./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/array-tiling/pnr5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:31:36,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:31:36,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:31:36,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:31:36,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:31:36,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:31:36,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:31:36,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:31:36,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:31:36,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:31:36,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:31:36,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:31:36,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:31:36,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:31:36,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:31:36,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:31:36,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:31:36,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:31:36,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:31:36,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:31:36,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:31:36,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:31:36,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:31:36,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:31:36,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:31:36,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:31:36,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:31:36,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:31:36,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:31:36,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:31:36,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:31:36,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:31:36,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:31:36,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:31:36,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:31:36,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:31:36,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:31:36,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:31:36,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:31:36,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:31:36,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:31:36,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:31:36,396 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:31:36,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:31:36,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:31:36,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:31:36,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:31:36,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:31:36,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:31:36,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:31:36,401 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:31:36,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:31:36,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:31:36,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:31:36,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:31:36,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:31:36,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:31:36,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:31:36,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:31:36,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:31:36,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:31:36,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:31:36,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:31:36,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:31:36,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:31:36,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:31:36,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:31:36,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:31:36,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:31:36,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:31:36,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:31:36,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:31:36,403 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:31:36,403 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:31:36,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:31:36,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2021-12-27 21:31:36,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:31:36,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:31:36,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:31:36,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:31:36,733 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:31:36,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr5.c [2021-12-27 21:31:36,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15d63dfb6/993faa54f0be4ec582d32e6e4fd1f70a/FLAG983565a93 [2021-12-27 21:31:37,195 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:31:37,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c [2021-12-27 21:31:37,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15d63dfb6/993faa54f0be4ec582d32e6e4fd1f70a/FLAG983565a93 [2021-12-27 21:31:37,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15d63dfb6/993faa54f0be4ec582d32e6e4fd1f70a [2021-12-27 21:31:37,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:31:37,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:31:37,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:31:37,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:31:37,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:31:37,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9baba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37, skipping insertion in model container [2021-12-27 21:31:37,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:31:37,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:31:37,726 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-12-27 21:31:37,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:31:37,770 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:31:37,785 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-12-27 21:31:37,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:31:37,820 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:31:37,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37 WrapperNode [2021-12-27 21:31:37,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:31:37,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:31:37,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:31:37,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:31:37,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,873 INFO L137 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2021-12-27 21:31:37,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:31:37,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:31:37,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:31:37,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:31:37,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:31:37,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:31:37,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:31:37,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:31:37,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (1/1) ... [2021-12-27 21:31:37,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:31:37,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:37,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 21:31:37,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 21:31:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:31:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:31:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:31:37,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-27 21:31:37,973 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-27 21:31:37,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-27 21:31:37,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:31:37,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:31:37,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:31:38,036 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:31:38,037 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:31:38,172 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:31:38,178 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:31:38,178 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-27 21:31:38,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:31:38 BoogieIcfgContainer [2021-12-27 21:31:38,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:31:38,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:31:38,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:31:38,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:31:38,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:31:37" (1/3) ... [2021-12-27 21:31:38,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232a8459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:31:38, skipping insertion in model container [2021-12-27 21:31:38,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:37" (2/3) ... [2021-12-27 21:31:38,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232a8459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:31:38, skipping insertion in model container [2021-12-27 21:31:38,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:31:38" (3/3) ... [2021-12-27 21:31:38,185 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2021-12-27 21:31:38,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:31:38,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:31:38,243 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:31:38,248 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 21:31:38,283 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:31:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:31:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-27 21:31:38,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:38,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:38,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1765780314, now seen corresponding path program 1 times [2021-12-27 21:31:38,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:38,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952903207] [2021-12-27 21:31:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:38,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:31:38,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:38,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952903207] [2021-12-27 21:31:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952903207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:31:38,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:31:38,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:31:38,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704105306] [2021-12-27 21:31:38,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:31:38,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:31:38,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:31:38,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:31:38,545 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:31:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:38,570 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2021-12-27 21:31:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:31:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-27 21:31:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:38,580 INFO L225 Difference]: With dead ends: 69 [2021-12-27 21:31:38,580 INFO L226 Difference]: Without dead ends: 33 [2021-12-27 21:31:38,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:31:38,590 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:38,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:31:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-27 21:31:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-27 21:31:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:31:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-12-27 21:31:38,637 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2021-12-27 21:31:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:38,638 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-12-27 21:31:38,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:31:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-12-27 21:31:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-27 21:31:38,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:38,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:38,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:31:38,642 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1807338759, now seen corresponding path program 1 times [2021-12-27 21:31:38,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:38,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034816297] [2021-12-27 21:31:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:38,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:31:38,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:38,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034816297] [2021-12-27 21:31:38,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034816297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:31:38,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:31:38,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:31:38,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745430948] [2021-12-27 21:31:38,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:31:38,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:31:38,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:31:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:31:38,923 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:31:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:39,057 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-12-27 21:31:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:31:39,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-27 21:31:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:39,060 INFO L225 Difference]: With dead ends: 57 [2021-12-27 21:31:39,060 INFO L226 Difference]: Without dead ends: 50 [2021-12-27 21:31:39,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:31:39,066 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:39,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:31:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-27 21:31:39,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2021-12-27 21:31:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:31:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-12-27 21:31:39,097 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 11 [2021-12-27 21:31:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:39,098 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-12-27 21:31:39,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:31:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-12-27 21:31:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 21:31:39,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:39,104 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1] [2021-12-27 21:31:39,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:31:39,105 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1950771071, now seen corresponding path program 1 times [2021-12-27 21:31:39,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:39,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235062756] [2021-12-27 21:31:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:39,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:31:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:31:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:39,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:39,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235062756] [2021-12-27 21:31:39,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235062756] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:39,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706247788] [2021-12-27 21:31:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:39,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:39,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:39,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:31:39,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:31:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-27 21:31:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:39,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:39,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:39,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-27 21:31:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:39,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-27 21:31:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:39,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-27 21:31:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:39,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-27 21:31:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:39,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:40,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-27 21:31:40,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-27 21:31:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:40,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706247788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:40,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:40,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2021-12-27 21:31:40,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051371541] [2021-12-27 21:31:40,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:40,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 21:31:40,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:40,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 21:31:40,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:31:40,207 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:31:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:40,596 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2021-12-27 21:31:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-27 21:31:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2021-12-27 21:31:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:40,598 INFO L225 Difference]: With dead ends: 120 [2021-12-27 21:31:40,598 INFO L226 Difference]: Without dead ends: 118 [2021-12-27 21:31:40,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:31:40,599 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:40,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 293 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:31:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-27 21:31:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2021-12-27 21:31:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-27 21:31:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2021-12-27 21:31:40,612 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 43 [2021-12-27 21:31:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:40,613 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2021-12-27 21:31:40,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:31:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2021-12-27 21:31:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 21:31:40,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:40,615 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1] [2021-12-27 21:31:40,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-27 21:31:40,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:40,832 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1642596351, now seen corresponding path program 1 times [2021-12-27 21:31:40,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:40,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212619019] [2021-12-27 21:31:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:40,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:41,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:41,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:41,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:31:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:41,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:31:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:41,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:41,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212619019] [2021-12-27 21:31:41,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212619019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:41,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776476589] [2021-12-27 21:31:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:41,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:41,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:41,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:31:41,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:31:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-27 21:31:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:41,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:41,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:41,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:41,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:41,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:41,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:41,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:41,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-27 21:31:41,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-27 21:31:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:31:41,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:41,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-27 21:31:41,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-27 21:31:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:42,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776476589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:42,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:42,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-27 21:31:42,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658207914] [2021-12-27 21:31:42,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:42,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:31:42,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:42,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:31:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:31:42,051 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-27 21:31:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:42,844 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2021-12-27 21:31:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-27 21:31:42,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 43 [2021-12-27 21:31:42,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:42,847 INFO L225 Difference]: With dead ends: 179 [2021-12-27 21:31:42,848 INFO L226 Difference]: Without dead ends: 177 [2021-12-27 21:31:42,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-12-27 21:31:42,849 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:42,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 516 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 643 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2021-12-27 21:31:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-27 21:31:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 87. [2021-12-27 21:31:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.359375) internal successors, (87), 65 states have internal predecessors, (87), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-27 21:31:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2021-12-27 21:31:42,874 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 43 [2021-12-27 21:31:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:42,875 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2021-12-27 21:31:42,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-27 21:31:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2021-12-27 21:31:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-27 21:31:42,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:42,877 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:42,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:43,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-27 21:31:43,102 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:43,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1666037387, now seen corresponding path program 1 times [2021-12-27 21:31:43,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:43,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336237154] [2021-12-27 21:31:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:43,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:31:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:31:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:43,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:43,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336237154] [2021-12-27 21:31:43,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336237154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:43,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607007670] [2021-12-27 21:31:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:43,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:43,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:43,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:31:43,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:31:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-27 21:31:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:43,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:43,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-27 21:31:43,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:43,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-27 21:31:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:43,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:31:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:43,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:43,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-27 21:31:43,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-27 21:31:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:43,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607007670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:43,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:43,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-27 21:31:43,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547028675] [2021-12-27 21:31:43,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:43,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-27 21:31:43,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-27 21:31:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-27 21:31:43,809 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:31:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:44,261 INFO L93 Difference]: Finished difference Result 322 states and 492 transitions. [2021-12-27 21:31:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-27 21:31:44,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2021-12-27 21:31:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:44,264 INFO L225 Difference]: With dead ends: 322 [2021-12-27 21:31:44,264 INFO L226 Difference]: Without dead ends: 320 [2021-12-27 21:31:44,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-27 21:31:44,265 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:44,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 345 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:31:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-27 21:31:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 153. [2021-12-27 21:31:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.3928571428571428) internal successors, (156), 114 states have internal predecessors, (156), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-27 21:31:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-12-27 21:31:44,330 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 47 [2021-12-27 21:31:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:44,332 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-12-27 21:31:44,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:31:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-12-27 21:31:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-27 21:31:44,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:44,340 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:44,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:44,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:44,570 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash -279833993, now seen corresponding path program 1 times [2021-12-27 21:31:44,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:44,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353423984] [2021-12-27 21:31:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:44,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:44,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:44,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:44,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:31:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:44,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:31:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:44,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353423984] [2021-12-27 21:31:44,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353423984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:44,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126269027] [2021-12-27 21:31:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:44,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:44,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:31:44,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:31:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-27 21:31:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:44,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:45,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:45,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:45,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-27 21:31:45,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-27 21:31:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-27 21:31:45,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:45,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-27 21:31:45,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-27 21:31:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126269027] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:45,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-12-27 21:31:45,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483935193] [2021-12-27 21:31:45,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:45,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-27 21:31:45,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-27 21:31:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-27 21:31:45,596 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-27 21:31:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:46,431 INFO L93 Difference]: Finished difference Result 432 states and 643 transitions. [2021-12-27 21:31:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-27 21:31:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 47 [2021-12-27 21:31:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:46,434 INFO L225 Difference]: With dead ends: 432 [2021-12-27 21:31:46,434 INFO L226 Difference]: Without dead ends: 430 [2021-12-27 21:31:46,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-12-27 21:31:46,436 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 182 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:46,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 629 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 684 Invalid, 0 Unknown, 86 Unchecked, 0.5s Time] [2021-12-27 21:31:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-12-27 21:31:46,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 220. [2021-12-27 21:31:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 161 states have internal predecessors, (223), 57 states have call successors, (57), 4 states have call predecessors, (57), 4 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-12-27 21:31:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 337 transitions. [2021-12-27 21:31:46,475 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 337 transitions. Word has length 47 [2021-12-27 21:31:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:46,476 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 337 transitions. [2021-12-27 21:31:46,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-27 21:31:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 337 transitions. [2021-12-27 21:31:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-27 21:31:46,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:46,478 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:46,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:46,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:46,706 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash 131088491, now seen corresponding path program 2 times [2021-12-27 21:31:46,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:46,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253079758] [2021-12-27 21:31:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:46,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:46,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:46,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:46,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:31:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:46,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:31:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:46,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253079758] [2021-12-27 21:31:46,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253079758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004677237] [2021-12-27 21:31:46,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:31:46,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:46,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:46,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:31:46,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:31:46,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:31:46,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:46,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-27 21:31:46,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:46,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:46,994 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:31:46,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-27 21:31:47,025 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-27 21:31:47,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:31:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:47,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:47,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-27 21:31:47,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-27 21:31:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004677237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:47,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:47,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-27 21:31:47,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836005618] [2021-12-27 21:31:47,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:47,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 21:31:47,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 21:31:47,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:31:47,225 INFO L87 Difference]: Start difference. First operand 220 states and 337 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-27 21:31:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:47,919 INFO L93 Difference]: Finished difference Result 1182 states and 1872 transitions. [2021-12-27 21:31:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-27 21:31:47,920 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2021-12-27 21:31:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:47,925 INFO L225 Difference]: With dead ends: 1182 [2021-12-27 21:31:47,926 INFO L226 Difference]: Without dead ends: 1180 [2021-12-27 21:31:47,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-12-27 21:31:47,927 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 95 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:47,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 479 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 21:31:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-12-27 21:31:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 481. [2021-12-27 21:31:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 346 states have (on average 1.4421965317919074) internal successors, (499), 349 states have internal predecessors, (499), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 127 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-27 21:31:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 759 transitions. [2021-12-27 21:31:47,998 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 759 transitions. Word has length 51 [2021-12-27 21:31:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:47,999 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 759 transitions. [2021-12-27 21:31:47,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-27 21:31:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 759 transitions. [2021-12-27 21:31:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-27 21:31:48,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:48,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:48,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:48,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:48,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2054316525, now seen corresponding path program 1 times [2021-12-27 21:31:48,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468617672] [2021-12-27 21:31:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:48,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:48,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:48,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:48,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:48,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:31:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:48,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:31:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:48,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:48,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468617672] [2021-12-27 21:31:48,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468617672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662063204] [2021-12-27 21:31:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:48,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:48,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:48,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:31:48,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:31:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-27 21:31:48,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:48,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:48,644 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:31:48,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:48,709 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-27 21:31:48,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-27 21:31:48,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-27 21:31:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-27 21:31:48,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:49,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-27 21:31:49,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-27 21:31:49,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662063204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:49,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:31:49,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-27 21:31:49,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225439172] [2021-12-27 21:31:49,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:49,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-27 21:31:49,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-27 21:31:49,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-27 21:31:49,116 INFO L87 Difference]: Start difference. First operand 481 states and 759 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:31:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:50,082 INFO L93 Difference]: Finished difference Result 1111 states and 1714 transitions. [2021-12-27 21:31:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-27 21:31:50,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 51 [2021-12-27 21:31:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:50,087 INFO L225 Difference]: With dead ends: 1111 [2021-12-27 21:31:50,087 INFO L226 Difference]: Without dead ends: 1109 [2021-12-27 21:31:50,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=354, Invalid=1998, Unknown=0, NotChecked=0, Total=2352 [2021-12-27 21:31:50,089 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 181 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:50,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 551 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 648 Invalid, 0 Unknown, 104 Unchecked, 0.5s Time] [2021-12-27 21:31:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-12-27 21:31:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 573. [2021-12-27 21:31:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 408 states have (on average 1.4411764705882353) internal successors, (588), 415 states have internal predecessors, (588), 156 states have call successors, (156), 8 states have call predecessors, (156), 8 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2021-12-27 21:31:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 900 transitions. [2021-12-27 21:31:50,163 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 900 transitions. Word has length 51 [2021-12-27 21:31:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:50,163 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 900 transitions. [2021-12-27 21:31:50,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:31:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 900 transitions. [2021-12-27 21:31:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-27 21:31:50,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:50,165 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:50,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-27 21:31:50,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:50,379 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:50,380 INFO L85 PathProgramCache]: Analyzing trace with hash 881708129, now seen corresponding path program 3 times [2021-12-27 21:31:50,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:50,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013901300] [2021-12-27 21:31:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:50,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:50,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:50,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:50,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:31:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:50,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:31:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:50,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013901300] [2021-12-27 21:31:50,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013901300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853787418] [2021-12-27 21:31:50,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:31:50,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:50,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:31:50,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:31:50,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-27 21:31:50,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-27 21:31:50,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:50,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:52,845 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-27 21:31:52,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:31:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:31:53,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:01,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-27 21:32:01,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-27 21:32:01,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853787418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:01,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:32:01,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-27 21:32:01,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632592916] [2021-12-27 21:32:01,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:01,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:32:01,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:32:01,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=500, Unknown=5, NotChecked=0, Total=600 [2021-12-27 21:32:01,667 INFO L87 Difference]: Start difference. First operand 573 states and 900 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:32:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:06,843 INFO L93 Difference]: Finished difference Result 2119 states and 3338 transitions. [2021-12-27 21:32:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-27 21:32:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2021-12-27 21:32:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:06,854 INFO L225 Difference]: With dead ends: 2119 [2021-12-27 21:32:06,854 INFO L226 Difference]: Without dead ends: 2117 [2021-12-27 21:32:06,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=390, Invalid=1859, Unknown=7, NotChecked=0, Total=2256 [2021-12-27 21:32:06,856 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 248 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:06,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 676 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 936 Invalid, 0 Unknown, 74 Unchecked, 0.6s Time] [2021-12-27 21:32:06,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-12-27 21:32:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1785. [2021-12-27 21:32:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1268 states have (on average 1.4652996845425867) internal successors, (1858), 1275 states have internal predecessors, (1858), 500 states have call successors, (500), 16 states have call predecessors, (500), 16 states have return successors, (500), 493 states have call predecessors, (500), 500 states have call successors, (500) [2021-12-27 21:32:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 2858 transitions. [2021-12-27 21:32:07,088 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 2858 transitions. Word has length 55 [2021-12-27 21:32:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:07,088 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 2858 transitions. [2021-12-27 21:32:07,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:32:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 2858 transitions. [2021-12-27 21:32:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-27 21:32:07,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:07,091 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:07,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:07,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:07,307 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1022256739, now seen corresponding path program 1 times [2021-12-27 21:32:07,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:07,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435036474] [2021-12-27 21:32:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:07,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:07,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:07,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:07,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:07,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:32:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:07,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:32:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:07,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435036474] [2021-12-27 21:32:07,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435036474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773612934] [2021-12-27 21:32:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:07,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:07,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:07,524 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:32:07,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:32:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-27 21:32:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:07,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:32:07,818 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-27 21:32:07,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-27 21:32:07,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-27 21:32:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:32:07,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:10,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-27 21:32:10,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-27 21:32:10,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773612934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:10,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:32:10,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-27 21:32:10,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550934554] [2021-12-27 21:32:10,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:10,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:32:10,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:32:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=523, Unknown=1, NotChecked=0, Total=600 [2021-12-27 21:32:10,236 INFO L87 Difference]: Start difference. First operand 1785 states and 2858 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:32:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:12,060 INFO L93 Difference]: Finished difference Result 4226 states and 6697 transitions. [2021-12-27 21:32:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-27 21:32:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2021-12-27 21:32:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:12,077 INFO L225 Difference]: With dead ends: 4226 [2021-12-27 21:32:12,077 INFO L226 Difference]: Without dead ends: 4224 [2021-12-27 21:32:12,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=433, Invalid=2988, Unknown=1, NotChecked=0, Total=3422 [2021-12-27 21:32:12,081 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 329 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:12,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 782 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 1135 Invalid, 0 Unknown, 137 Unchecked, 0.8s Time] [2021-12-27 21:32:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2021-12-27 21:32:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 2269. [2021-12-27 21:32:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 1608 states have (on average 1.4676616915422886) internal successors, (2360), 1616 states have internal predecessors, (2360), 636 states have call successors, (636), 24 states have call predecessors, (636), 24 states have return successors, (636), 628 states have call predecessors, (636), 636 states have call successors, (636) [2021-12-27 21:32:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3632 transitions. [2021-12-27 21:32:12,399 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3632 transitions. Word has length 55 [2021-12-27 21:32:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:12,399 INFO L470 AbstractCegarLoop]: Abstraction has 2269 states and 3632 transitions. [2021-12-27 21:32:12,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:32:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3632 transitions. [2021-12-27 21:32:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-27 21:32:12,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:12,402 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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, 1, 1] [2021-12-27 21:32:12,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:12,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-27 21:32:12,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871831, now seen corresponding path program 4 times [2021-12-27 21:32:12,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:12,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495159362] [2021-12-27 21:32:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:12,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:12,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:12,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:12,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:32:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:12,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:32:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:12,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495159362] [2021-12-27 21:32:12,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495159362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:12,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903662213] [2021-12-27 21:32:12,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:32:12,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:12,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:12,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:32:12,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:32:12,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:32:12,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:32:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-27 21:32:12,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:12,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-27 21:32:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:13,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:13,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-27 21:32:13,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-27 21:32:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:13,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903662213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:32:13,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:32:13,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 16 [2021-12-27 21:32:13,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539734662] [2021-12-27 21:32:13,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:13,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-27 21:32:13,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-27 21:32:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-27 21:32:13,148 INFO L87 Difference]: Start difference. First operand 2269 states and 3632 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-27 21:32:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:17,302 INFO L93 Difference]: Finished difference Result 15826 states and 25522 transitions. [2021-12-27 21:32:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-27 21:32:17,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-12-27 21:32:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:17,372 INFO L225 Difference]: With dead ends: 15826 [2021-12-27 21:32:17,372 INFO L226 Difference]: Without dead ends: 15824 [2021-12-27 21:32:17,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=777, Invalid=6195, Unknown=0, NotChecked=0, Total=6972 [2021-12-27 21:32:17,385 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 339 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 4112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:17,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1740 Invalid, 4112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-27 21:32:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-12-27 21:32:18,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 6227. [2021-12-27 21:32:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6227 states, 4410 states have (on average 1.482766439909297) internal successors, (6539), 4410 states have internal predecessors, (6539), 1792 states have call successors, (1792), 24 states have call predecessors, (1792), 24 states have return successors, (1792), 1792 states have call predecessors, (1792), 1792 states have call successors, (1792) [2021-12-27 21:32:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6227 states to 6227 states and 10123 transitions. [2021-12-27 21:32:18,417 INFO L78 Accepts]: Start accepts. Automaton has 6227 states and 10123 transitions. Word has length 59 [2021-12-27 21:32:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:18,417 INFO L470 AbstractCegarLoop]: Abstraction has 6227 states and 10123 transitions. [2021-12-27 21:32:18,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-27 21:32:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6227 states and 10123 transitions. [2021-12-27 21:32:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-27 21:32:18,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:18,421 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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, 1, 1] [2021-12-27 21:32:18,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:18,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:18,635 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash 58433497, now seen corresponding path program 1 times [2021-12-27 21:32:18,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:18,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603158333] [2021-12-27 21:32:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:18,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:18,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:18,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:32:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:32:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:18,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:18,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603158333] [2021-12-27 21:32:18,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603158333] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156750281] [2021-12-27 21:32:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:18,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:18,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:18,768 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:32:18,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:32:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:18,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-27 21:32:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:18,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-27 21:32:19,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-27 21:32:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:19,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:19,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-27 21:32:19,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-27 21:32:19,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156750281] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:19,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:32:19,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-12-27 21:32:19,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448396944] [2021-12-27 21:32:19,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:19,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-27 21:32:19,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-27 21:32:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-12-27 21:32:19,503 INFO L87 Difference]: Start difference. First operand 6227 states and 10123 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-27 21:32:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:22,976 INFO L93 Difference]: Finished difference Result 11401 states and 18297 transitions. [2021-12-27 21:32:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-27 21:32:22,976 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2021-12-27 21:32:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:23,015 INFO L225 Difference]: With dead ends: 11401 [2021-12-27 21:32:23,016 INFO L226 Difference]: Without dead ends: 11399 [2021-12-27 21:32:23,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1049, Invalid=5757, Unknown=0, NotChecked=0, Total=6806 [2021-12-27 21:32:23,025 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 347 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:23,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 936 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-27 21:32:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-12-27 21:32:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 2317. [2021-12-27 21:32:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1656 states have (on average 1.458937198067633) internal successors, (2416), 1664 states have internal predecessors, (2416), 636 states have call successors, (636), 24 states have call predecessors, (636), 24 states have return successors, (636), 628 states have call predecessors, (636), 636 states have call successors, (636) [2021-12-27 21:32:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3688 transitions. [2021-12-27 21:32:23,589 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3688 transitions. Word has length 59 [2021-12-27 21:32:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:23,589 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3688 transitions. [2021-12-27 21:32:23,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-27 21:32:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3688 transitions. [2021-12-27 21:32:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-27 21:32:23,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:23,593 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 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, 1, 1] [2021-12-27 21:32:23,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:23,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-27 21:32:23,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash 819831629, now seen corresponding path program 5 times [2021-12-27 21:32:23,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:23,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287297532] [2021-12-27 21:32:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:23,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:24,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:24,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:24,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:24,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:32:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:24,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:32:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:24,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:24,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287297532] [2021-12-27 21:32:24,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287297532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246130503] [2021-12-27 21:32:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:32:24,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:24,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:32:24,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-27 21:32:24,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-27 21:32:24,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:32:24,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 21:32:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:24,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:32:25,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246130503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:32:25,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:32:25,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2021-12-27 21:32:25,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558336455] [2021-12-27 21:32:25,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:25,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-27 21:32:25,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-27 21:32:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-12-27 21:32:25,202 INFO L87 Difference]: Start difference. First operand 2317 states and 3688 transitions. Second operand has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-27 21:32:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:25,939 INFO L93 Difference]: Finished difference Result 2684 states and 4253 transitions. [2021-12-27 21:32:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-27 21:32:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 63 [2021-12-27 21:32:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:25,951 INFO L225 Difference]: With dead ends: 2684 [2021-12-27 21:32:25,951 INFO L226 Difference]: Without dead ends: 2656 [2021-12-27 21:32:25,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-12-27 21:32:25,954 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 400 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:25,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 152 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:32:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-12-27 21:32:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2349. [2021-12-27 21:32:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 1688 states have (on average 1.4502369668246446) internal successors, (2448), 1688 states have internal predecessors, (2448), 636 states have call successors, (636), 24 states have call predecessors, (636), 24 states have return successors, (636), 636 states have call predecessors, (636), 636 states have call successors, (636) [2021-12-27 21:32:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3720 transitions. [2021-12-27 21:32:26,347 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3720 transitions. Word has length 63 [2021-12-27 21:32:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:26,347 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 3720 transitions. [2021-12-27 21:32:26,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-27 21:32:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3720 transitions. [2021-12-27 21:32:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-27 21:32:26,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:26,352 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:26,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-27 21:32:26,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-27 21:32:26,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:26,557 INFO L85 PathProgramCache]: Analyzing trace with hash 374578441, now seen corresponding path program 2 times [2021-12-27 21:32:26,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:26,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746920179] [2021-12-27 21:32:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:26,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:32:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:32:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:32:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-27 21:32:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-27 21:32:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-27 21:32:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-27 21:32:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-27 21:32:26,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:26,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746920179] [2021-12-27 21:32:26,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746920179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:26,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574886646] [2021-12-27 21:32:26,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:32:26,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:26,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:26,804 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:32:26,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-27 21:32:26,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:32:26,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:32:26,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-27 21:32:26,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:26,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:32:27,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:32:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:32:27,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:32:27,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:32:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:27,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:32:27,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-27 21:32:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-27 21:32:27,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:27,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574886646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:27,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:32:27,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-27 21:32:27,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686132115] [2021-12-27 21:32:27,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:27,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:32:27,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:27,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:32:27,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-27 21:32:27,955 INFO L87 Difference]: Start difference. First operand 2349 states and 3720 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-27 21:32:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:29,218 INFO L93 Difference]: Finished difference Result 3549 states and 5535 transitions. [2021-12-27 21:32:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-27 21:32:29,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2021-12-27 21:32:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:29,228 INFO L225 Difference]: With dead ends: 3549 [2021-12-27 21:32:29,229 INFO L226 Difference]: Without dead ends: 3547 [2021-12-27 21:32:29,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 107 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2021-12-27 21:32:29,233 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 180 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:29,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 578 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 639 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2021-12-27 21:32:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-12-27 21:32:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2301. [2021-12-27 21:32:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 1644 states have (on average 1.4482968369829683) internal successors, (2381), 1653 states have internal predecessors, (2381), 631 states have call successors, (631), 25 states have call predecessors, (631), 25 states have return successors, (631), 622 states have call predecessors, (631), 631 states have call successors, (631) [2021-12-27 21:32:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3643 transitions. [2021-12-27 21:32:29,694 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3643 transitions. Word has length 75 [2021-12-27 21:32:29,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:29,695 INFO L470 AbstractCegarLoop]: Abstraction has 2301 states and 3643 transitions. [2021-12-27 21:32:29,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-27 21:32:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3643 transitions. [2021-12-27 21:32:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-27 21:32:29,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:29,699 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:29,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:29,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-27 21:32:29,924 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1525924609, now seen corresponding path program 2 times [2021-12-27 21:32:29,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:29,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804447531] [2021-12-27 21:32:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:29,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:32:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:32:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:32:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-27 21:32:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-27 21:32:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-27 21:32:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-27 21:32:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-27 21:32:30,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:30,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804447531] [2021-12-27 21:32:30,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804447531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386129660] [2021-12-27 21:32:30,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:32:30,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:30,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:30,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:32:30,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-27 21:32:30,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:32:30,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:32:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-27 21:32:30,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:30,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:32:30,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:30,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:30,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:30,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:30,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:30,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:30,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:30,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:30,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:30,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:30,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:30,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:31,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-27 21:32:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-27 21:32:31,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:31,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386129660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:31,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:32:31,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-27 21:32:31,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383140549] [2021-12-27 21:32:31,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:31,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-27 21:32:31,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-27 21:32:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-27 21:32:31,372 INFO L87 Difference]: Start difference. First operand 2301 states and 3643 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-27 21:32:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:32,633 INFO L93 Difference]: Finished difference Result 2453 states and 3835 transitions. [2021-12-27 21:32:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-27 21:32:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 79 [2021-12-27 21:32:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:32,641 INFO L225 Difference]: With dead ends: 2453 [2021-12-27 21:32:32,641 INFO L226 Difference]: Without dead ends: 2451 [2021-12-27 21:32:32,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 111 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-12-27 21:32:32,644 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 202 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:32,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 439 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 600 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2021-12-27 21:32:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-12-27 21:32:33,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1631. [2021-12-27 21:32:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1164 states have (on average 1.4355670103092784) internal successors, (1671), 1170 states have internal predecessors, (1671), 439 states have call successors, (439), 27 states have call predecessors, (439), 27 states have return successors, (439), 433 states have call predecessors, (439), 439 states have call successors, (439) [2021-12-27 21:32:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2549 transitions. [2021-12-27 21:32:33,069 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2549 transitions. Word has length 79 [2021-12-27 21:32:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:33,069 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2549 transitions. [2021-12-27 21:32:33,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-27 21:32:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2549 transitions. [2021-12-27 21:32:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-27 21:32:33,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:33,072 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:33,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:33,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-27 21:32:33,296 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:33,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:33,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1603227147, now seen corresponding path program 2 times [2021-12-27 21:32:33,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:33,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588992563] [2021-12-27 21:32:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:33,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:32:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:32:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:32:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-27 21:32:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-27 21:32:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-27 21:32:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-27 21:32:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-27 21:32:33,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:33,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588992563] [2021-12-27 21:32:33,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588992563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:33,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310293932] [2021-12-27 21:32:33,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:32:33,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:33,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:33,444 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) [2021-12-27 21:32:33,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-27 21:32:33,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:32:33,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:32:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-27 21:32:33,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:33,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:32:33,735 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:32:33,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:33,795 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:32:33,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:33,882 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-27 21:32:33,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:33,944 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-27 21:32:33,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:34,009 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-27 21:32:34,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:34,071 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-27 21:32:34,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:34,142 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-27 21:32:34,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:34,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-27 21:32:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 63 proven. 27 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-27 21:32:34,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:34,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310293932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:34,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:32:34,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-27 21:32:34,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759033370] [2021-12-27 21:32:34,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:34,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-27 21:32:34,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-27 21:32:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-12-27 21:32:34,517 INFO L87 Difference]: Start difference. First operand 1631 states and 2549 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-27 21:32:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:35,571 INFO L93 Difference]: Finished difference Result 2351 states and 3658 transitions. [2021-12-27 21:32:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-27 21:32:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 83 [2021-12-27 21:32:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:35,579 INFO L225 Difference]: With dead ends: 2351 [2021-12-27 21:32:35,579 INFO L226 Difference]: Without dead ends: 2349 [2021-12-27 21:32:35,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1600, Unknown=0, NotChecked=0, Total=1892 [2021-12-27 21:32:35,581 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 115 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:35,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 823 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 866 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2021-12-27 21:32:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-12-27 21:32:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1757. [2021-12-27 21:32:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1248 states have (on average 1.4334935897435896) internal successors, (1789), 1258 states have internal predecessors, (1789), 477 states have call successors, (477), 31 states have call predecessors, (477), 31 states have return successors, (477), 467 states have call predecessors, (477), 477 states have call successors, (477) [2021-12-27 21:32:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2743 transitions. [2021-12-27 21:32:36,116 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2743 transitions. Word has length 83 [2021-12-27 21:32:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:36,116 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 2743 transitions. [2021-12-27 21:32:36,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-27 21:32:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2743 transitions. [2021-12-27 21:32:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-27 21:32:36,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:36,120 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:36,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:36,343 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 [2021-12-27 21:32:36,344 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1675613705, now seen corresponding path program 1 times [2021-12-27 21:32:36,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:36,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406378526] [2021-12-27 21:32:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:36,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-27 21:32:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:32:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:32:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-27 21:32:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-27 21:32:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-27 21:32:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-27 21:32:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-27 21:32:36,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:36,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406378526] [2021-12-27 21:32:36,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406378526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:36,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076357850] [2021-12-27 21:32:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:36,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:36,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:36,536 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) [2021-12-27 21:32:36,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-27 21:32:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:36,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-27 21:32:36,649 INFO L286 TraceCheckSpWp]: Computing forward predicates...