java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/array-memsafety/mult_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 15:10:54,952 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 15:10:54,954 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 15:10:54,968 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 15:10:54,968 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 15:10:54,969 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 15:10:54,970 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 15:10:54,972 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 15:10:54,974 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 15:10:54,975 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 15:10:54,975 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 15:10:54,976 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 15:10:54,976 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 15:10:54,977 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 15:10:54,978 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 15:10:54,980 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 15:10:54,982 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 15:10:54,984 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 15:10:54,986 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 15:10:54,987 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 15:10:54,989 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 15:10:54,994 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 15:10:54,994 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 15:10:54,995 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-24 15:10:55,004 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 15:10:55,004 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 15:10:55,005 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 15:10:55,006 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 15:10:55,006 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 15:10:55,006 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 15:10:55,006 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 15:10:55,007 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 15:10:55,007 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 15:10:55,007 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 15:10:55,007 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 15:10:55,008 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 15:10:55,008 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 15:10:55,008 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 15:10:55,008 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 15:10:55,008 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 15:10:55,009 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 15:10:55,009 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 15:10:55,009 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 15:10:55,009 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 15:10:55,010 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 15:10:55,010 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 15:10:55,010 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 15:10:55,010 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 15:10:55,010 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 15:10:55,011 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 15:10:55,011 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 15:10:55,011 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 15:10:55,011 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 15:10:55,011 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 15:10:55,012 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 15:10:55,012 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 15:10:55,012 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 15:10:55,013 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 15:10:55,013 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 15:10:55,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 15:10:55,060 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 15:10:55,064 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 15:10:55,065 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 15:10:55,066 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 15:10:55,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/mult_array_unsafe_false-valid-deref.i [2018-01-24 15:10:55,237 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 15:10:55,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 15:10:55,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 15:10:55,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 15:10:55,246 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 15:10:55,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a59f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55, skipping insertion in model container [2018-01-24 15:10:55,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,265 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 15:10:55,303 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 15:10:55,411 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 15:10:55,425 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 15:10:55,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55 WrapperNode [2018-01-24 15:10:55,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 15:10:55,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 15:10:55,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 15:10:55,433 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 15:10:55,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (1/1) ... [2018-01-24 15:10:55,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 15:10:55,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 15:10:55,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 15:10:55,463 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 15:10:55,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (1/1) ... No working directory specified, using /storage/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 [2018-01-24 15:10:55,506 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 15:10:55,507 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 15:10:55,507 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 15:10:55,507 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 15:10:55,507 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 15:10:55,507 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 15:10:55,507 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 15:10:55,507 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 15:10:55,508 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 15:10:55,508 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 15:10:55,508 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 15:10:55,508 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 15:10:55,682 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 15:10:55,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 03:10:55 BoogieIcfgContainer [2018-01-24 15:10:55,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 15:10:55,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 15:10:55,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 15:10:55,685 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 15:10:55,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 03:10:55" (1/3) ... [2018-01-24 15:10:55,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5011be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 03:10:55, skipping insertion in model container [2018-01-24 15:10:55,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:55" (2/3) ... [2018-01-24 15:10:55,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5011be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 03:10:55, skipping insertion in model container [2018-01-24 15:10:55,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 03:10:55" (3/3) ... [2018-01-24 15:10:55,688 INFO L105 eAbstractionObserver]: Analyzing ICFG mult_array_unsafe_false-valid-deref.i [2018-01-24 15:10:55,695 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 15:10:55,700 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-01-24 15:10:55,740 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 15:10:55,741 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 15:10:55,741 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 15:10:55,741 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 15:10:55,741 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 15:10:55,741 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 15:10:55,742 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 15:10:55,742 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 15:10:55,743 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 15:10:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2018-01-24 15:10:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 15:10:55,770 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:10:55,771 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:10:55,771 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 15:10:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash 83465695, now seen corresponding path program 1 times [2018-01-24 15:10:55,778 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:10:55,816 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:10:55,816 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:10:55,816 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:10:55,817 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:10:55,857 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-24 15:10:55,857 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-24 15:10:55,857 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/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 [2018-01-24 15:10:55,866 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:10:55,867 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-24 15:10:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:10:55,914 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-24 15:10:55,915 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-24 15:10:55,915 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 15:10:55,915 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 15:10:55,926 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:10:55,926 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 15:10:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:10:55,966 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 15:10:56,005 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-01-24 15:10:56,007 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 15:10:56,015 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 15:10:56,015 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-01-24 15:10:56,052 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-01-24 15:10:56,053 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 15:10:56,063 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-24 15:10:56,063 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:11 [2018-01-24 15:10:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 15:10:56,086 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 15:10:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 15:10:56,138 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-24 15:10:56,138 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2018-01-24 15:10:56,139 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:10:56,141 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 15:10:56,210 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 15:10:56,211 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 15:10:56,212 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2018-01-24 15:10:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:10:56,305 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-24 15:10:56,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 15:10:56,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-24 15:10:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:10:56,316 INFO L225 Difference]: With dead ends: 66 [2018-01-24 15:10:56,316 INFO L226 Difference]: Without dead ends: 41 [2018-01-24 15:10:56,319 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 15:10:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-24 15:10:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-24 15:10:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-24 15:10:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-01-24 15:10:56,353 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 17 [2018-01-24 15:10:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:10:56,353 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-01-24 15:10:56,353 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 15:10:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-01-24 15:10:56,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 15:10:56,354 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:10:56,354 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:10:56,354 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 15:10:56,354 INFO L82 PathProgramCache]: Analyzing trace with hash 83465696, now seen corresponding path program 1 times [2018-01-24 15:10:56,354 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:10:56,355 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:10:56,356 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:10:56,356 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:10:56,356 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:10:56,365 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-24 15:10:56,365 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-24 15:10:56,365 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-24 15:10:56,375 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:10:56,375 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-24 15:10:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 15:10:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 15:10:56,434 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-24 15:10:56,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 03:10:56 BoogieIcfgContainer [2018-01-24 15:10:56,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 15:10:56,462 INFO L168 Benchmark]: Toolchain (without parser) took 1224.75 ms. Allocated memory was 305.1 MB in the beginning and 463.5 MB in the end (delta: 158.3 MB). Free memory was 265.2 MB in the beginning and 418.0 MB in the end (delta: -152.8 MB). Peak memory consumption was 5.5 MB. Max. memory is 5.3 GB. [2018-01-24 15:10:56,464 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 305.1 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 15:10:56,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.25 ms. Allocated memory is still 305.1 MB. Free memory was 264.2 MB in the beginning and 254.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 5.3 GB. [2018-01-24 15:10:56,465 INFO L168 Benchmark]: Boogie Preprocessor took 28.99 ms. Allocated memory is still 305.1 MB. Free memory was 254.0 MB in the beginning and 253.0 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-24 15:10:56,466 INFO L168 Benchmark]: RCFGBuilder took 220.33 ms. Allocated memory is still 305.1 MB. Free memory was 253.0 MB in the beginning and 235.4 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. [2018-01-24 15:10:56,466 INFO L168 Benchmark]: TraceAbstraction took 778.43 ms. Allocated memory was 305.1 MB in the beginning and 463.5 MB in the end (delta: 158.3 MB). Free memory was 235.4 MB in the beginning and 418.0 MB in the end (delta: -182.7 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 15:10:56,469 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 305.1 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 191.25 ms. Allocated memory is still 305.1 MB. Free memory was 264.2 MB in the beginning and 254.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.99 ms. Allocated memory is still 305.1 MB. Free memory was 254.0 MB in the beginning and 253.0 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 220.33 ms. Allocated memory is still 305.1 MB. Free memory was 253.0 MB in the beginning and 235.4 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 778.43 ms. Allocated memory was 305.1 MB in the beginning and 463.5 MB in the end (delta: 158.3 MB). Free memory was 235.4 MB in the beginning and 418.0 MB in the end (delta: -182.7 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L541] int i, j; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L543] length = 1 VAL [length=1] [L544] int fac = __VERIFIER_nondet_int(); [L545] COND FALSE !(fac < 1 || fac >= 2147483647 / (sizeof(int) * length)) VAL [fac=8457, length=1] [L546] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={6:0}, fac=8457, length=1] [L546] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={6:0}, arr={6:0}, fac=8457, length=1] [L547] EXPR, FCALL __builtin_alloca (fac*length) VAL [__builtin_alloca (fac*length)={5:0}, __builtin_alloca (length)={6:0}, arr={6:0}, fac=8457, length=1] [L547] int *arr2 = __builtin_alloca (fac*length); VAL [__builtin_alloca (fac*length)={5:0}, __builtin_alloca (length)={6:0}, arr={6:0}, arr2={5:0}, fac=8457, length=1] [L548] COND FALSE !(!arr || !arr2) [L549] i=0 VAL [__builtin_alloca (fac*length)={5:0}, __builtin_alloca (length)={6:0}, arr={6:0}, arr2={5:0}, fac=8457, i=0, length=1] [L549] COND TRUE i