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_RubberTaipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memset2_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 13:21:00,170 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 13:21:00,172 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 13:21:00,184 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 13:21:00,185 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 13:21:00,186 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 13:21:00,187 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 13:21:00,188 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 13:21:00,190 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 13:21:00,190 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 13:21:00,191 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 13:21:00,191 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 13:21:00,192 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 13:21:00,193 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 13:21:00,194 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 13:21:00,196 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 13:21:00,199 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 13:21:00,201 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 13:21:00,202 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 13:21:00,203 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 13:21:00,206 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 13:21:00,211 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 13:21:00,212 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 13:21:00,212 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_RubberTaipan+AI_EQ.epf [2018-01-24 13:21:00,222 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 13:21:00,223 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 13:21:00,223 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 13:21:00,224 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 13:21:00,224 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 13:21:00,224 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 13:21:00,224 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 13:21:00,225 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 13:21:00,225 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 13:21:00,225 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 13:21:00,225 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 13:21:00,226 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 13:21:00,226 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 13:21:00,226 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 13:21:00,226 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 13:21:00,226 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 13:21:00,227 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 13:21:00,227 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 13:21:00,227 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 13:21:00,227 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 13:21:00,227 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 13:21:00,228 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 13:21:00,228 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 13:21:00,228 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 13:21:00,228 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 13:21:00,228 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 13:21:00,229 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 13:21:00,229 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 13:21:00,229 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-01-24 13:21:00,229 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 13:21:00,229 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 13:21:00,229 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 13:21:00,230 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 13:21:00,231 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 13:21:00,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 13:21:00,280 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 13:21:00,284 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 13:21:00,286 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 13:21:00,286 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 13:21:00,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memset2_true-valid-memsafety_true-termination.c [2018-01-24 13:21:00,401 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 13:21:00,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 13:21:00,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 13:21:00,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 13:21:00,418 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 13:21:00,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed2eda8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00, skipping insertion in model container [2018-01-24 13:21:00,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,441 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 13:21:00,459 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 13:21:00,571 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 13:21:00,584 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 13:21:00,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00 WrapperNode [2018-01-24 13:21:00,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 13:21:00,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 13:21:00,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 13:21:00,589 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 13:21:00,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (1/1) ... [2018-01-24 13:21:00,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 13:21:00,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 13:21:00,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 13:21:00,618 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 13:21:00,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (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 13:21:00,665 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 13:21:00,665 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 13:21:00,665 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 13:21:00,665 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 13:21:00,665 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 13:21:00,666 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 13:21:00,666 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-24 13:21:00,666 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-24 13:21:00,666 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-24 13:21:00,666 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 13:21:00,666 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 13:21:00,667 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 13:21:00,737 WARN L455 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-01-24 13:21:00,779 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 13:21:00,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 01:21:00 BoogieIcfgContainer [2018-01-24 13:21:00,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 13:21:00,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 13:21:00,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 13:21:00,782 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 13:21:00,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 01:21:00" (1/3) ... [2018-01-24 13:21:00,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bb5ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 01:21:00, skipping insertion in model container [2018-01-24 13:21:00,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 01:21:00" (2/3) ... [2018-01-24 13:21:00,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bb5ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 01:21:00, skipping insertion in model container [2018-01-24 13:21:00,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 01:21:00" (3/3) ... [2018-01-24 13:21:00,786 INFO L105 eAbstractionObserver]: Analyzing ICFG memset2_true-valid-memsafety_true-termination.c [2018-01-24 13:21:00,793 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 13:21:00,799 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-24 13:21:00,834 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 13:21:00,834 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 13:21:00,834 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 13:21:00,834 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 13:21:00,834 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 13:21:00,835 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 13:21:00,835 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 13:21:00,835 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 13:21:00,836 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 13:21:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-24 13:21:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 13:21:00,861 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 13:21:00,862 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 13:21:00,862 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 13:21:00,868 INFO L82 PathProgramCache]: Analyzing trace with hash 682221498, now seen corresponding path program 1 times [2018-01-24 13:21:00,870 INFO L67 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-01-24 13:21:00,917 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:00,917 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 13:21:00,917 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:00,918 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 13:21:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 13:21:00,959 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 13:21:01,006 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 13:21:01,008 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 13:21:01,009 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 13:21:01,009 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 13:21:01,012 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 13:21:01,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 13:21:01,027 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 13:21:01,030 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2018-01-24 13:21:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 13:21:01,077 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-01-24 13:21:01,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 13:21:01,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 13:21:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 13:21:01,089 INFO L225 Difference]: With dead ends: 22 [2018-01-24 13:21:01,090 INFO L226 Difference]: Without dead ends: 18 [2018-01-24 13:21:01,093 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 13:21:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-24 13:21:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-24 13:21:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-24 13:21:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-24 13:21:01,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 7 [2018-01-24 13:21:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 13:21:01,124 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-24 13:21:01,124 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 13:21:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-24 13:21:01,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 13:21:01,125 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 13:21:01,125 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 13:21:01,125 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 13:21:01,126 INFO L82 PathProgramCache]: Analyzing trace with hash 682221499, now seen corresponding path program 1 times [2018-01-24 13:21:01,126 INFO L67 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-01-24 13:21:01,127 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:01,127 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 13:21:01,128 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:01,128 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 13:21:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 13:21:01,212 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 13:21:01,270 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 13:21:01,270 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 13:21:01,271 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 13:21:01,271 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 13:21:01,272 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 13:21:01,272 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 13:21:01,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 13:21:01,273 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-01-24 13:21:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 13:21:01,296 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-01-24 13:21:01,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 13:21:01,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 13:21:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 13:21:01,297 INFO L225 Difference]: With dead ends: 18 [2018-01-24 13:21:01,297 INFO L226 Difference]: Without dead ends: 17 [2018-01-24 13:21:01,298 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 13:21:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-01-24 13:21:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-01-24 13:21:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-01-24 13:21:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-01-24 13:21:01,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2018-01-24 13:21:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 13:21:01,303 INFO L432 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-01-24 13:21:01,303 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 13:21:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-01-24 13:21:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 13:21:01,304 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 13:21:01,304 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 13:21:01,305 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 13:21:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -898824040, now seen corresponding path program 1 times [2018-01-24 13:21:01,305 INFO L67 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-01-24 13:21:01,306 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:01,306 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 13:21:01,306 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:01,307 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 13:21:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 13:21:01,322 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 13:21:01,373 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 13:21:01,374 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 13:21:01,374 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 13:21:01,374 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 13:21:01,375 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 13:21:01,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 13:21:01,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 13:21:01,375 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states. [2018-01-24 13:21:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 13:21:01,404 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-01-24 13:21:01,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 13:21:01,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 13:21:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 13:21:01,406 INFO L225 Difference]: With dead ends: 25 [2018-01-24 13:21:01,406 INFO L226 Difference]: Without dead ends: 18 [2018-01-24 13:21:01,407 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 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 13:21:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-24 13:21:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-24 13:21:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-24 13:21:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-24 13:21:01,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-01-24 13:21:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 13:21:01,412 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-24 13:21:01,412 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 13:21:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-24 13:21:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 13:21:01,413 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 13:21:01,413 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 13:21:01,413 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 13:21:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1616948477, now seen corresponding path program 1 times [2018-01-24 13:21:01,414 INFO L67 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-01-24 13:21:01,415 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:01,415 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 13:21:01,415 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:01,415 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 13:21:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 13:21:01,432 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 13:21:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 13:21:01,487 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 13:21:01,487 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 13:21:01,507 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 13:21:01,508 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 13:21:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 13:21:01,545 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 13:21:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 13:21:01,611 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 13:21:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 13:21:01,719 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 13:21:01,719 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-24 13:21:01,724 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 13:21:01,724 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 13:21:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 13:21:01,753 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 13:21:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 13:21:01,759 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 13:21:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 13:21:01,799 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-24 13:21:01,800 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-01-24 13:21:01,800 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-24 13:21:01,800 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 13:21:01,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 13:21:01,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-01-24 13:21:01,801 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-01-24 13:21:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 13:21:01,845 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-01-24 13:21:01,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 13:21:01,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-01-24 13:21:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 13:21:01,846 INFO L225 Difference]: With dead ends: 26 [2018-01-24 13:21:01,847 INFO L226 Difference]: Without dead ends: 19 [2018-01-24 13:21:01,847 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-01-24 13:21:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-24 13:21:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-24 13:21:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-24 13:21:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-24 13:21:01,851 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-24 13:21:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 13:21:01,852 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-24 13:21:01,852 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 13:21:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-24 13:21:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 13:21:01,853 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 13:21:01,853 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 13:21:01,853 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 13:21:01,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1998482120, now seen corresponding path program 2 times [2018-01-24 13:21:01,854 INFO L67 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-01-24 13:21:01,855 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:01,855 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 13:21:01,855 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 13:21:01,855 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 13:21:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 13:21:01,870 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 13:21:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 13:21:01,952 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 13:21:01,952 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 13:21:01,963 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 13:21:01,963 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-24 13:21:01,976 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 13:21:01,989 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 13:21:01,992 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 13:21:02,035 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 13:21:02,044 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-01-24 13:21:02,044 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 13:21:02,060 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 13:21:02,060 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-01-24 13:21:02,109 WARN L1029 $PredicateComparison]: unable to prove that (exists ((|main_~#cstats~2.base| Int)) (and (= (select |c_old(#valid)| |main_~#cstats~2.base|) 0) (= |c_#valid| (store |c_old(#valid)| |main_~#cstats~2.base| 0)))) is different from true [2018-01-24 13:21:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 13:21:02,114 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 13:21:02,140 WARN L1007 $PredicateComparison]: unable to prove that (forall ((|v_main_~#cstats~2.base_12| Int)) (or (= (store |c_#valid| |v_main_~#cstats~2.base_12| 0) |c_old(#valid)|) (not (= 0 (select |c_#valid| |v_main_~#cstats~2.base_12|))))) is different from false [2018-01-24 13:21:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 13:21:02,167 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-24 13:21:02,167 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 12 [2018-01-24 13:21:02,167 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 13:21:02,167 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 13:21:02,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 13:21:02,168 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=68, Unknown=2, NotChecked=34, Total=132 [2018-01-24 13:21:02,168 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-01-24 13:21:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 13:21:02,317 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-01-24 13:21:02,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 13:21:02,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 13:21:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 13:21:02,318 INFO L225 Difference]: With dead ends: 19 [2018-01-24 13:21:02,319 INFO L226 Difference]: Without dead ends: 0 [2018-01-24 13:21:02,319 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=103, Unknown=2, NotChecked=42, Total=182 [2018-01-24 13:21:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-24 13:21:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-24 13:21:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-24 13:21:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-24 13:21:02,320 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-24 13:21:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 13:21:02,320 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-24 13:21:02,320 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 13:21:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-24 13:21:02,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-24 13:21:02,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-24 13:21:02,387 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 24) no Hoare annotation was computed. [2018-01-24 13:21:02,388 INFO L397 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 24) the Hoare annotation is: (= |#valid| |old(#valid)|) [2018-01-24 13:21:02,388 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 24) no Hoare annotation was computed. [2018-01-24 13:21:02,388 INFO L404 ceAbstractionStarter]: At program point #Ultimate.C_memsetENTRY(line -1) the Hoare annotation is: true [2018-01-24 13:21:02,388 INFO L404 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-01-24 13:21:02,388 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetFINAL(line -1) no Hoare annotation was computed. [2018-01-24 13:21:02,389 INFO L401 ceAbstractionStarter]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2018-01-24 13:21:02,389 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetEXIT(line -1) no Hoare annotation was computed. [2018-01-24 13:21:02,389 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 24) the Hoare annotation is: true [2018-01-24 13:21:02,389 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 24) no Hoare annotation was computed. [2018-01-24 13:21:02,389 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 24) the Hoare annotation is: true [2018-01-24 13:21:02,389 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 24) no Hoare annotation was computed. [2018-01-24 13:21:02,390 INFO L397 ceAbstractionStarter]: At program point mainENTRY(lines 20 24) the Hoare annotation is: (= |#valid| |old(#valid)|) [2018-01-24 13:21:02,390 INFO L401 ceAbstractionStarter]: For program point mainErr1RequiresViolation(line -1) no Hoare annotation was computed. [2018-01-24 13:21:02,390 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 20 24) no Hoare annotation was computed. [2018-01-24 13:21:02,390 INFO L401 ceAbstractionStarter]: For program point mainErr2EnsuresViolation(lines 20 24) no Hoare annotation was computed. [2018-01-24 13:21:02,390 INFO L397 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= |main_~#cstats~2.offset| 0) (= (select |#length| |main_~#cstats~2.base|) 40) (= |#valid| (store |old(#valid)| |main_~#cstats~2.base| 1)) (= (select |old(#valid)| |main_~#cstats~2.base|) 0)) [2018-01-24 13:21:02,391 INFO L401 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-01-24 13:21:02,391 INFO L401 ceAbstractionStarter]: For program point mainErr0RequiresViolation(line -1) no Hoare annotation was computed. [2018-01-24 13:21:02,391 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-24 13:21:02,391 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-24 13:21:02,391 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 20 24) no Hoare annotation was computed. [2018-01-24 13:21:02,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 01:21:02 BoogieIcfgContainer [2018-01-24 13:21:02,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 13:21:02,399 INFO L168 Benchmark]: Toolchain (without parser) took 1996.58 ms. Allocated memory was 306.7 MB in the beginning and 465.6 MB in the end (delta: 158.9 MB). Free memory was 267.7 MB in the beginning and 346.6 MB in the end (delta: -78.8 MB). Peak memory consumption was 80.0 MB. Max. memory is 5.3 GB. [2018-01-24 13:21:02,400 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 306.7 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 13:21:02,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.83 ms. Allocated memory is still 306.7 MB. Free memory was 265.8 MB in the beginning and 257.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-24 13:21:02,401 INFO L168 Benchmark]: Boogie Preprocessor took 28.54 ms. Allocated memory is still 306.7 MB. Free memory is still 257.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 13:21:02,401 INFO L168 Benchmark]: RCFGBuilder took 161.81 ms. Allocated memory is still 306.7 MB. Free memory was 257.8 MB in the beginning and 245.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 5.3 GB. [2018-01-24 13:21:02,401 INFO L168 Benchmark]: TraceAbstraction took 1617.19 ms. Allocated memory was 306.7 MB in the beginning and 465.6 MB in the end (delta: 158.9 MB). Free memory was 245.2 MB in the beginning and 346.6 MB in the end (delta: -101.4 MB). Peak memory consumption was 57.5 MB. Max. memory is 5.3 GB. [2018-01-24 13:21:02,403 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 306.7 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 179.83 ms. Allocated memory is still 306.7 MB. Free memory was 265.8 MB in the beginning and 257.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.54 ms. Allocated memory is still 306.7 MB. Free memory is still 257.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * RCFGBuilder took 161.81 ms. Allocated memory is still 306.7 MB. Free memory was 257.8 MB in the beginning and 245.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1617.19 ms. Allocated memory was 306.7 MB in the beginning and 465.6 MB in the end (delta: 158.9 MB). Free memory was 245.2 MB in the beginning and 346.6 MB in the end (delta: -101.4 MB). Peak memory consumption was 57.5 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 3 error locations. SAFE Result, 1.5s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 76 SDtfs, 17 SDslu, 84 SDs, 0 SdLazy, 51 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 9 NumberOfFragments, 30 HoareAnnotationTreeSize, 7 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 117 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 158 ConstructedInterpolants, 10 QuantifiedInterpolants, 6224 SizeOfPredicates, 3 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 6/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_RubberTaipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_13-21-02-412.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_RubberTaipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_13-21-02-412.csv Received shutdown request...