./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn5.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/eqn5.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 e073edc56aff813529d4e364baa44cd4d0bb851f .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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/eqn5.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 e073edc56aff813529d4e364baa44cd4d0bb851f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:05:08,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:05:08,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:05:08,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:05:08,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:05:08,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:05:08,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:05:08,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:05:08,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:05:08,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:05:08,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:05:08,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:05:08,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:05:08,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:05:08,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:05:08,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:05:08,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:05:08,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:05:08,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:05:08,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:05:08,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:05:08,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:05:08,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:05:08,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:05:08,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:05:08,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:05:08,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:05:08,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:05:08,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:05:08,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:05:08,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:05:08,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:05:08,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:05:08,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:05:08,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:05:08,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:05:08,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:05:08,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:05:08,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:05:08,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:05:08,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:05:08,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:05:08,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:05:08,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:05:08,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:05:08,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:05:08,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:05:08,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:05:08,400 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:05:08,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:05:08,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:05:08,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:05:08,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:05:08,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:05:08,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:05:08,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:05:08,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:05:08,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:05:08,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:05:08,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:05:08,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:05:08,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:05:08,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:05:08,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:05:08,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:05:08,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:05:08,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:05:08,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:05:08,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:05:08,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:05:08,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:05:08,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:05:08,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e073edc56aff813529d4e364baa44cd4d0bb851f [2021-08-25 19:05:08,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:05:08,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:05:08,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:05:08,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:05:08,639 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:05:08,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5.c [2021-08-25 19:05:08,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/695513f4e/bd1e92924b26468c8ce1dba346a45b85/FLAG0a71a2889 [2021-08-25 19:05:09,058 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:05:09,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c [2021-08-25 19:05:09,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/695513f4e/bd1e92924b26468c8ce1dba346a45b85/FLAG0a71a2889 [2021-08-25 19:05:09,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/695513f4e/bd1e92924b26468c8ce1dba346a45b85 [2021-08-25 19:05:09,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:05:09,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:05:09,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:09,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:05:09,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:05:09,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b41c25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09, skipping insertion in model container [2021-08-25 19:05:09,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:05:09,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:05:09,169 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/eqn5.c[587,600] [2021-08-25 19:05:09,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:09,187 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:05:09,195 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/eqn5.c[587,600] [2021-08-25 19:05:09,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:09,235 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:05:09,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09 WrapperNode [2021-08-25 19:05:09,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:09,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:09,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:05:09,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:05:09,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:09,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:05:09,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:05:09,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:05:09,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:05:09,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:05:09,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:05:09,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:05:09,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (1/1) ... [2021-08-25 19:05:09,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:05:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:09,318 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 19:05:09,342 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 19:05:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:05:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:05:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:05:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:05:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:05:09,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:05:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:05:09,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:05:09,547 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:05:09,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:09 BoogieIcfgContainer [2021-08-25 19:05:09,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:05:09,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:05:09,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:05:09,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:05:09,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:05:09" (1/3) ... [2021-08-25 19:05:09,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306da66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:09, skipping insertion in model container [2021-08-25 19:05:09,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:09" (2/3) ... [2021-08-25 19:05:09,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306da66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:09, skipping insertion in model container [2021-08-25 19:05:09,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:09" (3/3) ... [2021-08-25 19:05:09,555 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5.c [2021-08-25 19:05:09,558 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:05:09,558 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:05:09,587 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:05:09,591 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 19:05:09,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:05:09,610 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 19:05:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:09,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:09,614 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:09,614 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:09,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:05:09,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:09,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506465480] [2021-08-25 19:05:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:09,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:09,768 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 19:05:09,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:09,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506465480] [2021-08-25 19:05:09,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506465480] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:09,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:09,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:05:09,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877034965] [2021-08-25 19:05:09,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:05:09,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:05:09,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:05:09,797 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 19:05:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:09,808 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:05:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:05:09,809 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 19:05:09,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:09,814 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:05:09,814 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:05:09,816 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 19:05:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:05:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:05:09,836 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 19:05:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:05:09,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:05:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:09,838 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:05:09,838 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 19:05:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:05:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:09,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:09,839 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:09,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:05:09,839 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:05:09,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:09,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471457156] [2021-08-25 19:05:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:09,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:09,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:09,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539757548] [2021-08-25 19:05:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:09,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:09,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:09,880 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 19:05:09,882 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 19:05:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:10,044 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-25 19:05:10,045 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 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-25 19:05:10,196 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 19:05:10,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:10,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471457156] [2021-08-25 19:05:10,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:10,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539757548] [2021-08-25 19:05:10,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539757548] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:10,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:10,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:05:10,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724759437] [2021-08-25 19:05:10,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:05:10,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:05:10,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:05:10,208 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 19:05:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:10,294 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-25 19:05:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:05:10,295 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 19:05:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:10,297 INFO L225 Difference]: With dead ends: 34 [2021-08-25 19:05:10,298 INFO L226 Difference]: Without dead ends: 32 [2021-08-25 19:05:10,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-25 19:05:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-25 19:05:10,304 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 19:05:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:05:10,306 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:05:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:10,306 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:05:10,307 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 19:05:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:05:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:10,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:10,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:10,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-25 19:05:10,527 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 19:05:10,529 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:10,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:05:10,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:10,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81148303] [2021-08-25 19:05:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:10,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:10,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:10,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760808430] [2021-08-25 19:05:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:10,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:10,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:10,554 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 19:05:10,600 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 19:05:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:10,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:05:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:10,669 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 19:05:10,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:10,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81148303] [2021-08-25 19:05:10,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:10,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760808430] [2021-08-25 19:05:10,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760808430] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:10,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:10,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:05:10,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297390086] [2021-08-25 19:05:10,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:05:10,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:05:10,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:05:10,671 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 19:05:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:10,725 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-08-25 19:05:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:05:10,725 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 19:05:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:10,726 INFO L225 Difference]: With dead ends: 49 [2021-08-25 19:05:10,726 INFO L226 Difference]: Without dead ends: 40 [2021-08-25 19:05:10,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-25 19:05:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-08-25 19:05:10,729 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 19:05:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:05:10,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:05:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:10,729 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:05:10,730 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 19:05:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:05:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:10,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:10,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:10,750 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 19:05:10,944 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 19:05:10,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:05:10,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:10,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713321924] [2021-08-25 19:05:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:10,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:10,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:10,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985152513] [2021-08-25 19:05:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:10,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:10,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:10,965 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 19:05:11,012 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 19:05:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:05:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:11,121 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 19:05:11,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:11,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713321924] [2021-08-25 19:05:11,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:11,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985152513] [2021-08-25 19:05:11,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985152513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:11,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:11,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 19:05:11,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340862304] [2021-08-25 19:05:11,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:05:11,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:11,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:05:11,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:05:11,124 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 19:05:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:11,201 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-25 19:05:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:05:11,201 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 19:05:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:11,202 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:05:11,202 INFO L226 Difference]: Without dead ends: 37 [2021-08-25 19:05:11,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-25 19:05:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-08-25 19:05:11,209 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 19:05:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-25 19:05:11,210 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-08-25 19:05:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:11,210 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-25 19:05:11,210 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 19:05:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-25 19:05:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:11,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:11,211 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:11,231 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 19:05:11,430 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 19:05:11,431 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:05:11,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:11,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545949052] [2021-08-25 19:05:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:11,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:11,439 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:11,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757334059] [2021-08-25 19:05:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:11,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:11,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:11,446 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 19:05:11,448 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 19:05:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:11,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 19:05:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:11,607 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 19:05:11,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:11,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545949052] [2021-08-25 19:05:11,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:11,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757334059] [2021-08-25 19:05:11,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757334059] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:11,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:11,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-25 19:05:11,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118264036] [2021-08-25 19:05:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 19:05:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 19:05:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:05:11,614 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 19:05:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:11,693 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-08-25 19:05:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:05:11,694 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 19:05:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:11,694 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:05:11,694 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:05:11,695 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 19:05:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:05:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-25 19:05:11,696 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 19:05:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-25 19:05:11,697 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-08-25 19:05:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:11,697 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-25 19:05:11,697 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 19:05:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-25 19:05:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:11,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:11,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:11,716 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 19:05:11,904 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 19:05:11,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:11,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:11,906 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:05:11,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:11,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441370293] [2021-08-25 19:05:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:11,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:11,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:11,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879556123] [2021-08-25 19:05:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:11,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:11,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:11,930 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 19:05:11,934 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 19:05:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:12,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 19:05:12,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:12,058 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 19:05:12,064 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 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:05:12,119 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-25 19:05:12,120 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 19:05:12,299 INFO L354 Elim1Store]: treesize reduction 124, result has 16.2 percent of original size [2021-08-25 19:05:12,299 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 59 treesize of output 50 [2021-08-25 19:05:12,513 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 19:05:12,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:12,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441370293] [2021-08-25 19:05:12,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:12,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879556123] [2021-08-25 19:05:12,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879556123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:12,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:12,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:05:12,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582863263] [2021-08-25 19:05:12,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:05:12,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:12,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:05:12,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:05:12,515 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 19:05:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:12,785 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-08-25 19:05:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 19:05:12,786 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 19:05:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:12,786 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:05:12,787 INFO L226 Difference]: Without dead ends: 41 [2021-08-25 19:05:12,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:05:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-25 19:05:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-08-25 19:05:12,789 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 19:05:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-25 19:05:12,790 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-08-25 19:05:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:12,790 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-25 19:05:12,790 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 19:05:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-25 19:05:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:05:12,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:12,791 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:12,809 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 19:05:13,008 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 19:05:13,009 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-08-25 19:05:13,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:13,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297727269] [2021-08-25 19:05:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:13,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:13,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:13,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922229083] [2021-08-25 19:05:13,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:05:13,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:13,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:13,031 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 19:05:13,031 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 19:05:13,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:05:13,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:13,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:05:13,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:13,205 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 19:05:13,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:13,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297727269] [2021-08-25 19:05:13,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:13,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922229083] [2021-08-25 19:05:13,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922229083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:13,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:13,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:05:13,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756524248] [2021-08-25 19:05:13,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:05:13,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:13,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:05:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:13,207 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 19:05:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:13,306 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-08-25 19:05:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:05:13,307 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 19:05:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:13,307 INFO L225 Difference]: With dead ends: 65 [2021-08-25 19:05:13,307 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:05:13,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:05:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:05:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-08-25 19:05:13,310 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 19:05:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-08-25 19:05:13,311 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-08-25 19:05:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:13,311 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-08-25 19:05:13,311 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 19:05:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-08-25 19:05:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:05:13,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:13,312 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:13,331 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 19:05:13,520 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 19:05:13,521 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:13,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2021-08-25 19:05:13,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:13,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800377771] [2021-08-25 19:05:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:13,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:13,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:13,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095815537] [2021-08-25 19:05:13,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:05:13,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:13,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:13,545 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 19:05:13,576 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 19:05:13,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:05:13,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:13,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:05:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:13,753 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 19:05:13,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:13,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800377771] [2021-08-25 19:05:13,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:13,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095815537] [2021-08-25 19:05:13,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095815537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:13,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:13,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:05:13,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115035790] [2021-08-25 19:05:13,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:05:13,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:13,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:05:13,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:05:13,755 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 19:05:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:13,839 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-25 19:05:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:13,840 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 19:05:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:13,840 INFO L225 Difference]: With dead ends: 60 [2021-08-25 19:05:13,840 INFO L226 Difference]: Without dead ends: 53 [2021-08-25 19:05:13,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:05:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-25 19:05:13,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-08-25 19:05:13,843 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 19:05:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-08-25 19:05:13,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2021-08-25 19:05:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:13,844 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-08-25 19:05:13,844 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 19:05:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-08-25 19:05:13,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:05:13,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:13,845 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:13,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:14,064 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 19:05:14,064 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:14,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2021-08-25 19:05:14,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:14,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483423055] [2021-08-25 19:05:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:14,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:14,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:14,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345326029] [2021-08-25 19:05:14,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:05:14,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:14,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:14,084 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 19:05:14,104 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 19:05:14,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:05:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:14,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-25 19:05:14,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:14,305 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 19:05:14,310 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 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:05:14,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,374 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-25 19:05:14,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-08-25 19:05:14,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:05:14,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:05:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,502 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 187 treesize of output 95 [2021-08-25 19:05:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:14,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 68 [2021-08-25 19:05:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,544 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:14,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 45 [2021-08-25 19:05:14,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,630 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:14,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-08-25 19:05:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,821 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-08-25 19:05:14,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 268 treesize of output 510 [2021-08-25 19:05:14,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:14,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:14,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 162 [2021-08-25 19:05:14,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:05:15,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:15,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:15,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 376 treesize of output 237 [2021-08-25 19:05:15,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:15,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:15,059 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-25 19:05:15,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 202 treesize of output 125 [2021-08-25 19:05:15,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:15,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:15,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:15,224 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-25 19:05:15,225 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 85 treesize of output 70 [2021-08-25 19:05:15,403 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 19:05:15,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:15,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483423055] [2021-08-25 19:05:15,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:15,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345326029] [2021-08-25 19:05:15,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345326029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:15,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:15,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 19:05:15,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312012320] [2021-08-25 19:05:15,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:05:15,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:05:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:05:15,405 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 19:05:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:15,932 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-08-25 19:05:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-25 19:05:15,933 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 19:05:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:15,933 INFO L225 Difference]: With dead ends: 64 [2021-08-25 19:05:15,933 INFO L226 Difference]: Without dead ends: 62 [2021-08-25 19:05:15,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-25 19:05:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-25 19:05:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2021-08-25 19:05:15,942 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 19:05:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-08-25 19:05:15,943 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 20 [2021-08-25 19:05:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:15,943 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-08-25 19:05:15,944 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 19:05:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-08-25 19:05:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:05:15,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:15,945 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:15,964 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 19:05:16,157 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 19:05:16,157 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:16,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:16,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 5 times [2021-08-25 19:05:16,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:16,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646973828] [2021-08-25 19:05:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:16,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:16,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:16,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408335848] [2021-08-25 19:05:16,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 19:05:16,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:16,182 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 19:05:16,183 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 19:05:19,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-25 19:05:19,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:19,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:19,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:19,597 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 19:05:19,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:19,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646973828] [2021-08-25 19:05:19,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:19,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408335848] [2021-08-25 19:05:19,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408335848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:19,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:19,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:05:19,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302764849] [2021-08-25 19:05:19,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:05:19,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:05:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:05:19,599 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 19:05:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:19,722 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-08-25 19:05:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:05:19,723 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 19:05:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:19,725 INFO L225 Difference]: With dead ends: 97 [2021-08-25 19:05:19,725 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 19:05:19,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-25 19:05:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 19:05:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-08-25 19:05:19,730 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 19:05:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-08-25 19:05:19,731 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 22 [2021-08-25 19:05:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:19,731 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-08-25 19:05:19,731 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 19:05:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-08-25 19:05:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:05:19,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:19,732 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:19,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:19,943 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 19:05:19,943 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:19,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 6 times [2021-08-25 19:05:19,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:19,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563231404] [2021-08-25 19:05:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:19,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:19,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:19,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914534688] [2021-08-25 19:05:19,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 19:05:19,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:19,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:19,979 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 19:05:19,989 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 19:05:20,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-25 19:05:20,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:05:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:20,285 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 19:05:20,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:20,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563231404] [2021-08-25 19:05:20,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:20,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914534688] [2021-08-25 19:05:20,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914534688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:20,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:20,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:05:20,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637681951] [2021-08-25 19:05:20,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:05:20,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:20,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:05:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:05:20,287 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 19:05:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:20,432 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-08-25 19:05:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 19:05:20,433 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 19:05:20,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:20,433 INFO L225 Difference]: With dead ends: 81 [2021-08-25 19:05:20,433 INFO L226 Difference]: Without dead ends: 74 [2021-08-25 19:05:20,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:05:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-25 19:05:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-08-25 19:05:20,437 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 19:05:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-08-25 19:05:20,437 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 22 [2021-08-25 19:05:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:20,437 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-08-25 19:05:20,437 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 19:05:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-08-25 19:05:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:05:20,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:20,437 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 19:05:20,458 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 19:05:20,638 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 19:05:20,638 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:20,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 1 times [2021-08-25 19:05:20,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:20,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191509388] [2021-08-25 19:05:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:20,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:20,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:20,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85659820] [2021-08-25 19:05:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:20,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:20,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:20,656 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 19:05:20,657 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 19:05:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:20,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 19:05:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:20,915 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 19:05:20,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:20,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191509388] [2021-08-25 19:05:20,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:20,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85659820] [2021-08-25 19:05:20,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85659820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:05:20,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:05:20,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:05:20,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969173539] [2021-08-25 19:05:20,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:05:20,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:05:20,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:05:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:05:20,918 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 19:05:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:21,000 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-08-25 19:05:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:21,001 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 19:05:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:21,002 INFO L225 Difference]: With dead ends: 76 [2021-08-25 19:05:21,002 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:05:21,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:05:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:05:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2021-08-25 19:05:21,007 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 19:05:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-25 19:05:21,008 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 24 [2021-08-25 19:05:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:21,008 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-25 19:05:21,008 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 19:05:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-25 19:05:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:05:21,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:21,009 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:21,026 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 19:05:21,225 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 19:05:21,225 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 7 times [2021-08-25 19:05:21,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:05:21,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819177113] [2021-08-25 19:05:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:21,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:05:21,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:05:21,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074078783] [2021-08-25 19:05:21,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 19:05:21,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:05:21,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:21,238 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 19:05:21,239 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 19:05:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:21,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-25 19:05:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:21,729 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 19:05:21,733 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 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:05:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,800 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-25 19:05:21,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-08-25 19:05:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:21,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,835 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 103 treesize of output 59 [2021-08-25 19:05:21,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,879 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 161 treesize of output 79 [2021-08-25 19:05:21,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:21,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,899 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-08-25 19:05:21,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 81 [2021-08-25 19:05:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:21,992 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:05:21,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-08-25 19:05:22,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,474 INFO L354 Elim1Store]: treesize reduction 1177, result has 19.5 percent of original size [2021-08-25 19:05:22,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 39 case distinctions, treesize of input 216 treesize of output 418 [2021-08-25 19:05:22,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,619 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 145 treesize of output 90 [2021-08-25 19:05:22,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:22,903 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-25 19:05:22,904 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 161 treesize of output 130 [2021-08-25 19:05:23,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,081 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 183 treesize of output 109 [2021-08-25 19:05:23,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:23,247 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-25 19:05:23,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 100 [2021-08-25 19:05:24,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:05:24,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819177113] [2021-08-25 19:05:24,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:05:24,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074078783] [2021-08-25 19:05:24,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-25 19:05:24,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:24,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:05:24,540 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-08-25 19:05:24,540 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:05:24,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:05:24,562 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 19:05:24,745 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 19:05:24,749 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:05:24,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:05:24 BoogieIcfgContainer [2021-08-25 19:05:24,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:05:24,761 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:05:24,761 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:05:24,761 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:05:24,761 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:09" (3/4) ... [2021-08-25 19:05:24,763 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:05:24,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:05:24,764 INFO L168 Benchmark]: Toolchain (without parser) took 15688.01 ms. Allocated memory was 71.3 MB in the beginning and 136.3 MB in the end (delta: 65.0 MB). Free memory was 53.6 MB in the beginning and 40.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 77.8 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:24,764 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 71.3 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 36.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:05:24,765 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.87 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 54.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:24,765 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.89 ms. Allocated memory is still 71.3 MB. Free memory was 54.8 MB in the beginning and 53.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:05:24,765 INFO L168 Benchmark]: Boogie Preprocessor took 15.19 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 51.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:05:24,765 INFO L168 Benchmark]: RCFGBuilder took 273.35 ms. Allocated memory is still 71.3 MB. Free memory was 51.7 MB in the beginning and 36.0 MB in the end (delta: 15.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:24,765 INFO L168 Benchmark]: TraceAbstraction took 15210.45 ms. Allocated memory was 71.3 MB in the beginning and 136.3 MB in the end (delta: 65.0 MB). Free memory was 35.5 MB in the beginning and 40.4 MB in the end (delta: -4.9 MB). Peak memory consumption was 66.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:05:24,766 INFO L168 Benchmark]: Witness Printer took 2.77 ms. Allocated memory is still 136.3 MB. Free memory is still 40.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:05:24,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 71.3 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 36.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 160.87 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 54.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.89 ms. Allocated memory is still 71.3 MB. Free memory was 54.8 MB in the beginning and 53.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.19 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 51.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 273.35 ms. Allocated memory is still 71.3 MB. Free memory was 51.7 MB in the beginning and 36.0 MB in the end (delta: 15.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15210.45 ms. Allocated memory was 71.3 MB in the beginning and 136.3 MB in the end (delta: 65.0 MB). Free memory was 35.5 MB in the beginning and 40.4 MB in the end (delta: -4.9 MB). Peak memory consumption was 66.5 MB. Max. memory is 16.1 GB. * Witness Printer took 2.77 ms. Allocated memory is still 136.3 MB. Free memory is still 40.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 10 [L32] b[0] = 1 [L33] i=1 [L33] 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 -> e073edc56aff813529d4e364baa44cd4d0bb851f [2021-08-25 19:05:26,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:05:26,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:05:26,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:05:26,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:05:26,765 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:05:26,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5.c [2021-08-25 19:05:26,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d8d160a/6901b0ff8b34471ab83b79ec7b617bb0/FLAG78e0936ad [2021-08-25 19:05:27,232 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:05:27,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c [2021-08-25 19:05:27,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d8d160a/6901b0ff8b34471ab83b79ec7b617bb0/FLAG78e0936ad [2021-08-25 19:05:27,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d8d160a/6901b0ff8b34471ab83b79ec7b617bb0 [2021-08-25 19:05:27,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:05:27,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:05:27,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:27,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:05:27,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:05:27,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ba0798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27, skipping insertion in model container [2021-08-25 19:05:27,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:05:27,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:05:27,360 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/eqn5.c[587,600] [2021-08-25 19:05:27,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:27,391 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:05:27,422 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/eqn5.c[587,600] [2021-08-25 19:05:27,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:27,449 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:05:27,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27 WrapperNode [2021-08-25 19:05:27,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:27,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:27,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:05:27,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:05:27,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:27,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:05:27,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:05:27,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:05:27,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:05:27,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:05:27,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:05:27,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:05:27,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (1/1) ... [2021-08-25 19:05:27,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:05:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:27,602 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 19:05:27,627 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 19:05:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-25 19:05:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:05:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-08-25 19:05:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:05:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:05:27,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:05:27,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-08-25 19:05:28,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:05:28,015 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:05:28,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:28 BoogieIcfgContainer [2021-08-25 19:05:28,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:05:28,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:05:28,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:05:28,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:05:28,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:05:27" (1/3) ... [2021-08-25 19:05:28,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fce0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:28, skipping insertion in model container [2021-08-25 19:05:28,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:27" (2/3) ... [2021-08-25 19:05:28,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fce0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:28, skipping insertion in model container [2021-08-25 19:05:28,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:28" (3/3) ... [2021-08-25 19:05:28,023 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5.c [2021-08-25 19:05:28,033 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:05:28,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:05:28,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:05:28,076 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 19:05:28,076 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:05:28,088 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 19:05:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:28,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:28,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:28,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:28,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:05:28,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:28,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494226931] [2021-08-25 19:05:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:28,114 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:28,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:28,121 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 19:05:28,130 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 19:05:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-25 19:05:28,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:28,282 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 19:05:28,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:28,327 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 19:05:28,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:28,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494226931] [2021-08-25 19:05:28,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494226931] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:28,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:28,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-25 19:05:28,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611895484] [2021-08-25 19:05:28,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:05:28,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:05:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:05:28,342 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 19:05:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:28,351 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:05:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:05:28,352 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 19:05:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:28,356 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:05:28,356 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:05:28,358 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 19:05:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:05:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:05:28,390 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 19:05:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:05:28,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:05:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:28,391 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:05:28,391 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 19:05:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:05:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:28,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:28,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:28,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-25 19:05:28,600 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 19:05:28,601 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:28,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:05:28,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:28,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998492899] [2021-08-25 19:05:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:28,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:28,606 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 19:05:28,612 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 19:05:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:28,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:28,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:28,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:28,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:28,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:28,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:28,895 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-08-25 19:05:28,895 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 2 case distinctions, treesize of input 54 treesize of output 68 [2021-08-25 19:05:29,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:29,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:29,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:29,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:05:29,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 65 [2021-08-25 19:05:29,081 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 19:05:29,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:29,686 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 19:05:29,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:29,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998492899] [2021-08-25 19:05:29,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998492899] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:29,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:29,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-08-25 19:05:29,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738570175] [2021-08-25 19:05:29,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:05:29,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:29,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:05:29,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:05:29,690 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 19:05:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:30,906 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-08-25 19:05:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:05:30,916 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 19:05:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:30,916 INFO L225 Difference]: With dead ends: 35 [2021-08-25 19:05:30,916 INFO L226 Difference]: Without dead ends: 33 [2021-08-25 19:05:30,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:05:30,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-25 19:05:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-08-25 19:05:30,920 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 19:05:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:05:30,920 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:05:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:30,921 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:05:30,921 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 19:05:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:05:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:30,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:30,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:30,929 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 19:05:31,128 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 19:05:31,129 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:05:31,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:31,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646382796] [2021-08-25 19:05:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:31,130 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:31,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:31,131 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 19:05:31,132 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 19:05:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:31,432 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 19:05:31,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:31,528 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 19:05:31,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:31,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646382796] [2021-08-25 19:05:31,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646382796] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:31,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:31,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-08-25 19:05:31,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922346516] [2021-08-25 19:05:31,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:05:31,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:05:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:05:31,530 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 19:05:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:32,025 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-25 19:05:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:32,032 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 19:05:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:32,033 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:05:32,033 INFO L226 Difference]: Without dead ends: 34 [2021-08-25 19:05:32,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:05:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-25 19:05:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-08-25 19:05:32,036 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 19:05:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:05:32,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:05:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:32,037 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:05:32,037 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 19:05:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:05:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:32,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:32,037 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:32,045 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 19:05:32,240 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 19:05:32,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:32,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:05:32,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:32,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177616672] [2021-08-25 19:05:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:32,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:32,248 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 19:05:32,249 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 19:05:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 19:05:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:32,593 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 19:05:32,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:32,806 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 19:05:32,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:32,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177616672] [2021-08-25 19:05:32,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177616672] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:32,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:32,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-25 19:05:32,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719833881] [2021-08-25 19:05:32,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 19:05:32,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 19:05:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:05:32,808 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 19:05:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:33,545 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-25 19:05:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-25 19:05:33,550 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 19:05:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:33,551 INFO L225 Difference]: With dead ends: 58 [2021-08-25 19:05:33,551 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 19:05:33,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-08-25 19:05:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 19:05:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-08-25 19:05:33,555 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 19:05:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-25 19:05:33,555 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2021-08-25 19:05:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:33,555 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-25 19:05:33,556 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 19:05:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-25 19:05:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:33,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:33,556 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:33,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-08-25 19:05:33,765 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 19:05:33,765 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:05:33,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:33,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441531992] [2021-08-25 19:05:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:33,766 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:33,767 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 19:05:33,770 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 19:05:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:34,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 19:05:34,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:34,252 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 19:05:34,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:34,387 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 19:05:34,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:34,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441531992] [2021-08-25 19:05:34,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441531992] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:34,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:34,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-25 19:05:34,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235145227] [2021-08-25 19:05:34,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:05:34,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:34,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:05:34,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:05:34,389 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 19:05:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:34,815 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-08-25 19:05:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:34,822 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 19:05:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:34,823 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:05:34,823 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:05:34,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-25 19:05:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:05:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-08-25 19:05:34,829 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 19:05:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-25 19:05:34,830 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-25 19:05:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:34,830 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-25 19:05:34,831 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 19:05:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-25 19:05:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:34,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:34,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:34,840 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 19:05:35,034 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 19:05:35,035 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:35,036 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:05:35,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:35,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67062258] [2021-08-25 19:05:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:35,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:35,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:35,037 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 19:05:35,041 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 19:05:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 19:05:35,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:35,303 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 19:05:35,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:35,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:35,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:35,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 19:05:35,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:35,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:35,641 INFO L354 Elim1Store]: treesize reduction 883, result has 10.4 percent of original size [2021-08-25 19:05:35,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 132 treesize of output 141 [2021-08-25 19:05:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,758 INFO L354 Elim1Store]: treesize reduction 1444, result has 3.5 percent of original size [2021-08-25 19:05:36,759 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 290 treesize of output 247 [2021-08-25 19:05:39,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:39,679 INFO L354 Elim1Store]: treesize reduction 1186, result has 6.2 percent of original size [2021-08-25 19:05:39,680 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 363 treesize of output 203 [2021-08-25 19:05:39,729 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 19:05:39,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:47,262 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 19:05:47,262 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:47,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67062258] [2021-08-25 19:05:47,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67062258] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:47,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:47,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-25 19:05:47,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881800891] [2021-08-25 19:05:47,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-25 19:05:47,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-25 19:05:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=117, Unknown=2, NotChecked=0, Total=156 [2021-08-25 19:05:47,265 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 19:05:57,710 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse8 ((_ sign_extend 32) (_ bv1 32))) (.cse2 ((_ sign_extend 32) (_ bv0 32)))) (= (let ((.cse0 (let ((.cse3 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base))) (let ((.cse4 (bvmul ((_ extract 31 0) c_ULTIMATE.start_main_~i~0) (_ bv8 32))) (.cse5 (let ((.cse6 (bvmul ((_ extract 31 0) (bvadd (bvneg .cse8) c_ULTIMATE.start_main_~i~0)) (_ bv8 32)))) (bvadd (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))) (let ((.cse7 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (concat (select .cse7 (bvadd .cse6 (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (select .cse7 (bvadd .cse6 c_ULTIMATE.start_main_~a~0.offset)))))))) (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))))) (.cse1 (bvmul ((_ extract 31 0) .cse2) (_ bv8 32)))) (concat (select .cse0 (bvadd (_ bv4 32) .cse1 c_ULTIMATE.start_main_~b~0.offset)) (select .cse0 (bvadd .cse1 c_ULTIMATE.start_main_~b~0.offset)))) (let ((.cse9 ((_ sign_extend 32) (_ bv5 32)))) (bvadd (bvmul .cse9 .cse2 .cse2) .cse8 (bvmul .cse9 .cse2))))) (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 64))) (let ((.cse17 ((_ sign_extend 32) (_ bv1 32))) (.cse12 ((_ sign_extend 32) (_ bv0 32)))) (= (let ((.cse10 (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse13 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (let ((.cse14 (bvmul ((_ extract 31 0) ULTIMATE.start_main_~i~0) (_ bv8 32))) (.cse15 (bvadd (let ((.cse16 (bvmul ((_ extract 31 0) (bvadd (bvneg .cse17) ULTIMATE.start_main_~i~0)) (_ bv8 32)))) (concat (select .cse13 (bvadd .cse16 (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (select .cse13 (bvadd .cse16 c_ULTIMATE.start_main_~a~0.offset)))) ((_ sign_extend 32) (_ bv10 32))))) (store (store .cse13 (bvadd .cse14 c_ULTIMATE.start_main_~a~0.offset) ((_ extract 31 0) .cse15)) (bvadd (_ bv4 32) .cse14 c_ULTIMATE.start_main_~a~0.offset) ((_ extract 63 32) .cse15))))) c_ULTIMATE.start_main_~b~0.base)) (.cse11 (bvmul ((_ extract 31 0) .cse12) (_ bv8 32)))) (concat (select .cse10 (bvadd (_ bv4 32) .cse11 c_ULTIMATE.start_main_~b~0.offset)) (select .cse10 (bvadd .cse11 c_ULTIMATE.start_main_~b~0.offset)))) (let ((.cse18 ((_ sign_extend 32) (_ bv5 32)))) (bvadd (bvmul .cse18 .cse12 .cse12) .cse17 (bvmul .cse18 .cse12))))))) is different from false [2021-08-25 19:06:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:11,371 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-08-25 19:06:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-25 19:06:11,371 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 19:06:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:11,372 INFO L225 Difference]: With dead ends: 74 [2021-08-25 19:06:11,372 INFO L226 Difference]: Without dead ends: 72 [2021-08-25 19:06:11,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 21262.6ms TimeCoverageRelationStatistics Valid=198, Invalid=612, Unknown=6, NotChecked=54, Total=870 [2021-08-25 19:06:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-25 19:06:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 36. [2021-08-25 19:06:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-25 19:06:11,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2021-08-25 19:06:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:11,379 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-25 19:06:11,379 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 19:06:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-25 19:06:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:06:11,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:11,380 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 19:06:11,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-08-25 19:06:11,584 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 19:06:11,585 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:11,586 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-08-25 19:06:11,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:06:11,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722215587] [2021-08-25 19:06:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:06:11,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:06:11,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:06:11,587 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 19:06:11,588 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 19:06:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:06:12,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-25 19:06:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:06:12,066 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 19:06:12,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 19:06:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,215 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-25 19:06:12,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 127 [2021-08-25 19:06:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:12,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:12,624 INFO L354 Elim1Store]: treesize reduction 132, result has 15.9 percent of original size [2021-08-25 19:06:12,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 278 treesize of output 201 [2021-08-25 19:06:13,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:13,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:13,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:13,510 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-08-25 19:06:13,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 371 treesize of output 141 [2021-08-25 19:06:13,562 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 19:06:13,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:06:17,212 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 19:06:17,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:06:17,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722215587] [2021-08-25 19:06:17,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722215587] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:06:17,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:06:17,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-25 19:06:17,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127557650] [2021-08-25 19:06:17,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-25 19:06:17,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:06:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-25 19:06:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:06:17,214 INFO L87 Difference]: Start difference. First operand 36 states and 42 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 19:06:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:48,603 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-08-25 19:06:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-25 19:06:48,607 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 19:06:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:48,609 INFO L225 Difference]: With dead ends: 80 [2021-08-25 19:06:48,609 INFO L226 Difference]: Without dead ends: 78 [2021-08-25 19:06:48,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 21170.3ms TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2021-08-25 19:06:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-25 19:06:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2021-08-25 19:06:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 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 19:06:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-08-25 19:06:48,618 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 20 [2021-08-25 19:06:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:48,618 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-08-25 19:06:48,618 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 19:06:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-08-25 19:06:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:06:48,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:48,619 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:48,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:06:48,828 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 19:06:48,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:48,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:48,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 2 times [2021-08-25 19:06:48,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:06:48,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683674530] [2021-08-25 19:06:48,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:06:48,829 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:06:48,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:06:48,833 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 19:06:48,866 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 19:06:49,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:06:49,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:06:49,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 19:06:49,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:06:49,236 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 19:06:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:49,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:49,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 19:06:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:49,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:49,739 INFO L354 Elim1Store]: treesize reduction 883, result has 10.4 percent of original size [2021-08-25 19:06:49,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 132 treesize of output 141 [2021-08-25 19:06:50,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:50,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:43,560 WARN L207 SmtUtils]: Spent 53.33 s on a formula simplification. DAG size of input: 248 DAG size of output: 104 [2021-08-25 19:07:43,563 INFO L354 Elim1Store]: treesize reduction 1365, result has 19.5 percent of original size [2021-08-25 19:07:43,563 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 417 [2021-08-25 19:11:05,905 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 19:11:05,908 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 19:11:05,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:11:05,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683674530] [2021-08-25 19:11:05,909 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 19:11:05,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1091547390] [2021-08-25 19:11:05,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:11:05,909 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-25 19:11:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-25 19:11:05,910 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-25 19:11:05,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-08-25 19:11:06,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:11:06,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135857715] [2021-08-25 19:11:06,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:11:06,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:11:06,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:11:06,483 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 19:11:06,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 1 [2021-08-25 19:11:06,488 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 19:11:06,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:11:06,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:11:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-25 19:11:06,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:11:06,785 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 19:11:06,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:11:06,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:11:06,785 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-25 19:11:06,785 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:11:06,788 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:11:06,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-25 19:11:06,998 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 19:11:07,189 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,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:11:07,193 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:11:07,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:11:07 BoogieIcfgContainer [2021-08-25 19:11:07,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:11:07,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:11:07,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:11:07,207 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:11:07,207 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:28" (3/4) ... [2021-08-25 19:11:07,209 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:11:07,209 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:11:07,210 INFO L168 Benchmark]: Toolchain (without parser) took 339953.79 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 43.2 MB in the beginning and 59.8 MB in the end (delta: -16.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-08-25 19:11:07,210 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 62.9 MB. Free memory was 45.0 MB in the beginning and 44.9 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:11:07,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.68 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: -2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:11:07,211 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.78 ms. Allocated memory is still 62.9 MB. Free memory was 45.1 MB in the beginning and 43.3 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:11:07,212 INFO L168 Benchmark]: Boogie Preprocessor took 41.63 ms. Allocated memory is still 62.9 MB. Free memory was 43.3 MB in the beginning and 41.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:11:07,212 INFO L168 Benchmark]: RCFGBuilder took 482.98 ms. Allocated memory is still 62.9 MB. Free memory was 41.9 MB in the beginning and 25.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-08-25 19:11:07,212 INFO L168 Benchmark]: TraceAbstraction took 339188.66 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 24.6 MB in the beginning and 60.7 MB in the end (delta: -36.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:11:07,212 INFO L168 Benchmark]: Witness Printer took 2.53 ms. Allocated memory is still 92.3 MB. Free memory was 60.7 MB in the beginning and 59.8 MB in the end (delta: 887.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:11:07,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 62.9 MB. Free memory was 45.0 MB in the beginning and 44.9 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 193.68 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: -2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.78 ms. Allocated memory is still 62.9 MB. Free memory was 45.1 MB in the beginning and 43.3 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.63 ms. Allocated memory is still 62.9 MB. Free memory was 43.3 MB in the beginning and 41.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 482.98 ms. Allocated memory is still 62.9 MB. Free memory was 41.9 MB in the beginning and 25.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 339188.66 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 24.6 MB in the beginning and 60.7 MB in the end (delta: -36.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.53 ms. Allocated memory is still 92.3 MB. Free memory was 60.7 MB in the beginning and 59.8 MB in the end (delta: 887.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 10 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i