./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ncomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ncomp.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 121ef5d6893dcc51dc4e8996443da3489b936a9e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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-fpi/ncomp.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 121ef5d6893dcc51dc4e8996443da3489b936a9e ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 19:22:35,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:22:35,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:22:35,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:22:35,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:22:35,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:22:35,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:22:35,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:22:35,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:22:35,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:22:35,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:22:35,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:22:35,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:22:35,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:22:35,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:22:35,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:22:35,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:22:35,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:22:35,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:22:35,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:22:35,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:22:35,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:22:35,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:22:35,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:22:35,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:22:35,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:22:35,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:22:35,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:22:35,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:22:35,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:22:35,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:22:35,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:22:35,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:22:35,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:22:35,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:22:35,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:22:35,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:22:35,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:22:35,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:22:35,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:22:35,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:22:35,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:22:35,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:22:35,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:22:35,223 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:22:35,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:22:35,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:22:35,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:22:35,225 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:22:35,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:22:35,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:22:35,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:22:35,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:22:35,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:22:35,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:22:35,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:22:35,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:22:35,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:22:35,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:22:35,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:22:35,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:22:35,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:22:35,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:22:35,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:22:35,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:22:35,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:22:35,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:22:35,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:22:35,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:22:35,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:22:35,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:22:35,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:22:35,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 121ef5d6893dcc51dc4e8996443da3489b936a9e [2021-08-25 19:22:35,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:22:35,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:22:35,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:22:35,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:22:35,511 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:22:35,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ncomp.c [2021-08-25 19:22:35,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f6b6356/2d7707651b6e438596c0d11042104443/FLAG2684159a1 [2021-08-25 19:22:35,934 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:22:35,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c [2021-08-25 19:22:35,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f6b6356/2d7707651b6e438596c0d11042104443/FLAG2684159a1 [2021-08-25 19:22:35,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f6b6356/2d7707651b6e438596c0d11042104443 [2021-08-25 19:22:35,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:22:35,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:22:35,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:22:35,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:22:35,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:22:35,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:22:35" (1/1) ... [2021-08-25 19:22:35,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89cfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:35, skipping insertion in model container [2021-08-25 19:22:35,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:22:35" (1/1) ... [2021-08-25 19:22:35,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:22:35,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:22:36,069 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c[588,601] [2021-08-25 19:22:36,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:22:36,096 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:22:36,144 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c[588,601] [2021-08-25 19:22:36,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:22:36,181 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:22:36,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36 WrapperNode [2021-08-25 19:22:36,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:22:36,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:22:36,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:22:36,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:22:36,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:22:36,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:22:36,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:22:36,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:22:36,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:22:36,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:22:36,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:22:36,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:22:36,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (1/1) ... [2021-08-25 19:22:36,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:22:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:36,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 19:22:36,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 19:22:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:22:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:22:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:22:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:22:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:22:36,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:22:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:22:36,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:22:36,615 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-08-25 19:22:36,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:22:36 BoogieIcfgContainer [2021-08-25 19:22:36,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:22:36,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:22:36,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:22:36,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:22:36,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:22:35" (1/3) ... [2021-08-25 19:22:36,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e09d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:22:36, skipping insertion in model container [2021-08-25 19:22:36,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:22:36" (2/3) ... [2021-08-25 19:22:36,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e09d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:22:36, skipping insertion in model container [2021-08-25 19:22:36,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:22:36" (3/3) ... [2021-08-25 19:22:36,624 INFO L111 eAbstractionObserver]: Analyzing ICFG ncomp.c [2021-08-25 19:22:36,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:22:36,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:22:36,667 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:22:36,672 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 19:22:36,672 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:22:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:22:36,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:36,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:36,687 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2021-08-25 19:22:36,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:36,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309045967] [2021-08-25 19:22:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:36,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:22:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:22:36,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:36,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309045967] [2021-08-25 19:22:36,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309045967] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:22:36,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:22:36,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:22:36,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748488635] [2021-08-25 19:22:36,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:22:36,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:36,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:22:36,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:22:36,835 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:36,849 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-08-25 19:22:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:22:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-08-25 19:22:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:36,855 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:22:36,855 INFO L226 Difference]: Without dead ends: 20 [2021-08-25 19:22:36,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:22:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-25 19:22:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-25 19:22:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-08-25 19:22:36,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-08-25 19:22:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:36,879 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-08-25 19:22:36,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-08-25 19:22:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:22:36,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:36,880 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:36,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:22:36,881 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2021-08-25 19:22:36,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:36,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585384731] [2021-08-25 19:22:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:36,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:36,910 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:36,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611755154] [2021-08-25 19:22:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:36,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:36,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:36,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:22:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:22:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:22:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:22:37,215 INFO L354 Elim1Store]: treesize reduction 55, result has 40.9 percent of original size [2021-08-25 19:22:37,216 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 2 case distinctions, treesize of input 59 treesize of output 45 [2021-08-25 19:22:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:22:37,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:37,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585384731] [2021-08-25 19:22:37,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:22:37,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611755154] [2021-08-25 19:22:37,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611755154] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:22:37,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:22:37,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:22:37,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654206844] [2021-08-25 19:22:37,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:22:37,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:37,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:22:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:22:37,444 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:37,544 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-08-25 19:22:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:22:37,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-08-25 19:22:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:37,546 INFO L225 Difference]: With dead ends: 39 [2021-08-25 19:22:37,546 INFO L226 Difference]: Without dead ends: 37 [2021-08-25 19:22:37,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:22:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-25 19:22:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-08-25 19:22:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-08-25 19:22:37,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2021-08-25 19:22:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:37,556 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-08-25 19:22:37,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-08-25 19:22:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:22:37,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:37,561 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:37,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:22:37,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:37,777 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:37,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1850906398, now seen corresponding path program 1 times [2021-08-25 19:22:37,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:37,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755101853] [2021-08-25 19:22:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:37,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:37,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:37,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410630519] [2021-08-25 19:22:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:37,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:37,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:37,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:37,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 19:22:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:22:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:22:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:22:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:22:37,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:37,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755101853] [2021-08-25 19:22:37,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:22:37,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410630519] [2021-08-25 19:22:37,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410630519] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:22:37,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:22:37,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:22:37,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205969854] [2021-08-25 19:22:37,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:22:37,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:37,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:22:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:22:37,977 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:38,088 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-08-25 19:22:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:22:38,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2021-08-25 19:22:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:38,089 INFO L225 Difference]: With dead ends: 62 [2021-08-25 19:22:38,089 INFO L226 Difference]: Without dead ends: 50 [2021-08-25 19:22:38,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:22:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-25 19:22:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2021-08-25 19:22:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-08-25 19:22:38,093 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2021-08-25 19:22:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:38,093 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-08-25 19:22:38,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-08-25 19:22:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:22:38,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:38,094 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:38,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:22:38,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-25 19:22:38,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:38,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1060218526, now seen corresponding path program 1 times [2021-08-25 19:22:38,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:38,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047029420] [2021-08-25 19:22:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:38,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:38,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:38,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174239476] [2021-08-25 19:22:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:38,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:38,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:38,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:38,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 19:22:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:22:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:22:38,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:22:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:22:38,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:38,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047029420] [2021-08-25 19:22:38,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:22:38,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174239476] [2021-08-25 19:22:38,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174239476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:22:38,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:22:38,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 19:22:38,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458250645] [2021-08-25 19:22:38,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:22:38,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:22:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:22:38,567 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:38,672 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-08-25 19:22:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:22:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2021-08-25 19:22:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:38,673 INFO L225 Difference]: With dead ends: 53 [2021-08-25 19:22:38,673 INFO L226 Difference]: Without dead ends: 44 [2021-08-25 19:22:38,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:22:38,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-25 19:22:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-08-25 19:22:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-25 19:22:38,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2021-08-25 19:22:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:38,677 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-25 19:22:38,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-25 19:22:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:22:38,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:38,677 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:38,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:22:38,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:38,891 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:38,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1120615462, now seen corresponding path program 1 times [2021-08-25 19:22:38,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:38,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255690089] [2021-08-25 19:22:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:38,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:38,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:38,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710559498] [2021-08-25 19:22:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:38,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:38,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:38,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:38,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 19:22:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:22:38,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 19:22:38,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:22:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:22:39,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255690089] [2021-08-25 19:22:39,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:22:39,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710559498] [2021-08-25 19:22:39,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710559498] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:22:39,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:22:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-25 19:22:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51322169] [2021-08-25 19:22:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 19:22:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 19:22:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:22:39,152 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:39,281 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-08-25 19:22:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:22:39,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-08-25 19:22:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:39,282 INFO L225 Difference]: With dead ends: 48 [2021-08-25 19:22:39,282 INFO L226 Difference]: Without dead ends: 32 [2021-08-25 19:22:39,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:22:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-25 19:22:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-25 19:22:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:22:39,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-08-25 19:22:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:39,284 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:22:39,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:22:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:22:39,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:39,285 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:39,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-25 19:22:39,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:39,507 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:39,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:39,507 INFO L82 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2021-08-25 19:22:39,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:39,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922108857] [2021-08-25 19:22:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:39,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:39,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:39,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846409823] [2021-08-25 19:22:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:39,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:39,525 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:39,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 19:22:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:22:39,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-25 19:22:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:22:39,749 INFO L354 Elim1Store]: treesize reduction 47, result has 42.0 percent of original size [2021-08-25 19:22:39,750 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 2 case distinctions, treesize of input 59 treesize of output 41 [2021-08-25 19:22:39,790 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 14 treesize of output 12 [2021-08-25 19:22:39,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:22:39,934 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-08-25 19:22:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 60 [2021-08-25 19:22:40,394 INFO L354 Elim1Store]: treesize reduction 96, result has 29.4 percent of original size [2021-08-25 19:22:40,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 92 [2021-08-25 19:22:43,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:22:43,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:22:43,426 INFO L354 Elim1Store]: treesize reduction 180, result has 11.8 percent of original size [2021-08-25 19:22:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 135 treesize of output 114 [2021-08-25 19:22:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:22:49,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:49,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922108857] [2021-08-25 19:22:49,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:22:49,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846409823] [2021-08-25 19:22:49,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846409823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:22:49,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:22:49,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 19:22:49,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674210338] [2021-08-25 19:22:49,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:22:49,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:49,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:22:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=66, Unknown=4, NotChecked=0, Total=90 [2021-08-25 19:22:49,771 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:54,711 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-08-25 19:22:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 19:22:54,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 20 [2021-08-25 19:22:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:54,712 INFO L225 Difference]: With dead ends: 47 [2021-08-25 19:22:54,712 INFO L226 Difference]: Without dead ends: 45 [2021-08-25 19:22:54,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2109.4ms TimeCoverageRelationStatistics Valid=30, Invalid=98, Unknown=4, NotChecked=0, Total=132 [2021-08-25 19:22:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-25 19:22:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-08-25 19:22:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-25 19:22:54,717 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-08-25 19:22:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:54,717 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-25 19:22:54,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-25 19:22:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:22:54,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:54,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:54,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-25 19:22:54,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:54,921 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash 859342364, now seen corresponding path program 2 times [2021-08-25 19:22:54,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:54,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674760161] [2021-08-25 19:22:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:54,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:54,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:54,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460729070] [2021-08-25 19:22:54,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:22:54,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:54,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:54,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 19:22:55,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:22:55,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:22:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:22:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:22:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:22:55,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:55,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674760161] [2021-08-25 19:22:55,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:22:55,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460729070] [2021-08-25 19:22:55,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460729070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:22:55,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:22:55,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:22:55,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107588651] [2021-08-25 19:22:55,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:22:55,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:22:55,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:22:55,325 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:55,472 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-08-25 19:22:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:22:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-08-25 19:22:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:55,473 INFO L225 Difference]: With dead ends: 81 [2021-08-25 19:22:55,474 INFO L226 Difference]: Without dead ends: 68 [2021-08-25 19:22:55,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:22:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-25 19:22:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 42. [2021-08-25 19:22:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-08-25 19:22:55,478 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2021-08-25 19:22:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:55,478 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-08-25 19:22:55,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-08-25 19:22:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:22:55,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:55,479 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:55,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 19:22:55,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:55,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash 803751580, now seen corresponding path program 3 times [2021-08-25 19:22:55,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:55,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295175501] [2021-08-25 19:22:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:55,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:55,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:55,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011729764] [2021-08-25 19:22:55,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:22:55,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:55,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:55,709 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:55,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 19:22:55,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:22:55,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:22:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:22:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:22:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:22:56,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:56,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295175501] [2021-08-25 19:22:56,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:22:56,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011729764] [2021-08-25 19:22:56,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011729764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:22:56,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:22:56,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:22:56,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487831981] [2021-08-25 19:22:56,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:22:56,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:56,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:22:56,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:22:56,120 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:56,281 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-08-25 19:22:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:22:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-08-25 19:22:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:56,282 INFO L225 Difference]: With dead ends: 71 [2021-08-25 19:22:56,282 INFO L226 Difference]: Without dead ends: 60 [2021-08-25 19:22:56,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:22:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-25 19:22:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2021-08-25 19:22:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-08-25 19:22:56,286 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2021-08-25 19:22:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:56,286 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-08-25 19:22:56,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-08-25 19:22:56,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:22:56,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:56,291 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:56,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:22:56,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:56,493 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2021-08-25 19:22:56,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:56,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981472162] [2021-08-25 19:22:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:56,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:56,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:56,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384599046] [2021-08-25 19:22:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:56,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:56,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:56,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:56,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 19:22:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:22:56,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-25 19:22:56,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:22:56,854 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:22:56,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 19 [2021-08-25 19:22:56,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 22 [2021-08-25 19:22:56,959 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-25 19:22:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 42 [2021-08-25 19:22:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:22:57,248 INFO L354 Elim1Store]: treesize reduction 128, result has 11.7 percent of original size [2021-08-25 19:22:57,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 62 treesize of output 62 [2021-08-25 19:22:57,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:22:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:22:57,610 INFO L354 Elim1Store]: treesize reduction 180, result has 11.8 percent of original size [2021-08-25 19:22:57,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 79 treesize of output 78 [2021-08-25 19:22:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:22:58,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:22:58,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981472162] [2021-08-25 19:22:58,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:22:58,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384599046] [2021-08-25 19:22:58,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384599046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:22:58,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:22:58,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 19:22:58,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111560520] [2021-08-25 19:22:58,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 19:22:58,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:22:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 19:22:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:22:58,579 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:59,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:22:59,471 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-08-25 19:22:59,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 19:22:59,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 24 [2021-08-25 19:22:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:22:59,472 INFO L225 Difference]: With dead ends: 55 [2021-08-25 19:22:59,472 INFO L226 Difference]: Without dead ends: 53 [2021-08-25 19:22:59,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 754.8ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-25 19:22:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-25 19:22:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2021-08-25 19:22:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-08-25 19:22:59,483 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 24 [2021-08-25 19:22:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:22:59,483 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-08-25 19:22:59,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:22:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-08-25 19:22:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 19:22:59,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:22:59,484 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:22:59,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 19:22:59,688 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,SelfDestructingSolverStorable8 [2021-08-25 19:22:59,689 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:22:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:22:59,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 4 times [2021-08-25 19:22:59,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:22:59,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446584692] [2021-08-25 19:22:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:22:59,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:22:59,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:22:59,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171477742] [2021-08-25 19:22:59,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:22:59,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:22:59,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:22:59,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:22:59,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 19:23:00,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:23:00,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:23:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-25 19:23:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:23:00,357 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-08-25 19:23:00,357 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 2 case distinctions, treesize of input 59 treesize of output 41 [2021-08-25 19:23:00,393 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 14 treesize of output 12 [2021-08-25 19:23:00,754 INFO L354 Elim1Store]: treesize reduction 812, result has 20.7 percent of original size [2021-08-25 19:23:00,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 22 case distinctions, treesize of input 201 treesize of output 374 [2021-08-25 19:23:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:00,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:00,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:00,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,027 INFO L354 Elim1Store]: treesize reduction 41, result has 32.8 percent of original size [2021-08-25 19:23:01,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 127 treesize of output 99 [2021-08-25 19:23:01,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,111 INFO L354 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2021-08-25 19:23:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 91 [2021-08-25 19:23:01,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,169 INFO L354 Elim1Store]: treesize reduction 41, result has 32.8 percent of original size [2021-08-25 19:23:01,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 86 [2021-08-25 19:23:01,480 INFO L354 Elim1Store]: treesize reduction 106, result has 24.3 percent of original size [2021-08-25 19:23:01,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 84 [2021-08-25 19:23:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:01,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:02,734 INFO L354 Elim1Store]: treesize reduction 1191, result has 28.6 percent of original size [2021-08-25 19:23:02,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 9 select indices, 9 select index equivalence classes, 8 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 302 treesize of output 792 [2021-08-25 19:23:02,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:04,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:04,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:04,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:05,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:05,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:06,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:06,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:10,536 INFO L354 Elim1Store]: treesize reduction 193, result has 31.1 percent of original size [2021-08-25 19:23:10,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 1767 treesize of output 1728 [2021-08-25 19:23:11,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:11,389 INFO L354 Elim1Store]: treesize reduction 206, result has 31.3 percent of original size [2021-08-25 19:23:11,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 1714 treesize of output 1501 [2021-08-25 19:23:12,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:12,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:12,956 INFO L354 Elim1Store]: treesize reduction 275, result has 33.7 percent of original size [2021-08-25 19:23:12,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 1254 treesize of output 787 [2021-08-25 19:23:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:16,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:16,275 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-08-25 19:23:16,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 244 treesize of output 188 [2021-08-25 19:23:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:22,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:22,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:22,891 INFO L354 Elim1Store]: treesize reduction 902, result has 10.1 percent of original size [2021-08-25 19:23:22,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 11 select indices, 11 select index equivalence classes, 13 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 39 case distinctions, treesize of input 507 treesize of output 671 [2021-08-25 19:23:29,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:29,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:29,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:29,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 252 [2021-08-25 19:23:30,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 252 [2021-08-25 19:23:30,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:23:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 252 [2021-08-25 19:23:30,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:30,686 INFO L354 Elim1Store]: treesize reduction 223, result has 0.4 percent of original size [2021-08-25 19:23:30,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 410 treesize of output 270 [2021-08-25 19:23:31,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:31,702 INFO L354 Elim1Store]: treesize reduction 175, result has 21.9 percent of original size [2021-08-25 19:23:31,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 1038 treesize of output 829 [2021-08-25 19:23:32,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:32,395 INFO L354 Elim1Store]: treesize reduction 207, result has 19.1 percent of original size [2021-08-25 19:23:32,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 11 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 741 treesize of output 548 [2021-08-25 19:23:37,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:23:37,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446584692] [2021-08-25 19:23:37,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:23:37,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171477742] [2021-08-25 19:23:37,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-25 19:23:37,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:23:37,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:23:37,277 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-08-25 19:23:37,277 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:23:37,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:23:37,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 19:23:37,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-25 19:23:37,497 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:23:37,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:23:37 BoogieIcfgContainer [2021-08-25 19:23:37,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:23:37,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:23:37,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:23:37,507 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:23:37,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:22:36" (3/4) ... [2021-08-25 19:23:37,510 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:23:37,510 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:23:37,511 INFO L168 Benchmark]: Toolchain (without parser) took 61554.74 ms. Allocated memory was 60.8 MB in the beginning and 111.1 MB in the end (delta: 50.3 MB). Free memory was 41.5 MB in the beginning and 65.7 MB in the end (delta: -24.2 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2021-08-25 19:23:37,512 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 60.8 MB. Free memory is still 42.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:23:37,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.10 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 43.3 MB in the end (delta: -2.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:23:37,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.20 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 41.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:23:37,515 INFO L168 Benchmark]: Boogie Preprocessor took 31.81 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 40.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:23:37,515 INFO L168 Benchmark]: RCFGBuilder took 369.20 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 42.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2021-08-25 19:23:37,516 INFO L168 Benchmark]: TraceAbstraction took 60886.89 ms. Allocated memory was 60.8 MB in the beginning and 111.1 MB in the end (delta: 50.3 MB). Free memory was 42.3 MB in the beginning and 66.5 MB in the end (delta: -24.2 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. [2021-08-25 19:23:37,516 INFO L168 Benchmark]: Witness Printer took 3.63 ms. Allocated memory is still 111.1 MB. Free memory was 66.5 MB in the beginning and 65.7 MB in the end (delta: 771.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:23:37,517 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 60.8 MB. Free memory is still 42.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 226.10 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 43.3 MB in the end (delta: -2.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.20 ms. Allocated memory is still 60.8 MB. Free memory was 43.1 MB in the beginning and 41.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.81 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 40.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 369.20 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 42.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 60886.89 ms. Allocated memory was 60.8 MB in the beginning and 111.1 MB in the end (delta: 50.3 MB). Free memory was 42.3 MB in the beginning and 66.5 MB in the end (delta: -24.2 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. * Witness Printer took 3.63 ms. Allocated memory is still 111.1 MB. Free memory was 66.5 MB in the beginning and 65.7 MB in the end (delta: 771.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = N [L35] i=1 [L35] COND TRUE i 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 -> 121ef5d6893dcc51dc4e8996443da3489b936a9e [2021-08-25 19:23:39,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:23:39,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:23:39,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:23:39,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:23:39,487 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:23:39,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ncomp.c [2021-08-25 19:23:39,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4996ca4de/8bcc9173f9594d9c89768d340fa89c80/FLAG07ad1c4b7 [2021-08-25 19:23:39,923 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:23:39,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c [2021-08-25 19:23:39,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4996ca4de/8bcc9173f9594d9c89768d340fa89c80/FLAG07ad1c4b7 [2021-08-25 19:23:39,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4996ca4de/8bcc9173f9594d9c89768d340fa89c80 [2021-08-25 19:23:39,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:23:39,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:23:39,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:23:39,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:23:39,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:23:39,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:23:39" (1/1) ... [2021-08-25 19:23:39,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74ebddf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:39, skipping insertion in model container [2021-08-25 19:23:39,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:23:39" (1/1) ... [2021-08-25 19:23:39,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:23:39,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:23:40,110 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c[588,601] [2021-08-25 19:23:40,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:23:40,175 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:23:40,197 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c[588,601] [2021-08-25 19:23:40,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:23:40,235 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:23:40,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40 WrapperNode [2021-08-25 19:23:40,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:23:40,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:23:40,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:23:40,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:23:40,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:23:40,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:23:40,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:23:40,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:23:40,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:23:40,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:23:40,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:23:40,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:23:40,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (1/1) ... [2021-08-25 19:23:40,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:23:40,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:23:40,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 19:23:40,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 19:23:40,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-25 19:23:40,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:23:40,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-08-25 19:23:40,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:23:40,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:23:40,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:23:40,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-08-25 19:23:40,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:23:40,837 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-08-25 19:23:40,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:23:40 BoogieIcfgContainer [2021-08-25 19:23:40,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:23:40,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:23:40,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:23:40,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:23:40,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:23:39" (1/3) ... [2021-08-25 19:23:40,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f6d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:23:40, skipping insertion in model container [2021-08-25 19:23:40,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:23:40" (2/3) ... [2021-08-25 19:23:40,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f6d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:23:40, skipping insertion in model container [2021-08-25 19:23:40,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:23:40" (3/3) ... [2021-08-25 19:23:40,857 INFO L111 eAbstractionObserver]: Analyzing ICFG ncomp.c [2021-08-25 19:23:40,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:23:40,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:23:40,933 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:23:40,938 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 19:23:40,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:23:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:23:40,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:23:40,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:23:40,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:23:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:23:40,955 INFO L82 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2021-08-25 19:23:40,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:23:40,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874036823] [2021-08-25 19:23:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:23:40,964 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:23:40,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:23:40,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:23:40,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-25 19:23:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:23:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-25 19:23:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:23:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:23:41,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:23:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:23:41,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:23:41,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874036823] [2021-08-25 19:23:41,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874036823] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:23:41,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:23:41,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-25 19:23:41,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75676295] [2021-08-25 19:23:41,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:23:41,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:23:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:23:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:23:41,238 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:23:41,246 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-08-25 19:23:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:23:41,247 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-08-25 19:23:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:23:41,252 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:23:41,252 INFO L226 Difference]: Without dead ends: 20 [2021-08-25 19:23:41,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:23:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-25 19:23:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-25 19:23:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-08-25 19:23:41,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-08-25 19:23:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:23:41,273 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-08-25 19:23:41,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-08-25 19:23:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:23:41,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:23:41,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:23:41,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:23:41,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:23:41,483 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:23:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:23:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2021-08-25 19:23:41,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:23:41,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018104955] [2021-08-25 19:23:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:23:41,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:23:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:23:41,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:23:41,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-25 19:23:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:23:41,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-25 19:23:41,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:23:42,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:42,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:42,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:42,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:42,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:42,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:42,284 INFO L354 Elim1Store]: treesize reduction 375, result has 19.9 percent of original size [2021-08-25 19:23:42,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 113 [2021-08-25 19:23:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:42,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:42,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:42,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:23:42,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 65 [2021-08-25 19:23:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:23:42,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:23:45,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:45,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:45,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:45,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:45,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:46,002 INFO L354 Elim1Store]: treesize reduction 220, result has 0.5 percent of original size [2021-08-25 19:23:46,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 150 treesize of output 1 [2021-08-25 19:23:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:23:46,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:23:46,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018104955] [2021-08-25 19:23:46,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018104955] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:23:46,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:23:46,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-08-25 19:23:46,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597296456] [2021-08-25 19:23:46,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:23:46,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:23:46,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:23:46,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:23:46,015 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:23:49,920 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-08-25 19:23:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:23:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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 14 [2021-08-25 19:23:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:23:49,944 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:23:49,944 INFO L226 Difference]: Without dead ends: 22 [2021-08-25 19:23:49,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4494.6ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-08-25 19:23:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-25 19:23:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-08-25 19:23:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-08-25 19:23:49,949 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2021-08-25 19:23:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:23:49,949 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-08-25 19:23:49,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-08-25 19:23:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:23:49,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:23:49,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:23:49,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:23:50,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:23:50,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:23:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:23:50,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1060218526, now seen corresponding path program 1 times [2021-08-25 19:23:50,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:23:50,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120485155] [2021-08-25 19:23:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:23:50,156 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:23:50,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:23:50,157 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:23:50,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-25 19:23:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:23:50,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 19:23:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:23:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:23:50,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:23:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:23:51,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:23:51,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120485155] [2021-08-25 19:23:51,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120485155] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:23:51,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:23:51,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-25 19:23:51,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210955592] [2021-08-25 19:23:51,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 19:23:51,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:23:51,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 19:23:51,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:23:51,060 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:52,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:23:52,399 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-08-25 19:23:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-25 19:23:52,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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 16 [2021-08-25 19:23:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:23:52,414 INFO L225 Difference]: With dead ends: 61 [2021-08-25 19:23:52,414 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 19:23:52,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-08-25 19:23:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 19:23:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-08-25 19:23:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-08-25 19:23:52,420 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2021-08-25 19:23:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:23:52,420 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-08-25 19:23:52,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:23:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-08-25 19:23:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:23:52,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:23:52,421 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:23:52,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:23:52,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:23:52,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:23:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:23:52,622 INFO L82 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2021-08-25 19:23:52,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:23:52,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341399943] [2021-08-25 19:23:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:23:52,623 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:23:52,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:23:52,624 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:23:52,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-25 19:23:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:23:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-25 19:23:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:23:53,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:53,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:53,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:53,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:53,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:53,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:53,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:53,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:53,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:53,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:53,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:53,667 INFO L354 Elim1Store]: treesize reduction 389, result has 20.0 percent of original size [2021-08-25 19:23:53,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 122 treesize of output 117 [2021-08-25 19:23:53,817 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:23:53,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 26 [2021-08-25 19:23:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:54,168 INFO L354 Elim1Store]: treesize reduction 621, result has 7.5 percent of original size [2021-08-25 19:23:54,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 152 treesize of output 131 [2021-08-25 19:23:56,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:56,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:57,286 INFO L354 Elim1Store]: treesize reduction 1735, result has 3.2 percent of original size [2021-08-25 19:23:57,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 6 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 60 case distinctions, treesize of input 315 treesize of output 221 [2021-08-25 19:23:58,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:58,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:58,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:23:58,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:58,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:58,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:23:58,759 INFO L354 Elim1Store]: treesize reduction 1768, result has 4.2 percent of original size [2021-08-25 19:23:58,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 97 case distinctions, treesize of input 421 treesize of output 300 [2021-08-25 19:24:01,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:01,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:01,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:01,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:01,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:01,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:01,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:01,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:01,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:01,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:01,538 INFO L354 Elim1Store]: treesize reduction 1523, result has 1.5 percent of original size [2021-08-25 19:24:01,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 6 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 497 treesize of output 178 [2021-08-25 19:24:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:24:01,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:24:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:10,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:10,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:10,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:24:10,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:10,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:24:14,481 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-25 19:24:14,492 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 14711205816 treesize of output 1 [2021-08-25 19:24:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:24:14,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:24:14,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341399943] [2021-08-25 19:24:14,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341399943] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:24:14,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:24:14,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-08-25 19:24:14,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281645990] [2021-08-25 19:24:14,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-25 19:24:14,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:24:14,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-25 19:24:14,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-25 19:24:14,508 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:24:53,555 WARN L207 SmtUtils]: Spent 26.24 s on a formula simplification. DAG size of input: 148 DAG size of output: 139 [2021-08-25 19:26:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:26:20,931 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-08-25 19:26:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-25 19:26:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:26:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:26:20,952 INFO L225 Difference]: With dead ends: 82 [2021-08-25 19:26:20,952 INFO L226 Difference]: Without dead ends: 58 [2021-08-25 19:26:20,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 107912.9ms TimeCoverageRelationStatistics Valid=730, Invalid=2348, Unknown=2, NotChecked=0, Total=3080 [2021-08-25 19:26:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-25 19:26:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-08-25 19:26:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:26:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-08-25 19:26:20,958 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 20 [2021-08-25 19:26:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:26:20,959 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-08-25 19:26:20,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:26:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-08-25 19:26:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:26:20,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:26:20,959 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:26:20,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:26:21,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:26:21,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:26:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:26:21,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1049923930, now seen corresponding path program 2 times [2021-08-25 19:26:21,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:26:21,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977380514] [2021-08-25 19:26:21,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:26:21,161 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:26:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:26:21,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:26:21,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-25 19:26:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:26:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:26:21,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 19:26:21,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:26:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 19:26:22,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:26:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 19:26:22,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:26:22,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977380514] [2021-08-25 19:26:22,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977380514] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:26:22,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:26:22,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-25 19:26:22,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693593835] [2021-08-25 19:26:22,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-25 19:26:22,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:26:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-25 19:26:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-25 19:26:22,770 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:26:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:26:25,658 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-08-25 19:26:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-25 19:26:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 19:26:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:26:25,672 INFO L225 Difference]: With dead ends: 94 [2021-08-25 19:26:25,672 INFO L226 Difference]: Without dead ends: 70 [2021-08-25 19:26:25,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2187.4ms TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2021-08-25 19:26:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-25 19:26:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-08-25 19:26:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:26:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-08-25 19:26:25,679 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2021-08-25 19:26:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:26:25,679 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-08-25 19:26:25,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:26:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-08-25 19:26:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 19:26:25,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:26:25,680 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:26:25,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:26:25,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:26:25,890 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:26:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:26:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 3 times [2021-08-25 19:26:25,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:26:25,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736937203] [2021-08-25 19:26:25,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:26:25,891 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:26:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:26:25,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:26:25,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-25 19:26:26,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:26:26,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:26:26,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-25 19:26:26,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:26:26,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:26,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:26,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:26,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:26,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:26,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:26,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:26,983 INFO L354 Elim1Store]: treesize reduction 389, result has 20.0 percent of original size [2021-08-25 19:26:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 122 treesize of output 117 [2021-08-25 19:26:27,145 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 16 treesize of output 14 [2021-08-25 19:26:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:27,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:27,834 INFO L354 Elim1Store]: treesize reduction 914, result has 11.7 percent of original size [2021-08-25 19:26:27,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 179 treesize of output 213 [2021-08-25 19:26:30,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:30,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:30,935 INFO L354 Elim1Store]: treesize reduction 1961, result has 7.3 percent of original size [2021-08-25 19:26:30,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 4 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 335 treesize of output 311 [2021-08-25 19:26:36,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:36,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:36,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:26:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:36,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:36,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:37,474 INFO L354 Elim1Store]: treesize reduction 2225, result has 10.1 percent of original size [2021-08-25 19:26:37,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 9 disjoint index pairs (out of 91 index pairs), introduced 12 new quantified variables, introduced 68 case distinctions, treesize of input 521 treesize of output 516 [2021-08-25 19:26:44,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:44,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:26:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:31:00,543 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-25 19:31:00,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:31:00,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736937203] [2021-08-25 19:31:00,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-08-25 19:31:00,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1296519664] [2021-08-25 19:31:00,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:31:00,545 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-25 19:31:00,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-25 19:31:00,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-25 19:31:00,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-08-25 19:31:00,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-08-25 19:31:01,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:31:01,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588651814] [2021-08-25 19:31:01,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:31:01,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:31:01,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:31:01,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:31:01,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 19:31:01,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 1 [2021-08-25 19:31:02,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:31:02,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:31:02,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-25 19:31:02,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:31:02,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-08-25 19:31:02,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:31:02,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:31:02,185 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-25 19:31:02,185 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:31:02,188 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:31:02,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 19:31:02,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-08-25 19:31:02,590 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,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:31:02,594 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:31:02,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:31:02 BoogieIcfgContainer [2021-08-25 19:31:02,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:31:02,603 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:31:02,603 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:31:02,603 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:31:02,604 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:23:40" (3/4) ... [2021-08-25 19:31:02,607 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:31:02,607 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:31:02,608 INFO L168 Benchmark]: Toolchain (without parser) took 442659.46 ms. Allocated memory was 71.3 MB in the beginning and 650.1 MB in the end (delta: 578.8 MB). Free memory was 53.6 MB in the beginning and 254.4 MB in the end (delta: -200.8 MB). Peak memory consumption was 377.7 MB. Max. memory is 16.1 GB. [2021-08-25 19:31:02,608 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 52.1 MB in the end (delta: 40.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:31:02,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.46 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 53.0 MB in the end (delta: 511.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:31:02,609 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.59 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 51.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:31:02,609 INFO L168 Benchmark]: Boogie Preprocessor took 42.79 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 49.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:31:02,609 INFO L168 Benchmark]: RCFGBuilder took 517.81 ms. Allocated memory is still 71.3 MB. Free memory was 49.6 MB in the beginning and 31.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-08-25 19:31:02,610 INFO L168 Benchmark]: TraceAbstraction took 441763.21 ms. Allocated memory was 71.3 MB in the beginning and 650.1 MB in the end (delta: 578.8 MB). Free memory was 30.8 MB in the beginning and 255.5 MB in the end (delta: -224.7 MB). Peak memory consumption was 356.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:31:02,610 INFO L168 Benchmark]: Witness Printer took 4.16 ms. Allocated memory is still 650.1 MB. Free memory is still 254.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:31:02,612 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 52.1 MB in the end (delta: 40.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.46 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 53.0 MB in the end (delta: 511.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.59 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 51.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.79 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 49.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 517.81 ms. Allocated memory is still 71.3 MB. Free memory was 49.6 MB in the beginning and 31.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 441763.21 ms. Allocated memory was 71.3 MB in the beginning and 650.1 MB in the end (delta: 578.8 MB). Free memory was 30.8 MB in the beginning and 255.5 MB in the end (delta: -224.7 MB). Peak memory consumption was 356.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.16 ms. Allocated memory is still 650.1 MB. Free memory is still 254.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = N [L35] i=1 [L35] COND TRUE i