./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/sqmf.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/sqmf.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 fecc72cfd370488916dec9e886b2adb7be87af7f ........................................................................................................................................................................................................................................................................................................ 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 19:33:05,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:33:05,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:33:05,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:33:05,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:33:05,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:33:05,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:33:05,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:33:05,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:33:05,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:33:05,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:33:05,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:33:05,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:33:05,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:33:05,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:33:05,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:33:05,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:33:05,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:33:05,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:33:05,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:33:05,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:33:05,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:33:05,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:33:05,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:33:05,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:33:05,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:33:05,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:33:05,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:33:05,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:33:05,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:33:05,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:33:05,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:33:05,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:33:05,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:33:05,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:33:05,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:33:05,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:33:05,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:33:05,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:33:05,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:33:05,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:33:05,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:33:05,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:33:05,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:33:05,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:33:05,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:33:05,723 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:33:05,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:33:05,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:33:05,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:33:05,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:33:05,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:33:05,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:33:05,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:33:05,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:33:05,728 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:33:05,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:33:05,729 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:33:05,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:33:05,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:33:05,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:33:05,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:33:05,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:33:05,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:33:05,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:33:05,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:33:05,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:33:05,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:33:05,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:33:05,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:33:05,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:33:05,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fecc72cfd370488916dec9e886b2adb7be87af7f [2020-10-25 19:33:06,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:33:06,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:33:06,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:33:06,188 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:33:06,189 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:33:06,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sqmf.c [2020-10-25 19:33:06,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/409809ec2/f3b0a217a66a46488f2f3a7ecd16ab2d/FLAG0bbedfd71 [2020-10-25 19:33:07,036 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:33:07,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqmf.c [2020-10-25 19:33:07,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/409809ec2/f3b0a217a66a46488f2f3a7ecd16ab2d/FLAG0bbedfd71 [2020-10-25 19:33:07,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/409809ec2/f3b0a217a66a46488f2f3a7ecd16ab2d [2020-10-25 19:33:07,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:33:07,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:33:07,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:33:07,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:33:07,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:33:07,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@116a51dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07, skipping insertion in model container [2020-10-25 19:33:07,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:33:07,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:33:07,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:33:07,635 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:33:07,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:33:07,684 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:33:07,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07 WrapperNode [2020-10-25 19:33:07,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:33:07,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:33:07,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:33:07,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:33:07,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:33:07,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:33:07,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:33:07,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:33:07,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (1/1) ... [2020-10-25 19:33:07,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:33:07,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:33:07,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:33:07,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:33:07,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (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 19:33:07,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:33:07,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:33:07,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:33:07,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 19:33:07,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:33:07,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:33:07,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:33:08,191 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:33:08,192 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-25 19:33:08,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:33:08 BoogieIcfgContainer [2020-10-25 19:33:08,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:33:08,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:33:08,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:33:08,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:33:08,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:33:07" (1/3) ... [2020-10-25 19:33:08,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b57f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:33:08, skipping insertion in model container [2020-10-25 19:33:08,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:33:07" (2/3) ... [2020-10-25 19:33:08,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b57f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:33:08, skipping insertion in model container [2020-10-25 19:33:08,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:33:08" (3/3) ... [2020-10-25 19:33:08,208 INFO L111 eAbstractionObserver]: Analyzing ICFG sqmf.c [2020-10-25 19:33:08,230 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:33:08,242 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:33:08,279 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:33:08,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:33:08,343 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:33:08,344 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:33:08,345 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:33:08,345 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:33:08,345 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:33:08,345 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:33:08,346 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:33:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-25 19:33:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 19:33:08,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:33:08,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:33:08,383 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:33:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:33:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2020-10-25 19:33:08,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:33:08,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858319337] [2020-10-25 19:33:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:33:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:33:08,667 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 19:33:08,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858319337] [2020-10-25 19:33:08,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:33:08,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:33:08,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831437556] [2020-10-25 19:33:08,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:33:08,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:33:08,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:33:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:33:08,704 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-10-25 19:33:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:33:08,728 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-10-25 19:33:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:33:08,731 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-25 19:33:08,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:33:08,741 INFO L225 Difference]: With dead ends: 39 [2020-10-25 19:33:08,742 INFO L226 Difference]: Without dead ends: 17 [2020-10-25 19:33:08,746 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 19:33:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-25 19:33:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-25 19:33:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-25 19:33:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-25 19:33:08,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-10-25 19:33:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:33:08,807 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-25 19:33:08,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:33:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-25 19:33:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 19:33:08,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:33:08,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:33:08,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:33:08,810 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:33:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:33:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2020-10-25 19:33:08,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:33:08,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703392065] [2020-10-25 19:33:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:33:08,875 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:33:08,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703855504] [2020-10-25 19:33:08,877 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 19:33:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:33:08,996 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:33:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:33:09,018 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:33:09,048 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:33:09,048 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:33:09,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 19:33:09,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:33:09 BoogieIcfgContainer [2020-10-25 19:33:09,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:33:09,315 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:33:09,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:33:09,316 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:33:09,316 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:33:08" (3/4) ... [2020-10-25 19:33:09,319 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:33:09,402 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:33:09,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:33:09,405 INFO L168 Benchmark]: Toolchain (without parser) took 2048.43 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 23.4 MB in the beginning and 26.7 MB in the end (delta: -3.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:33:09,406 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 46.1 MB. Free memory was 32.6 MB in the beginning and 32.6 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:33:09,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.88 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 24.0 MB in the end (delta: -1.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:33:09,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.04 ms. Allocated memory is still 46.1 MB. Free memory was 24.0 MB in the beginning and 22.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:33:09,408 INFO L168 Benchmark]: Boogie Preprocessor took 31.29 ms. Allocated memory is still 46.1 MB. Free memory was 22.4 MB in the beginning and 21.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:33:09,409 INFO L168 Benchmark]: RCFGBuilder took 393.26 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.0 MB in the beginning and 28.5 MB in the end (delta: -7.5 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-10-25 19:33:09,410 INFO L168 Benchmark]: TraceAbstraction took 1116.42 ms. Allocated memory is still 56.6 MB. Free memory was 28.1 MB in the beginning and 29.1 MB in the end (delta: -991.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:33:09,411 INFO L168 Benchmark]: Witness Printer took 87.37 ms. Allocated memory is still 56.6 MB. Free memory was 29.1 MB in the beginning and 26.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:33:09,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 46.1 MB. Free memory was 32.6 MB in the beginning and 32.6 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.88 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 24.0 MB in the end (delta: -1.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.04 ms. Allocated memory is still 46.1 MB. Free memory was 24.0 MB in the beginning and 22.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.29 ms. Allocated memory is still 46.1 MB. Free memory was 22.4 MB in the beginning and 21.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 393.26 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.0 MB in the beginning and 28.5 MB in the end (delta: -7.5 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1116.42 ms. Allocated memory is still 56.6 MB. Free memory was 28.1 MB in the beginning and 29.1 MB in the end (delta: -991.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 87.37 ms. Allocated memory is still 56.6 MB. Free memory was 29.1 MB in the beginning and 26.7 MB in the end (delta: 2.4 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=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] b[0] = 0 [L32] a[0] = 0 [L34] i=1 VAL [N=1] [L34] COND FALSE !(i