./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s1iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/s1iff.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 eec6b2d99ac9a557043cad5fb1ce9cac95211db3 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 19:30:18,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:30:18,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:30:18,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:30:18,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:30:18,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:30:18,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:30:18,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:30:18,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:30:18,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:30:18,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:30:18,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:30:18,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:30:18,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:30:18,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:30:18,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:30:18,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:30:18,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:30:18,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:30:18,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:30:18,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:30:18,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:30:18,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:30:18,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:30:18,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:30:18,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:30:18,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:30:18,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:30:18,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:30:18,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:30:18,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:30:18,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:30:18,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:30:18,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:30:18,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:30:18,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:30:18,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:30:18,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:30:18,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:30:18,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:30:18,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:30:18,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:30:18,232 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:30:18,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:30:18,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:30:18,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:30:18,237 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:30:18,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:30:18,237 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:30:18,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:30:18,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:30:18,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:30:18,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:30:18,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:30:18,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:30:18,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:30:18,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:30:18,240 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:30:18,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:30:18,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:30:18,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:30:18,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:30:18,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:30:18,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:30:18,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:30:18,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:30:18,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:30:18,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:30:18,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:30:18,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:30:18,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:30:18,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eec6b2d99ac9a557043cad5fb1ce9cac95211db3 [2020-10-25 19:30:18,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:30:18,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:30:18,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:30:18,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:30:18,781 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:30:18,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s1iff.c [2020-10-25 19:30:18,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb54fe5e1/80f452408a714d388b61e44375dfac74/FLAG720b41d7a [2020-10-25 19:30:19,636 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:30:19,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s1iff.c [2020-10-25 19:30:19,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb54fe5e1/80f452408a714d388b61e44375dfac74/FLAG720b41d7a [2020-10-25 19:30:20,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb54fe5e1/80f452408a714d388b61e44375dfac74 [2020-10-25 19:30:20,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:30:20,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:30:20,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:30:20,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:30:20,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:30:20,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8f7b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20, skipping insertion in model container [2020-10-25 19:30:20,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:30:20,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:30:20,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:30:20,273 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:30:20,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:30:20,320 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:30:20,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20 WrapperNode [2020-10-25 19:30:20,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:30:20,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:30:20,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:30:20,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:30:20,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:30:20,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:30:20,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:30:20,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:30:20,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... [2020-10-25 19:30:20,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:30:20,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:30:20,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:30:20,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:30:20,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:30:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:30:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:30:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:30:20,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 19:30:20,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:30:20,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:30:20,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:30:20,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 19:30:20,964 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:30:20,964 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-25 19:30:20,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:30:20 BoogieIcfgContainer [2020-10-25 19:30:20,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:30:20,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:30:20,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:30:20,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:30:20,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:30:20" (1/3) ... [2020-10-25 19:30:20,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa8a57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:30:20, skipping insertion in model container [2020-10-25 19:30:20,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:30:20" (2/3) ... [2020-10-25 19:30:20,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa8a57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:30:20, skipping insertion in model container [2020-10-25 19:30:20,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:30:20" (3/3) ... [2020-10-25 19:30:20,980 INFO L111 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-10-25 19:30:20,995 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:30:21,002 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:30:21,020 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:30:21,068 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:30:21,069 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:30:21,069 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:30:21,069 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:30:21,070 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:30:21,070 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:30:21,070 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:30:21,070 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:30:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-25 19:30:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 19:30:21,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:21,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:30:21,097 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-10-25 19:30:21,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:21,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866487330] [2020-10-25 19:30:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:30:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:21,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866487330] [2020-10-25 19:30:21,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:30:21,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:30:21,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451161980] [2020-10-25 19:30:21,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:30:21,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:30:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:30:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:30:21,317 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-25 19:30:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:30:21,356 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-10-25 19:30:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:30:21,358 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-25 19:30:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:30:21,369 INFO L225 Difference]: With dead ends: 35 [2020-10-25 19:30:21,369 INFO L226 Difference]: Without dead ends: 15 [2020-10-25 19:30:21,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:30:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-25 19:30:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-25 19:30:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-25 19:30:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-25 19:30:21,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-10-25 19:30:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:30:21,413 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-25 19:30:21,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:30:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-25 19:30:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 19:30:21,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:21,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:30:21,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:30:21,416 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-10-25 19:30:21,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:21,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093726780] [2020-10-25 19:30:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:30:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:21,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093726780] [2020-10-25 19:30:21,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:30:21,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:30:21,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320126999] [2020-10-25 19:30:21,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:30:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:30:21,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:30:21,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:30:21,568 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-25 19:30:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:30:21,663 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-25 19:30:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:30:21,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-25 19:30:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:30:21,665 INFO L225 Difference]: With dead ends: 28 [2020-10-25 19:30:21,666 INFO L226 Difference]: Without dead ends: 20 [2020-10-25 19:30:21,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:30:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-25 19:30:21,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-25 19:30:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-25 19:30:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-25 19:30:21,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-10-25 19:30:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:30:21,672 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-25 19:30:21,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:30:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-25 19:30:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 19:30:21,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:21,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:30:21,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 19:30:21,674 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-10-25 19:30:21,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:21,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573555610] [2020-10-25 19:30:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:30:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:22,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573555610] [2020-10-25 19:30:22,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746518416] [2020-10-25 19:30:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:30:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:30:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-25 19:30:22,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:30:22,355 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-25 19:30:22,355 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 19:30:22,363 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-25 19:30:22,363 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-25 19:30:22,390 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 19:30:22,391 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-10-25 19:30:22,391 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2020-10-25 19:30:22,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 19:30:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-25 19:30:22,460 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-25 19:30:22,462 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 19:30:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-25 19:30:22,474 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-25 19:30:22,476 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-25 19:30:22,631 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-10-25 19:30:22,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 19:30:22,633 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-10-25 19:30:22,633 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:69, output treesize:61 [2020-10-25 19:30:22,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 19:30:22,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 19:30:22,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-25 19:30:22,999 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 19:30:23,000 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-10-25 19:30:23,001 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 19:30:23,020 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 19:30:23,032 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-25 19:30:23,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:48 [2020-10-25 19:30:23,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 19:30:23,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 19:30:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:23,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 19:30:23,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-10-25 19:30:23,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244270144] [2020-10-25 19:30:23,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-25 19:30:23,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:30:23,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-25 19:30:23,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-25 19:30:23,249 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 17 states. [2020-10-25 19:30:23,411 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-10-25 19:30:23,556 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-10-25 19:30:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:30:24,148 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-25 19:30:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 19:30:24,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-10-25 19:30:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:30:24,151 INFO L225 Difference]: With dead ends: 35 [2020-10-25 19:30:24,152 INFO L226 Difference]: Without dead ends: 26 [2020-10-25 19:30:24,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-25 19:30:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-25 19:30:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-25 19:30:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-25 19:30:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-25 19:30:24,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-25 19:30:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:30:24,161 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-25 19:30:24,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-25 19:30:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-25 19:30:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:30:24,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:24,162 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:30:24,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 19:30:24,376 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:24,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2020-10-25 19:30:24,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:24,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715177732] [2020-10-25 19:30:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:30:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:24,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715177732] [2020-10-25 19:30:24,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838807477] [2020-10-25 19:30:24,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:30:24,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:30:24,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:30:24,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 19:30:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:30:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:24,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 19:30:24,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-25 19:30:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220366347] [2020-10-25 19:30:24,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 19:30:24,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:30:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 19:30:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-25 19:30:24,603 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-10-25 19:30:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:30:24,898 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-25 19:30:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 19:30:24,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-25 19:30:24,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:30:24,900 INFO L225 Difference]: With dead ends: 33 [2020-10-25 19:30:24,900 INFO L226 Difference]: Without dead ends: 29 [2020-10-25 19:30:24,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-25 19:30:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-25 19:30:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-25 19:30:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-25 19:30:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-25 19:30:24,908 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-10-25 19:30:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:30:24,909 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-25 19:30:24,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 19:30:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-25 19:30:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:30:24,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:24,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:30:25,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:30:25,125 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2020-10-25 19:30:25,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:25,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402504502] [2020-10-25 19:30:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:30:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:25,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402504502] [2020-10-25 19:30:25,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892693484] [2020-10-25 19:30:25,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:30:25,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-25 19:30:25,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:30:25,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 19:30:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:30:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:30:25,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 19:30:25,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-25 19:30:25,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658396689] [2020-10-25 19:30:25,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 19:30:25,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:30:25,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 19:30:25,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-25 19:30:25,406 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2020-10-25 19:30:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:30:25,542 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-25 19:30:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 19:30:25,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-25 19:30:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:30:25,544 INFO L225 Difference]: With dead ends: 37 [2020-10-25 19:30:25,544 INFO L226 Difference]: Without dead ends: 25 [2020-10-25 19:30:25,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-25 19:30:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-25 19:30:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-25 19:30:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-25 19:30:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-25 19:30:25,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-25 19:30:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:30:25,556 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-25 19:30:25,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 19:30:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-25 19:30:25,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-25 19:30:25,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:30:25,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:30:25,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:30:25,773 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:30:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:30:25,775 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2020-10-25 19:30:25,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:30:25,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238326022] [2020-10-25 19:30:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:30:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:30:25,828 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:30:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:30:25,879 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:30:25,914 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:30:25,914 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:30:25,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-25 19:30:25,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:30:25 BoogieIcfgContainer [2020-10-25 19:30:25,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:30:25,972 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:30:25,972 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:30:25,972 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:30:25,972 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:30:20" (3/4) ... [2020-10-25 19:30:25,974 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:30:26,034 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:30:26,035 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:30:26,036 INFO L168 Benchmark]: Toolchain (without parser) took 6022.07 ms. Allocated memory was 50.3 MB in the beginning and 88.1 MB in the end (delta: 37.7 MB). Free memory was 26.9 MB in the beginning and 57.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:26,037 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 50.3 MB. Free memory was 30.5 MB in the beginning and 30.4 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:30:26,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.39 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.2 MB in the beginning and 38.2 MB in the end (delta: -11.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:26,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.16 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 36.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:26,040 INFO L168 Benchmark]: Boogie Preprocessor took 64.23 ms. Allocated memory is still 60.8 MB. Free memory was 36.6 MB in the beginning and 35.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:26,040 INFO L168 Benchmark]: RCFGBuilder took 513.41 ms. Allocated memory is still 60.8 MB. Free memory was 35.3 MB in the beginning and 38.3 MB in the end (delta: -3.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:26,041 INFO L168 Benchmark]: TraceAbstraction took 5001.84 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 37.7 MB in the beginning and 60.0 MB in the end (delta: -22.3 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:26,042 INFO L168 Benchmark]: Witness Printer took 63.16 ms. Allocated memory is still 88.1 MB. Free memory was 60.0 MB in the beginning and 57.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:30:26,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 50.3 MB. Free memory was 30.5 MB in the beginning and 30.4 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.39 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.2 MB in the beginning and 38.2 MB in the end (delta: -11.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.16 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 36.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.23 ms. Allocated memory is still 60.8 MB. Free memory was 36.6 MB in the beginning and 35.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 513.41 ms. Allocated memory is still 60.8 MB. Free memory was 35.3 MB in the beginning and 38.3 MB in the end (delta: -3.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5001.84 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 37.7 MB in the beginning and 60.0 MB in the end (delta: -22.3 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Witness Printer took 63.16 ms. Allocated memory is still 88.1 MB. Free memory was 60.0 MB in the beginning and 57.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i