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/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/list-ext-properties/simple-ext_1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:38:57,908 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:38:57,910 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:38:57,925 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:38:57,925 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:38:57,926 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:38:57,927 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:38:57,929 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:38:57,930 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:38:57,931 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:38:57,931 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:38:57,932 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:38:57,932 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:38:57,934 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:38:57,935 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:38:57,937 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:38:57,939 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:38:57,941 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:38:57,943 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:38:57,944 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:38:57,946 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 08:38:57,946 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 08:38:57,946 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 08:38:57,947 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 08:38:57,948 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 08:38:57,949 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 08:38:57,950 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 08:38:57,950 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 08:38:57,950 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 08:38:57,951 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:38:57,951 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:38:57,952 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:38:57,961 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:38:57,962 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:38:57,963 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:38:57,963 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:38:57,963 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:38:57,963 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:38:57,963 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:38:57,964 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:38:57,964 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:38:57,964 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:38:57,965 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:38:57,965 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:38:57,965 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:38:57,965 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:38:57,965 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:38:57,966 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:38:57,966 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:38:57,966 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:38:57,966 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:38:57,966 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:38:57,966 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:38:57,967 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:38:57,967 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:38:57,967 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:38:57,967 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:38:57,967 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:38:57,968 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:38:57,968 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:38:57,968 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:38:57,968 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:38:57,968 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:38:57,969 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:38:57,969 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:38:57,969 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:38:57,969 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:38:57,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:38:57,969 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:38:57,970 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:38:57,970 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:38:57,971 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:38:58,004 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:38:58,017 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:38:58,021 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:38:58,022 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:38:58,023 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:38:58,024 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/simple-ext_1_true-valid-memsafety.i [2018-01-21 08:38:58,210 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:38:58,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:38:58,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:38:58,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:38:58,257 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:38:58,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c517b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58, skipping insertion in model container [2018-01-21 08:38:58,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,274 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:38:58,310 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:38:58,430 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:38:58,453 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:38:58,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58 WrapperNode [2018-01-21 08:38:58,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:38:58,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:38:58,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:38:58,460 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:38:58,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (1/1) ... [2018-01-21 08:38:58,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:38:58,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:38:58,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:38:58,496 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:38:58,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (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 [2018-01-21 08:38:58,546 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:38:58,546 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:38:58,546 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-21 08:38:58,546 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:38:58,546 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 08:38:58,547 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:38:58,548 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:38:58,548 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-21 08:38:58,548 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:38:58,548 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:38:58,548 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:38:58,744 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:38:58,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:38:58 BoogieIcfgContainer [2018-01-21 08:38:58,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:38:58,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:38:58,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:38:58,747 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:38:58,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:38:58" (1/3) ... [2018-01-21 08:38:58,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22656262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:38:58, skipping insertion in model container [2018-01-21 08:38:58,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:38:58" (2/3) ... [2018-01-21 08:38:58,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22656262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:38:58, skipping insertion in model container [2018-01-21 08:38:58,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:38:58" (3/3) ... [2018-01-21 08:38:58,750 INFO L105 eAbstractionObserver]: Analyzing ICFG simple-ext_1_true-valid-memsafety.i [2018-01-21 08:38:58,758 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:38:58,763 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:38:58,805 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:38:58,805 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:38:58,805 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:38:58,805 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:38:58,805 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:38:58,806 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:38:58,806 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:38:58,806 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == exitErr0EnsuresViolation======== [2018-01-21 08:38:58,806 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:38:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-21 08:38:58,827 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:38:58,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2018-01-21 08:38:58,902 INFO L401 ceAbstractionStarter]: For program point exitErr0EnsuresViolation(line 526) no Hoare annotation was computed. [2018-01-21 08:38:58,903 INFO L401 ceAbstractionStarter]: For program point exitFINAL(lines 620 622) no Hoare annotation was computed. [2018-01-21 08:38:58,903 INFO L404 ceAbstractionStarter]: At program point exitENTRY(lines 620 622) the Hoare annotation is: true [2018-01-21 08:38:58,903 INFO L401 ceAbstractionStarter]: For program point L621(line 621) no Hoare annotation was computed. [2018-01-21 08:38:58,904 INFO L401 ceAbstractionStarter]: For program point exitEXIT(lines 620 622) no Hoare annotation was computed. [2018-01-21 08:38:58,904 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 659) no Hoare annotation was computed. [2018-01-21 08:38:58,904 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 659) no Hoare annotation was computed. [2018-01-21 08:38:58,904 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 659) the Hoare annotation is: true [2018-01-21 08:38:58,904 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 659) no Hoare annotation was computed. [2018-01-21 08:38:58,904 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 659) the Hoare annotation is: true [2018-01-21 08:38:58,904 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 659) no Hoare annotation was computed. [2018-01-21 08:38:58,905 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 659) the Hoare annotation is: true [2018-01-21 08:38:58,905 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 659) no Hoare annotation was computed. [2018-01-21 08:38:58,905 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 659) no Hoare annotation was computed. [2018-01-21 08:38:58,905 INFO L401 ceAbstractionStarter]: For program point L645'''(lines 645 651) no Hoare annotation was computed. [2018-01-21 08:38:58,905 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 08:38:58,905 INFO L401 ceAbstractionStarter]: For program point L628(line 628) no Hoare annotation was computed. [2018-01-21 08:38:58,905 INFO L401 ceAbstractionStarter]: For program point L655'(line 655) no Hoare annotation was computed. [2018-01-21 08:38:58,906 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 627 659) no Hoare annotation was computed. [2018-01-21 08:38:58,906 INFO L401 ceAbstractionStarter]: For program point L655(line 655) no Hoare annotation was computed. [2018-01-21 08:38:58,906 INFO L401 ceAbstractionStarter]: For program point L654(line 654) no Hoare annotation was computed. [2018-01-21 08:38:58,906 INFO L404 ceAbstractionStarter]: At program point L653''(lines 653 657) the Hoare annotation is: true [2018-01-21 08:38:58,906 INFO L401 ceAbstractionStarter]: For program point L653(lines 653 657) no Hoare annotation was computed. [2018-01-21 08:38:58,906 INFO L401 ceAbstractionStarter]: For program point L629'''(line 629) no Hoare annotation was computed. [2018-01-21 08:38:58,907 INFO L401 ceAbstractionStarter]: For program point L646'''(lines 646 648) no Hoare annotation was computed. [2018-01-21 08:38:58,907 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 627 659) no Hoare annotation was computed. [2018-01-21 08:38:58,907 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 627 659) the Hoare annotation is: true [2018-01-21 08:38:58,907 INFO L404 ceAbstractionStarter]: At program point L633'''''(lines 633 640) the Hoare annotation is: true [2018-01-21 08:38:58,907 INFO L404 ceAbstractionStarter]: At program point L636'(line 636) the Hoare annotation is: true [2018-01-21 08:38:58,907 INFO L401 ceAbstractionStarter]: For program point L636'''(line 636) no Hoare annotation was computed. [2018-01-21 08:38:58,908 INFO L401 ceAbstractionStarter]: For program point L653'''(lines 653 657) no Hoare annotation was computed. [2018-01-21 08:38:58,908 INFO L401 ceAbstractionStarter]: For program point L641(line 641) no Hoare annotation was computed. [2018-01-21 08:38:58,908 INFO L401 ceAbstractionStarter]: For program point L645(lines 645 651) no Hoare annotation was computed. [2018-01-21 08:38:58,908 INFO L404 ceAbstractionStarter]: At program point L645''(lines 645 651) the Hoare annotation is: true [2018-01-21 08:38:58,908 INFO L401 ceAbstractionStarter]: For program point L642(line 642) no Hoare annotation was computed. [2018-01-21 08:38:58,908 INFO L401 ceAbstractionStarter]: For program point L649(line 649) no Hoare annotation was computed. [2018-01-21 08:38:58,908 INFO L401 ceAbstractionStarter]: For program point L647(line 647) no Hoare annotation was computed. [2018-01-21 08:38:58,909 INFO L401 ceAbstractionStarter]: For program point L646(line 646) no Hoare annotation was computed. [2018-01-21 08:38:58,909 INFO L401 ceAbstractionStarter]: For program point L633''''''(lines 633 640) no Hoare annotation was computed. [2018-01-21 08:38:58,909 INFO L401 ceAbstractionStarter]: For program point L633'(line 633) no Hoare annotation was computed. [2018-01-21 08:38:58,909 INFO L401 ceAbstractionStarter]: For program point L633'''(line 633) no Hoare annotation was computed. [2018-01-21 08:38:58,909 INFO L404 ceAbstractionStarter]: At program point L629'(line 629) the Hoare annotation is: true [2018-01-21 08:38:58,909 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 627 659) no Hoare annotation was computed. [2018-01-21 08:38:58,909 INFO L401 ceAbstractionStarter]: For program point L634(line 634) no Hoare annotation was computed. [2018-01-21 08:38:58,910 INFO L401 ceAbstractionStarter]: For program point L633(lines 633 640) no Hoare annotation was computed. [2018-01-21 08:38:58,910 INFO L401 ceAbstractionStarter]: For program point L638(line 638) no Hoare annotation was computed. [2018-01-21 08:38:58,910 INFO L401 ceAbstractionStarter]: For program point L637(line 637) no Hoare annotation was computed. [2018-01-21 08:38:58,910 INFO L401 ceAbstractionStarter]: For program point L636(line 636) no Hoare annotation was computed. [2018-01-21 08:38:58,910 INFO L401 ceAbstractionStarter]: For program point L635(line 635) no Hoare annotation was computed. [2018-01-21 08:38:58,910 INFO L401 ceAbstractionStarter]: For program point L646'(line 646) no Hoare annotation was computed. [2018-01-21 08:38:58,911 INFO L401 ceAbstractionStarter]: For program point L634'(line 634) no Hoare annotation was computed. [2018-01-21 08:38:58,911 INFO L401 ceAbstractionStarter]: For program point L654'(line 654) no Hoare annotation was computed. [2018-01-21 08:38:58,915 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:38:58,915 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:38:58,915 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:38:58,915 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:38:58,915 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:38:58,915 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:38:58,916 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:38:58,916 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:38:58,916 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:38:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-21 08:38:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:38:58,919 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:38:58,920 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:38:58,920 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:38:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash 135692, now seen corresponding path program 1 times [2018-01-21 08:38:58,925 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:38:58,940 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:58,940 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:38:58,940 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:58,940 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:38:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:38:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:38:58,985 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:38:58,990 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:38:58,995 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:38:58,996 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:38:58,996 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:38:58,996 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:38:58,996 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:38:58,996 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:38:58,996 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:38:58,996 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:38:58,997 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:38:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-21 08:38:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 08:38:59,001 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:38:59,001 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] [2018-01-21 08:38:59,001 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:38:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1622057019, now seen corresponding path program 1 times [2018-01-21 08:38:59,002 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:38:59,003 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,003 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:38:59,003 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,003 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:38:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:38:59,024 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:38:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:38:59,137 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:38:59,137 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:38:59,137 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:38:59,140 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:38:59,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:38:59,155 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:38:59,157 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2018-01-21 08:38:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:38:59,172 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2018-01-21 08:38:59,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:38:59,173 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 08:38:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:38:59,179 INFO L225 Difference]: With dead ends: 73 [2018-01-21 08:38:59,179 INFO L226 Difference]: Without dead ends: 41 [2018-01-21 08:38:59,181 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 [2018-01-21 08:38:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-21 08:38:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-21 08:38:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 08:38:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-21 08:38:59,206 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 20 [2018-01-21 08:38:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:38:59,206 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-21 08:38:59,206 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:38:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-21 08:38:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 08:38:59,207 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:38:59,207 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] [2018-01-21 08:38:59,207 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:38:59,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1506847670, now seen corresponding path program 1 times [2018-01-21 08:38:59,208 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:38:59,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,208 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:38:59,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,209 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:38:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:38:59,237 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:38:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:38:59,322 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:38:59,322 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:38:59,322 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:38:59,324 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:38:59,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:38:59,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:38:59,325 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2018-01-21 08:38:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:38:59,437 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2018-01-21 08:38:59,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:38:59,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-21 08:38:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:38:59,439 INFO L225 Difference]: With dead ends: 79 [2018-01-21 08:38:59,439 INFO L226 Difference]: Without dead ends: 67 [2018-01-21 08:38:59,440 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:38:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-21 08:38:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2018-01-21 08:38:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-21 08:38:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-01-21 08:38:59,448 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2018-01-21 08:38:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:38:59,448 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-01-21 08:38:59,448 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:38:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-01-21 08:38:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 08:38:59,450 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:38:59,450 INFO L322 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2018-01-21 08:38:59,450 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:38:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1533825156, now seen corresponding path program 1 times [2018-01-21 08:38:59,450 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:38:59,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,452 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:38:59,452 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,452 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:38:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:38:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:38:59,511 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:38:59,519 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:38:59,524 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:38:59,524 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:38:59,533 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:38:59,533 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:38:59,533 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:38:59,533 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:38:59,534 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:38:59,534 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:38:59,534 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:38:59,534 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:38:59,534 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:38:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-21 08:38:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 08:38:59,536 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:38:59,536 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:38:59,536 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:38:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash 220682052, now seen corresponding path program 1 times [2018-01-21 08:38:59,536 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:38:59,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,537 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:38:59,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,537 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:38:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:38:59,545 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:38:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:38:59,555 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:38:59,555 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:38:59,555 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:38:59,555 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:38:59,556 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:38:59,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:38:59,556 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2018-01-21 08:38:59,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:38:59,560 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2018-01-21 08:38:59,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:38:59,561 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 08:38:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:38:59,562 INFO L225 Difference]: With dead ends: 73 [2018-01-21 08:38:59,562 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 08:38:59,562 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 [2018-01-21 08:38:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 08:38:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-21 08:38:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 08:38:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-21 08:38:59,567 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 18 [2018-01-21 08:38:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:38:59,567 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-21 08:38:59,567 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:38:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-21 08:38:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 08:38:59,568 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:38:59,568 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] [2018-01-21 08:38:59,569 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:38:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1544798995, now seen corresponding path program 1 times [2018-01-21 08:38:59,569 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:38:59,570 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,570 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:38:59,570 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,570 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:38:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:38:59,580 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:38:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:38:59,622 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:38:59,622 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:38:59,622 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:38:59,623 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:38:59,623 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:38:59,623 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:38:59,623 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2018-01-21 08:38:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:38:59,769 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2018-01-21 08:38:59,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:38:59,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-01-21 08:38:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:38:59,771 INFO L225 Difference]: With dead ends: 75 [2018-01-21 08:38:59,771 INFO L226 Difference]: Without dead ends: 65 [2018-01-21 08:38:59,771 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:38:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-21 08:38:59,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2018-01-21 08:38:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 08:38:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-21 08:38:59,776 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 23 [2018-01-21 08:38:59,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:38:59,776 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-21 08:38:59,776 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:38:59,776 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-21 08:38:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 08:38:59,777 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:38:59,777 INFO L322 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1] [2018-01-21 08:38:59,777 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:38:59,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1056343501, now seen corresponding path program 1 times [2018-01-21 08:38:59,777 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:38:59,778 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,778 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:38:59,778 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:38:59,778 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:38:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:38:59,792 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:38:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 08:38:59,970 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:38:59,970 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:38:59,971 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-01-21 08:38:59,974 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [9], [13], [15], [18], [24], [43], [44], [45], [49], [53], [55], [56], [63], [65], [66], [70], [74], [78], [80], [81], [82], [83], [84], [88], [90], [96], [97], [107], [108], [109] [2018-01-21 08:39:00,032 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:39:00,032 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown