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_precise.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 05:56:45,028 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:56:45,030 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:56:45,044 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:56:45,045 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:56:45,045 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:56:45,046 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:56:45,047 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:56:45,049 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:56:45,050 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:56:45,050 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:56:45,050 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:56:45,051 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:56:45,052 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:56:45,053 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:56:45,056 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:56:45,058 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:56:45,060 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:56:45,062 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:56:45,063 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:56:45,066 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 05:56:45,066 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 05:56:45,066 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 05:56:45,067 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 05:56:45,068 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 05:56:45,070 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 05:56:45,070 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 05:56:45,071 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 05:56:45,071 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 05:56:45,071 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:56:45,072 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:56:45,072 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_precise.epf [2018-01-21 05:56:45,082 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:56:45,083 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:56:45,083 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:56:45,084 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:56:45,084 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:56:45,084 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:56:45,084 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:56:45,084 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:56:45,085 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:56:45,085 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:56:45,086 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:56:45,086 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:56:45,086 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:56:45,086 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:56:45,086 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:56:45,086 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:56:45,087 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:56:45,087 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:56:45,087 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:56:45,087 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:56:45,087 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:56:45,088 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:56:45,088 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:56:45,088 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:56:45,088 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:56:45,089 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:56:45,089 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:56:45,089 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:56:45,089 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:56:45,089 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:56:45,090 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:56:45,090 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:56:45,090 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:56:45,090 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:56:45,090 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:56:45,090 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:56:45,091 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:56:45,092 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:56:45,092 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:56:45,128 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:56:45,141 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:56:45,145 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:56:45,146 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:56:45,147 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:56:45,148 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/simple-ext_1_true-valid-memsafety.i [2018-01-21 05:56:45,344 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:56:45,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:56:45,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:56:45,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:56:45,357 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:56:45,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6479bd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45, skipping insertion in model container [2018-01-21 05:56:45,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,380 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:56:45,420 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:56:45,538 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:56:45,554 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:56:45,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45 WrapperNode [2018-01-21 05:56:45,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:56:45,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:56:45,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:56:45,562 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:56:45,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (1/1) ... [2018-01-21 05:56:45,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:56:45,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:56:45,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:56:45,600 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:56:45,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (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 05:56:45,645 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:56:45,645 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:56:45,645 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-21 05:56:45,645 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:56:45,645 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 05:56:45,645 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 05:56:45,645 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:56:45,645 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:56:45,646 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:56:45,646 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:56:45,646 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:56:45,646 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:56:45,646 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 05:56:45,646 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 05:56:45,646 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 05:56:45,646 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-21 05:56:45,647 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:56:45,647 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:56:45,647 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:56:45,861 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:56:45,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:56:45 BoogieIcfgContainer [2018-01-21 05:56:45,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:56:45,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:56:45,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:56:45,865 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:56:45,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:56:45" (1/3) ... [2018-01-21 05:56:45,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49df0bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:56:45, skipping insertion in model container [2018-01-21 05:56:45,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:56:45" (2/3) ... [2018-01-21 05:56:45,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49df0bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:56:45, skipping insertion in model container [2018-01-21 05:56:45,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:56:45" (3/3) ... [2018-01-21 05:56:45,868 INFO L105 eAbstractionObserver]: Analyzing ICFG simple-ext_1_true-valid-memsafety.i [2018-01-21 05:56:45,875 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:56:45,882 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 05:56:45,935 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:56:45,936 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:56:45,936 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:56:45,936 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:56:45,936 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:56:45,936 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:56:45,936 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:56:45,937 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == exitErr0EnsuresViolation======== [2018-01-21 05:56:45,937 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:56:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-21 05:56:45,966 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:56:45,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2018-01-21 05:56:46,052 INFO L401 ceAbstractionStarter]: For program point exitErr0EnsuresViolation(line 526) no Hoare annotation was computed. [2018-01-21 05:56:46,052 INFO L401 ceAbstractionStarter]: For program point exitFINAL(lines 620 622) no Hoare annotation was computed. [2018-01-21 05:56:46,052 INFO L404 ceAbstractionStarter]: At program point exitENTRY(lines 620 622) the Hoare annotation is: true [2018-01-21 05:56:46,052 INFO L401 ceAbstractionStarter]: For program point L621(line 621) no Hoare annotation was computed. [2018-01-21 05:56:46,053 INFO L401 ceAbstractionStarter]: For program point exitEXIT(lines 620 622) no Hoare annotation was computed. [2018-01-21 05:56:46,053 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 659) no Hoare annotation was computed. [2018-01-21 05:56:46,053 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 659) no Hoare annotation was computed. [2018-01-21 05:56:46,053 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 659) the Hoare annotation is: true [2018-01-21 05:56:46,053 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 659) no Hoare annotation was computed. [2018-01-21 05:56:46,053 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 659) the Hoare annotation is: true [2018-01-21 05:56:46,053 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 659) no Hoare annotation was computed. [2018-01-21 05:56:46,054 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 659) the Hoare annotation is: true [2018-01-21 05:56:46,054 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 659) no Hoare annotation was computed. [2018-01-21 05:56:46,054 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 659) no Hoare annotation was computed. [2018-01-21 05:56:46,054 INFO L401 ceAbstractionStarter]: For program point L645'''(lines 645 651) no Hoare annotation was computed. [2018-01-21 05:56:46,054 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 05:56:46,054 INFO L401 ceAbstractionStarter]: For program point L628(line 628) no Hoare annotation was computed. [2018-01-21 05:56:46,054 INFO L401 ceAbstractionStarter]: For program point L655'(line 655) no Hoare annotation was computed. [2018-01-21 05:56:46,055 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 627 659) no Hoare annotation was computed. [2018-01-21 05:56:46,055 INFO L401 ceAbstractionStarter]: For program point L655(line 655) no Hoare annotation was computed. [2018-01-21 05:56:46,055 INFO L401 ceAbstractionStarter]: For program point L654(line 654) no Hoare annotation was computed. [2018-01-21 05:56:46,055 INFO L404 ceAbstractionStarter]: At program point L653''(lines 653 657) the Hoare annotation is: true [2018-01-21 05:56:46,055 INFO L401 ceAbstractionStarter]: For program point L653(lines 653 657) no Hoare annotation was computed. [2018-01-21 05:56:46,055 INFO L401 ceAbstractionStarter]: For program point L629'''(line 629) no Hoare annotation was computed. [2018-01-21 05:56:46,056 INFO L401 ceAbstractionStarter]: For program point L646'''(lines 646 648) no Hoare annotation was computed. [2018-01-21 05:56:46,056 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 627 659) no Hoare annotation was computed. [2018-01-21 05:56:46,056 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 627 659) the Hoare annotation is: true [2018-01-21 05:56:46,056 INFO L404 ceAbstractionStarter]: At program point L633'''''(lines 633 640) the Hoare annotation is: true [2018-01-21 05:56:46,056 INFO L404 ceAbstractionStarter]: At program point L636'(line 636) the Hoare annotation is: true [2018-01-21 05:56:46,056 INFO L401 ceAbstractionStarter]: For program point L636'''(line 636) no Hoare annotation was computed. [2018-01-21 05:56:46,057 INFO L401 ceAbstractionStarter]: For program point L653'''(lines 653 657) no Hoare annotation was computed. [2018-01-21 05:56:46,057 INFO L401 ceAbstractionStarter]: For program point L641(line 641) no Hoare annotation was computed. [2018-01-21 05:56:46,057 INFO L401 ceAbstractionStarter]: For program point L645(lines 645 651) no Hoare annotation was computed. [2018-01-21 05:56:46,057 INFO L404 ceAbstractionStarter]: At program point L645''(lines 645 651) the Hoare annotation is: true [2018-01-21 05:56:46,057 INFO L401 ceAbstractionStarter]: For program point L642(line 642) no Hoare annotation was computed. [2018-01-21 05:56:46,057 INFO L401 ceAbstractionStarter]: For program point L649(line 649) no Hoare annotation was computed. [2018-01-21 05:56:46,057 INFO L401 ceAbstractionStarter]: For program point L647(line 647) no Hoare annotation was computed. [2018-01-21 05:56:46,058 INFO L401 ceAbstractionStarter]: For program point L646(line 646) no Hoare annotation was computed. [2018-01-21 05:56:46,058 INFO L401 ceAbstractionStarter]: For program point L633''''''(lines 633 640) no Hoare annotation was computed. [2018-01-21 05:56:46,058 INFO L401 ceAbstractionStarter]: For program point L633'(line 633) no Hoare annotation was computed. [2018-01-21 05:56:46,058 INFO L401 ceAbstractionStarter]: For program point L633'''(line 633) no Hoare annotation was computed. [2018-01-21 05:56:46,058 INFO L404 ceAbstractionStarter]: At program point L629'(line 629) the Hoare annotation is: true [2018-01-21 05:56:46,058 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 627 659) no Hoare annotation was computed. [2018-01-21 05:56:46,058 INFO L401 ceAbstractionStarter]: For program point L634(line 634) no Hoare annotation was computed. [2018-01-21 05:56:46,059 INFO L401 ceAbstractionStarter]: For program point L633(lines 633 640) no Hoare annotation was computed. [2018-01-21 05:56:46,059 INFO L401 ceAbstractionStarter]: For program point L638(line 638) no Hoare annotation was computed. [2018-01-21 05:56:46,059 INFO L401 ceAbstractionStarter]: For program point L637(line 637) no Hoare annotation was computed. [2018-01-21 05:56:46,059 INFO L401 ceAbstractionStarter]: For program point L636(line 636) no Hoare annotation was computed. [2018-01-21 05:56:46,059 INFO L401 ceAbstractionStarter]: For program point L635(line 635) no Hoare annotation was computed. [2018-01-21 05:56:46,059 INFO L401 ceAbstractionStarter]: For program point L646'(line 646) no Hoare annotation was computed. [2018-01-21 05:56:46,060 INFO L401 ceAbstractionStarter]: For program point L634'(line 634) no Hoare annotation was computed. [2018-01-21 05:56:46,060 INFO L401 ceAbstractionStarter]: For program point L654'(line 654) no Hoare annotation was computed. [2018-01-21 05:56:46,064 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:56:46,064 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:56:46,065 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:56:46,065 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:56:46,065 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:56:46,065 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:56:46,065 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:56:46,065 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:56:46,065 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:56:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-21 05:56:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:56:46,068 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:56:46,070 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:56:46,070 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:56:46,075 INFO L82 PathProgramCache]: Analyzing trace with hash 135692, now seen corresponding path program 1 times [2018-01-21 05:56:46,078 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:56:46,101 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,101 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:56:46,102 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,102 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:56:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:56:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:56:46,163 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:56:46,169 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:56:46,175 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:56:46,175 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:56:46,175 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:56:46,175 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:56:46,176 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:56:46,176 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:56:46,176 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:56:46,176 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:56:46,176 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:56:46,178 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-21 05:56:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 05:56:46,180 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:56:46,181 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 05:56:46,181 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:56:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1622057019, now seen corresponding path program 1 times [2018-01-21 05:56:46,181 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:56:46,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,183 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:56:46,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,183 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:56:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:56:46,208 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:56:46,247 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 05:56:46,249 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:56:46,249 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:56:46,249 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:56:46,252 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:56:46,331 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:56:46,332 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:56:46,335 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2018-01-21 05:56:46,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:56:46,351 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2018-01-21 05:56:46,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:56:46,353 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 05:56:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:56:46,361 INFO L225 Difference]: With dead ends: 73 [2018-01-21 05:56:46,361 INFO L226 Difference]: Without dead ends: 41 [2018-01-21 05:56:46,364 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 05:56:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-21 05:56:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-21 05:56:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 05:56:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-21 05:56:46,395 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 20 [2018-01-21 05:56:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:56:46,395 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-21 05:56:46,395 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:56:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-21 05:56:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 05:56:46,397 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:56:46,397 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 05:56:46,397 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:56:46,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1506847670, now seen corresponding path program 1 times [2018-01-21 05:56:46,397 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:56:46,398 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,398 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:56:46,399 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,399 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:56:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:56:46,428 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:56:46,520 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 05:56:46,521 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:56:46,521 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:56:46,521 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:56:46,523 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:56:46,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:56:46,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:56:46,524 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2018-01-21 05:56:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:56:46,690 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2018-01-21 05:56:46,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:56:46,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-21 05:56:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:56:46,692 INFO L225 Difference]: With dead ends: 79 [2018-01-21 05:56:46,692 INFO L226 Difference]: Without dead ends: 67 [2018-01-21 05:56:46,693 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 05:56:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-21 05:56:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2018-01-21 05:56:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-21 05:56:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-01-21 05:56:46,701 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2018-01-21 05:56:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:56:46,702 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-01-21 05:56:46,702 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:56:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-01-21 05:56:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 05:56:46,703 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:56:46,704 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 05:56:46,704 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:56:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1533825156, now seen corresponding path program 1 times [2018-01-21 05:56:46,704 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:56:46,705 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,706 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:56:46,706 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,706 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:56:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:56:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:56:46,773 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:56:46,781 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:56:46,788 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:56:46,788 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:56:46,802 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:56:46,802 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:56:46,803 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:56:46,803 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:56:46,803 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:56:46,803 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:56:46,803 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:56:46,803 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:56:46,803 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:56:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-21 05:56:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 05:56:46,807 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:56:46,807 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 05:56:46,807 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:56:46,807 INFO L82 PathProgramCache]: Analyzing trace with hash 220682052, now seen corresponding path program 1 times [2018-01-21 05:56:46,807 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:56:46,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,809 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:56:46,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,809 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:56:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:56:46,816 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:56:46,826 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 05:56:46,827 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:56:46,827 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:56:46,827 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:56:46,827 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:56:46,827 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:56:46,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:56:46,828 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2018-01-21 05:56:46,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:56:46,833 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2018-01-21 05:56:46,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:56:46,833 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 05:56:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:56:46,834 INFO L225 Difference]: With dead ends: 73 [2018-01-21 05:56:46,835 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 05:56:46,835 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 05:56:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 05:56:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-21 05:56:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 05:56:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-21 05:56:46,840 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 18 [2018-01-21 05:56:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:56:46,841 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-21 05:56:46,841 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:56:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-21 05:56:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 05:56:46,842 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:56:46,842 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 05:56:46,842 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:56:46,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1544798995, now seen corresponding path program 1 times [2018-01-21 05:56:46,843 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:56:46,844 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,844 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:56:46,844 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:46,844 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:56:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:56:46,859 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:56:46,928 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 05:56:46,929 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:56:46,929 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:56:46,929 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:56:46,930 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:56:46,930 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:56:46,930 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:56:46,930 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2018-01-21 05:56:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:56:47,015 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2018-01-21 05:56:47,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:56:47,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-01-21 05:56:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:56:47,016 INFO L225 Difference]: With dead ends: 75 [2018-01-21 05:56:47,017 INFO L226 Difference]: Without dead ends: 65 [2018-01-21 05:56:47,017 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 05:56:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-21 05:56:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2018-01-21 05:56:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 05:56:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-21 05:56:47,021 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 23 [2018-01-21 05:56:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:56:47,022 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-21 05:56:47,022 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:56:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-21 05:56:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 05:56:47,022 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:56:47,023 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 05:56:47,023 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:56:47,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1056343501, now seen corresponding path program 1 times [2018-01-21 05:56:47,023 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:56:47,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:47,024 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:56:47,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:56:47,024 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:56:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:56:47,045 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:56:47,212 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 05:56:47,212 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:56:47,212 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:56:47,213 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-01-21 05:56:47,216 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 05:56:47,265 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:56:47,265 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