51,372 INFO L226 Difference]: Without dead ends: 247 [2021-08-25 16:16:51,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-25 16:16:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2021-08-25 16:16:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.1306122448979592) internal successors, (277), 245 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 277 transitions. [2021-08-25 16:16:51,376 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 277 transitions. Word has length 243 [2021-08-25 16:16:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:51,376 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 277 transitions. [2021-08-25 16:16:51,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 277 transitions. [2021-08-25 16:16:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-08-25 16:16:51,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:51,377 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 16, 16, 11, 11, 11, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:51,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-25 16:16:51,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-25 16:16:51,585 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1241338301, now seen corresponding path program 31 times [2021-08-25 16:16:51,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:51,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085884613] [2021-08-25 16:16:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:51,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:51,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:51,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864542756] [2021-08-25 16:16:51,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:16:51,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:51,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:51,598 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:51,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-25 16:16:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-25 16:16:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2090 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2021-08-25 16:16:53,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:53,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085884613] [2021-08-25 16:16:53,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:53,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864542756] [2021-08-25 16:16:53,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864542756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:53,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:53,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-08-25 16:16:53,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824155332] [2021-08-25 16:16:53,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-25 16:16:53,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-25 16:16:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-25 16:16:53,486 INFO L87 Difference]: Start difference. First operand 246 states and 277 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:53,524 INFO L93 Difference]: Finished difference Result 460 states and 522 transitions. [2021-08-25 16:16:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-25 16:16:53,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-08-25 16:16:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:53,525 INFO L225 Difference]: With dead ends: 460 [2021-08-25 16:16:53,525 INFO L226 Difference]: Without dead ends: 249 [2021-08-25 16:16:53,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-25 16:16:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-25 16:16:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2021-08-25 16:16:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1295546558704452) internal successors, (279), 247 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 279 transitions. [2021-08-25 16:16:53,531 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 279 transitions. Word has length 245 [2021-08-25 16:16:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:53,532 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 279 transitions. [2021-08-25 16:16:53,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 279 transitions. [2021-08-25 16:16:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-08-25 16:16:53,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:53,533 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 17, 17, 11, 11, 11, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:53,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-25 16:16:53,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:53,741 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1058190853, now seen corresponding path program 32 times [2021-08-25 16:16:53,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:53,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688639271] [2021-08-25 16:16:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:53,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:53,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:53,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750802369] [2021-08-25 16:16:53,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:53,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:53,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:53,773 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:53,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-25 16:16:55,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:55,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:55,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-25 16:16:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2021-08-25 16:16:55,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:55,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688639271] [2021-08-25 16:16:55,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:55,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750802369] [2021-08-25 16:16:55,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750802369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:55,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:55,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-08-25 16:16:55,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447903353] [2021-08-25 16:16:55,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-25 16:16:55,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:55,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-25 16:16:55,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-25 16:16:55,778 INFO L87 Difference]: Start difference. First operand 248 states and 279 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:55,826 INFO L93 Difference]: Finished difference Result 462 states and 524 transitions. [2021-08-25 16:16:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-25 16:16:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-08-25 16:16:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:55,827 INFO L225 Difference]: With dead ends: 462 [2021-08-25 16:16:55,827 INFO L226 Difference]: Without dead ends: 251 [2021-08-25 16:16:55,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-25 16:16:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-25 16:16:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2021-08-25 16:16:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1285140562248996) internal successors, (281), 249 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2021-08-25 16:16:55,832 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 247 [2021-08-25 16:16:55,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:55,832 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2021-08-25 16:16:55,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2021-08-25 16:16:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-08-25 16:16:55,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:55,833 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 18, 18, 11, 11, 11, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:55,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-25 16:16:56,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:56,033 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1002449593, now seen corresponding path program 33 times [2021-08-25 16:16:56,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:56,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034072220] [2021-08-25 16:16:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:56,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:56,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:56,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368550657] [2021-08-25 16:16:56,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:56,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:56,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:56,049 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:56,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-25 16:16:57,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-25 16:16:57,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 16:16:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2094 trivial. 0 not checked. [2021-08-25 16:16:58,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:58,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034072220] [2021-08-25 16:16:58,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:58,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368550657] [2021-08-25 16:16:58,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368550657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:58,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:58,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 16:16:58,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875394821] [2021-08-25 16:16:58,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 16:16:58,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:58,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 16:16:58,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:58,377 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:58,406 INFO L93 Difference]: Finished difference Result 320 states and 361 transitions. [2021-08-25 16:16:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 16:16:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-08-25 16:16:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:58,409 INFO L225 Difference]: With dead ends: 320 [2021-08-25 16:16:58,410 INFO L226 Difference]: Without dead ends: 253 [2021-08-25 16:16:58,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-25 16:16:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2021-08-25 16:16:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.1274900398406376) internal successors, (283), 251 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2021-08-25 16:16:58,414 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 249 [2021-08-25 16:16:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:58,414 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2021-08-25 16:16:58,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2021-08-25 16:16:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-08-25 16:16:58,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:58,415 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 18, 18, 11, 11, 11, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:58,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:58,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-25 16:16:58,629 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:58,629 INFO L82 PathProgramCache]: Analyzing trace with hash -124690377, now seen corresponding path program 34 times [2021-08-25 16:16:58,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:58,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788618181] [2021-08-25 16:16:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:58,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:58,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:58,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535229824] [2021-08-25 16:16:58,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:58,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:58,644 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:58,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-25 16:17:00,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:17:00,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:17:00,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-25 16:17:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:17:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1851 trivial. 0 not checked. [2021-08-25 16:17:00,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:17:00,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788618181] [2021-08-25 16:17:00,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:17:00,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535229824] [2021-08-25 16:17:00,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535229824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:17:00,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:17:00,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-08-25 16:17:00,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442320981] [2021-08-25 16:17:00,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-25 16:17:00,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:17:00,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-25 16:17:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-25 16:17:00,829 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:17:00,881 INFO L93 Difference]: Finished difference Result 468 states and 530 transitions. [2021-08-25 16:17:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-25 16:17:00,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-08-25 16:17:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:17:00,882 INFO L225 Difference]: With dead ends: 468 [2021-08-25 16:17:00,882 INFO L226 Difference]: Without dead ends: 255 [2021-08-25 16:17:00,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-25 16:17:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-25 16:17:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2021-08-25 16:17:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.1264822134387351) internal successors, (285), 253 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2021-08-25 16:17:00,886 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 251 [2021-08-25 16:17:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:17:00,886 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2021-08-25 16:17:00,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2021-08-25 16:17:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-08-25 16:17:00,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:17:00,888 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 11, 11, 11, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:17:00,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-25 16:17:01,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-25 16:17:01,109 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:17:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:17:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash 426357237, now seen corresponding path program 35 times [2021-08-25 16:17:01,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:17:01,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591594106] [2021-08-25 16:17:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:17:01,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:17:01,122 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:17:01,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373647108] [2021-08-25 16:17:01,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:17:01,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:01,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:17:01,123 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:17:01,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-25 16:17:07,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-25 16:17:07,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:17:07,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-25 16:17:07,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:17:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2212 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1851 trivial. 0 not checked. [2021-08-25 16:17:08,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:17:08,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591594106] [2021-08-25 16:17:08,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:17:08,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373647108] [2021-08-25 16:17:08,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373647108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:17:08,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:17:08,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-08-25 16:17:08,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140065723] [2021-08-25 16:17:08,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-25 16:17:08,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:17:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-25 16:17:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-25 16:17:08,102 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:08,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:17:08,141 INFO L93 Difference]: Finished difference Result 469 states and 531 transitions. [2021-08-25 16:17:08,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-25 16:17:08,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-08-25 16:17:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:17:08,142 INFO L225 Difference]: With dead ends: 469 [2021-08-25 16:17:08,142 INFO L226 Difference]: Without dead ends: 256 [2021-08-25 16:17:08,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-25 16:17:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-25 16:17:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-08-25 16:17:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.1254901960784314) internal successors, (287), 255 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 287 transitions. [2021-08-25 16:17:08,147 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 287 transitions. Word has length 253 [2021-08-25 16:17:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:17:08,147 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 287 transitions. [2021-08-25 16:17:08,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 287 transitions. [2021-08-25 16:17:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-08-25 16:17:08,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:17:08,148 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:17:08,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-25 16:17:08,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-25 16:17:08,369 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:17:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:17:08,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1702136883, now seen corresponding path program 36 times [2021-08-25 16:17:08,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:17:08,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382049078] [2021-08-25 16:17:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:17:08,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:17:08,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:17:08,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724610988] [2021-08-25 16:17:08,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:17:08,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:17:08,385 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:17:08,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-25 16:17:12,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-08-25 16:17:12,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:17:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 16:17:12,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:17:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:17:13,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:17:13,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382049078] [2021-08-25 16:17:13,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:17:13,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724610988] [2021-08-25 16:17:13,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724610988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:17:13,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:17:13,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 16:17:13,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803834668] [2021-08-25 16:17:13,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 16:17:13,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:17:13,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 16:17:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:17:13,401 INFO L87 Difference]: Start difference. First operand 256 states and 287 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:17:13,430 INFO L93 Difference]: Finished difference Result 326 states and 367 transitions. [2021-08-25 16:17:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 16:17:13,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-08-25 16:17:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:17:13,431 INFO L225 Difference]: With dead ends: 326 [2021-08-25 16:17:13,431 INFO L226 Difference]: Without dead ends: 259 [2021-08-25 16:17:13,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:17:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-08-25 16:17:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2021-08-25 16:17:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.1245136186770428) internal successors, (289), 257 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2021-08-25 16:17:13,437 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 255 [2021-08-25 16:17:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:17:13,437 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2021-08-25 16:17:13,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2021-08-25 16:17:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-08-25 16:17:13,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:17:13,438 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:17:13,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-25 16:17:13,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:13,638 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:17:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:17:13,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2035070159, now seen corresponding path program 37 times [2021-08-25 16:17:13,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:17:13,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006343530] [2021-08-25 16:17:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:17:13,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:17:13,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:17:13,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002993954] [2021-08-25 16:17:13,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:17:13,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:13,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:17:13,666 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:17:13,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-25 16:17:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:17:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-25 16:17:15,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:17:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:17:15,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:17:15,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006343530] [2021-08-25 16:17:15,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:17:15,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002993954] [2021-08-25 16:17:15,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002993954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:17:15,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:17:15,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-25 16:17:15,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649064791] [2021-08-25 16:17:15,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-25 16:17:15,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:17:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-25 16:17:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-25 16:17:15,978 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:17:16,009 INFO L93 Difference]: Finished difference Result 328 states and 369 transitions. [2021-08-25 16:17:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 16:17:16,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2021-08-25 16:17:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:17:16,011 INFO L225 Difference]: With dead ends: 328 [2021-08-25 16:17:16,011 INFO L226 Difference]: Without dead ends: 261 [2021-08-25 16:17:16,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-25 16:17:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-25 16:17:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2021-08-25 16:17:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.1235521235521235) internal successors, (291), 259 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2021-08-25 16:17:16,015 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 257 [2021-08-25 16:17:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:17:16,015 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2021-08-25 16:17:16,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2021-08-25 16:17:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-08-25 16:17:16,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:17:16,016 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:17:16,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-25 16:17:16,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-25 16:17:16,234 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:17:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:17:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1396589231, now seen corresponding path program 38 times [2021-08-25 16:17:16,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:17:16,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703597031] [2021-08-25 16:17:16,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:17:16,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:17:16,252 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:17:16,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658894288] [2021-08-25 16:17:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:17:16,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:16,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:17:16,254 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:17:16,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-25 16:17:18,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:17:18,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:17:18,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 16:17:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:17:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:17:18,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:17:18,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703597031] [2021-08-25 16:17:18,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:17:18,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658894288] [2021-08-25 16:17:18,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658894288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:17:18,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:17:18,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-08-25 16:17:18,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041174736] [2021-08-25 16:17:18,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 16:17:18,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:17:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 16:17:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-25 16:17:18,658 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:17:18,697 INFO L93 Difference]: Finished difference Result 330 states and 371 transitions. [2021-08-25 16:17:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-25 16:17:18,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-08-25 16:17:18,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:17:18,698 INFO L225 Difference]: With dead ends: 330 [2021-08-25 16:17:18,698 INFO L226 Difference]: Without dead ends: 263 [2021-08-25 16:17:18,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-25 16:17:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-25 16:17:18,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2021-08-25 16:17:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.1226053639846743) internal successors, (293), 261 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 293 transitions. [2021-08-25 16:17:18,702 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 293 transitions. Word has length 259 [2021-08-25 16:17:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:17:18,702 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 293 transitions. [2021-08-25 16:17:18,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 293 transitions. [2021-08-25 16:17:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-08-25 16:17:18,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:17:18,704 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:17:18,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-25 16:17:18,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-25 16:17:18,925 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:17:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:17:18,925 INFO L82 PathProgramCache]: Analyzing trace with hash 686379693, now seen corresponding path program 39 times [2021-08-25 16:17:18,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:17:18,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900586558] [2021-08-25 16:17:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:17:18,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:17:18,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:17:18,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160785055] [2021-08-25 16:17:18,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:17:18,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:18,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:17:18,941 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:17:18,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-25 16:17:21,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-25 16:17:21,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:17:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-25 16:17:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:17:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:17:22,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:17:22,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900586558] [2021-08-25 16:17:22,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:17:22,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160785055] [2021-08-25 16:17:22,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160785055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:17:22,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:17:22,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-08-25 16:17:22,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673319558] [2021-08-25 16:17:22,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-25 16:17:22,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:17:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-25 16:17:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-25 16:17:22,163 INFO L87 Difference]: Start difference. First operand 262 states and 293 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:17:22,195 INFO L93 Difference]: Finished difference Result 332 states and 373 transitions. [2021-08-25 16:17:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-25 16:17:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2021-08-25 16:17:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:17:22,196 INFO L225 Difference]: With dead ends: 332 [2021-08-25 16:17:22,196 INFO L226 Difference]: Without dead ends: 265 [2021-08-25 16:17:22,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-25 16:17:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-25 16:17:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2021-08-25 16:17:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.1216730038022813) internal successors, (295), 263 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:22,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 295 transitions. [2021-08-25 16:17:22,200 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 295 transitions. Word has length 261 [2021-08-25 16:17:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:17:22,201 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 295 transitions. [2021-08-25 16:17:22,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 295 transitions. [2021-08-25 16:17:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-08-25 16:17:22,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:17:22,202 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:17:22,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-25 16:17:22,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:22,417 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:17:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:17:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1074813739, now seen corresponding path program 40 times [2021-08-25 16:17:22,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:17:22,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942983977] [2021-08-25 16:17:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:17:22,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:17:22,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:17:22,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111765802] [2021-08-25 16:17:22,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:17:22,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:22,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:17:22,432 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:17:22,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-25 16:17:24,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:17:24,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:17:24,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-25 16:17:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:17:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:17:25,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:17:25,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942983977] [2021-08-25 16:17:25,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:17:25,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111765802] [2021-08-25 16:17:25,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111765802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:17:25,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:17:25,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-08-25 16:17:25,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675185651] [2021-08-25 16:17:25,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-25 16:17:25,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:17:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-25 16:17:25,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-25 16:17:25,003 INFO L87 Difference]: Start difference. First operand 264 states and 295 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:17:25,037 INFO L93 Difference]: Finished difference Result 334 states and 375 transitions. [2021-08-25 16:17:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-25 16:17:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-08-25 16:17:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:17:25,038 INFO L225 Difference]: With dead ends: 334 [2021-08-25 16:17:25,038 INFO L226 Difference]: Without dead ends: 267 [2021-08-25 16:17:25,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-25 16:17:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-25 16:17:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2021-08-25 16:17:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.120754716981132) internal successors, (297), 265 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 297 transitions. [2021-08-25 16:17:25,042 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 297 transitions. Word has length 263 [2021-08-25 16:17:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:17:25,042 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 297 transitions. [2021-08-25 16:17:25,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:17:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 297 transitions. [2021-08-25 16:17:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-08-25 16:17:25,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:17:25,043 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:17:25,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-25 16:17:25,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-25 16:17:25,249 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:17:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:17:25,249 INFO L82 PathProgramCache]: Analyzing trace with hash 697777193, now seen corresponding path program 41 times [2021-08-25 16:17:25,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:17:25,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550456855] [2021-08-25 16:17:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:17:25,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:17:25,264 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:17:25,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954168202] [2021-08-25 16:17:25,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:17:25,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:17:25,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:17:25,269 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:17:25,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-25 16:18:05,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-25 16:18:05,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:18:05,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 16:18:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:18:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:18:05,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:18:05,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550456855] [2021-08-25 16:18:05,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:18:05,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954168202] [2021-08-25 16:18:05,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954168202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:18:05,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:18:05,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-08-25 16:18:05,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25926069] [2021-08-25 16:18:05,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-25 16:18:05,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:18:05,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-25 16:18:05,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-25 16:18:05,756 INFO L87 Difference]: Start difference. First operand 266 states and 297 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:18:05,814 INFO L93 Difference]: Finished difference Result 336 states and 377 transitions. [2021-08-25 16:18:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-25 16:18:05,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-08-25 16:18:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:18:05,815 INFO L225 Difference]: With dead ends: 336 [2021-08-25 16:18:05,815 INFO L226 Difference]: Without dead ends: 269 [2021-08-25 16:18:05,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-25 16:18:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-25 16:18:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2021-08-25 16:18:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.1198501872659177) internal successors, (299), 267 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 299 transitions. [2021-08-25 16:18:05,830 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 299 transitions. Word has length 265 [2021-08-25 16:18:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:18:05,830 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 299 transitions. [2021-08-25 16:18:05,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 299 transitions. [2021-08-25 16:18:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-08-25 16:18:05,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:18:05,831 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:18:05,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-25 16:18:06,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:06,037 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:18:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:18:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash -857090649, now seen corresponding path program 42 times [2021-08-25 16:18:06,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:18:06,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696054580] [2021-08-25 16:18:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:18:06,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:18:06,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:18:06,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520474817] [2021-08-25 16:18:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:18:06,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:06,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:18:06,053 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:18:06,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-25 16:18:14,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-08-25 16:18:14,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:18:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-25 16:18:14,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:18:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:18:14,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:18:14,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696054580] [2021-08-25 16:18:14,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:18:14,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520474817] [2021-08-25 16:18:14,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520474817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:18:14,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:18:14,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-08-25 16:18:14,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954994522] [2021-08-25 16:18:14,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-25 16:18:14,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:18:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-25 16:18:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-25 16:18:14,999 INFO L87 Difference]: Start difference. First operand 268 states and 299 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:18:15,036 INFO L93 Difference]: Finished difference Result 338 states and 379 transitions. [2021-08-25 16:18:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-25 16:18:15,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-08-25 16:18:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:18:15,037 INFO L225 Difference]: With dead ends: 338 [2021-08-25 16:18:15,037 INFO L226 Difference]: Without dead ends: 271 [2021-08-25 16:18:15,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-25 16:18:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-25 16:18:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2021-08-25 16:18:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1189591078066914) internal successors, (301), 269 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 301 transitions. [2021-08-25 16:18:15,041 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 301 transitions. Word has length 267 [2021-08-25 16:18:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:18:15,041 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 301 transitions. [2021-08-25 16:18:15,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 301 transitions. [2021-08-25 16:18:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-08-25 16:18:15,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:18:15,043 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:18:15,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-25 16:18:15,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-25 16:18:15,265 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:18:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:18:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash -436467803, now seen corresponding path program 43 times [2021-08-25 16:18:15,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:18:15,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53358959] [2021-08-25 16:18:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:18:15,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:18:15,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:18:15,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134107702] [2021-08-25 16:18:15,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:18:15,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:15,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:18:15,285 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:18:15,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-25 16:18:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:18:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-25 16:18:17,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:18:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:18:18,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:18:18,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53358959] [2021-08-25 16:18:18,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:18:18,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134107702] [2021-08-25 16:18:18,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134107702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:18:18,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:18:18,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-08-25 16:18:18,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530817008] [2021-08-25 16:18:18,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-25 16:18:18,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:18:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-25 16:18:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-25 16:18:18,337 INFO L87 Difference]: Start difference. First operand 270 states and 301 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:18,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:18:18,377 INFO L93 Difference]: Finished difference Result 340 states and 381 transitions. [2021-08-25 16:18:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-25 16:18:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-08-25 16:18:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:18:18,378 INFO L225 Difference]: With dead ends: 340 [2021-08-25 16:18:18,378 INFO L226 Difference]: Without dead ends: 273 [2021-08-25 16:18:18,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-25 16:18:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-25 16:18:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2021-08-25 16:18:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.118081180811808) internal successors, (303), 271 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 303 transitions. [2021-08-25 16:18:18,382 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 303 transitions. Word has length 269 [2021-08-25 16:18:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:18:18,382 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 303 transitions. [2021-08-25 16:18:18,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:18,382 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 303 transitions. [2021-08-25 16:18:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-08-25 16:18:18,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:18:18,383 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:18:18,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-25 16:18:18,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-25 16:18:18,593 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:18:18,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:18:18,593 INFO L82 PathProgramCache]: Analyzing trace with hash 55161379, now seen corresponding path program 44 times [2021-08-25 16:18:18,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:18:18,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32215752] [2021-08-25 16:18:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:18:18,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:18:18,608 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:18:18,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096258134] [2021-08-25 16:18:18,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:18:18,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:18:18,610 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:18:18,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-25 16:18:20,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:18:20,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:18:20,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-25 16:18:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:18:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:18:21,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:18:21,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32215752] [2021-08-25 16:18:21,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:18:21,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096258134] [2021-08-25 16:18:21,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096258134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:18:21,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:18:21,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-08-25 16:18:21,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635446936] [2021-08-25 16:18:21,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-25 16:18:21,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:18:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-25 16:18:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-25 16:18:21,610 INFO L87 Difference]: Start difference. First operand 272 states and 303 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:18:21,661 INFO L93 Difference]: Finished difference Result 342 states and 383 transitions. [2021-08-25 16:18:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-25 16:18:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-08-25 16:18:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:18:21,662 INFO L225 Difference]: With dead ends: 342 [2021-08-25 16:18:21,662 INFO L226 Difference]: Without dead ends: 275 [2021-08-25 16:18:21,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-25 16:18:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-25 16:18:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2021-08-25 16:18:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.1172161172161172) internal successors, (305), 273 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 305 transitions. [2021-08-25 16:18:21,666 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 305 transitions. Word has length 271 [2021-08-25 16:18:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:18:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 305 transitions. [2021-08-25 16:18:21,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 305 transitions. [2021-08-25 16:18:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-08-25 16:18:21,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:18:21,667 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:18:21,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-25 16:18:21,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:21,880 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:18:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:18:21,880 INFO L82 PathProgramCache]: Analyzing trace with hash 64402721, now seen corresponding path program 45 times [2021-08-25 16:18:21,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:18:21,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651022496] [2021-08-25 16:18:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:18:21,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:18:21,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:18:21,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756613364] [2021-08-25 16:18:21,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:18:21,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:18:21,898 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:18:21,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-25 16:18:28,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-25 16:18:28,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:18:29,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-25 16:18:29,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:18:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-08-25 16:18:29,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:18:29,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651022496] [2021-08-25 16:18:29,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:18:29,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756613364] [2021-08-25 16:18:29,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756613364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:18:29,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:18:29,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-08-25 16:18:29,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577823376] [2021-08-25 16:18:29,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-25 16:18:29,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:18:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-25 16:18:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-25 16:18:29,703 INFO L87 Difference]: Start difference. First operand 274 states and 305 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:18:29,745 INFO L93 Difference]: Finished difference Result 343 states and 384 transitions. [2021-08-25 16:18:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-25 16:18:29,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-08-25 16:18:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:18:29,746 INFO L225 Difference]: With dead ends: 343 [2021-08-25 16:18:29,746 INFO L226 Difference]: Without dead ends: 276 [2021-08-25 16:18:29,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-25 16:18:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-08-25 16:18:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2021-08-25 16:18:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.1163636363636364) internal successors, (307), 275 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 307 transitions. [2021-08-25 16:18:29,750 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 307 transitions. Word has length 273 [2021-08-25 16:18:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:18:29,751 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 307 transitions. [2021-08-25 16:18:29,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:18:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 307 transitions. [2021-08-25 16:18:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-08-25 16:18:29,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:18:29,752 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:18:29,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-25 16:18:29,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:29,965 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:18:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:18:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash 355397791, now seen corresponding path program 46 times [2021-08-25 16:18:29,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:18:29,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086903023] [2021-08-25 16:18:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:18:29,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:18:29,994 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:18:29,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841737355] [2021-08-25 16:18:29,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:18:29,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:18:29,995 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:18:29,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-25 16:18:36,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:18:36,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-25 16:18:36,941 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 16:18:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 16:18:41,711 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 16:18:41,711 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 16:18:41,712 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 16:18:41,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-25 16:18:41,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:18:41,929 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 16:18:42,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 04:18:42 BoogieIcfgContainer [2021-08-25 16:18:42,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 16:18:42,044 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 16:18:42,044 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 16:18:42,045 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 16:18:42,045 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:16:05" (3/4) ... [2021-08-25 16:18:42,046 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 16:18:42,134 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 16:18:42,134 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 16:18:42,135 INFO L168 Benchmark]: Toolchain (without parser) took 157676.76 ms. Allocated memory was 58.7 MB in the beginning and 799.0 MB in the end (delta: 740.3 MB). Free memory was 43.7 MB in the beginning and 362.2 MB in the end (delta: -318.6 MB). Peak memory consumption was 421.1 MB. Max. memory is 16.1 GB. [2021-08-25 16:18:42,135 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 46.1 MB. Free memory is still 28.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 16:18:42,136 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.90 ms. Allocated memory is still 58.7 MB. Free memory was 43.5 MB in the beginning and 41.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 16:18:42,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.41 ms. Allocated memory is still 58.7 MB. Free memory was 41.8 MB in the beginning and 39.8 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 16:18:42,136 INFO L168 Benchmark]: Boogie Preprocessor took 36.00 ms. Allocated memory is still 58.7 MB. Free memory was 39.8 MB in the beginning and 38.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 16:18:42,137 INFO L168 Benchmark]: RCFGBuilder took 385.38 ms. Allocated memory is still 58.7 MB. Free memory was 38.4 MB in the beginning and 32.5 MB in the end (delta: 5.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-08-25 16:18:42,137 INFO L168 Benchmark]: TraceAbstraction took 156920.27 ms. Allocated memory was 58.7 MB in the beginning and 799.0 MB in the end (delta: 740.3 MB). Free memory was 32.0 MB in the beginning and 383.2 MB in the end (delta: -351.2 MB). Peak memory consumption was 389.5 MB. Max. memory is 16.1 GB. [2021-08-25 16:18:42,137 INFO L168 Benchmark]: Witness Printer took 89.62 ms. Allocated memory is still 799.0 MB. Free memory was 383.2 MB in the beginning and 362.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-08-25 16:18:42,138 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 46.1 MB. Free memory is still 28.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 200.90 ms. Allocated memory is still 58.7 MB. Free memory was 43.5 MB in the beginning and 41.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.41 ms. Allocated memory is still 58.7 MB. Free memory was 41.8 MB in the beginning and 39.8 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.00 ms. Allocated memory is still 58.7 MB. Free memory was 39.8 MB in the beginning and 38.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 385.38 ms. Allocated memory is still 58.7 MB. Free memory was 38.4 MB in the beginning and 32.5 MB in the end (delta: 5.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 156920.27 ms. Allocated memory was 58.7 MB in the beginning and 799.0 MB in the end (delta: 740.3 MB). Free memory was 32.0 MB in the beginning and 383.2 MB in the end (delta: -351.2 MB). Peak memory consumption was 389.5 MB. Max. memory is 16.1 GB. * Witness Printer took 89.62 ms. Allocated memory is still 799.0 MB. Free memory was 383.2 MB in the beginning and 362.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[20]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 20) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<20 -1) [L57] x[20 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 156752.4ms, OverallIterations: 58, TraceHistogramMax: 20, EmptinessCheckTime: 64.3ms, AutomataDifference: 2771.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1675 SDtfs, 1423 SDslu, 3754 SDs, 0 SdLazy, 2257 SolverSat, 698 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1723.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8135 GetRequests, 7626 SyntacticMatches, 0 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2807.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=276occurred in iteration=57, InterpolantAutomatonStates: 613, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 241.6ms AutomataMinimizationTime, 57 MinimizatonAttempts, 167 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1015.1ms SsaConstructionTime, 68496.0ms SatisfiabilityAnalysisTime, 20073.4ms InterpolantComputationTime, 8672 NumberOfCodeBlocks, 7597 NumberOfCodeBlocksAsserted, 317 NumberOfCheckSat, 8334 ConstructedInterpolants, 0 QuantifiedInterpolants, 10484 SizeOfPredicates, 5 NumberOfNonLiveVariables, 19089 ConjunctsInSsa, 565 ConjunctsInUnsatCore, 63 InterpolantComputations, 7 PerfectInterpolantSequences, 47306/52618 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 RESULT: Ultimate proved your program to be incorrect! [2021-08-25 16:18:42,176 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...