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_imprecise.epf -i ../../../trunk/examples/svcomp/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 17:09:39,677 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 17:09:39,679 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 17:09:39,697 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 17:09:39,697 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 17:09:39,698 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 17:09:39,699 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 17:09:39,701 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 17:09:39,704 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 17:09:39,704 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 17:09:39,705 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 17:09:39,706 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 17:09:39,707 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 17:09:39,708 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 17:09:39,709 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 17:09:39,711 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 17:09:39,714 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 17:09:39,716 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 17:09:39,717 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 17:09:39,718 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 17:09:39,721 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 17:09:39,721 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 17:09:39,721 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 17:09:39,723 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 17:09:39,723 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 17:09:39,725 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 17:09:39,725 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 17:09:39,726 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 17:09:39,726 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 17:09:39,726 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 17:09:39,727 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 17:09:39,727 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_imprecise.epf [2018-01-24 17:09:39,737 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 17:09:39,738 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 17:09:39,739 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 17:09:39,739 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 17:09:39,739 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 17:09:39,739 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-24 17:09:39,739 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 17:09:39,740 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 17:09:39,740 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 17:09:39,740 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 17:09:39,741 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 17:09:39,741 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 17:09:39,741 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 17:09:39,741 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 17:09:39,741 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 17:09:39,741 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 17:09:39,742 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 17:09:39,742 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 17:09:39,742 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 17:09:39,742 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 17:09:39,742 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 17:09:39,743 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 17:09:39,743 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 17:09:39,743 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 17:09:39,743 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 17:09:39,743 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 17:09:39,744 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 17:09:39,744 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 17:09:39,744 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 17:09:39,744 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 17:09:39,744 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 17:09:39,744 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 17:09:39,745 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 17:09:39,745 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 17:09:39,746 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 17:09:39,746 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 17:09:39,787 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 17:09:39,800 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 17:09:39,804 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 17:09:39,806 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 17:09:39,807 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 17:09:39,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i [2018-01-24 17:09:39,970 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 17:09:39,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 17:09:39,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 17:09:39,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 17:09:39,981 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 17:09:39,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 05:09:39" (1/1) ... [2018-01-24 17:09:39,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ee3542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:39, skipping insertion in model container [2018-01-24 17:09:39,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 05:09:39" (1/1) ... [2018-01-24 17:09:40,002 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 17:09:40,043 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 17:09:40,163 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 17:09:40,181 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 17:09:40,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40 WrapperNode [2018-01-24 17:09:40,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 17:09:40,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 17:09:40,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 17:09:40,189 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 17:09:40,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (1/1) ... [2018-01-24 17:09:40,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (1/1) ... [2018-01-24 17:09:40,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (1/1) ... [2018-01-24 17:09:40,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (1/1) ... [2018-01-24 17:09:40,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (1/1) ... [2018-01-24 17:09:40,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (1/1) ... [2018-01-24 17:09:40,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (1/1) ... [2018-01-24 17:09:40,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 17:09:40,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 17:09:40,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 17:09:40,227 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 17:09:40,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (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 17:09:40,280 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 17:09:40,281 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 17:09:40,281 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-24 17:09:40,281 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 17:09:40,281 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 17:09:40,281 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 17:09:40,281 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 17:09:40,282 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 17:09:40,282 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 17:09:40,282 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 17:09:40,282 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 17:09:40,282 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 17:09:40,282 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 17:09:40,283 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 17:09:40,283 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 17:09:40,283 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-24 17:09:40,283 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 17:09:40,283 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 17:09:40,283 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 17:09:40,669 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 17:09:40,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 05:09:40 BoogieIcfgContainer [2018-01-24 17:09:40,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 17:09:40,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 17:09:40,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 17:09:40,672 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 17:09:40,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 05:09:39" (1/3) ... [2018-01-24 17:09:40,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174eb665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 05:09:40, skipping insertion in model container [2018-01-24 17:09:40,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:09:40" (2/3) ... [2018-01-24 17:09:40,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174eb665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 05:09:40, skipping insertion in model container [2018-01-24 17:09:40,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 05:09:40" (3/3) ... [2018-01-24 17:09:40,676 INFO L105 eAbstractionObserver]: Analyzing ICFG list-ext_flag_false-unreach-call_false-valid-deref.i [2018-01-24 17:09:40,683 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 17:09:40,689 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 35 error locations. [2018-01-24 17:09:40,731 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 17:09:40,731 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 17:09:40,731 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 17:09:40,731 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 17:09:40,731 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 17:09:40,731 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 17:09:40,731 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 17:09:40,732 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 17:09:40,732 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 17:09:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2018-01-24 17:09:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 17:09:40,752 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:09:40,753 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:09:40,753 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 17:09:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1955450078, now seen corresponding path program 1 times [2018-01-24 17:09:40,759 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:09:40,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:40,803 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:09:40,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:40,804 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:09:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:09:40,853 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:09:40,885 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 17:09:40,887 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:09:40,887 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 17:09:40,887 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:09:40,890 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 17:09:40,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 17:09:40,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 17:09:40,903 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 2 states. [2018-01-24 17:09:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:09:41,009 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2018-01-24 17:09:41,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 17:09:41,010 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-24 17:09:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:09:41,018 INFO L225 Difference]: With dead ends: 146 [2018-01-24 17:09:41,018 INFO L226 Difference]: Without dead ends: 86 [2018-01-24 17:09:41,021 INFO L525 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 [2018-01-24 17:09:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-24 17:09:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-01-24 17:09:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-24 17:09:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2018-01-24 17:09:41,057 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 12 [2018-01-24 17:09:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:09:41,058 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2018-01-24 17:09:41,058 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 17:09:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2018-01-24 17:09:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 17:09:41,058 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:09:41,058 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:09:41,059 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 17:09:41,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2124161760, now seen corresponding path program 1 times [2018-01-24 17:09:41,059 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:09:41,060 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:41,061 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:09:41,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:41,061 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:09:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:09:41,080 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:09:41,135 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 17:09:41,136 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:09:41,136 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 17:09:41,136 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:09:41,137 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 17:09:41,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 17:09:41,138 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:09:41,138 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 5 states. [2018-01-24 17:09:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:09:41,419 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2018-01-24 17:09:41,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 17:09:41,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 17:09:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:09:41,420 INFO L225 Difference]: With dead ends: 112 [2018-01-24 17:09:41,421 INFO L226 Difference]: Without dead ends: 95 [2018-01-24 17:09:41,422 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 17:09:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-01-24 17:09:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2018-01-24 17:09:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-24 17:09:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2018-01-24 17:09:41,432 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 15 [2018-01-24 17:09:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:09:41,433 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2018-01-24 17:09:41,433 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 17:09:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2018-01-24 17:09:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 17:09:41,434 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:09:41,434 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:09:41,434 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 17:09:41,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2124161761, now seen corresponding path program 1 times [2018-01-24 17:09:41,435 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:09:41,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:41,436 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:09:41,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:41,437 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:09:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:09:41,455 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:09:41,563 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 17:09:41,563 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:09:41,563 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 17:09:41,563 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:09:41,564 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 17:09:41,564 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 17:09:41,564 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:09:41,564 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 5 states. [2018-01-24 17:09:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:09:41,825 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2018-01-24 17:09:41,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 17:09:41,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 17:09:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:09:41,827 INFO L225 Difference]: With dead ends: 132 [2018-01-24 17:09:41,827 INFO L226 Difference]: Without dead ends: 115 [2018-01-24 17:09:41,828 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 17:09:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-24 17:09:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2018-01-24 17:09:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-24 17:09:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2018-01-24 17:09:41,840 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 15 [2018-01-24 17:09:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:09:41,841 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2018-01-24 17:09:41,841 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 17:09:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2018-01-24 17:09:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 17:09:41,842 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:09:41,843 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:09:41,843 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 17:09:41,843 INFO L82 PathProgramCache]: Analyzing trace with hash -859332542, now seen corresponding path program 1 times [2018-01-24 17:09:41,843 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:09:41,844 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:41,844 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:09:41,844 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:41,844 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:09:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:09:41,871 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:09:41,990 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 17:09:41,991 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:09:41,991 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 17:09:41,991 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:09:41,992 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 17:09:41,992 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 17:09:41,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 17:09:41,993 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 6 states. [2018-01-24 17:09:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:09:42,264 INFO L93 Difference]: Finished difference Result 164 states and 180 transitions. [2018-01-24 17:09:42,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 17:09:42,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-01-24 17:09:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:09:42,267 INFO L225 Difference]: With dead ends: 164 [2018-01-24 17:09:42,267 INFO L226 Difference]: Without dead ends: 160 [2018-01-24 17:09:42,267 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 17:09:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-24 17:09:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 135. [2018-01-24 17:09:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-01-24 17:09:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2018-01-24 17:09:42,286 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 27 [2018-01-24 17:09:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:09:42,287 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2018-01-24 17:09:42,287 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 17:09:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2018-01-24 17:09:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 17:09:42,288 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:09:42,289 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:09:42,289 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 17:09:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -733968282, now seen corresponding path program 1 times [2018-01-24 17:09:42,289 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:09:42,290 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:42,291 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:09:42,291 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:42,291 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:09:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:09:42,309 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:09:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:09:42,381 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:09:42,381 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 17:09:42,381 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:09:42,382 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 17:09:42,382 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 17:09:42,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 17:09:42,383 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand 6 states. [2018-01-24 17:09:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:09:42,621 INFO L93 Difference]: Finished difference Result 192 states and 206 transitions. [2018-01-24 17:09:42,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 17:09:42,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-01-24 17:09:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:09:42,623 INFO L225 Difference]: With dead ends: 192 [2018-01-24 17:09:42,623 INFO L226 Difference]: Without dead ends: 143 [2018-01-24 17:09:42,624 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 17:09:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-24 17:09:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2018-01-24 17:09:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-01-24 17:09:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2018-01-24 17:09:42,637 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 27 [2018-01-24 17:09:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:09:42,638 INFO L432 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2018-01-24 17:09:42,638 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 17:09:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2018-01-24 17:09:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 17:09:42,639 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:09:42,639 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:09:42,639 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr34EnsuresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 17:09:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash -920992417, now seen corresponding path program 1 times [2018-01-24 17:09:42,640 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:09:42,641 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:42,641 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:09:42,641 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:09:42,641 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:09:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 17:09:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 17:09:42,692 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-24 17:09:42,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 05:09:42 BoogieIcfgContainer [2018-01-24 17:09:42,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 17:09:42,720 INFO L168 Benchmark]: Toolchain (without parser) took 2749.24 ms. Allocated memory was 306.7 MB in the beginning and 479.2 MB in the end (delta: 172.5 MB). Free memory was 266.8 MB in the beginning and 409.7 MB in the end (delta: -142.9 MB). Peak memory consumption was 29.6 MB. Max. memory is 5.3 GB. [2018-01-24 17:09:42,721 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 306.7 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 17:09:42,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.09 ms. Allocated memory is still 306.7 MB. Free memory was 265.7 MB in the beginning and 254.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 5.3 GB. [2018-01-24 17:09:42,721 INFO L168 Benchmark]: Boogie Preprocessor took 37.81 ms. Allocated memory is still 306.7 MB. Free memory was 254.7 MB in the beginning and 252.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 17:09:42,722 INFO L168 Benchmark]: RCFGBuilder took 442.58 ms. Allocated memory is still 306.7 MB. Free memory was 252.7 MB in the beginning and 226.1 MB in the end (delta: 26.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 5.3 GB. [2018-01-24 17:09:42,722 INFO L168 Benchmark]: TraceAbstraction took 2049.03 ms. Allocated memory was 306.7 MB in the beginning and 479.2 MB in the end (delta: 172.5 MB). Free memory was 226.1 MB in the beginning and 409.7 MB in the end (delta: -183.6 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 17:09:42,723 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 306.7 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 212.09 ms. Allocated memory is still 306.7 MB. Free memory was 265.7 MB in the beginning and 254.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 37.81 ms. Allocated memory is still 306.7 MB. Free memory was 254.7 MB in the beginning and 252.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 442.58 ms. Allocated memory is still 306.7 MB. Free memory was 252.7 MB in the beginning and 226.1 MB in the end (delta: 26.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2049.03 ms. Allocated memory was 306.7 MB in the beginning and 479.2 MB in the end (delta: 172.5 MB). Free memory was 226.1 MB in the beginning and 409.7 MB in the end (delta: -183.6 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: [L628] List p, a, t; [L629] EXPR, FCALL malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={20:0}] [L629] a = (List) malloc(sizeof(struct node)) VAL [a={20:0}, malloc(sizeof(struct node))={20:0}] [L630] COND FALSE !(a == 0) VAL [a={20:0}, malloc(sizeof(struct node))={20:0}] [L631] p = a [L632] int i = 0; VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}] [L633] i < 20 && __VERIFIER_nondet_int() [L633] i < 20 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={20:0}, i=0, i < 20 && __VERIFIER_nondet_int()=0, malloc(sizeof(struct node))={20:0}, p={20:0}] [L633] COND FALSE !(i < 20 && __VERIFIER_nondet_int()) [L646] FCALL p->h = 3 VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}] [L647] p = a VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}] [L648] EXPR, FCALL p->h VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}, p->h=3] [L648] COND FALSE !(p->h != 3) [L659] EXPR, FCALL p->h VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}, p->h=3] [L659] COND FALSE !(p->h != 3 || i > 20) [L661] p = a VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}] [L662] EXPR, FCALL p->n VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}, p->n={18:14}] [L662] COND TRUE p->n != 0 [L663] EXPR, FCALL p->n VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}, p->n={18:14}] [L663] t = p->n [L664] FCALL free(p) VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={20:0}, t={18:14}] [L665] p = t VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={18:14}, t={18:14}] [L662] FCALL p->n VAL [a={20:0}, i=0, malloc(sizeof(struct node))={20:0}, p={18:14}, t={18:14}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 96 locations, 35 error locations. UNSAFE Result, 1.9s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 298 SDtfs, 720 SDslu, 374 SDs, 0 SdLazy, 472 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=4, 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, 72 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 9709 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/list-ext_flag_false-unreach-call_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_17-09-42-729.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/list-ext_flag_false-unreach-call_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_17-09-42-729.csv Received shutdown request...