./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/nsqmf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/nsqmf.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 84af1a44340d97934a061498051a9028cf73e371 ................................................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-19 22:15:28,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:15:28,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:15:28,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:15:28,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:15:28,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:15:28,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:15:28,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:15:28,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:15:28,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:15:28,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:15:28,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:15:28,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:15:28,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:15:28,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:15:28,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:15:28,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:15:28,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:15:28,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:15:28,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:15:28,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:15:28,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:15:28,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:15:28,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:15:28,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:15:28,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:15:28,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:15:28,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:15:28,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:15:28,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:15:28,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:15:28,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:15:28,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:15:28,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:15:28,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:15:28,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:15:28,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:15:28,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:15:28,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:15:28,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:15:28,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:15:28,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:15:28,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:15:28,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:15:28,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:15:28,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:15:28,730 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:15:28,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:15:28,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:15:28,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:15:28,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:15:28,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:15:28,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:15:28,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:15:28,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:15:28,734 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:15:28,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:15:28,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:15:28,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:15:28,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:15:28,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:15:28,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:15:28,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:15:28,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:15:28,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:15:28,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:15:28,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:15:28,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:15:28,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:15:28,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:15:28,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:15:28,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 84af1a44340d97934a061498051a9028cf73e371 [2020-10-19 22:15:28,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:15:28,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:15:28,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:15:28,999 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:15:28,999 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:15:29,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqmf.c [2020-10-19 22:15:29,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7f2daac/71b62c91104e426ba7dbcda3e6b1c2f4/FLAG4400a3b04 [2020-10-19 22:15:29,526 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:15:29,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqmf.c [2020-10-19 22:15:29,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7f2daac/71b62c91104e426ba7dbcda3e6b1c2f4/FLAG4400a3b04 [2020-10-19 22:15:29,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7f2daac/71b62c91104e426ba7dbcda3e6b1c2f4 [2020-10-19 22:15:29,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:15:29,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:15:29,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:15:29,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:15:29,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:15:29,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:15:29" (1/1) ... [2020-10-19 22:15:29,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fadeb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:29, skipping insertion in model container [2020-10-19 22:15:29,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:15:29" (1/1) ... [2020-10-19 22:15:29,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:15:29,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:15:30,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:15:30,367 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:15:30,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:15:30,433 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:15:30,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30 WrapperNode [2020-10-19 22:15:30,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:15:30,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:15:30,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:15:30,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:15:30,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:15:30,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:15:30,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:15:30,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:15:30,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (1/1) ... [2020-10-19 22:15:30,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:15:30,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:15:30,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:15:30,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:15:30,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (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 [2020-10-19 22:15:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:15:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:15:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:15:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:15:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:15:30,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:15:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:15:30,903 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:15:30,904 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-19 22:15:30,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:30 BoogieIcfgContainer [2020-10-19 22:15:30,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:15:30,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:15:30,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:15:30,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:15:30,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:15:29" (1/3) ... [2020-10-19 22:15:30,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f47c054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:15:30, skipping insertion in model container [2020-10-19 22:15:30,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:30" (2/3) ... [2020-10-19 22:15:30,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f47c054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:15:30, skipping insertion in model container [2020-10-19 22:15:30,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:30" (3/3) ... [2020-10-19 22:15:30,917 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqmf.c [2020-10-19 22:15:30,935 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:15:30,945 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:15:30,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:15:31,006 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:15:31,006 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:15:31,006 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:15:31,007 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:15:31,007 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:15:31,007 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:15:31,008 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:15:31,008 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:15:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-19 22:15:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:15:31,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:15:31,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:15:31,035 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:15:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:15:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2020-10-19 22:15:31,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:15:31,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290195291] [2020-10-19 22:15:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:15:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:15:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:15:31,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290195291] [2020-10-19 22:15:31,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:15:31,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:15:31,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57897903] [2020-10-19 22:15:31,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:15:31,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:15:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:15:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:15:31,258 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-10-19 22:15:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:15:31,277 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-10-19 22:15:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:15:31,279 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-19 22:15:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:15:31,289 INFO L225 Difference]: With dead ends: 39 [2020-10-19 22:15:31,290 INFO L226 Difference]: Without dead ends: 17 [2020-10-19 22:15:31,293 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 [2020-10-19 22:15:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-19 22:15:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-19 22:15:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 22:15:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-19 22:15:31,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-10-19 22:15:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:15:31,327 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-19 22:15:31,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:15:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-19 22:15:31,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:15:31,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:15:31,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:15:31,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:15:31,329 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:15:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:15:31,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2020-10-19 22:15:31,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:15:31,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806231661] [2020-10-19 22:15:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:15:31,370 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:15:31,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855113553] [2020-10-19 22:15:31,371 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 [2020-10-19 22:15:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:15:31,464 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:15:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:15:31,499 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:15:31,546 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:15:31,546 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:15:31,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-19 22:15:31,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:15:31 BoogieIcfgContainer [2020-10-19 22:15:31,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:15:31,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:15:31,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:15:31,805 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:15:31,805 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:30" (3/4) ... [2020-10-19 22:15:31,808 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:15:31,867 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:15:31,867 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:15:31,870 INFO L168 Benchmark]: Toolchain (without parser) took 1929.12 ms. Allocated memory was 35.1 MB in the beginning and 50.9 MB in the end (delta: 15.7 MB). Free memory was 7.0 MB in the beginning and 25.0 MB in the end (delta: -18.1 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:15:31,871 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 35.1 MB. Free memory was 12.4 MB in the beginning and 12.4 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. [2020-10-19 22:15:31,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 488.60 ms. Allocated memory was 35.1 MB in the beginning and 45.6 MB in the end (delta: 10.5 MB). Free memory was 6.1 MB in the beginning and 27.1 MB in the end (delta: -21.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:31,873 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.04 ms. Allocated memory is still 45.6 MB. Free memory was 27.0 MB in the beginning and 25.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:31,874 INFO L168 Benchmark]: Boogie Preprocessor took 51.87 ms. Allocated memory is still 45.6 MB. Free memory was 25.2 MB in the beginning and 23.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:31,875 INFO L168 Benchmark]: RCFGBuilder took 342.28 ms. Allocated memory was 45.6 MB in the beginning and 47.7 MB in the end (delta: 2.1 MB). Free memory was 23.7 MB in the beginning and 21.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:31,876 INFO L168 Benchmark]: TraceAbstraction took 895.38 ms. Allocated memory was 47.7 MB in the beginning and 50.9 MB in the end (delta: 3.1 MB). Free memory was 21.5 MB in the beginning and 28.0 MB in the end (delta: -6.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:31,877 INFO L168 Benchmark]: Witness Printer took 63.31 ms. Allocated memory is still 50.9 MB. Free memory was 27.6 MB in the beginning and 25.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:31,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 35.1 MB. Free memory was 12.4 MB in the beginning and 12.4 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 488.60 ms. Allocated memory was 35.1 MB in the beginning and 45.6 MB in the end (delta: 10.5 MB). Free memory was 6.1 MB in the beginning and 27.1 MB in the end (delta: -21.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 75.04 ms. Allocated memory is still 45.6 MB. Free memory was 27.0 MB in the beginning and 25.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 51.87 ms. Allocated memory is still 45.6 MB. Free memory was 25.2 MB in the beginning and 23.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 342.28 ms. Allocated memory was 45.6 MB in the beginning and 47.7 MB in the end (delta: 2.1 MB). Free memory was 23.7 MB in the beginning and 21.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 895.38 ms. Allocated memory was 47.7 MB in the beginning and 50.9 MB in the end (delta: 3.1 MB). Free memory was 21.5 MB in the beginning and 28.0 MB in the end (delta: -6.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 14.3 GB. * Witness Printer took 63.31 ms. Allocated memory is still 50.9 MB. Free memory was 27.6 MB in the beginning and 25.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 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] = 1 [L32] a[0] = 1 [L34] i=1 VAL [N=1] [L34] COND FALSE !(i