./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/sqm.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/sqm.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 c1ee476d531435be9ea28c03d577dfaac3e84626 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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/sqm.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 c1ee476d531435be9ea28c03d577dfaac3e84626 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:46:35,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:46:35,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:46:35,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:46:35,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:46:35,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:46:35,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:46:35,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:46:35,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:46:35,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:46:35,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:46:35,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:46:35,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:46:35,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:46:35,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:46:35,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:46:35,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:46:35,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:46:35,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:46:35,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:46:35,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:46:35,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:46:35,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:46:35,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:46:35,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:46:35,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:46:35,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:46:35,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:46:35,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:46:35,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:46:35,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:46:35,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:46:35,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:46:35,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:46:35,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:46:35,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:46:35,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:46:35,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:46:35,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:46:35,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:46:35,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:46:35,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:46:35,253 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:46:35,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:46:35,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:46:35,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:46:35,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:46:35,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:46:35,256 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:46:35,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:46:35,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:46:35,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:46:35,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:46:35,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:46:35,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:46:35,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:46:35,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:46:35,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:46:35,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:46:35,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:46:35,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:46:35,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:46:35,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:46:35,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:46:35,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:46:35,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:46:35,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:46:35,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:46:35,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:46:35,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:46:35,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:46:35,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:46:35,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1ee476d531435be9ea28c03d577dfaac3e84626 [2021-08-25 19:46:35,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:46:35,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:46:35,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:46:35,606 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:46:35,607 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:46:35,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sqm.c [2021-08-25 19:46:35,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a452ddec/03db7adaaf1b4e12959762df2f684732/FLAGe4ad03ad8 [2021-08-25 19:46:36,137 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:46:36,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm.c [2021-08-25 19:46:36,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a452ddec/03db7adaaf1b4e12959762df2f684732/FLAGe4ad03ad8 [2021-08-25 19:46:36,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a452ddec/03db7adaaf1b4e12959762df2f684732 [2021-08-25 19:46:36,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:46:36,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:46:36,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:46:36,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:46:36,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:46:36,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d151174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36, skipping insertion in model container [2021-08-25 19:46:36,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:46:36,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:46:36,331 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/sqm.c[586,599] [2021-08-25 19:46:36,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:46:36,352 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:46:36,363 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/sqm.c[586,599] [2021-08-25 19:46:36,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:46:36,400 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:46:36,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36 WrapperNode [2021-08-25 19:46:36,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:46:36,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:46:36,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:46:36,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:46:36,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:46:36,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:46:36,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:46:36,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:46:36,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:46:36,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:46:36,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:46:36,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:46:36,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (1/1) ... [2021-08-25 19:46:36,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:46:36,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:36,554 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 19:46:36,584 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 19:46:36,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:46:36,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:46:36,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:46:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:46:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:46:36,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:46:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:46:36,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:46:36,969 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:46:36,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:46:36 BoogieIcfgContainer [2021-08-25 19:46:36,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:46:36,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:46:36,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:46:36,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:46:36,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:46:36" (1/3) ... [2021-08-25 19:46:36,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769091f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:46:36, skipping insertion in model container [2021-08-25 19:46:36,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:36" (2/3) ... [2021-08-25 19:46:36,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769091f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:46:36, skipping insertion in model container [2021-08-25 19:46:36,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:46:36" (3/3) ... [2021-08-25 19:46:36,978 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm.c [2021-08-25 19:46:36,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:46:36,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:46:37,022 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:46:37,028 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 19:46:37,028 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:46:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 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 19:46:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:46:37,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:37,046 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:37,046 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:37,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:46:37,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:37,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197992548] [2021-08-25 19:46:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:37,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:37,235 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 19:46:37,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:37,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197992548] [2021-08-25 19:46:37,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197992548] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:46:37,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:46:37,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:46:37,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902585333] [2021-08-25 19:46:37,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:46:37,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:37,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:46:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:46:37,267 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 19:46:37,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:37,282 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:46:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:46:37,283 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-08-25 19:46:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:37,289 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:46:37,290 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:46:37,292 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 19:46:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:46:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:46:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:46:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:46:37,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:46:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:37,321 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:46:37,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 19:46:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:46:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:46:37,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:37,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:37,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:46:37,327 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:37,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:46:37,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:37,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732257284] [2021-08-25 19:46:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:37,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:37,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:37,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692670907] [2021-08-25 19:46:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:37,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:37,377 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 19:46:37,427 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 19:46:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:46:37,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:37,604 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-25 19:46:37,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:46:37,847 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 19:46:37,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:37,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732257284] [2021-08-25 19:46:37,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:37,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692670907] [2021-08-25 19:46:37,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692670907] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:46:37,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:46:37,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:46:37,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861840697] [2021-08-25 19:46:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:46:37,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:46:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:46:37,855 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 19:46:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:37,989 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-25 19:46:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:46:37,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-08-25 19:46:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:37,992 INFO L225 Difference]: With dead ends: 34 [2021-08-25 19:46:37,993 INFO L226 Difference]: Without dead ends: 32 [2021-08-25 19:46:37,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:46:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-25 19:46:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-25 19:46:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 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 19:46:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:46:38,003 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:46:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:38,003 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:46:38,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 19:46:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:46:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:46:38,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:38,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:38,032 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 19:46:38,221 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 19:46:38,222 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:46:38,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:38,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545419108] [2021-08-25 19:46:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:38,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:38,241 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:38,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171388188] [2021-08-25 19:46:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:38,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:38,246 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 19:46:38,283 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 19:46:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:38,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:46:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:38,501 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 19:46:38,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:38,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545419108] [2021-08-25 19:46:38,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:38,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171388188] [2021-08-25 19:46:38,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171388188] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:46:38,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:46:38,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:46:38,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333330888] [2021-08-25 19:46:38,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:46:38,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:46:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:46:38,504 INFO L87 Difference]: Start difference. First operand 23 states and 27 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 19:46:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:38,695 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-08-25 19:46:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:46:38,696 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 19:46:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:38,697 INFO L225 Difference]: With dead ends: 49 [2021-08-25 19:46:38,697 INFO L226 Difference]: Without dead ends: 40 [2021-08-25 19:46:38,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:46:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-25 19:46:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-08-25 19:46:38,700 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 19:46:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:46:38,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:46:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:38,701 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:46:38,701 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 19:46:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:46:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:46:38,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:38,702 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:38,725 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 19:46:38,902 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 19:46:38,903 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:46:38,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:38,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288065099] [2021-08-25 19:46:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:38,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:38,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:38,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200606940] [2021-08-25 19:46:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:38,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:38,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:38,931 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 19:46:38,966 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 19:46:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:39,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:46:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:39,146 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 19:46:39,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:39,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288065099] [2021-08-25 19:46:39,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:39,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200606940] [2021-08-25 19:46:39,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200606940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:46:39,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:46:39,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 19:46:39,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013699195] [2021-08-25 19:46:39,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:46:39,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:46:39,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:46:39,148 INFO L87 Difference]: Start difference. First operand 23 states and 26 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 19:46:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:39,270 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-25 19:46:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:46:39,271 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 19:46:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:39,272 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:46:39,272 INFO L226 Difference]: Without dead ends: 37 [2021-08-25 19:46:39,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:46:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-25 19:46:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-08-25 19:46:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 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 19:46:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-25 19:46:39,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-08-25 19:46:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:39,277 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-25 19:46:39,277 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 19:46:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-25 19:46:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:46:39,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:39,278 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:39,300 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 19:46:39,491 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 19:46:39,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:46:39,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:39,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281246983] [2021-08-25 19:46:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:39,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:39,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:39,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563797660] [2021-08-25 19:46:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:39,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:39,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:39,506 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 19:46:39,509 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 19:46:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:39,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 19:46:39,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:39,682 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 19:46:39,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:39,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281246983] [2021-08-25 19:46:39,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:39,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563797660] [2021-08-25 19:46:39,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563797660] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:46:39,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:46:39,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-25 19:46:39,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937159297] [2021-08-25 19:46:39,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 19:46:39,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 19:46:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:46:39,686 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 19:46:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:39,755 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-08-25 19:46:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:46:39,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 19:46:39,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:39,756 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:46:39,757 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:46:39,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:46:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:46:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-25 19:46:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 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 19:46:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-25 19:46:39,761 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-08-25 19:46:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:39,762 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-25 19:46:39,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 19:46:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-25 19:46:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:46:39,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:39,763 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:39,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:46:39,976 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 19:46:39,977 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:46:39,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:39,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709904748] [2021-08-25 19:46:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:39,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:39,995 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:39,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101251715] [2021-08-25 19:46:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:39,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:39,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:39,996 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 19:46:40,015 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 19:46:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 19:46:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:40,152 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 10 treesize of output 8 [2021-08-25 19:46:40,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:46:40,223 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-25 19:46:40,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-08-25 19:46:40,385 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-08-25 19:46:40,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 49 [2021-08-25 19:46:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:46:40,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:40,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709904748] [2021-08-25 19:46:40,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:40,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101251715] [2021-08-25 19:46:40,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101251715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:46:40,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:46:40,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:46:40,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192742768] [2021-08-25 19:46:40,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:46:40,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:46:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:46:40,633 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 19:46:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:40,964 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-08-25 19:46:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 19:46:40,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 19:46:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:40,967 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:46:40,967 INFO L226 Difference]: Without dead ends: 41 [2021-08-25 19:46:40,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:46:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-25 19:46:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-08-25 19:46:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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 19:46:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-25 19:46:40,971 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-08-25 19:46:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:40,972 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-25 19:46:40,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 19:46:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-25 19:46:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:46:40,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:40,973 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:41,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:46:41,184 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 19:46:41,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-08-25 19:46:41,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:41,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431055148] [2021-08-25 19:46:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:41,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:41,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:41,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845649045] [2021-08-25 19:46:41,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:46:41,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:41,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:41,227 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 19:46:41,228 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 19:46:41,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:46:41,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:46:41,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:46:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:46:41,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:41,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431055148] [2021-08-25 19:46:41,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:41,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845649045] [2021-08-25 19:46:41,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845649045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:46:41,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:46:41,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:46:41,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402173163] [2021-08-25 19:46:41,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:46:41,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:46:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:46:41,426 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19:46:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:41,544 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-08-25 19:46:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:46:41,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19:46:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:41,548 INFO L225 Difference]: With dead ends: 65 [2021-08-25 19:46:41,548 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:46:41,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:46:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:46:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-08-25 19:46:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:46:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-08-25 19:46:41,561 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-08-25 19:46:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:41,562 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-08-25 19:46:41,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19:46:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-08-25 19:46:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:46:41,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:41,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:41,594 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 19:46:41,782 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 19:46:41,782 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:41,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2021-08-25 19:46:41,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:41,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048620217] [2021-08-25 19:46:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:41,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:41,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:41,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595577117] [2021-08-25 19:46:41,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:46:41,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:41,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:41,811 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 19:46:41,813 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 19:46:41,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:46:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:46:41,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:46:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:46:42,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:42,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048620217] [2021-08-25 19:46:42,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:42,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595577117] [2021-08-25 19:46:42,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595577117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:46:42,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:46:42,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:46:42,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155722541] [2021-08-25 19:46:42,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:46:42,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:42,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:46:42,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:46:42,039 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19:46:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:42,141 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-25 19:46:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:46:42,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19:46:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:42,142 INFO L225 Difference]: With dead ends: 60 [2021-08-25 19:46:42,142 INFO L226 Difference]: Without dead ends: 53 [2021-08-25 19:46:42,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:46:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-25 19:46:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-08-25 19:46:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 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 19:46:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-08-25 19:46:42,151 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2021-08-25 19:46:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:42,151 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-08-25 19:46:42,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19:46:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-08-25 19:46:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:46:42,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:42,152 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:42,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-25 19:46:42,368 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 19:46:42,369 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2021-08-25 19:46:42,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:42,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756006490] [2021-08-25 19:46:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:42,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:42,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:42,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20129089] [2021-08-25 19:46:42,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:46:42,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:42,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:42,389 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 19:46:42,414 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 19:46:42,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:46:42,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:46:42,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-25 19:46:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:42,682 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 10 treesize of output 8 [2021-08-25 19:46:42,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:46:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:42,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 276 [2021-08-25 19:46:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 57 [2021-08-25 19:46:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 57 [2021-08-25 19:46:42,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:42,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 65 [2021-08-25 19:46:43,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2021-08-25 19:46:43,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:43,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 456 [2021-08-25 19:46:43,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 111 [2021-08-25 19:46:43,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 133 [2021-08-25 19:46:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 132 [2021-08-25 19:46:43,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:43,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:43,542 INFO L354 Elim1Store]: treesize reduction 36, result has 16.3 percent of original size [2021-08-25 19:46:43,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 89 treesize of output 72 [2021-08-25 19:46:43,770 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-25 19:46:43,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 54 [2021-08-25 19:46:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:46:43,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:43,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756006490] [2021-08-25 19:46:43,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:43,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20129089] [2021-08-25 19:46:43,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20129089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:46:43,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:46:43,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 19:46:43,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874067832] [2021-08-25 19:46:43,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:46:43,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:43,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:46:43,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:46:43,792 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 19:46:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:44,486 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-08-25 19:46:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-25 19:46:44,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 19:46:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:44,488 INFO L225 Difference]: With dead ends: 64 [2021-08-25 19:46:44,488 INFO L226 Difference]: Without dead ends: 62 [2021-08-25 19:46:44,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-25 19:46:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-25 19:46:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2021-08-25 19:46:44,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:46:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-08-25 19:46:44,493 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 20 [2021-08-25 19:46:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:44,493 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-08-25 19:46:44,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 19:46:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-08-25 19:46:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:46:44,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:44,494 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:44,514 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 19:46:44,697 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 19:46:44,697 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:44,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 5 times [2021-08-25 19:46:44,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:44,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816538167] [2021-08-25 19:46:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:44,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:44,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:44,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597244699] [2021-08-25 19:46:44,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 19:46:44,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:44,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:44,736 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 19:46:44,737 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 19:46:48,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-25 19:46:48,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:46:48,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:46:48,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:46:48,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:48,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816538167] [2021-08-25 19:46:48,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:48,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597244699] [2021-08-25 19:46:48,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597244699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:46:48,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:46:48,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:46:48,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494876728] [2021-08-25 19:46:48,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:46:48,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:46:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:46:48,937 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 19:46:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:49,097 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-08-25 19:46:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:46:49,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 19:46:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:49,098 INFO L225 Difference]: With dead ends: 97 [2021-08-25 19:46:49,098 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 19:46:49,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-25 19:46:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 19:46:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-08-25 19:46:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:46:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-08-25 19:46:49,104 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 22 [2021-08-25 19:46:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:49,104 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-08-25 19:46:49,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 19:46:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-08-25 19:46:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:46:49,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:49,105 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:49,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-25 19:46:49,312 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 19:46:49,312 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 6 times [2021-08-25 19:46:49,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:49,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817571425] [2021-08-25 19:46:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:49,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:49,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:49,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436455230] [2021-08-25 19:46:49,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 19:46:49,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:49,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:49,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:46:49,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 19:46:49,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-25 19:46:49,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:46:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:46:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:46:49,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:49,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817571425] [2021-08-25 19:46:49,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:49,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436455230] [2021-08-25 19:46:49,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436455230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:46:49,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:46:49,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:46:49,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406133456] [2021-08-25 19:46:49,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:46:49,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:46:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:46:49,735 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 19:46:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:49,929 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-08-25 19:46:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 19:46:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 19:46:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:49,930 INFO L225 Difference]: With dead ends: 81 [2021-08-25 19:46:49,930 INFO L226 Difference]: Without dead ends: 74 [2021-08-25 19:46:49,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:46:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-25 19:46:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-08-25 19:46:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 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 19:46:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-08-25 19:46:49,934 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 22 [2021-08-25 19:46:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:49,934 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-08-25 19:46:49,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 19:46:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-08-25 19:46:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:46:49,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:49,935 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:49,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 19:46:50,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-25 19:46:50,140 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 1 times [2021-08-25 19:46:50,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:50,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439184273] [2021-08-25 19:46:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:50,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:50,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:50,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132326467] [2021-08-25 19:46:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:50,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:50,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:50,152 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:46:50,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-25 19:46:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:50,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 19:46:50,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:46:50,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439184273] [2021-08-25 19:46:50,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132326467] [2021-08-25 19:46:50,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132326467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:46:50,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:46:50,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:46:50,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125351388] [2021-08-25 19:46:50,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:46:50,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:46:50,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:46:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:46:50,485 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 19:46:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:50,591 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-08-25 19:46:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:46:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 19:46:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:50,593 INFO L225 Difference]: With dead ends: 76 [2021-08-25 19:46:50,593 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:46:50,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:46:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:46:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2021-08-25 19:46:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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 19:46:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-25 19:46:50,598 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 24 [2021-08-25 19:46:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:50,599 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-25 19:46:50,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 19:46:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-25 19:46:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:46:50,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:50,599 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:50,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-25 19:46:50,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-25 19:46:50,812 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 7 times [2021-08-25 19:46:50,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:46:50,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029642030] [2021-08-25 19:46:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:50,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:46:50,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:46:50,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378135706] [2021-08-25 19:46:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 19:46:50,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:46:50,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:50,828 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:46:50,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-25 19:46:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-25 19:46:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:51,425 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 10 treesize of output 8 [2021-08-25 19:46:51,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:46:51,591 INFO L354 Elim1Store]: treesize reduction 671, result has 14.7 percent of original size [2021-08-25 19:46:51,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 186 treesize of output 267 [2021-08-25 19:46:51,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:51,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 62 [2021-08-25 19:46:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 63 [2021-08-25 19:46:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:51,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 63 [2021-08-25 19:46:51,846 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-08-25 19:46:51,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 44 [2021-08-25 19:46:52,264 INFO L354 Elim1Store]: treesize reduction 1004, result has 20.4 percent of original size [2021-08-25 19:46:52,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 212 treesize of output 416 [2021-08-25 19:46:52,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,380 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-25 19:46:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 137 treesize of output 106 [2021-08-25 19:46:52,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 66 [2021-08-25 19:46:52,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:46:52,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:46:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:52,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:52,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 63 [2021-08-25 19:46:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:46:53,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 87 [2021-08-25 19:46:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:53,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 73 [2021-08-25 19:46:54,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:46:54,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029642030] [2021-08-25 19:46:54,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:46:54,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378135706] [2021-08-25 19:46:54,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-25 19:46:54,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:46:54,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:46:54,377 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-08-25 19:46:54,377 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:46:54,381 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:46:54,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-25 19:46:54,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-25 19:46:54,593 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:46:54,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:46:54 BoogieIcfgContainer [2021-08-25 19:46:54,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:46:54,607 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:46:54,607 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:46:54,608 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:46:54,608 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:46:36" (3/4) ... [2021-08-25 19:46:54,610 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:46:54,610 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:46:54,611 INFO L168 Benchmark]: Toolchain (without parser) took 18443.74 ms. Allocated memory was 52.4 MB in the beginning and 134.2 MB in the end (delta: 81.8 MB). Free memory was 29.3 MB in the beginning and 71.8 MB in the end (delta: -42.5 MB). Peak memory consumption was 39.2 MB. Max. memory is 16.1 GB. [2021-08-25 19:46:54,612 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory was 34.2 MB in the beginning and 34.1 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:46:54,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.81 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.1 MB in the beginning and 46.7 MB in the end (delta: -17.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-08-25 19:46:54,612 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.90 ms. Allocated memory is still 62.9 MB. Free memory was 46.6 MB in the beginning and 44.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:46:54,612 INFO L168 Benchmark]: Boogie Preprocessor took 47.95 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 43.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:46:54,613 INFO L168 Benchmark]: RCFGBuilder took 447.50 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 45.7 MB in the end (delta: -2.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2021-08-25 19:46:54,613 INFO L168 Benchmark]: TraceAbstraction took 17634.58 ms. Allocated memory was 62.9 MB in the beginning and 134.2 MB in the end (delta: 71.3 MB). Free memory was 45.1 MB in the beginning and 71.8 MB in the end (delta: -26.7 MB). Peak memory consumption was 80.0 MB. Max. memory is 16.1 GB. [2021-08-25 19:46:54,613 INFO L168 Benchmark]: Witness Printer took 3.34 ms. Allocated memory is still 134.2 MB. Free memory is still 71.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:46:54,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory was 34.2 MB in the beginning and 34.1 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.81 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.1 MB in the beginning and 46.7 MB in the end (delta: -17.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.90 ms. Allocated memory is still 62.9 MB. Free memory was 46.6 MB in the beginning and 44.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.95 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 43.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 447.50 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 45.7 MB in the end (delta: -2.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17634.58 ms. Allocated memory was 62.9 MB in the beginning and 134.2 MB in the end (delta: 71.3 MB). Free memory was 45.1 MB in the beginning and 71.8 MB in the end (delta: -26.7 MB). Peak memory consumption was 80.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.34 ms. Allocated memory is still 134.2 MB. Free memory is still 71.8 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); [L31] b[0] = 1 [L32] a[0] = 1 [L34] i=1 [L34] 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 -> c1ee476d531435be9ea28c03d577dfaac3e84626 [2021-08-25 19:46:56,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:46:56,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:46:56,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:46:56,900 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:46:56,901 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:46:56,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sqm.c [2021-08-25 19:46:56,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f7eeefa/92d0326aa3054b6d95d67d28b97090e7/FLAG43821713b [2021-08-25 19:46:57,417 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:46:57,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm.c [2021-08-25 19:46:57,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f7eeefa/92d0326aa3054b6d95d67d28b97090e7/FLAG43821713b [2021-08-25 19:46:57,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f7eeefa/92d0326aa3054b6d95d67d28b97090e7 [2021-08-25 19:46:57,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:46:57,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:46:57,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:46:57,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:46:57,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:46:57,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763421f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57, skipping insertion in model container [2021-08-25 19:46:57,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:46:57,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:46:57,580 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/sqm.c[586,599] [2021-08-25 19:46:57,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:46:57,619 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:46:57,657 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/sqm.c[586,599] [2021-08-25 19:46:57,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:46:57,702 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:46:57,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57 WrapperNode [2021-08-25 19:46:57,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:46:57,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:46:57,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:46:57,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:46:57,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:46:57,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:46:57,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:46:57,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:46:57,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:46:57,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:46:57,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:46:57,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:46:57,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (1/1) ... [2021-08-25 19:46:57,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:46:57,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:46:57,792 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 19:46:57,806 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 19:46:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-25 19:46:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:46:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-08-25 19:46:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:46:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:46:57,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:46:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-08-25 19:46:58,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:46:58,246 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:46:58,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:46:58 BoogieIcfgContainer [2021-08-25 19:46:58,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:46:58,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:46:58,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:46:58,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:46:58,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:46:57" (1/3) ... [2021-08-25 19:46:58,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41812ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:46:58, skipping insertion in model container [2021-08-25 19:46:58,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:46:57" (2/3) ... [2021-08-25 19:46:58,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41812ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:46:58, skipping insertion in model container [2021-08-25 19:46:58,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:46:58" (3/3) ... [2021-08-25 19:46:58,255 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm.c [2021-08-25 19:46:58,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:46:58,260 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:46:58,298 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:46:58,304 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 19:46:58,305 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:46:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 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 19:46:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:46:58,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:58,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:58,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:58,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:46:58,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:46:58,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874749398] [2021-08-25 19:46:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:58,338 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:46:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:46:58,341 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 19:46:58,369 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 19:46:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:58,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-25 19:46:58,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:58,548 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 19:46:58,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:46:58,605 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 19:46:58,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:46:58,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874749398] [2021-08-25 19:46:58,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874749398] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:46:58,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:46:58,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-25 19:46:58,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71897257] [2021-08-25 19:46:58,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:46:58,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:46:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:46:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:46:58,633 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 19:46:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:46:58,646 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:46:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:46:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-08-25 19:46:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:46:58,656 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:46:58,657 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:46:58,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 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 19:46:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:46:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:46:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:46:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:46:58,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:46:58,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:46:58,683 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:46:58,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 19:46:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:46:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:46:58,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:46:58,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:46:58,703 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 19:46:58,896 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 19:46:58,896 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:46:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:46:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:46:58,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:46:58,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061196569] [2021-08-25 19:46:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:46:58,898 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:46:58,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:46:58,903 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 19:46:58,905 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 19:46:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:46:59,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:46:59,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:46:59,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:59,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:59,276 INFO L354 Elim1Store]: treesize reduction 159, result has 20.5 percent of original size [2021-08-25 19:46:59,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 61 [2021-08-25 19:46:59,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:46:59,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:59,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:46:59,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:46:59,605 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 109 treesize of output 71 [2021-08-25 19:46:59,631 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 19:46:59,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:47:00,513 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 19:47:00,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:47:00,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061196569] [2021-08-25 19:47:00,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061196569] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:47:00,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:47:00,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-08-25 19:47:00,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290033691] [2021-08-25 19:47:00,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:47:00,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:47:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:47:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:47:00,517 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:47:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:47:01,924 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-08-25 19:47:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:47:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:47:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:47:01,932 INFO L225 Difference]: With dead ends: 35 [2021-08-25 19:47:01,933 INFO L226 Difference]: Without dead ends: 33 [2021-08-25 19:47:01,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 957.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:47:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-25 19:47:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-08-25 19:47:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 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 19:47:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:47:01,938 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:47:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:47:01,938 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:47:01,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:47:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:47:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:47:01,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:47:01,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:47:01,955 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 19:47:02,156 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 19:47:02,156 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:47:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:47:02,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:47:02,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:47:02,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632171651] [2021-08-25 19:47:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:47:02,158 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:47:02,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:47:02,159 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 19:47:02,160 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 19:47:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:47:02,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:47:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:47:02,537 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 19:47:02,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:47:02,660 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 19:47:02,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:47:02,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632171651] [2021-08-25 19:47:02,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632171651] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:47:02,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:47:02,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-08-25 19:47:02,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50727826] [2021-08-25 19:47:02,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:47:02,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:47:02,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:47:02,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:47:02,665 INFO L87 Difference]: Start difference. First operand 23 states and 27 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 19:47:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:47:03,310 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-25 19:47:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:47:03,316 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 14 [2021-08-25 19:47:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:47:03,317 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:47:03,317 INFO L226 Difference]: Without dead ends: 34 [2021-08-25 19:47:03,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 368.7ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:47:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-25 19:47:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-08-25 19:47:03,322 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 19:47:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:47:03,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:47:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:47:03,323 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:47:03,323 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 19:47:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:47:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:47:03,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:47:03,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:47:03,337 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 19:47:03,533 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 19:47:03,534 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:47:03,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:47:03,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:47:03,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:47:03,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634779676] [2021-08-25 19:47:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:47:03,535 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:47:03,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:47:03,537 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 19:47:03,538 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 19:47:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:47:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 19:47:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:47:03,959 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 19:47:03,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:47:04,220 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 19:47:04,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:47:04,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634779676] [2021-08-25 19:47:04,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634779676] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:47:04,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:47:04,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-25 19:47:04,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239463249] [2021-08-25 19:47:04,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 19:47:04,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:47:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 19:47:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:47:04,223 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 19:47:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:47:05,120 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-25 19:47:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-25 19:47:05,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 14 [2021-08-25 19:47:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:47:05,122 INFO L225 Difference]: With dead ends: 58 [2021-08-25 19:47:05,122 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 19:47:05,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-08-25 19:47:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 19:47:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-08-25 19:47:05,127 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 19:47:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-25 19:47:05,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2021-08-25 19:47:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:47:05,128 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-25 19:47:05,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 19:47:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-25 19:47:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:47:05,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:47:05,129 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:47:05,139 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 19:47:05,332 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 19:47:05,333 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:47:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:47:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:47:05,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:47:05,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796400250] [2021-08-25 19:47:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:47:05,334 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:47:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:47:05,335 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 19:47:05,338 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 19:47:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:47:05,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 19:47:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:47:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:47:05,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:47:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:47:06,160 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:47:06,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796400250] [2021-08-25 19:47:06,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796400250] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:47:06,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:47:06,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-25 19:47:06,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182900930] [2021-08-25 19:47:06,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:47:06,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:47:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:47:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:47:06,163 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:47:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:47:06,672 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-08-25 19:47:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:47:06,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:47:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:47:06,683 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:47:06,683 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:47:06,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-25 19:47:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:47:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-08-25 19:47:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:47:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-25 19:47:06,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-25 19:47:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:47:06,688 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-25 19:47:06,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:47:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-25 19:47:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:47:06,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:47:06,689 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:47:06,704 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 19:47:06,890 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 19:47:06,890 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:47:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:47:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:47:06,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:47:06,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341034099] [2021-08-25 19:47:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:47:06,891 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:47:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:47:06,896 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 19:47:06,906 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 19:47:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:47:07,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 19:47:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:47:07,176 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 12 treesize of output 10 [2021-08-25 19:47:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:07,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:07,194 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 54 treesize of output 41 [2021-08-25 19:47:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:07,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:07,460 INFO L354 Elim1Store]: treesize reduction 579, result has 12.4 percent of original size [2021-08-25 19:47:07,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 137 [2021-08-25 19:47:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:08,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:08,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:08,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:08,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:08,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:08,788 INFO L354 Elim1Store]: treesize reduction 1460, result has 3.5 percent of original size [2021-08-25 19:47:08,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 70 case distinctions, treesize of input 294 treesize of output 251 [2021-08-25 19:47:11,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:11,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:11,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:11,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:11,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:11,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:11,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:11,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:11,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:12,498 INFO L354 Elim1Store]: treesize reduction 1186, result has 6.2 percent of original size [2021-08-25 19:47:12,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 373 treesize of output 213 [2021-08-25 19:47:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:47:12,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:47:16,121 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 64))) (let ((.cse1 ((_ sign_extend 32) (_ bv0 32))) (.cse0 ((_ sign_extend 32) (_ bv1 32)))) (= (bvadd (bvmul (_ bv2 64) (bvmul .cse0 .cse1)) (bvmul .cse1 .cse1) (bvmul .cse0 .cse0)) (let ((.cse2 (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base (let ((.cse4 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base))) (let ((.cse5 (bvmul ((_ extract 31 0) ULTIMATE.start_main_~i~0) (_ bv8 32))) (.cse6 (bvadd (let ((.cse7 (bvmul ((_ extract 31 0) (bvadd (bvneg .cse0) ULTIMATE.start_main_~i~0)) (_ bv8 32)))) (concat (select .cse4 (bvadd .cse7 (_ bv4 32) c_ULTIMATE.start_main_~b~0.offset)) (select .cse4 (bvadd .cse7 c_ULTIMATE.start_main_~b~0.offset)))) ((_ sign_extend 32) (_ bv2 32))))) (store (store .cse4 (bvadd .cse5 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 31 0) .cse6)) (bvadd (_ bv4 32) .cse5 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 63 32) .cse6))))) c_ULTIMATE.start_main_~a~0.base)) (.cse3 (bvmul ((_ extract 31 0) .cse1) (_ bv8 32)))) (concat (select .cse2 (bvadd (_ bv4 32) .cse3 c_ULTIMATE.start_main_~a~0.offset)) (select .cse2 (bvadd .cse3 c_ULTIMATE.start_main_~a~0.offset))))))) is different from false [2021-08-25 19:47:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-08-25 19:47:16,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:47:16,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341034099] [2021-08-25 19:47:16,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341034099] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:47:16,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:47:16,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-25 19:47:16,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772245341] [2021-08-25 19:47:16,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-25 19:47:16,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:47:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-25 19:47:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=102, Unknown=1, NotChecked=20, Total=156 [2021-08-25 19:47:16,169 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 19:47:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:47:39,454 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-08-25 19:47:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-25 19:47:39,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 19:47:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:47:39,455 INFO L225 Difference]: With dead ends: 69 [2021-08-25 19:47:39,455 INFO L226 Difference]: Without dead ends: 67 [2021-08-25 19:47:39,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 17485.5ms TimeCoverageRelationStatistics Valid=181, Invalid=577, Unknown=2, NotChecked=52, Total=812 [2021-08-25 19:47:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-25 19:47:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2021-08-25 19:47:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:47:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-25 19:47:39,464 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 16 [2021-08-25 19:47:39,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:47:39,464 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-25 19:47:39,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 19:47:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-25 19:47:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:47:39,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:47:39,465 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:47:39,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-25 19:47:39,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:47:39,676 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:47:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:47:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-08-25 19:47:39,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:47:39,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307666132] [2021-08-25 19:47:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:47:39,678 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:47:39,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:47:39,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:47:39,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-25 19:47:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:47:40,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-25 19:47:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:47:40,250 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 13 treesize of output 11 [2021-08-25 19:47:40,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,272 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 54 treesize of output 41 [2021-08-25 19:47:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:40,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:40,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 101 [2021-08-25 19:47:40,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:40,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:40,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:40,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:40,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:40,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:40,846 INFO L354 Elim1Store]: treesize reduction 117, result has 17.6 percent of original size [2021-08-25 19:47:40,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 252 treesize of output 210 [2021-08-25 19:47:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:47:41,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:47:41,855 INFO L354 Elim1Store]: treesize reduction 76, result has 20.8 percent of original size [2021-08-25 19:47:41,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 6 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 329 treesize of output 166 [2021-08-25 19:47:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:47:41,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:47:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:47:46,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:47:46,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307666132] [2021-08-25 19:47:46,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307666132] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:47:46,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:47:46,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-25 19:47:46,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867079257] [2021-08-25 19:47:46,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-25 19:47:46,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:47:46,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-25 19:47:46,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:47:46,554 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:48:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:48:20,091 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-08-25 19:48:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-25 19:48:20,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:48:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:48:20,102 INFO L225 Difference]: With dead ends: 75 [2021-08-25 19:48:20,102 INFO L226 Difference]: Without dead ends: 73 [2021-08-25 19:48:20,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 21832.9ms TimeCoverageRelationStatistics Valid=224, Invalid=768, Unknown=0, NotChecked=0, Total=992 [2021-08-25 19:48:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-25 19:48:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2021-08-25 19:48:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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 19:48:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-08-25 19:48:20,114 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2021-08-25 19:48:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:48:20,114 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-08-25 19:48:20,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:48:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-08-25 19:48:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:48:20,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:48:20,118 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:48:20,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-08-25 19:48:20,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:48:20,333 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:48:20,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:48:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 2 times [2021-08-25 19:48:20,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:48:20,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896707257] [2021-08-25 19:48:20,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:48:20,334 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:48:20,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:48:20,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:48:20,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-25 19:48:20,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:48:20,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:48:20,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-25 19:48:20,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:48:20,811 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 12 treesize of output 10 [2021-08-25 19:48:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,836 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 54 treesize of output 41 [2021-08-25 19:48:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:20,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 101 [2021-08-25 19:48:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:21,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:21,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:21,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:21,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:21,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:21,452 INFO L354 Elim1Store]: treesize reduction 987, result has 11.3 percent of original size [2021-08-25 19:48:21,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 214 treesize of output 203 [2021-08-25 19:48:22,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:22,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:22,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:22,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:22,927 INFO L354 Elim1Store]: treesize reduction 514, result has 0.2 percent of original size [2021-08-25 19:48:22,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 13 disjoint index pairs (out of 91 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 361 treesize of output 281 [2021-08-25 19:48:24,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:24,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:24,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:24,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:24,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:24,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:24,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:24,739 INFO L354 Elim1Store]: treesize reduction 2028, result has 2.5 percent of original size [2021-08-25 19:48:24,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 15 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 124 case distinctions, treesize of input 496 treesize of output 409 [2021-08-25 19:48:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:31,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:31,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:48:31,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:48:32,203 INFO L354 Elim1Store]: treesize reduction 1624, result has 8.3 percent of original size [2021-08-25 19:48:32,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 15 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 571 treesize of output 343 [2021-08-25 19:48:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:48:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:48:39,866 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 64))) (let ((.cse1 ((_ sign_extend 32) (_ bv0 32))) (.cse0 ((_ sign_extend 32) (_ bv1 32)))) (= (bvadd (bvmul (_ bv2 64) (bvmul .cse0 .cse1)) (bvmul .cse1 .cse1) (bvmul .cse0 .cse0)) (let ((.cse2 (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base (let ((.cse4 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base))) (let ((.cse5 (bvmul ((_ extract 31 0) ULTIMATE.start_main_~i~0) (_ bv8 32))) (.cse6 (bvadd (let ((.cse7 (bvmul ((_ extract 31 0) (bvadd (bvneg .cse0) ULTIMATE.start_main_~i~0)) (_ bv8 32)))) (concat (select .cse4 (bvadd .cse7 (_ bv4 32) c_ULTIMATE.start_main_~b~0.offset)) (select .cse4 (bvadd .cse7 c_ULTIMATE.start_main_~b~0.offset)))) ((_ sign_extend 32) (_ bv2 32))))) (store (store .cse4 (bvadd .cse5 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 31 0) .cse6)) (bvadd (_ bv4 32) .cse5 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 63 32) .cse6))))) c_ULTIMATE.start_main_~a~0.base)) (.cse3 (bvmul ((_ extract 31 0) .cse1) (_ bv8 32)))) (concat (select .cse2 (bvadd (_ bv4 32) .cse3 c_ULTIMATE.start_main_~a~0.offset)) (select .cse2 (bvadd .cse3 c_ULTIMATE.start_main_~a~0.offset))))))) is different from false [2021-08-25 19:48:42,002 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~i~0_60 (_ BitVec 64))) (let ((.cse2 ((_ sign_extend 32) (_ bv0 32))) (.cse13 ((_ sign_extend 32) (_ bv1 32)))) (= (let ((.cse0 (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base (let ((.cse7 (bvneg .cse13)) (.cse8 ((_ sign_extend 32) (_ bv2 32)))) (let ((.cse3 (let ((.cse9 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base))) (let ((.cse10 (bvmul ((_ extract 31 0) c_ULTIMATE.start_main_~i~0) (_ bv8 32))) (.cse11 (bvadd (let ((.cse12 (bvmul ((_ extract 31 0) (bvadd .cse7 c_ULTIMATE.start_main_~i~0)) (_ bv8 32)))) (concat (select .cse9 (bvadd .cse12 (_ bv4 32) c_ULTIMATE.start_main_~b~0.offset)) (select .cse9 (bvadd .cse12 c_ULTIMATE.start_main_~b~0.offset)))) .cse8))) (store (store .cse9 (bvadd .cse10 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 31 0) .cse11)) (bvadd (_ bv4 32) .cse10 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 63 32) .cse11)))))) (let ((.cse4 (bvmul ((_ extract 31 0) v_ULTIMATE.start_main_~i~0_60) (_ bv8 32))) (.cse5 (bvadd (let ((.cse6 (bvmul ((_ extract 31 0) (bvadd .cse7 v_ULTIMATE.start_main_~i~0_60)) (_ bv8 32)))) (concat (select .cse3 (bvadd .cse6 (_ bv4 32) c_ULTIMATE.start_main_~b~0.offset)) (select .cse3 (bvadd .cse6 c_ULTIMATE.start_main_~b~0.offset)))) .cse8))) (store (store .cse3 (bvadd .cse4 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 31 0) .cse5)) (bvadd (_ bv4 32) .cse4 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 63 32) .cse5)))))) c_ULTIMATE.start_main_~a~0.base)) (.cse1 (bvmul ((_ extract 31 0) .cse2) (_ bv8 32)))) (concat (select .cse0 (bvadd (_ bv4 32) .cse1 c_ULTIMATE.start_main_~a~0.offset)) (select .cse0 (bvadd .cse1 c_ULTIMATE.start_main_~a~0.offset)))) (bvadd (bvmul (_ bv2 64) (bvmul .cse13 .cse2)) (bvmul .cse2 .cse2) (bvmul .cse13 .cse13))))) is different from false [2021-08-25 19:48:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-08-25 19:48:42,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:48:42,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896707257] [2021-08-25 19:48:42,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896707257] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:48:42,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:48:42,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-25 19:48:42,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955745398] [2021-08-25 19:48:42,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-25 19:48:42,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:48:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-25 19:48:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=214, Unknown=2, NotChecked=62, Total=342 [2021-08-25 19:48:42,068 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:49:26,606 WARN L207 SmtUtils]: Spent 7.84 s on a formula simplification. DAG size of input: 221 DAG size of output: 210 [2021-08-25 19:50:12,888 WARN L207 SmtUtils]: Spent 8.89 s on a formula simplification. DAG size of input: 224 DAG size of output: 213 [2021-08-25 19:50:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:50:20,015 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-08-25 19:50:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-25 19:50:20,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:50:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:50:20,022 INFO L225 Difference]: With dead ends: 106 [2021-08-25 19:50:20,023 INFO L226 Difference]: Without dead ends: 104 [2021-08-25 19:50:20,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 70527.1ms TimeCoverageRelationStatistics Valid=443, Invalid=1819, Unknown=2, NotChecked=186, Total=2450 [2021-08-25 19:50:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-25 19:50:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 49. [2021-08-25 19:50:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:50:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-08-25 19:50:20,042 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 20 [2021-08-25 19:50:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:50:20,042 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-08-25 19:50:20,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:50:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-08-25 19:50:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:50:20,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:50:20,045 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:50:20,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-25 19:50:20,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:50:20,258 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:50:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:50:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1504948524, now seen corresponding path program 3 times [2021-08-25 19:50:20,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:50:20,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419708885] [2021-08-25 19:50:20,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:50:20,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:50:20,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:50:20,260 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:50:20,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-08-25 19:50:20,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-25 19:50:20,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:50:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 19:50:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:50:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-25 19:50:21,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:50:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-25 19:50:21,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:50:21,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419708885] [2021-08-25 19:50:21,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419708885] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:50:21,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:50:21,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-25 19:50:21,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836660296] [2021-08-25 19:50:21,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-25 19:50:21,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:50:21,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-25 19:50:21,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:50:21,572 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 19:50:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:50:23,101 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-08-25 19:50:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-25 19:50:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 19:50:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:50:23,103 INFO L225 Difference]: With dead ends: 92 [2021-08-25 19:50:23,103 INFO L226 Difference]: Without dead ends: 77 [2021-08-25 19:50:23,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1215.4ms TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-08-25 19:50:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-25 19:50:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2021-08-25 19:50:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:50:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-08-25 19:50:23,116 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 22 [2021-08-25 19:50:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:50:23,116 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-08-25 19:50:23,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 19:50:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-08-25 19:50:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:50:23,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:50:23,117 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:50:23,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-08-25 19:50:23,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:50:23,330 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:50:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:50:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2021-08-25 19:50:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:50:23,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056415695] [2021-08-25 19:50:23,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:50:23,331 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:50:23,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:50:23,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:50:23,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-08-25 19:50:23,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:50:23,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:50:23,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-25 19:50:23,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:50:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:50:24,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:50:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:50:24,977 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:50:24,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056415695] [2021-08-25 19:50:24,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056415695] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:50:24,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:50:24,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-25 19:50:24,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567999341] [2021-08-25 19:50:24,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-25 19:50:24,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:50:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-25 19:50:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-25 19:50:24,980 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 19:50:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:50:26,576 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-08-25 19:50:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-25 19:50:26,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) Word has length 24 [2021-08-25 19:50:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:50:26,587 INFO L225 Difference]: With dead ends: 80 [2021-08-25 19:50:26,587 INFO L226 Difference]: Without dead ends: 60 [2021-08-25 19:50:26,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1379.6ms TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-08-25 19:50:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-25 19:50:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-08-25 19:50:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 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 19:50:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-08-25 19:50:26,599 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2021-08-25 19:50:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:50:26,599 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-08-25 19:50:26,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 19:50:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-08-25 19:50:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:50:26,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:50:26,600 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:50:26,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-08-25 19:50:26,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:50:26,818 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:50:26,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:50:26,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2021-08-25 19:50:26,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:50:26,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626549220] [2021-08-25 19:50:26,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:50:26,819 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:50:26,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:50:26,822 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:50:26,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-08-25 19:50:27,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:50:27,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:50:27,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-25 19:50:27,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:50:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:50:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:50:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:50:27,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:50:27,571 INFO L354 Elim1Store]: treesize reduction 38, result has 35.6 percent of original size [2021-08-25 19:50:27,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 41 [2021-08-25 19:50:27,594 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 12 treesize of output 10 [2021-08-25 19:50:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:50:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:50:27,957 INFO L354 Elim1Store]: treesize reduction 579, result has 12.4 percent of original size [2021-08-25 19:50:27,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 137 [2021-08-25 19:50:28,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:50:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:51:41,826 WARN L207 SmtUtils]: Spent 1.22 m on a formula simplification. DAG size of input: 248 DAG size of output: 110 [2021-08-25 19:51:41,827 INFO L354 Elim1Store]: treesize reduction 1327, result has 21.7 percent of original size [2021-08-25 19:51:41,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 237 treesize of output 455 [2021-08-25 19:54:02,916 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 19:54:02,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:54:02,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626549220] [2021-08-25 19:54:02,918 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)) Received EOF on stdin. stderr output: (error "out of memory") [2021-08-25 19:54:02,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1035534549] [2021-08-25 19:54:02,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:54:02,918 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-25 19:54:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-25 19:54:02,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-25 19:54:02,921 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 19:54:02,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-08-25 19:54:04,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:54:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:54:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-25 19:54:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:54:04,116 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 19:54:04,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850431532] [2021-08-25 19:54:04,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:54:04,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:54:04,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:54:04,118 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:54:04,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-25 19:54:04,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:54:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:54:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-25 19:54:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:54:04,624 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 19:54:04,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:54:04,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:54:04,624 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-25 19:54:04,624 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:54:04,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:54:04,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-25 19:54:04,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-08-25 19:54:05,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-08-25 19:54:05,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:54:05,234 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:54:05,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:54:05 BoogieIcfgContainer [2021-08-25 19:54:05,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:54:05,246 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:54:05,246 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:54:05,247 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:54:05,247 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:46:58" (3/4) ... [2021-08-25 19:54:05,250 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:54:05,250 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:54:05,251 INFO L168 Benchmark]: Toolchain (without parser) took 427799.59 ms. Allocated memory was 60.8 MB in the beginning and 113.2 MB in the end (delta: 52.4 MB). Free memory was 39.5 MB in the beginning and 29.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 62.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:54:05,251 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 60.8 MB. Free memory was 42.7 MB in the beginning and 42.6 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:54:05,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.05 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 43.4 MB in the end (delta: -4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:54:05,251 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.14 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 41.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:54:05,252 INFO L168 Benchmark]: Boogie Preprocessor took 24.47 ms. Allocated memory is still 60.8 MB. Free memory was 41.8 MB in the beginning and 40.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:54:05,252 INFO L168 Benchmark]: RCFGBuilder took 487.69 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 40.3 MB in the beginning and 55.7 MB in the end (delta: -15.4 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-08-25 19:54:05,252 INFO L168 Benchmark]: TraceAbstraction took 426996.84 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 55.4 MB in the beginning and 29.0 MB in the end (delta: 26.4 MB). Peak memory consumption was 62.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:54:05,253 INFO L168 Benchmark]: Witness Printer took 3.61 ms. Allocated memory is still 113.2 MB. Free memory is still 29.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:54:05,254 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 60.8 MB. Free memory was 42.7 MB in the beginning and 42.6 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.05 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 43.4 MB in the end (delta: -4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.14 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 41.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.47 ms. Allocated memory is still 60.8 MB. Free memory was 41.8 MB in the beginning and 40.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 487.69 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 40.3 MB in the beginning and 55.7 MB in the end (delta: -15.4 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 426996.84 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 55.4 MB in the beginning and 29.0 MB in the end (delta: 26.4 MB). Peak memory consumption was 62.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.61 ms. Allocated memory is still 113.2 MB. Free memory is still 29.0 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); [L31] b[0] = 1 [L32] a[0] = 1 [L34] i=1 [L34] COND TRUE i