./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/sqm-iff.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/sqm-iff.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 1a5bf013e0e121d7379402f0bf74321ad24fd8fa ..................................................................................................................................................................................................................................................................................................................................................... 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 22:18:55,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:18:55,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:18:55,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:18:55,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:18:55,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:18:55,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:18:55,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:18:55,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:18:55,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:18:55,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:18:55,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:18:55,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:18:55,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:18:55,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:18:55,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:18:55,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:18:55,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:18:55,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:18:55,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:18:55,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:18:55,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:18:55,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:18:56,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:18:56,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:18:56,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:18:56,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:18:56,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:18:56,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:18:56,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:18:56,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:18:56,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:18:56,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:18:56,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:18:56,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:18:56,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:18:56,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:18:56,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:18:56,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:18:56,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:18:56,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:18:56,019 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:18:56,064 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:18:56,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:18:56,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:18:56,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:18:56,067 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:18:56,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:18:56,068 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:18:56,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:18:56,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:18:56,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:18:56,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:18:56,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:18:56,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:18:56,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:18:56,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:18:56,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:18:56,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:18:56,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:18:56,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:18:56,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:18:56,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:18:56,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:18:56,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:18:56,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:18:56,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:18:56,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:18:56,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:18:56,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:18:56,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:18:56,075 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 -> 1a5bf013e0e121d7379402f0bf74321ad24fd8fa [2020-10-19 22:18:56,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:18:56,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:18:56,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:18:56,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:18:56,293 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:18:56,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sqm-iff.c [2020-10-19 22:18:56,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/592210d7b/5ef1bbb159da460a9f1d3947f8709b9b/FLAG8e7e8590c [2020-10-19 22:18:56,856 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:18:56,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm-iff.c [2020-10-19 22:18:56,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/592210d7b/5ef1bbb159da460a9f1d3947f8709b9b/FLAG8e7e8590c [2020-10-19 22:18:57,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/592210d7b/5ef1bbb159da460a9f1d3947f8709b9b [2020-10-19 22:18:57,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:18:57,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:18:57,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:18:57,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:18:57,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:18:57,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581f030e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57, skipping insertion in model container [2020-10-19 22:18:57,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:18:57,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:18:57,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:18:57,464 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:18:57,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:18:57,518 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:18:57,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57 WrapperNode [2020-10-19 22:18:57,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:18:57,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:18:57,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:18:57,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:18:57,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:18:57,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:18:57,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:18:57,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:18:57,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (1/1) ... [2020-10-19 22:18:57,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:18:57,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:18:57,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:18:57,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:18:57,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (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 22:18:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:18:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:18:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:18:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:18:57,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:18:57,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:18:57,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:18:57,920 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:18:57,920 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-19 22:18:57,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:18:57 BoogieIcfgContainer [2020-10-19 22:18:57,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:18:57,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:18:57,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:18:57,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:18:57,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:18:57" (1/3) ... [2020-10-19 22:18:57,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723e2e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:18:57, skipping insertion in model container [2020-10-19 22:18:57,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:18:57" (2/3) ... [2020-10-19 22:18:57,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723e2e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:18:57, skipping insertion in model container [2020-10-19 22:18:57,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:18:57" (3/3) ... [2020-10-19 22:18:57,946 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm-iff.c [2020-10-19 22:18:57,971 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:18:57,990 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:18:58,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:18:58,034 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:18:58,035 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:18:58,035 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:18:58,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:18:58,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:18:58,036 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:18:58,036 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:18:58,036 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:18:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-19 22:18:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:18:58,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:18:58,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:18:58,065 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:18:58,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:18:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-10-19 22:18:58,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:18:58,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149335563] [2020-10-19 22:18:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:18:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:18:58,228 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 22:18:58,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149335563] [2020-10-19 22:18:58,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:18:58,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:18:58,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162441284] [2020-10-19 22:18:58,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:18:58,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:18:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:18:58,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:18:58,253 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-10-19 22:18:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:18:58,287 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-10-19 22:18:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:18:58,289 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-19 22:18:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:18:58,300 INFO L225 Difference]: With dead ends: 43 [2020-10-19 22:18:58,300 INFO L226 Difference]: Without dead ends: 19 [2020-10-19 22:18:58,304 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 22:18:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-19 22:18:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-19 22:18:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 22:18:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-19 22:18:58,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-10-19 22:18:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:18:58,346 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-19 22:18:58,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:18:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-19 22:18:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:18:58,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:18:58,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:18:58,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:18:58,349 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:18:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:18:58,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-10-19 22:18:58,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:18:58,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530202190] [2020-10-19 22:18:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:18:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:18:58,447 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 22:18:58,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530202190] [2020-10-19 22:18:58,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:18:58,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:18:58,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827199642] [2020-10-19 22:18:58,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:18:58,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:18:58,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:18:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:18:58,451 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-10-19 22:18:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:18:58,535 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-19 22:18:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:18:58,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-19 22:18:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:18:58,547 INFO L225 Difference]: With dead ends: 45 [2020-10-19 22:18:58,548 INFO L226 Difference]: Without dead ends: 31 [2020-10-19 22:18:58,549 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 22:18:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-19 22:18:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-19 22:18:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:18:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-19 22:18:58,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-10-19 22:18:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:18:58,557 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-19 22:18:58,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:18:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-19 22:18:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:18:58,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:18:58,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:18:58,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:18:58,559 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:18:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:18:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-10-19 22:18:58,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:18:58,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121718941] [2020-10-19 22:18:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:18:58,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:18:58,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598500561] [2020-10-19 22:18:58,586 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 22:18:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:18:58,660 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:18:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:18:58,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:18:58,710 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:18:58,711 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:18:58,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:18:58,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:18:58 BoogieIcfgContainer [2020-10-19 22:18:58,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:18:58,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:18:58,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:18:58,977 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:18:58,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:18:57" (3/4) ... [2020-10-19 22:18:58,980 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:18:59,041 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:18:59,041 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:18:59,044 INFO L168 Benchmark]: Toolchain (without parser) took 1819.34 ms. Allocated memory was 39.8 MB in the beginning and 44.0 MB in the end (delta: 4.2 MB). Free memory was 17.5 MB in the beginning and 23.1 MB in the end (delta: -5.6 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:18:59,045 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 30.9 MB. Free memory is still 6.1 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:18:59,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.85 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 16.6 MB in the beginning and 16.1 MB in the end (delta: 502.3 kB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:18:59,047 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.73 ms. Allocated memory is still 40.9 MB. Free memory was 16.1 MB in the beginning and 14.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:18:59,047 INFO L168 Benchmark]: Boogie Preprocessor took 30.91 ms. Allocated memory is still 40.9 MB. Free memory was 14.2 MB in the beginning and 12.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:18:59,048 INFO L168 Benchmark]: RCFGBuilder took 332.73 ms. Allocated memory was 40.9 MB in the beginning and 42.5 MB in the end (delta: 1.6 MB). Free memory was 12.7 MB in the beginning and 11.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:18:59,049 INFO L168 Benchmark]: TraceAbstraction took 1052.74 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 11.1 MB in the beginning and 26.3 MB in the end (delta: -15.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:18:59,050 INFO L168 Benchmark]: Witness Printer took 64.57 ms. Allocated memory is still 44.0 MB. Free memory was 26.0 MB in the beginning and 23.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:18:59,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 30.9 MB. Free memory is still 6.1 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 288.85 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 16.6 MB in the beginning and 16.1 MB in the end (delta: 502.3 kB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 38.73 ms. Allocated memory is still 40.9 MB. Free memory was 16.1 MB in the beginning and 14.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 30.91 ms. Allocated memory is still 40.9 MB. Free memory was 14.2 MB in the beginning and 12.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 332.73 ms. Allocated memory was 40.9 MB in the beginning and 42.5 MB in the end (delta: 1.6 MB). Free memory was 12.7 MB in the beginning and 11.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1052.74 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 11.1 MB in the beginning and 26.3 MB in the end (delta: -15.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * Witness Printer took 64.57 ms. Allocated memory is still 44.0 MB. Free memory was 26.0 MB in the beginning and 23.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 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] i=0 VAL [N=1] [L31] COND TRUE i