./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr3.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 e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:34:30,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:34:30,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:34:30,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:34:30,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:34:30,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:34:30,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:34:31,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:34:31,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:34:31,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:34:31,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:34:31,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:34:31,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:34:31,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:34:31,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:34:31,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:34:31,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:34:31,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:34:31,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:34:31,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:34:31,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:34:31,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:34:31,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:34:31,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:34:31,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:34:31,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:34:31,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:34:31,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:34:31,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:34:31,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:34:31,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:34:31,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:34:31,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:34:31,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:34:31,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:34:31,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:34:31,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:34:31,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:34:31,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:34:31,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:34:31,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:34:31,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:34:31,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:34:31,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:34:31,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:34:31,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:34:31,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:34:31,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:34:31,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:34:31,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:34:31,067 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:34:31,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:34:31,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:34:31,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:34:31,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:34:31,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:34:31,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:34:31,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:34:31,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:34:31,069 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:34:31,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:34:31,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:34:31,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:34:31,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:34:31,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:34:31,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:34:31,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:34:31,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:34:31,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:34:31,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:34:31,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:34:31,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:34:31,072 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:34:31,072 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:34:31,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:34:31,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:34:31,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2021-12-15 21:34:31,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:34:31,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:34:31,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:34:31,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:34:31,295 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:34:31,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2021-12-15 21:34:31,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdcf6bfca/23ac718c1119447592686d9bf63e6c01/FLAGa7ea44d3b [2021-12-15 21:34:31,662 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:34:31,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2021-12-15 21:34:31,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdcf6bfca/23ac718c1119447592686d9bf63e6c01/FLAGa7ea44d3b [2021-12-15 21:34:32,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdcf6bfca/23ac718c1119447592686d9bf63e6c01 [2021-12-15 21:34:32,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:34:32,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:34:32,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:34:32,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:34:32,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:34:32,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63337376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32, skipping insertion in model container [2021-12-15 21:34:32,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:34:32,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:34:32,264 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/pnr3.c[395,408] [2021-12-15 21:34:32,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:34:32,280 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:34:32,288 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/pnr3.c[395,408] [2021-12-15 21:34:32,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:34:32,301 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:34:32,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32 WrapperNode [2021-12-15 21:34:32,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:34:32,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:34:32,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:34:32,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:34:32,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,329 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2021-12-15 21:34:32,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:34:32,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:34:32,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:34:32,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:34:32,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:34:32,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:34:32,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:34:32,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:34:32,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (1/1) ... [2021-12-15 21:34:32,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:34:32,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:32,392 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) [2021-12-15 21:34:32,405 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 [2021-12-15 21:34:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:34:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:34:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:34:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:34:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-15 21:34:32,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-15 21:34:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:34:32,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:34:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:34:32,472 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:34:32,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:34:32,633 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:34:32,640 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:34:32,640 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 21:34:32,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:34:32 BoogieIcfgContainer [2021-12-15 21:34:32,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:34:32,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:34:32,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:34:32,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:34:32,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:34:32" (1/3) ... [2021-12-15 21:34:32,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca1fae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:34:32, skipping insertion in model container [2021-12-15 21:34:32,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:34:32" (2/3) ... [2021-12-15 21:34:32,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca1fae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:34:32, skipping insertion in model container [2021-12-15 21:34:32,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:34:32" (3/3) ... [2021-12-15 21:34:32,654 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2021-12-15 21:34:32,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:34:32,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:34:32,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:34:32,704 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 [2021-12-15 21:34:32,705 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:34:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:34:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 21:34:32,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:32,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:32,724 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:32,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1781049194, now seen corresponding path program 1 times [2021-12-15 21:34:32,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:32,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49380666] [2021-12-15 21:34:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:32,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:32,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:32,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49380666] [2021-12-15 21:34:32,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49380666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:34:32,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:34:32,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:34:32,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088476228] [2021-12-15 21:34:32,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:34:32,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:34:32,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:32,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:34:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:34:32,904 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:32,920 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-12-15 21:34:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:34:32,922 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 [2021-12-15 21:34:32,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:32,926 INFO L225 Difference]: With dead ends: 57 [2021-12-15 21:34:32,926 INFO L226 Difference]: Without dead ends: 27 [2021-12-15 21:34:32,928 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 [2021-12-15 21:34:32,930 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:32,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:34:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-15 21:34:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-15 21:34:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:34:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-15 21:34:32,951 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2021-12-15 21:34:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:32,952 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-15 21:34:32,952 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) [2021-12-15 21:34:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-15 21:34:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 21:34:32,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:32,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:32,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:34:32,954 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:32,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1807831303, now seen corresponding path program 1 times [2021-12-15 21:34:32,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:32,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185060241] [2021-12-15 21:34:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:32,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:33,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:33,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185060241] [2021-12-15 21:34:33,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185060241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:34:33,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:34:33,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 21:34:33,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385007765] [2021-12-15 21:34:33,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:34:33,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 21:34:33,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 21:34:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:34:33,069 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:33,134 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-15 21:34:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:34:33,134 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 [2021-12-15 21:34:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:33,135 INFO L225 Difference]: With dead ends: 45 [2021-12-15 21:34:33,135 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 21:34:33,136 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 [2021-12-15 21:34:33,137 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:33,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 21:34:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-12-15 21:34:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:34:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-15 21:34:33,145 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-12-15 21:34:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:33,145 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-15 21:34:33,145 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) [2021-12-15 21:34:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-15 21:34:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 21:34:33,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:33,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:33,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:34:33,147 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1367310263, now seen corresponding path program 1 times [2021-12-15 21:34:33,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:33,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665087152] [2021-12-15 21:34:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:33,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:33,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:33,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:33,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665087152] [2021-12-15 21:34:33,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665087152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774905367] [2021-12-15 21:34:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:33,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:33,307 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) [2021-12-15 21:34:33,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:34:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:33,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 21:34:33,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:33,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:33,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:34:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:33,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-15 21:34:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:33,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:33,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 21:34:33,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-15 21:34:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:33,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774905367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:33,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:33,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2021-12-15 21:34:33,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238258668] [2021-12-15 21:34:33,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:33,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 21:34:33,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 21:34:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:34:33,828 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-15 21:34:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:34,102 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2021-12-15 21:34:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 21:34:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2021-12-15 21:34:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:34,108 INFO L225 Difference]: With dead ends: 84 [2021-12-15 21:34:34,108 INFO L226 Difference]: Without dead ends: 82 [2021-12-15 21:34:34,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:34:34,113 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:34,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 181 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:34:34,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-15 21:34:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2021-12-15 21:34:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 21:34:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-12-15 21:34:34,128 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 31 [2021-12-15 21:34:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:34,129 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-12-15 21:34:34,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-15 21:34:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-12-15 21:34:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 21:34:34,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:34,130 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:34,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:34,330 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 [2021-12-15 21:34:34,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1238713291, now seen corresponding path program 1 times [2021-12-15 21:34:34,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:34,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912112315] [2021-12-15 21:34:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:34,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:34,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:34,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:34,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:34,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912112315] [2021-12-15 21:34:34,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912112315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899585800] [2021-12-15 21:34:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:34,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:34,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:34,530 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) [2021-12-15 21:34:34,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:34:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:34,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 21:34:34,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:34,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:34,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:34,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 21:34:34,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 21:34:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 21:34:34,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:35,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-15 21:34:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-15 21:34:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:35,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899585800] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:35,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:35,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-15 21:34:35,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935442843] [2021-12-15 21:34:35,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:35,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 21:34:35,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:35,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 21:34:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:34:35,524 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-15 21:34:36,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:36,060 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2021-12-15 21:34:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 21:34:36,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2021-12-15 21:34:36,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:36,063 INFO L225 Difference]: With dead ends: 137 [2021-12-15 21:34:36,063 INFO L226 Difference]: Without dead ends: 135 [2021-12-15 21:34:36,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 21:34:36,065 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 180 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:36,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 380 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 365 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-12-15 21:34:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-15 21:34:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2021-12-15 21:34:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-15 21:34:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2021-12-15 21:34:36,084 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 31 [2021-12-15 21:34:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:36,085 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2021-12-15 21:34:36,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-15 21:34:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2021-12-15 21:34:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:34:36,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:36,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:36,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:36,316 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 [2021-12-15 21:34:36,316 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:36,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2026411713, now seen corresponding path program 1 times [2021-12-15 21:34:36,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:36,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192340249] [2021-12-15 21:34:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:36,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:36,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:36,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:36,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:36,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:36,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192340249] [2021-12-15 21:34:36,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192340249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:36,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142149142] [2021-12-15 21:34:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:36,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:36,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:36,543 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) [2021-12-15 21:34:36,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:34:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:36,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 21:34:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:36,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:36,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:36,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:34:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:36,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:36,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:34:36,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 21:34:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:36,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142149142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:36,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:36,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-15 21:34:36,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754156984] [2021-12-15 21:34:36,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:36,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 21:34:36,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 21:34:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-15 21:34:36,886 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-15 21:34:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:37,192 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2021-12-15 21:34:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 21:34:37,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-12-15 21:34:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:37,194 INFO L225 Difference]: With dead ends: 202 [2021-12-15 21:34:37,195 INFO L226 Difference]: Without dead ends: 200 [2021-12-15 21:34:37,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-15 21:34:37,196 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 81 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:37,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 224 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:34:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-15 21:34:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 105. [2021-12-15 21:34:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.35) internal successors, (108), 82 states have internal predecessors, (108), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-15 21:34:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2021-12-15 21:34:37,210 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 35 [2021-12-15 21:34:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:37,210 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2021-12-15 21:34:37,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-15 21:34:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2021-12-15 21:34:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:34:37,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:37,212 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:37,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:37,433 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 [2021-12-15 21:34:37,433 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash 680207681, now seen corresponding path program 1 times [2021-12-15 21:34:37,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:37,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232703863] [2021-12-15 21:34:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:37,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:37,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:37,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:37,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:37,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:37,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232703863] [2021-12-15 21:34:37,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232703863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:37,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896956789] [2021-12-15 21:34:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:37,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:37,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:37,593 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) [2021-12-15 21:34:37,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:34:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 21:34:37,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:37,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:37,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:37,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 21:34:37,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 21:34:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 21:34:37,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:38,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:34:38,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 21:34:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:38,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896956789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:38,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:38,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-12-15 21:34:38,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466203889] [2021-12-15 21:34:38,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:38,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 21:34:38,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:38,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 21:34:38,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-15 21:34:38,120 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-15 21:34:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:38,785 INFO L93 Difference]: Finished difference Result 306 states and 433 transitions. [2021-12-15 21:34:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-15 21:34:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2021-12-15 21:34:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:38,788 INFO L225 Difference]: With dead ends: 306 [2021-12-15 21:34:38,788 INFO L226 Difference]: Without dead ends: 304 [2021-12-15 21:34:38,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 21:34:38,789 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 179 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:38,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 446 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 506 Invalid, 0 Unknown, 69 Unchecked, 0.4s Time] [2021-12-15 21:34:38,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-15 21:34:38,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 148. [2021-12-15 21:34:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 113 states have internal predecessors, (151), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-15 21:34:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2021-12-15 21:34:38,813 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 35 [2021-12-15 21:34:38,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:38,813 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2021-12-15 21:34:38,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-15 21:34:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2021-12-15 21:34:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 21:34:38,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:38,815 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:38,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:39,031 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 [2021-12-15 21:34:39,031 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -406526155, now seen corresponding path program 2 times [2021-12-15 21:34:39,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:39,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099465498] [2021-12-15 21:34:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:39,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:39,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:39,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:39,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099465498] [2021-12-15 21:34:39,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099465498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769767615] [2021-12-15 21:34:39,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:39,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:39,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:39,125 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) [2021-12-15 21:34:39,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:34:39,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:39,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:39,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 21:34:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:39,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 21:34:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:39,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:39,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:34:39,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 21:34:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:39,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769767615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:39,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:39,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-15 21:34:39,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725573178] [2021-12-15 21:34:39,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:39,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 21:34:39,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 21:34:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:34:39,406 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:34:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:39,801 INFO L93 Difference]: Finished difference Result 629 states and 954 transitions. [2021-12-15 21:34:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 21:34:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-12-15 21:34:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:39,805 INFO L225 Difference]: With dead ends: 629 [2021-12-15 21:34:39,805 INFO L226 Difference]: Without dead ends: 627 [2021-12-15 21:34:39,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-12-15 21:34:39,807 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 73 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:39,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 320 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:34:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-12-15 21:34:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2021-12-15 21:34:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-15 21:34:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 518 transitions. [2021-12-15 21:34:39,853 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 518 transitions. Word has length 39 [2021-12-15 21:34:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:39,853 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 518 transitions. [2021-12-15 21:34:39,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:34:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 518 transitions. [2021-12-15 21:34:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 21:34:39,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:39,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:39,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-15 21:34:40,071 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 [2021-12-15 21:34:40,072 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1686389833, now seen corresponding path program 1 times [2021-12-15 21:34:40,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:40,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081626068] [2021-12-15 21:34:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:40,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:40,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:40,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:40,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:40,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:40,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081626068] [2021-12-15 21:34:40,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081626068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:40,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788053540] [2021-12-15 21:34:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:40,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:40,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:40,187 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) [2021-12-15 21:34:40,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:34:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:40,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 21:34:40,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 21:34:40,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:34:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:40,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:40,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:34:40,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 21:34:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:40,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788053540] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:40,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:40,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-15 21:34:40,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076452212] [2021-12-15 21:34:40,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:40,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 21:34:40,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:40,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 21:34:40,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-12-15 21:34:40,785 INFO L87 Difference]: Start difference. First operand 337 states and 518 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-15 21:34:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:42,459 INFO L93 Difference]: Finished difference Result 1027 states and 1566 transitions. [2021-12-15 21:34:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-15 21:34:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 39 [2021-12-15 21:34:42,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:42,465 INFO L225 Difference]: With dead ends: 1027 [2021-12-15 21:34:42,466 INFO L226 Difference]: Without dead ends: 1025 [2021-12-15 21:34:42,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 21:34:42,472 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 269 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:42,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 548 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 21:34:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-12-15 21:34:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 160. [2021-12-15 21:34:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 125 states have internal predecessors, (165), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-15 21:34:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2021-12-15 21:34:42,507 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 39 [2021-12-15 21:34:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:42,507 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2021-12-15 21:34:42,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-15 21:34:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2021-12-15 21:34:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 21:34:42,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:42,509 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:42,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:42,733 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 [2021-12-15 21:34:42,734 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash 685144619, now seen corresponding path program 3 times [2021-12-15 21:34:42,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:42,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356126189] [2021-12-15 21:34:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:42,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:42,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:42,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:42,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:42,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:42,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356126189] [2021-12-15 21:34:42,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356126189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:42,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570488282] [2021-12-15 21:34:42,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:34:42,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:42,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:42,940 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) [2021-12-15 21:34:42,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:34:43,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 21:34:43,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:43,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 21:34:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:43,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:34:44,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570488282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:44,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:44,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2021-12-15 21:34:44,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205286999] [2021-12-15 21:34:44,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:44,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 21:34:44,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 21:34:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-12-15 21:34:44,053 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-15 21:34:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:44,330 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2021-12-15 21:34:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:34:44,330 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2021-12-15 21:34:44,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:44,332 INFO L225 Difference]: With dead ends: 267 [2021-12-15 21:34:44,332 INFO L226 Difference]: Without dead ends: 247 [2021-12-15 21:34:44,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:34:44,334 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 224 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:44,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 130 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:34:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-15 21:34:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2021-12-15 21:34:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-15 21:34:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2021-12-15 21:34:44,349 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 43 [2021-12-15 21:34:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:44,350 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2021-12-15 21:34:44,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-15 21:34:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2021-12-15 21:34:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 21:34:44,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:44,352 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:44,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 21:34:44,562 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 [2021-12-15 21:34:44,563 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash 466828189, now seen corresponding path program 2 times [2021-12-15 21:34:44,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:44,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920797223] [2021-12-15 21:34:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:44,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:44,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:44,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:44,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:44,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:34:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:44,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:34:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:44,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:34:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:34:44,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920797223] [2021-12-15 21:34:44,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920797223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843420644] [2021-12-15 21:34:44,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:44,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:44,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:44,756 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) [2021-12-15 21:34:44,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:34:44,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:44,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:34:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:44,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:44,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:44,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:44,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:44,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:45,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:45,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:34:45,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:45,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:34:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:45,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:34:45,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 21:34:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 21:34:45,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:46,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843420644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:46,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:34:46,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-15 21:34:46,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864204314] [2021-12-15 21:34:46,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:46,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:34:46,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:46,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:34:46,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=316, Unknown=1, NotChecked=0, Total=380 [2021-12-15 21:34:46,018 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-15 21:34:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:46,308 INFO L93 Difference]: Finished difference Result 238 states and 328 transitions. [2021-12-15 21:34:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 21:34:46,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2021-12-15 21:34:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:46,310 INFO L225 Difference]: With dead ends: 238 [2021-12-15 21:34:46,310 INFO L226 Difference]: Without dead ends: 236 [2021-12-15 21:34:46,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=537, Unknown=1, NotChecked=0, Total=650 [2021-12-15 21:34:46,311 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 95 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:46,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 426 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 335 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-12-15 21:34:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-15 21:34:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 193. [2021-12-15 21:34:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 150 states have (on average 1.34) internal successors, (201), 150 states have internal predecessors, (201), 37 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-15 21:34:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2021-12-15 21:34:46,330 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 51 [2021-12-15 21:34:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:46,331 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2021-12-15 21:34:46,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-15 21:34:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2021-12-15 21:34:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 21:34:46,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:46,332 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-12-15 21:34:46,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:46,549 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 [2021-12-15 21:34:46,550 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2053131745, now seen corresponding path program 1 times [2021-12-15 21:34:46,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:46,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301091619] [2021-12-15 21:34:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:46,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:46,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:46,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:46,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:46,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:34:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:46,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:34:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:46,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:34:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:34:46,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:46,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301091619] [2021-12-15 21:34:46,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301091619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:46,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292927362] [2021-12-15 21:34:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:46,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:46,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:46,740 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) [2021-12-15 21:34:46,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:34:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:34:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:46,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:46,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:47,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:47,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:47,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:34:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:34:47,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:47,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:34:47,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 21:34:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 21:34:47,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:48,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292927362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:48,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:34:48,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-15 21:34:48,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568249111] [2021-12-15 21:34:48,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:48,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 21:34:48,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 21:34:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=352, Unknown=1, NotChecked=0, Total=420 [2021-12-15 21:34:48,118 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-15 21:34:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:48,866 INFO L93 Difference]: Finished difference Result 347 states and 493 transitions. [2021-12-15 21:34:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 21:34:48,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2021-12-15 21:34:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:48,868 INFO L225 Difference]: With dead ends: 347 [2021-12-15 21:34:48,869 INFO L226 Difference]: Without dead ends: 345 [2021-12-15 21:34:48,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 71 SyntacticMatches, 13 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=289, Invalid=1432, Unknown=1, NotChecked=0, Total=1722 [2021-12-15 21:34:48,870 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 112 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:48,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 493 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 554 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2021-12-15 21:34:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-15 21:34:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2021-12-15 21:34:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 150 states have (on average 1.34) internal successors, (201), 151 states have internal predecessors, (201), 39 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-15 21:34:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 279 transitions. [2021-12-15 21:34:48,889 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 279 transitions. Word has length 51 [2021-12-15 21:34:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:48,889 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 279 transitions. [2021-12-15 21:34:48,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-15 21:34:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 279 transitions. [2021-12-15 21:34:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 21:34:48,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:48,890 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:48,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:49,103 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 [2021-12-15 21:34:49,104 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1257132653, now seen corresponding path program 2 times [2021-12-15 21:34:49,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:49,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254304584] [2021-12-15 21:34:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:49,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:49,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:49,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:49,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:34:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:49,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:34:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:49,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:34:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:34:49,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254304584] [2021-12-15 21:34:49,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254304584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065866744] [2021-12-15 21:34:49,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:49,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:49,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:49,300 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) [2021-12-15 21:34:49,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 21:34:49,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:49,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:34:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:49,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:49,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:49,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:49,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:49,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:49,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:49,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:49,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:34:49,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-15 21:34:49,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 21:34:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 21:34:49,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:50,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065866744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:50,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:34:50,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-15 21:34:50,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401787296] [2021-12-15 21:34:50,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:50,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 21:34:50,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 21:34:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=390, Unknown=1, NotChecked=0, Total=462 [2021-12-15 21:34:50,302 INFO L87 Difference]: Start difference. First operand 195 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-15 21:34:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:50,968 INFO L93 Difference]: Finished difference Result 256 states and 357 transitions. [2021-12-15 21:34:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 21:34:50,969 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), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 55 [2021-12-15 21:34:50,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:50,970 INFO L225 Difference]: With dead ends: 256 [2021-12-15 21:34:50,970 INFO L226 Difference]: Without dead ends: 254 [2021-12-15 21:34:50,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=1434, Unknown=1, NotChecked=0, Total=1722 [2021-12-15 21:34:50,971 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 142 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:50,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 413 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 502 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2021-12-15 21:34:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-15 21:34:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 155. [2021-12-15 21:34:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 118 states have (on average 1.3135593220338984) internal successors, (155), 119 states have internal predecessors, (155), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-15 21:34:50,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 215 transitions. [2021-12-15 21:34:50,985 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 215 transitions. Word has length 55 [2021-12-15 21:34:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:50,986 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 215 transitions. [2021-12-15 21:34:50,986 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), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-15 21:34:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 215 transitions. [2021-12-15 21:34:50,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 21:34:50,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:50,987 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:51,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-15 21:34:51,204 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 [2021-12-15 21:34:51,204 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:51,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1929317243, now seen corresponding path program 4 times [2021-12-15 21:34:51,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:51,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068677565] [2021-12-15 21:34:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:51,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:51,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:51,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:51,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:51,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:34:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:51,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:34:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:51,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:34:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:34:51,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:51,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068677565] [2021-12-15 21:34:51,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068677565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325231706] [2021-12-15 21:34:51,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:34:51,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:51,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:51,452 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) [2021-12-15 21:34:51,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 21:34:51,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:34:51,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:34:51,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:51,626 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:34:51,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:34:51,652 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 21:34:51,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:34:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:34:51,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:34:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 21:34:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:34:51,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325231706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:51,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:51,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-12-15 21:34:51,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197803297] [2021-12-15 21:34:51,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:51,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 21:34:51,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 21:34:51,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-15 21:34:51,926 INFO L87 Difference]: Start difference. First operand 155 states and 215 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-15 21:34:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:53,202 INFO L93 Difference]: Finished difference Result 1466 states and 2277 transitions. [2021-12-15 21:34:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-15 21:34:53,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 63 [2021-12-15 21:34:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:53,207 INFO L225 Difference]: With dead ends: 1466 [2021-12-15 21:34:53,207 INFO L226 Difference]: Without dead ends: 1464 [2021-12-15 21:34:53,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=682, Invalid=3874, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 21:34:53,210 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 291 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:53,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 716 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 21:34:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-12-15 21:34:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 279. [2021-12-15 21:34:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 210 states have (on average 1.380952380952381) internal successors, (290), 211 states have internal predecessors, (290), 62 states have call successors, (62), 6 states have call predecessors, (62), 6 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2021-12-15 21:34:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 414 transitions. [2021-12-15 21:34:53,261 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 414 transitions. Word has length 63 [2021-12-15 21:34:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:53,261 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 414 transitions. [2021-12-15 21:34:53,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-15 21:34:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 414 transitions. [2021-12-15 21:34:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 21:34:53,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:53,264 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:53,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:53,479 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 [2021-12-15 21:34:53,479 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1664050179, now seen corresponding path program 1 times [2021-12-15 21:34:53,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:53,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162164346] [2021-12-15 21:34:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:53,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:34:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:34:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:34:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:34:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:34:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:34:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:34:53,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:53,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162164346] [2021-12-15 21:34:53,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162164346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:53,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879760828] [2021-12-15 21:34:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:53,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:53,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:53,704 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) [2021-12-15 21:34:53,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 21:34:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 21:34:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:53,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:34:53,985 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:34:53,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:34:54,050 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 21:34:54,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 21:34:54,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:34:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 21:34:54,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:54,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:34:54,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 21:34:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:34:54,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879760828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:54,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:54,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2021-12-15 21:34:54,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784027763] [2021-12-15 21:34:54,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:54,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 21:34:54,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 21:34:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-12-15 21:34:54,959 INFO L87 Difference]: Start difference. First operand 279 states and 414 transitions. Second operand has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-15 21:35:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:02,013 INFO L93 Difference]: Finished difference Result 1096 states and 1647 transitions. [2021-12-15 21:35:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-15 21:35:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 63 [2021-12-15 21:35:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:02,019 INFO L225 Difference]: With dead ends: 1096 [2021-12-15 21:35:02,019 INFO L226 Difference]: Without dead ends: 1094 [2021-12-15 21:35:02,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 120 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=738, Invalid=5738, Unknown=4, NotChecked=0, Total=6480 [2021-12-15 21:35:02,021 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 397 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:02,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1093 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2110 Invalid, 0 Unknown, 147 Unchecked, 1.0s Time] [2021-12-15 21:35:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-12-15 21:35:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 332. [2021-12-15 21:35:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 248 states have (on average 1.3870967741935485) internal successors, (344), 249 states have internal predecessors, (344), 74 states have call successors, (74), 9 states have call predecessors, (74), 9 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2021-12-15 21:35:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 492 transitions. [2021-12-15 21:35:02,060 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 492 transitions. Word has length 63 [2021-12-15 21:35:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:02,060 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 492 transitions. [2021-12-15 21:35:02,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-15 21:35:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 492 transitions. [2021-12-15 21:35:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 21:35:02,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:02,062 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:02,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:02,276 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 [2021-12-15 21:35:02,276 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2043081871, now seen corresponding path program 5 times [2021-12-15 21:35:02,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:02,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47038978] [2021-12-15 21:35:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:02,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:02,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:35:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:02,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:35:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:02,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:35:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:02,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:35:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:02,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:35:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:35:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:35:02,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:02,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47038978] [2021-12-15 21:35:02,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47038978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:02,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683664740] [2021-12-15 21:35:02,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:35:02,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:02,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:02,409 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) [2021-12-15 21:35:02,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 21:35:02,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 21:35:02,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:35:02,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:02,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:35:02,623 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-15 21:35:02,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-15 21:35:02,738 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-15 21:35:02,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-15 21:35:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:35:02,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:02,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:35:02,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-15 21:35:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:35:02,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683664740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:02,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:02,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2021-12-15 21:35:02,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807014145] [2021-12-15 21:35:02,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:02,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:35:02,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:02,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:35:02,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:35:02,909 INFO L87 Difference]: Start difference. First operand 332 states and 492 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-15 21:35:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:05,568 INFO L93 Difference]: Finished difference Result 3750 states and 5916 transitions. [2021-12-15 21:35:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-15 21:35:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2021-12-15 21:35:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:05,583 INFO L225 Difference]: With dead ends: 3750 [2021-12-15 21:35:05,584 INFO L226 Difference]: Without dead ends: 3748 [2021-12-15 21:35:05,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=721, Invalid=5441, Unknown=0, NotChecked=0, Total=6162 [2021-12-15 21:35:05,592 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 159 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:05,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1186 Invalid, 2727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 21:35:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-12-15 21:35:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 790. [2021-12-15 21:35:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 586 states have (on average 1.4351535836177474) internal successors, (841), 587 states have internal predecessors, (841), 194 states have call successors, (194), 9 states have call predecessors, (194), 9 states have return successors, (194), 193 states have call predecessors, (194), 194 states have call successors, (194) [2021-12-15 21:35:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1229 transitions. [2021-12-15 21:35:05,712 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1229 transitions. Word has length 67 [2021-12-15 21:35:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:05,713 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 1229 transitions. [2021-12-15 21:35:05,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-15 21:35:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1229 transitions. [2021-12-15 21:35:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 21:35:05,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:05,714 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:05,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-15 21:35:05,927 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 [2021-12-15 21:35:05,927 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash -656878477, now seen corresponding path program 1 times [2021-12-15 21:35:05,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:05,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579265229] [2021-12-15 21:35:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:05,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:06,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:35:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:06,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:35:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:06,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:35:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:06,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:35:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:06,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:35:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:35:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:35:06,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579265229] [2021-12-15 21:35:06,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579265229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658156027] [2021-12-15 21:35:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:06,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:06,131 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) [2021-12-15 21:35:06,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 21:35:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:06,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 21:35:06,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:06,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:35:06,962 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 21:35:06,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 21:35:07,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 21:35:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 21:35:07,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:07,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-15 21:35:07,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-15 21:35:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:35:07,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658156027] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:07,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:07,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-15 21:35:07,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2866959] [2021-12-15 21:35:07,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:07,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 21:35:07,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:07,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 21:35:07,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=928, Unknown=1, NotChecked=0, Total=1056 [2021-12-15 21:35:07,928 INFO L87 Difference]: Start difference. First operand 790 states and 1229 transitions. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-15 21:35:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:31,188 INFO L93 Difference]: Finished difference Result 3737 states and 5848 transitions. [2021-12-15 21:35:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-15 21:35:31,189 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 67 [2021-12-15 21:35:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:31,199 INFO L225 Difference]: With dead ends: 3737 [2021-12-15 21:35:31,199 INFO L226 Difference]: Without dead ends: 3735 [2021-12-15 21:35:31,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4495 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=1481, Invalid=11162, Unknown=13, NotChecked=0, Total=12656 [2021-12-15 21:35:31,202 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 486 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 3417 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 4508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 3417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:31,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1713 Invalid, 4508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 3417 Invalid, 0 Unknown, 224 Unchecked, 1.7s Time] [2021-12-15 21:35:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2021-12-15 21:35:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 978. [2021-12-15 21:35:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 722 states have (on average 1.4418282548476453) internal successors, (1041), 723 states have internal predecessors, (1041), 242 states have call successors, (242), 13 states have call predecessors, (242), 13 states have return successors, (242), 241 states have call predecessors, (242), 242 states have call successors, (242) [2021-12-15 21:35:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1525 transitions. [2021-12-15 21:35:31,360 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1525 transitions. Word has length 67 [2021-12-15 21:35:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:31,360 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1525 transitions. [2021-12-15 21:35:31,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-15 21:35:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1525 transitions. [2021-12-15 21:35:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 21:35:31,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:31,362 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:31,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:31,580 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 [2021-12-15 21:35:31,580 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:31,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1705453549, now seen corresponding path program 1 times [2021-12-15 21:35:31,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:31,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257812138] [2021-12-15 21:35:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:31,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:35:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:35:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:35:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:35:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:35:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:35:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-15 21:35:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-15 21:35:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-15 21:35:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-15 21:35:31,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257812138] [2021-12-15 21:35:31,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257812138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320111451] [2021-12-15 21:35:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:31,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:31,838 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) [2021-12-15 21:35:31,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 21:35:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-15 21:35:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:32,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-15 21:35:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:32,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:35:32,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:32,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-15 21:35:32,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:32,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:35:32,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:32,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:35:32,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:32,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:35:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:32,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:35:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:32,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:35:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:35:32,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-15 21:35:32,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 21:35:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 26 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 21:35:32,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:33,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320111451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:33,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:35:33,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-12-15 21:35:33,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244324674] [2021-12-15 21:35:33,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:33,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 21:35:33,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 21:35:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=378, Unknown=1, NotChecked=0, Total=462 [2021-12-15 21:35:33,637 INFO L87 Difference]: Start difference. First operand 978 states and 1525 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-15 21:35:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:34,163 INFO L93 Difference]: Finished difference Result 1082 states and 1625 transitions. [2021-12-15 21:35:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 21:35:34,164 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), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 71 [2021-12-15 21:35:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:34,167 INFO L225 Difference]: With dead ends: 1082 [2021-12-15 21:35:34,167 INFO L226 Difference]: Without dead ends: 1080 [2021-12-15 21:35:34,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 20 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1098, Unknown=1, NotChecked=0, Total=1332 [2021-12-15 21:35:34,168 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 108 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:34,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 403 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 530 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2021-12-15 21:35:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-12-15 21:35:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 433. [2021-12-15 21:35:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 324 states have (on average 1.3888888888888888) internal successors, (450), 325 states have internal predecessors, (450), 97 states have call successors, (97), 11 states have call predecessors, (97), 11 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2021-12-15 21:35:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 644 transitions. [2021-12-15 21:35:34,249 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 644 transitions. Word has length 71 [2021-12-15 21:35:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:34,249 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 644 transitions. [2021-12-15 21:35:34,249 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), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-15 21:35:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 644 transitions. [2021-12-15 21:35:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 21:35:34,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:34,250 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:34,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:34,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 21:35:34,469 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:34,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1810243687, now seen corresponding path program 6 times [2021-12-15 21:35:34,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:34,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187653472] [2021-12-15 21:35:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:34,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:34,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-15 21:35:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-15 21:35:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:34,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:35:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:35:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:34,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-15 21:35:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-15 21:35:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:35:34,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:34,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187653472] [2021-12-15 21:35:34,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187653472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:34,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98323963] [2021-12-15 21:35:34,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:35:34,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:34,636 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:35:34,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 21:35:34,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 21:35:34,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 21:35:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:34,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 21:35:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:35:35,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:35:35,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-15 21:35:35,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-15 21:35:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:35:35,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98323963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:35:35,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:35:35,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-12-15 21:35:35,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639826648] [2021-12-15 21:35:35,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:35:35,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 21:35:35,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:35:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 21:35:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-12-15 21:35:35,277 INFO L87 Difference]: Start difference. First operand 433 states and 644 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)