./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/modsf.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/modsf.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 85b220978bb74f9e1328fc34d0757a27ef5e1bc9 ........................................................................................................................................................................................................................................................................................................................................................................ 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 22:14:05,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:14:05,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:14:06,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:14:06,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:14:06,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:14:06,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:14:06,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:14:06,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:14:06,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:14:06,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:14:06,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:14:06,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:14:06,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:14:06,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:14:06,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:14:06,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:14:06,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:14:06,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:14:06,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:14:06,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:14:06,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:14:06,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:14:06,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:14:06,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:14:06,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:14:06,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:14:06,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:14:06,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:14:06,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:14:06,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:14:06,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:14:06,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:14:06,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:14:06,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:14:06,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:14:06,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:14:06,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:14:06,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:14:06,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:14:06,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:14:06,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:14:06,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:14:06,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:14:06,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:14:06,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:14:06,119 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:14:06,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:14:06,119 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:14:06,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:14:06,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:14:06,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:14:06,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:14:06,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:14:06,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:14:06,123 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:14:06,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:14:06,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:14:06,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:14:06,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:14:06,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:14:06,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:14:06,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:14:06,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:14:06,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:14:06,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:14:06,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:14:06,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:14:06,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:14:06,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:14:06,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:14:06,127 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 -> 85b220978bb74f9e1328fc34d0757a27ef5e1bc9 [2020-10-19 22:14:06,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:14:06,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:14:06,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:14:06,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:14:06,370 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:14:06,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/modsf.c [2020-10-19 22:14:06,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb04a0acf/7c70b845cecf43ef8f2ec1cbed83943d/FLAGf75f0d197 [2020-10-19 22:14:06,923 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:14:06,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modsf.c [2020-10-19 22:14:06,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb04a0acf/7c70b845cecf43ef8f2ec1cbed83943d/FLAGf75f0d197 [2020-10-19 22:14:07,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb04a0acf/7c70b845cecf43ef8f2ec1cbed83943d [2020-10-19 22:14:07,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:14:07,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:14:07,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:14:07,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:14:07,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:14:07,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38530b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07, skipping insertion in model container [2020-10-19 22:14:07,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:14:07,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:14:07,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:14:07,685 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:14:07,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:14:07,731 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:14:07,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07 WrapperNode [2020-10-19 22:14:07,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:14:07,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:14:07,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:14:07,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:14:07,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:14:07,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:14:07,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:14:07,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:14:07,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (1/1) ... [2020-10-19 22:14:07,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:14:07,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:14:07,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:14:07,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:14:07,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (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 [2020-10-19 22:14:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:14:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:14:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:14:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:14:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:14:07,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:14:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:14:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:14:08,523 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:14:08,523 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-10-19 22:14:08,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:14:08 BoogieIcfgContainer [2020-10-19 22:14:08,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:14:08,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:14:08,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:14:08,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:14:08,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:14:07" (1/3) ... [2020-10-19 22:14:08,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474bca18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:14:08, skipping insertion in model container [2020-10-19 22:14:08,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:07" (2/3) ... [2020-10-19 22:14:08,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474bca18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:14:08, skipping insertion in model container [2020-10-19 22:14:08,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:14:08" (3/3) ... [2020-10-19 22:14:08,541 INFO L111 eAbstractionObserver]: Analyzing ICFG modsf.c [2020-10-19 22:14:08,553 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:14:08,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:14:08,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:14:08,599 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:14:08,599 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:14:08,599 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:14:08,599 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:14:08,600 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:14:08,600 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:14:08,600 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:14:08,600 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:14:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-19 22:14:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:14:08,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:14:08,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:14:08,624 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:14:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:14:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1389277550, now seen corresponding path program 1 times [2020-10-19 22:14:08,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:14:08,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169767058] [2020-10-19 22:14:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:14:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:14:08,778 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 22:14:08,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169767058] [2020-10-19 22:14:08,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:14:08,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:14:08,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538064948] [2020-10-19 22:14:08,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:14:08,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:14:08,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:14:08,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:14:08,808 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-10-19 22:14:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:14:08,828 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2020-10-19 22:14:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:14:08,830 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-10-19 22:14:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:14:08,840 INFO L225 Difference]: With dead ends: 51 [2020-10-19 22:14:08,841 INFO L226 Difference]: Without dead ends: 23 [2020-10-19 22:14:08,844 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 22:14:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-19 22:14:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-19 22:14:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:14:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-19 22:14:08,881 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-10-19 22:14:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:14:08,881 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-19 22:14:08,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:14:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-19 22:14:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:14:08,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:14:08,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:14:08,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:14:08,883 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:14:08,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:14:08,884 INFO L82 PathProgramCache]: Analyzing trace with hash 796930410, now seen corresponding path program 1 times [2020-10-19 22:14:08,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:14:08,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500749493] [2020-10-19 22:14:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:14:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:14:08,967 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 22:14:08,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500749493] [2020-10-19 22:14:08,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:14:08,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:14:08,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601133057] [2020-10-19 22:14:08,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:14:08,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:14:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:14:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:14:08,971 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-10-19 22:14:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:14:09,080 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-19 22:14:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:14:09,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-19 22:14:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:14:09,082 INFO L225 Difference]: With dead ends: 53 [2020-10-19 22:14:09,082 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 22:14:09,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:14:09,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 22:14:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-10-19 22:14:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 22:14:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-19 22:14:09,091 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2020-10-19 22:14:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:14:09,091 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-19 22:14:09,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:14:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-19 22:14:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 22:14:09,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:14:09,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:14:09,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:14:09,093 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:14:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:14:09,094 INFO L82 PathProgramCache]: Analyzing trace with hash 495241442, now seen corresponding path program 1 times [2020-10-19 22:14:09,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:14:09,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637863765] [2020-10-19 22:14:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:14:09,125 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:14:09,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170418288] [2020-10-19 22:14:09,125 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 22:14:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:14:09,221 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:14:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:14:09,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:14:09,293 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:14:09,293 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:14:09,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:14:09,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:14:09 BoogieIcfgContainer [2020-10-19 22:14:09,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:14:09,559 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:14:09,560 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:14:09,560 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:14:09,560 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:14:08" (3/4) ... [2020-10-19 22:14:09,563 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:14:09,629 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:14:09,629 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:14:09,632 INFO L168 Benchmark]: Toolchain (without parser) took 2289.54 ms. Allocated memory was 40.4 MB in the beginning and 45.1 MB in the end (delta: 4.7 MB). Free memory was 17.8 MB in the beginning and 15.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:09,633 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 30.9 MB. Free memory was 17.0 MB in the beginning and 17.0 MB in the end (delta: 32.0 kB). Peak memory consumption was 32.0 kB. Max. memory is 14.3 GB. [2020-10-19 22:14:09,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.27 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 16.9 MB in the beginning and 16.7 MB in the end (delta: 247.8 kB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:09,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.08 ms. Allocated memory is still 41.4 MB. Free memory was 16.5 MB in the beginning and 14.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:09,635 INFO L168 Benchmark]: Boogie Preprocessor took 72.98 ms. Allocated memory is still 41.4 MB. Free memory was 14.7 MB in the beginning and 13.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:09,636 INFO L168 Benchmark]: RCFGBuilder took 663.63 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 13.0 MB in the beginning and 26.1 MB in the end (delta: -13.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:09,637 INFO L168 Benchmark]: TraceAbstraction took 1026.40 ms. Allocated memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Free memory was 25.6 MB in the beginning and 19.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:09,637 INFO L168 Benchmark]: Witness Printer took 70.14 ms. Allocated memory is still 45.1 MB. Free memory was 19.3 MB in the beginning and 15.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:09,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 30.9 MB. Free memory was 17.0 MB in the beginning and 17.0 MB in the end (delta: 32.0 kB). Peak memory consumption was 32.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 383.27 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 16.9 MB in the beginning and 16.7 MB in the end (delta: 247.8 kB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 62.08 ms. Allocated memory is still 41.4 MB. Free memory was 16.5 MB in the beginning and 14.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 72.98 ms. Allocated memory is still 41.4 MB. Free memory was 14.7 MB in the beginning and 13.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 663.63 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 13.0 MB in the beginning and 26.1 MB in the end (delta: -13.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1026.40 ms. Allocated memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Free memory was 25.6 MB in the beginning and 19.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. * Witness Printer took 70.14 ms. Allocated memory is still 45.1 MB. Free memory was 19.3 MB in the beginning and 15.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 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 sum[1]; [L29] long long *a = malloc(sizeof(long long)*N); [L31] sum[0] = 0 [L32] i=0 VAL [N=1] [L32] COND TRUE i