./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2iff.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/s2iff.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 a22ecd7dbca86ce676366b458aa720e60c3fd1ca .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.1-dev-20ed64e [2021-08-25 19:34:51,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:34:51,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:34:51,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:34:51,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:34:51,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:34:51,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:34:51,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:34:51,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:34:51,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:34:51,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:34:51,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:34:51,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:34:51,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:34:51,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:34:51,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:34:51,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:34:51,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:34:51,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:34:51,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:34:51,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:34:51,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:34:51,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:34:51,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:34:51,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:34:51,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:34:51,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:34:51,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:34:51,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:34:51,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:34:51,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:34:51,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:34:51,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:34:51,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:34:51,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:34:51,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:34:51,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:34:51,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:34:51,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:34:51,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:34:51,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:34:51,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:34:51,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:34:51,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:34:51,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:34:51,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:34:51,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:34:51,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:34:51,200 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:34:51,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:34:51,200 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:34:51,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:34:51,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:34:51,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:34:51,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:34:51,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:34:51,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:34:51,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:34:51,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:34:51,202 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:34:51,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:34:51,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:34:51,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:34:51,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:34:51,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:34:51,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:34:51,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:34:51,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:34:51,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:34:51,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:34:51,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:34:51,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:34:51,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a22ecd7dbca86ce676366b458aa720e60c3fd1ca [2021-08-25 19:34:51,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:34:51,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:34:51,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:34:51,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:34:51,478 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:34:51,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2iff.c [2021-08-25 19:34:51,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b3a8621/70b64d9ae4ae4de58a20a0d73eefbaf2/FLAGb90326b32 [2021-08-25 19:34:51,900 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:34:51,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2iff.c [2021-08-25 19:34:51,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b3a8621/70b64d9ae4ae4de58a20a0d73eefbaf2/FLAGb90326b32 [2021-08-25 19:34:51,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b3a8621/70b64d9ae4ae4de58a20a0d73eefbaf2 [2021-08-25 19:34:51,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:34:51,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:34:51,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:34:51,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:34:51,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:34:51,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:34:51" (1/1) ... [2021-08-25 19:34:51,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcf24fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:51, skipping insertion in model container [2021-08-25 19:34:51,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:34:51" (1/1) ... [2021-08-25 19:34:51,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:34:51,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:34:52,048 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/s2iff.c[588,601] [2021-08-25 19:34:52,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:34:52,079 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:34:52,096 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/s2iff.c[588,601] [2021-08-25 19:34:52,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:34:52,118 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:34:52,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52 WrapperNode [2021-08-25 19:34:52,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:34:52,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:34:52,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:34:52,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:34:52,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:34:52,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:34:52,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:34:52,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:34:52,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:34:52,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:34:52,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:34:52,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:34:52,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (1/1) ... [2021-08-25 19:34:52,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:34:52,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:34:52,213 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 19:34:52,231 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 19:34:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:34:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:34:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:34:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:34:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:34:52,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:34:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:34:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 19:34:52,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:34:52,510 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-25 19:34:52,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:34:52 BoogieIcfgContainer [2021-08-25 19:34:52,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:34:52,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:34:52,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:34:52,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:34:52,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:34:51" (1/3) ... [2021-08-25 19:34:52,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1346ceb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:34:52, skipping insertion in model container [2021-08-25 19:34:52,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:34:52" (2/3) ... [2021-08-25 19:34:52,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1346ceb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:34:52, skipping insertion in model container [2021-08-25 19:34:52,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:34:52" (3/3) ... [2021-08-25 19:34:52,517 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2021-08-25 19:34:52,520 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:34:52,520 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:34:52,567 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:34:52,573 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 19:34:52,573 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:34:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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 19:34:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-25 19:34:52,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:34:52,589 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:34:52,589 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:34:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:34:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-08-25 19:34:52,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:34:52,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032700922] [2021-08-25 19:34:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:34:52,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:34:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:34:52,720 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 19:34:52,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:34:52,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032700922] [2021-08-25 19:34:52,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032700922] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:34:52,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:34:52,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:34:52,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522507309] [2021-08-25 19:34:52,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:34:52,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:34:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:34:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:34:52,738 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:34:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:34:52,747 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-08-25 19:34:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:34:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-25 19:34:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:34:52,754 INFO L225 Difference]: With dead ends: 34 [2021-08-25 19:34:52,754 INFO L226 Difference]: Without dead ends: 15 [2021-08-25 19:34:52,756 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 19:34:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-25 19:34:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-25 19:34:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 19:34:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-08-25 19:34:52,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-08-25 19:34:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:34:52,776 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-08-25 19:34:52,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:34:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-08-25 19:34:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-25 19:34:52,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:34:52,776 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:34:52,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:34:52,777 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:34:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:34:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-08-25 19:34:52,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:34:52,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230903216] [2021-08-25 19:34:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:34:52,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:34:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:34:52,849 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 19:34:52,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:34:52,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230903216] [2021-08-25 19:34:52,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230903216] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:34:52,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:34:52,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 19:34:52,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113973761] [2021-08-25 19:34:52,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 19:34:52,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:34:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 19:34:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:34:52,851 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:34:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:34:52,916 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-08-25 19:34:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 19:34:52,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-25 19:34:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:34:52,921 INFO L225 Difference]: With dead ends: 28 [2021-08-25 19:34:52,921 INFO L226 Difference]: Without dead ends: 20 [2021-08-25 19:34:52,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:34:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-25 19:34:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-08-25 19:34:52,924 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 19:34:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:34:52,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-08-25 19:34:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:34:52,924 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:34:52,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:34:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:34:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:34:52,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:34:52,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:34:52,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 19:34:52,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:34:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:34:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-08-25 19:34:52,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:34:52,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628188010] [2021-08-25 19:34:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:34:52,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:34:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:34:53,231 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 19:34:53,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:34:53,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628188010] [2021-08-25 19:34:53,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628188010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:34:53,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060849872] [2021-08-25 19:34:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:34:53,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:34:53,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:34:53,233 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 19:34:53,234 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 19:34:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:34:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-25 19:34:53,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:34:53,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-25 19:34:53,374 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 19:34:53,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-25 19:34:53,794 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-08-25 19:34:53,795 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 5 case distinctions, treesize of input 67 treesize of output 53 [2021-08-25 19:34:54,138 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-25 19:34:54,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 50 [2021-08-25 19:34:54,167 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 19:34:54,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060849872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:34:54,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:34:54,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-25 19:34:54,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652217910] [2021-08-25 19:34:54,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-25 19:34:54,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:34:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-25 19:34:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-25 19:34:54,169 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 19:34:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:34:54,421 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-08-25 19:34:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 19:34:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 19:34:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:34:54,423 INFO L225 Difference]: With dead ends: 35 [2021-08-25 19:34:54,423 INFO L226 Difference]: Without dead ends: 26 [2021-08-25 19:34:54,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-25 19:34:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-25 19:34:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-08-25 19:34:54,427 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 19:34:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:34:54,428 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-08-25 19:34:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:34:54,428 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:34:54,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 19:34:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:34:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:34:54,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:34:54,429 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:34:54,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:34:54,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:34:54,644 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:34:54,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:34:54,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-08-25 19:34:54,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:34:54,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614675000] [2021-08-25 19:34:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:34:54,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:34:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:34:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:34:54,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:34:54,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614675000] [2021-08-25 19:34:54,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614675000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:34:54,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073857220] [2021-08-25 19:34:54,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:34:54,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:34:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:34:54,715 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 19:34:54,715 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 19:34:54,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:34:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:34:54,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:34:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:34:54,909 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 19:34:54,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073857220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:34:54,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:34:54,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-25 19:34:54,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546485606] [2021-08-25 19:34:54,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:34:54,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:34:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:34:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:34:54,911 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 19:34:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:34:54,999 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-08-25 19:34:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:34:54,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) Word has length 18 [2021-08-25 19:34:55,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:34:55,000 INFO L225 Difference]: With dead ends: 33 [2021-08-25 19:34:55,000 INFO L226 Difference]: Without dead ends: 29 [2021-08-25 19:34:55,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:34:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-25 19:34:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-08-25 19:34:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 19:34:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-08-25 19:34:55,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-08-25 19:34:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:34:55,004 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-08-25 19:34:55,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 19:34:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-08-25 19:34:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 19:34:55,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:34:55,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:34:55,023 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 19:34:55,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-25 19:34:55,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:34:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:34:55,223 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-08-25 19:34:55,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:34:55,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202402446] [2021-08-25 19:34:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:34:55,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:34:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:34:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:34:55,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:34:55,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202402446] [2021-08-25 19:34:55,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202402446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:34:55,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085642841] [2021-08-25 19:34:55,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:34:55,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:34:55,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:34:55,294 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 19:34:55,295 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 19:34:55,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:34:55,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:34:55,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:34:55,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:34:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:34:55,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085642841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:34:55,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:34:55,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-25 19:34:55,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137696568] [2021-08-25 19:34:55,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:34:55,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:34:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:34:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:34:55,462 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 19:34:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:34:55,527 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-08-25 19:34:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:34:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 19 [2021-08-25 19:34:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:34:55,528 INFO L225 Difference]: With dead ends: 37 [2021-08-25 19:34:55,528 INFO L226 Difference]: Without dead ends: 25 [2021-08-25 19:34:55,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:34:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-25 19:34:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-08-25 19:34:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:34:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-08-25 19:34:55,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2021-08-25 19:34:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:34:55,531 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-08-25 19:34:55,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 19:34:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-08-25 19:34:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 19:34:55,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:34:55,532 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:34:55,551 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 19:34:55,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:34:55,748 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:34:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:34:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-08-25 19:34:55,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:34:55,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716787972] [2021-08-25 19:34:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:34:55,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:34:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 19:34:55,769 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 19:34:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 19:34:55,817 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 19:34:55,817 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 19:34:55,817 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:34:55,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 19:34:55,822 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:34:55,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:34:55 BoogieIcfgContainer [2021-08-25 19:34:55,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:34:55,866 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:34:55,866 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:34:55,866 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:34:55,866 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:34:52" (3/4) ... [2021-08-25 19:34:55,867 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 19:34:55,903 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 19:34:55,903 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:34:55,904 INFO L168 Benchmark]: Toolchain (without parser) took 3980.63 ms. Allocated memory was 65.0 MB in the beginning and 130.0 MB in the end (delta: 65.0 MB). Free memory was 46.1 MB in the beginning and 108.9 MB in the end (delta: -62.7 MB). Peak memory consumption was 66.8 MB. Max. memory is 16.1 GB. [2021-08-25 19:34:55,904 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 65.0 MB. Free memory is still 47.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:34:55,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.06 ms. Allocated memory is still 65.0 MB. Free memory was 46.0 MB in the beginning and 48.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:34:55,905 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.32 ms. Allocated memory is still 65.0 MB. Free memory was 48.2 MB in the beginning and 46.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:34:55,905 INFO L168 Benchmark]: Boogie Preprocessor took 34.46 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 45.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:34:55,905 INFO L168 Benchmark]: RCFGBuilder took 318.19 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 45.5 MB in the beginning and 70.7 MB in the end (delta: -25.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-25 19:34:55,906 INFO L168 Benchmark]: TraceAbstraction took 3352.74 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 70.4 MB in the beginning and 44.6 MB in the end (delta: 25.7 MB). Peak memory consumption was 66.7 MB. Max. memory is 16.1 GB. [2021-08-25 19:34:55,906 INFO L168 Benchmark]: Witness Printer took 37.43 ms. Allocated memory is still 130.0 MB. Free memory was 44.6 MB in the beginning and 108.9 MB in the end (delta: -64.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:34:55,908 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 65.0 MB. Free memory is still 47.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 196.06 ms. Allocated memory is still 65.0 MB. Free memory was 46.0 MB in the beginning and 48.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.32 ms. Allocated memory is still 65.0 MB. Free memory was 48.2 MB in the beginning and 46.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.46 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 45.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 318.19 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 45.5 MB in the beginning and 70.7 MB in the end (delta: -25.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3352.74 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 70.4 MB in the beginning and 44.6 MB in the end (delta: 25.7 MB). Peak memory consumption was 66.7 MB. Max. memory is 16.1 GB. * Witness Printer took 37.43 ms. Allocated memory is still 130.0 MB. Free memory was 44.6 MB in the beginning and 108.9 MB in the end (delta: -64.2 MB). Peak memory consumption was 2.1 MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_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