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-properties/simple_true-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 06:20:11,075 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 06:20:11,077 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 06:20:11,092 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 06:20:11,093 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 06:20:11,094 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 06:20:11,095 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 06:20:11,096 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 06:20:11,099 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 06:20:11,100 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 06:20:11,101 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 06:20:11,101 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 06:20:11,102 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 06:20:11,103 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 06:20:11,104 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 06:20:11,107 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 06:20:11,109 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 06:20:11,111 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 06:20:11,112 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 06:20:11,114 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 06:20:11,116 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 06:20:11,116 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 06:20:11,116 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 06:20:11,118 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 06:20:11,118 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 06:20:11,120 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 06:20:11,120 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 06:20:11,121 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 06:20:11,121 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 06:20:11,121 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 06:20:11,122 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 06:20:11,122 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 06:20:11,130 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 06:20:11,131 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 06:20:11,131 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 06:20:11,132 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 06:20:11,132 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 06:20:11,132 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 06:20:11,132 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 06:20:11,132 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 06:20:11,132 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 06:20:11,133 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 06:20:11,133 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 06:20:11,133 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 06:20:11,133 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 06:20:11,133 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 06:20:11,133 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 06:20:11,133 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 06:20:11,133 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 06:20:11,134 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 06:20:11,134 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 06:20:11,134 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 06:20:11,134 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 06:20:11,134 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 06:20:11,134 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 06:20:11,135 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 06:20:11,135 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 06:20:11,135 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 06:20:11,135 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 06:20:11,135 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 06:20:11,135 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 06:20:11,136 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 06:20:11,136 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 06:20:11,136 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 06:20:11,136 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 06:20:11,136 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 06:20:11,136 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 06:20:11,136 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 06:20:11,136 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 06:20:11,137 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 06:20:11,137 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 06:20:11,170 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 06:20:11,180 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 06:20:11,184 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 06:20:11,185 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 06:20:11,185 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 06:20:11,186 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_true-unreach-call_false-valid-memtrack.i [2018-01-21 06:20:11,342 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 06:20:11,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 06:20:11,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 06:20:11,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 06:20:11,353 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 06:20:11,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@793dbc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11, skipping insertion in model container [2018-01-21 06:20:11,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,371 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:20:11,409 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:20:11,531 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:20:11,551 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:20:11,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11 WrapperNode [2018-01-21 06:20:11,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 06:20:11,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 06:20:11,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 06:20:11,560 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 06:20:11,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (1/1) ... [2018-01-21 06:20:11,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 06:20:11,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 06:20:11,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 06:20:11,598 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 06:20:11,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (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 06:20:11,650 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 06:20:11,650 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 06:20:11,650 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-21 06:20:11,650 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 06:20:11,650 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 06:20:11,651 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 06:20:11,652 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-21 06:20:11,652 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 06:20:11,652 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 06:20:11,652 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 06:20:11,820 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 06:20:11,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:20:11 BoogieIcfgContainer [2018-01-21 06:20:11,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 06:20:11,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 06:20:11,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 06:20:11,823 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 06:20:11,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 06:20:11" (1/3) ... [2018-01-21 06:20:11,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68322e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:20:11, skipping insertion in model container [2018-01-21 06:20:11,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:11" (2/3) ... [2018-01-21 06:20:11,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68322e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:20:11, skipping insertion in model container [2018-01-21 06:20:11,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:20:11" (3/3) ... [2018-01-21 06:20:11,826 INFO L105 eAbstractionObserver]: Analyzing ICFG simple_true-unreach-call_false-valid-memtrack.i [2018-01-21 06:20:11,834 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 06:20:11,840 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 06:20:11,888 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:20:11,888 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:20:11,888 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:20:11,889 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:20:11,889 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:20:11,889 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:20:11,889 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:20:11,889 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == exitErr0EnsuresViolation======== [2018-01-21 06:20:11,890 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:20:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 06:20:11,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 06:20:11,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2018-01-21 06:20:12,001 INFO L401 ceAbstractionStarter]: For program point exitErr0EnsuresViolation(line 525) no Hoare annotation was computed. [2018-01-21 06:20:12,001 INFO L401 ceAbstractionStarter]: For program point exitFINAL(lines 619 621) no Hoare annotation was computed. [2018-01-21 06:20:12,002 INFO L404 ceAbstractionStarter]: At program point exitENTRY(lines 619 621) the Hoare annotation is: true [2018-01-21 06:20:12,002 INFO L401 ceAbstractionStarter]: For program point L620(line 620) no Hoare annotation was computed. [2018-01-21 06:20:12,002 INFO L401 ceAbstractionStarter]: For program point exitEXIT(lines 619 621) no Hoare annotation was computed. [2018-01-21 06:20:12,002 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 648) no Hoare annotation was computed. [2018-01-21 06:20:12,002 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 648) no Hoare annotation was computed. [2018-01-21 06:20:12,002 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 648) the Hoare annotation is: true [2018-01-21 06:20:12,003 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 648) no Hoare annotation was computed. [2018-01-21 06:20:12,003 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 648) the Hoare annotation is: true [2018-01-21 06:20:12,003 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 648) no Hoare annotation was computed. [2018-01-21 06:20:12,003 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 648) the Hoare annotation is: true [2018-01-21 06:20:12,003 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 648) no Hoare annotation was computed. [2018-01-21 06:20:12,004 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 648) no Hoare annotation was computed. [2018-01-21 06:20:12,004 INFO L401 ceAbstractionStarter]: For program point L627(line 627) no Hoare annotation was computed. [2018-01-21 06:20:12,004 INFO L401 ceAbstractionStarter]: For program point L628(line 628) no Hoare annotation was computed. [2018-01-21 06:20:12,004 INFO L401 ceAbstractionStarter]: For program point L631'(lines 631 637) no Hoare annotation was computed. [2018-01-21 06:20:12,004 INFO L404 ceAbstractionStarter]: At program point L631'''(lines 631 637) the Hoare annotation is: true [2018-01-21 06:20:12,004 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 626 648) no Hoare annotation was computed. [2018-01-21 06:20:12,005 INFO L401 ceAbstractionStarter]: For program point L642'''(lines 642 644) no Hoare annotation was computed. [2018-01-21 06:20:12,005 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 626 648) no Hoare annotation was computed. [2018-01-21 06:20:12,005 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 626 648) the Hoare annotation is: true [2018-01-21 06:20:12,005 INFO L401 ceAbstractionStarter]: For program point L632'(line 632) no Hoare annotation was computed. [2018-01-21 06:20:12,005 INFO L401 ceAbstractionStarter]: For program point L631''''(lines 631 637) no Hoare annotation was computed. [2018-01-21 06:20:12,005 INFO L404 ceAbstractionStarter]: At program point L628'(line 628) the Hoare annotation is: true [2018-01-21 06:20:12,006 INFO L401 ceAbstractionStarter]: For program point L641(lines 641 646) no Hoare annotation was computed. [2018-01-21 06:20:12,006 INFO L404 ceAbstractionStarter]: At program point L641''(lines 641 646) the Hoare annotation is: true [2018-01-21 06:20:12,006 INFO L401 ceAbstractionStarter]: For program point L645(line 645) no Hoare annotation was computed. [2018-01-21 06:20:12,006 INFO L401 ceAbstractionStarter]: For program point L643(line 643) no Hoare annotation was computed. [2018-01-21 06:20:12,006 INFO L401 ceAbstractionStarter]: For program point L642(line 642) no Hoare annotation was computed. [2018-01-21 06:20:12,006 INFO L401 ceAbstractionStarter]: For program point L628'''(line 628) no Hoare annotation was computed. [2018-01-21 06:20:12,006 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 626 648) no Hoare annotation was computed. [2018-01-21 06:20:12,007 INFO L401 ceAbstractionStarter]: For program point L634(line 634) no Hoare annotation was computed. [2018-01-21 06:20:12,007 INFO L401 ceAbstractionStarter]: For program point L633(line 633) no Hoare annotation was computed. [2018-01-21 06:20:12,007 INFO L401 ceAbstractionStarter]: For program point L632(line 632) no Hoare annotation was computed. [2018-01-21 06:20:12,007 INFO L401 ceAbstractionStarter]: For program point L631(lines 631 637) no Hoare annotation was computed. [2018-01-21 06:20:12,007 INFO L401 ceAbstractionStarter]: For program point L638(line 638) no Hoare annotation was computed. [2018-01-21 06:20:12,007 INFO L401 ceAbstractionStarter]: For program point L636(line 636) no Hoare annotation was computed. [2018-01-21 06:20:12,007 INFO L401 ceAbstractionStarter]: For program point L635(line 635) no Hoare annotation was computed. [2018-01-21 06:20:12,008 INFO L401 ceAbstractionStarter]: For program point L641'''(lines 641 646) no Hoare annotation was computed. [2018-01-21 06:20:12,008 INFO L401 ceAbstractionStarter]: For program point L639(line 639) no Hoare annotation was computed. [2018-01-21 06:20:12,008 INFO L404 ceAbstractionStarter]: At program point L634'(line 634) the Hoare annotation is: true [2018-01-21 06:20:12,008 INFO L401 ceAbstractionStarter]: For program point L642'(line 642) no Hoare annotation was computed. [2018-01-21 06:20:12,008 INFO L401 ceAbstractionStarter]: For program point L634'''(line 634) no Hoare annotation was computed. [2018-01-21 06:20:12,012 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:20:12,012 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:20:12,012 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:20:12,013 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:20:12,013 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:20:12,013 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:20:12,013 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:20:12,013 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 06:20:12,013 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:20:12,015 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 06:20:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 06:20:12,016 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:12,017 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 06:20:12,017 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 06:20:12,022 INFO L82 PathProgramCache]: Analyzing trace with hash 111860, now seen corresponding path program 1 times [2018-01-21 06:20:12,025 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:12,042 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,043 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:12,043 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,043 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:20:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:20:12,095 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:20:12,099 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:20:12,103 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:20:12,103 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:20:12,104 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:20:12,104 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:20:12,104 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:20:12,104 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:20:12,104 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:20:12,104 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 06:20:12,105 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:20:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 06:20:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 06:20:12,108 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:12,108 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 06:20:12,109 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:20:12,109 INFO L82 PathProgramCache]: Analyzing trace with hash 531101053, now seen corresponding path program 1 times [2018-01-21 06:20:12,109 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:12,110 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,110 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:12,111 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,111 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:20:12,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:20:12,167 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 06:20:12,169 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:20:12,169 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:20:12,169 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:20:12,171 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:20:12,181 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:20:12,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:20:12,184 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-21 06:20:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:20:12,269 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-01-21 06:20:12,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:20:12,270 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 06:20:12,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:20:12,277 INFO L225 Difference]: With dead ends: 58 [2018-01-21 06:20:12,277 INFO L226 Difference]: Without dead ends: 33 [2018-01-21 06:20:12,280 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 06:20:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-21 06:20:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-21 06:20:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-21 06:20:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-01-21 06:20:12,306 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 18 [2018-01-21 06:20:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:20:12,306 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-01-21 06:20:12,306 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:20:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-01-21 06:20:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 06:20:12,307 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:12,307 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] [2018-01-21 06:20:12,307 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:20:12,307 INFO L82 PathProgramCache]: Analyzing trace with hash 403826474, now seen corresponding path program 1 times [2018-01-21 06:20:12,308 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:12,308 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,309 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:12,309 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,309 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:20:12,333 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:20:12,401 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 06:20:12,401 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:20:12,402 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:20:12,402 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:20:12,403 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:20:12,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:20:12,404 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:20:12,404 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2018-01-21 06:20:12,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:20:12,522 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-01-21 06:20:12,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:20:12,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-01-21 06:20:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:20:12,524 INFO L225 Difference]: With dead ends: 57 [2018-01-21 06:20:12,524 INFO L226 Difference]: Without dead ends: 52 [2018-01-21 06:20:12,525 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 06:20:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-21 06:20:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2018-01-21 06:20:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-21 06:20:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-01-21 06:20:12,532 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 21 [2018-01-21 06:20:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:20:12,532 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-01-21 06:20:12,532 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:20:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-01-21 06:20:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 06:20:12,533 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:12,533 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:20:12,534 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:20:12,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1062535480, now seen corresponding path program 1 times [2018-01-21 06:20:12,534 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:12,535 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,535 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:12,535 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,535 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:20:12,552 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:20:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 06:20:12,605 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:20:12,605 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 06:20:12,606 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:20:12,606 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 06:20:12,606 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 06:20:12,607 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 06:20:12,607 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 4 states. [2018-01-21 06:20:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:20:12,654 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-01-21 06:20:12,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 06:20:12,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-21 06:20:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:20:12,656 INFO L225 Difference]: With dead ends: 56 [2018-01-21 06:20:12,656 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 06:20:12,657 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 06:20:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 06:20:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-01-21 06:20:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-21 06:20:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-01-21 06:20:12,663 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 27 [2018-01-21 06:20:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:20:12,663 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-01-21 06:20:12,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 06:20:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-01-21 06:20:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 06:20:12,665 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:12,665 INFO L322 BasicCegarLoop]: trace histogram [2, 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 06:20:12,665 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:20:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash -571757697, now seen corresponding path program 1 times [2018-01-21 06:20:12,665 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:12,666 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,666 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:12,667 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:12,667 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:20:12,695 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:20:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 06:20:12,834 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:20:12,834 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:20:12,835 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-21 06:20:12,837 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [9], [13], [15], [18], [20], [21], [22], [23], [29], [31], [32], [33], [37], [38], [39], [43], [47], [49], [50], [57], [59], [60], [64], [65], [72], [73], [78], [83], [84], [85], [86] [2018-01-21 06:20:12,884 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 06:20:12,884 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