java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/list-ext-properties/list-ext_1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:37:47,780 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:37:47,782 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:37:47,795 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:37:47,795 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:37:47,796 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:37:47,797 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:37:47,799 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:37:47,800 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:37:47,801 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:37:47,802 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:37:47,802 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:37:47,802 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:37:47,803 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:37:47,804 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:37:47,806 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:37:47,809 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:37:47,811 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:37:47,812 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:37:47,813 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:37:47,816 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 08:37:47,816 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 08:37:47,816 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 08:37:47,817 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 08:37:47,818 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 08:37:47,820 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 08:37:47,820 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 08:37:47,821 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 08:37:47,821 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 08:37:47,821 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:37:47,822 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:37:47,822 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:37:47,832 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:37:47,832 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:37:47,833 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:37:47,834 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:37:47,834 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:37:47,834 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:37:47,834 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:37:47,834 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:37:47,834 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:37:47,835 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:37:47,835 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:37:47,836 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:37:47,836 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:37:47,836 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:37:47,836 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:37:47,836 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:37:47,836 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:37:47,837 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:37:47,837 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:37:47,837 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:37:47,837 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:37:47,837 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:37:47,838 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:37:47,838 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:37:47,838 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:37:47,838 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:37:47,838 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:37:47,839 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:37:47,839 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:37:47,839 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:37:47,839 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:37:47,839 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:37:47,840 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:37:47,840 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:37:47,840 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:37:47,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:37:47,840 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:37:47,840 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:37:47,841 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:37:47,841 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:37:47,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:37:47,890 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:37:47,894 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:37:47,896 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:37:47,897 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:37:47,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/list-ext_1_true-valid-memsafety.i [2018-01-21 08:37:48,119 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:37:48,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:37:48,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:37:48,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:37:48,129 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:37:48,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,132 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 08:37:48, skipping insertion in model container [2018-01-21 08:37:48,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,143 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:37:48,181 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:37:48,299 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:37:48,318 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:37:48,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48 WrapperNode [2018-01-21 08:37:48,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:37:48,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:37:48,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:37:48,325 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:37:48,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (1/1) ... [2018-01-21 08:37:48,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:37:48,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:37:48,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:37:48,364 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:37:48,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:37:48,411 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:37:48,412 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:37:48,412 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-21 08:37:48,412 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:37:48,412 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:37:48,412 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:37:48,412 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:37:48,412 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:37:48,412 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:37:48,412 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:37:48,413 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:37:48,413 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 08:37:48,413 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:37:48,413 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:37:48,413 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:37:48,413 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-21 08:37:48,414 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:37:48,414 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:37:48,414 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:37:48,726 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:37:48,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:37:48 BoogieIcfgContainer [2018-01-21 08:37:48,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:37:48,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:37:48,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:37:48,731 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:37:48,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:37:48" (1/3) ... [2018-01-21 08:37:48,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e936bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:37:48, skipping insertion in model container [2018-01-21 08:37:48,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:48" (2/3) ... [2018-01-21 08:37:48,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e936bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:37:48, skipping insertion in model container [2018-01-21 08:37:48,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:37:48" (3/3) ... [2018-01-21 08:37:48,736 INFO L105 eAbstractionObserver]: Analyzing ICFG list-ext_1_true-valid-memsafety.i [2018-01-21 08:37:48,746 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:37:48,755 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:37:48,798 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:37:48,798 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:37:48,799 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:37:48,799 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:37:48,799 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:37:48,799 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:37:48,799 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:37:48,799 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == exitErr0EnsuresViolation======== [2018-01-21 08:37:48,800 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:37:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-01-21 08:37:48,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:37:48,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 70 states. [2018-01-21 08:37:48,910 INFO L401 ceAbstractionStarter]: For program point exitErr0EnsuresViolation(line 525) no Hoare annotation was computed. [2018-01-21 08:37:48,910 INFO L401 ceAbstractionStarter]: For program point exitFINAL(lines 619 621) no Hoare annotation was computed. [2018-01-21 08:37:48,911 INFO L404 ceAbstractionStarter]: At program point exitENTRY(lines 619 621) the Hoare annotation is: true [2018-01-21 08:37:48,911 INFO L401 ceAbstractionStarter]: For program point L620(line 620) no Hoare annotation was computed. [2018-01-21 08:37:48,911 INFO L401 ceAbstractionStarter]: For program point exitEXIT(lines 619 621) no Hoare annotation was computed. [2018-01-21 08:37:48,911 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:48,911 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:48,911 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 672) the Hoare annotation is: true [2018-01-21 08:37:48,912 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:48,912 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 672) the Hoare annotation is: true [2018-01-21 08:37:48,912 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:48,912 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 672) the Hoare annotation is: true [2018-01-21 08:37:48,912 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:48,912 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:48,913 INFO L401 ceAbstractionStarter]: For program point L641'''''(lines 641 648) no Hoare annotation was computed. [2018-01-21 08:37:48,913 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 08:37:48,913 INFO L401 ceAbstractionStarter]: For program point L635'(line 635) no Hoare annotation was computed. [2018-01-21 08:37:48,913 INFO L401 ceAbstractionStarter]: For program point L641''''''(lines 641 648) no Hoare annotation was computed. [2018-01-21 08:37:48,913 INFO L401 ceAbstractionStarter]: For program point L658'''(lines 658 661) no Hoare annotation was computed. [2018-01-21 08:37:48,913 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 626 672) no Hoare annotation was computed. [2018-01-21 08:37:48,914 INFO L401 ceAbstractionStarter]: For program point L641(lines 641 648) no Hoare annotation was computed. [2018-01-21 08:37:48,914 INFO L401 ceAbstractionStarter]: For program point L645(line 645) no Hoare annotation was computed. [2018-01-21 08:37:48,914 INFO L401 ceAbstractionStarter]: For program point L644(line 644) no Hoare annotation was computed. [2018-01-21 08:37:48,914 INFO L401 ceAbstractionStarter]: For program point L643(line 643) no Hoare annotation was computed. [2018-01-21 08:37:48,914 INFO L401 ceAbstractionStarter]: For program point L660'(line 660) no Hoare annotation was computed. [2018-01-21 08:37:48,914 INFO L401 ceAbstractionStarter]: For program point L649(line 649) no Hoare annotation was computed. [2018-01-21 08:37:48,915 INFO L401 ceAbstractionStarter]: For program point L647(line 647) no Hoare annotation was computed. [2018-01-21 08:37:48,915 INFO L401 ceAbstractionStarter]: For program point L646(line 646) no Hoare annotation was computed. [2018-01-21 08:37:48,915 INFO L404 ceAbstractionStarter]: At program point L645'(line 645) the Hoare annotation is: true [2018-01-21 08:37:48,915 INFO L401 ceAbstractionStarter]: For program point L633'(line 633) no Hoare annotation was computed. [2018-01-21 08:37:48,915 INFO L401 ceAbstractionStarter]: For program point L629'(line 629) no Hoare annotation was computed. [2018-01-21 08:37:48,915 INFO L401 ceAbstractionStarter]: For program point L637'''(line 637) no Hoare annotation was computed. [2018-01-21 08:37:48,916 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 626 672) no Hoare annotation was computed. [2018-01-21 08:37:48,916 INFO L401 ceAbstractionStarter]: For program point L630(line 630) no Hoare annotation was computed. [2018-01-21 08:37:48,916 INFO L401 ceAbstractionStarter]: For program point L665''''(lines 665 669) no Hoare annotation was computed. [2018-01-21 08:37:48,916 INFO L401 ceAbstractionStarter]: For program point L633(lines 633 640) no Hoare annotation was computed. [2018-01-21 08:37:48,916 INFO L401 ceAbstractionStarter]: For program point L638(line 638) no Hoare annotation was computed. [2018-01-21 08:37:48,916 INFO L401 ceAbstractionStarter]: For program point L637(line 637) no Hoare annotation was computed. [2018-01-21 08:37:48,917 INFO L401 ceAbstractionStarter]: For program point L636(line 636) no Hoare annotation was computed. [2018-01-21 08:37:48,917 INFO L404 ceAbstractionStarter]: At program point L665'''(lines 665 669) the Hoare annotation is: true [2018-01-21 08:37:48,917 INFO L401 ceAbstractionStarter]: For program point L635(line 635) no Hoare annotation was computed. [2018-01-21 08:37:48,917 INFO L401 ceAbstractionStarter]: For program point L658'(line 658) no Hoare annotation was computed. [2018-01-21 08:37:48,917 INFO L401 ceAbstractionStarter]: For program point L639(line 639) no Hoare annotation was computed. [2018-01-21 08:37:48,918 INFO L401 ceAbstractionStarter]: For program point L663(line 663) no Hoare annotation was computed. [2018-01-21 08:37:48,918 INFO L401 ceAbstractionStarter]: For program point L662(line 662) no Hoare annotation was computed. [2018-01-21 08:37:48,918 INFO L401 ceAbstractionStarter]: For program point L660(line 660) no Hoare annotation was computed. [2018-01-21 08:37:48,918 INFO L404 ceAbstractionStarter]: At program point L630'(line 630) the Hoare annotation is: true [2018-01-21 08:37:48,918 INFO L401 ceAbstractionStarter]: For program point L645'''(line 645) no Hoare annotation was computed. [2018-01-21 08:37:48,918 INFO L401 ceAbstractionStarter]: For program point L667(line 667) no Hoare annotation was computed. [2018-01-21 08:37:48,919 INFO L401 ceAbstractionStarter]: For program point L666(line 666) no Hoare annotation was computed. [2018-01-21 08:37:48,919 INFO L401 ceAbstractionStarter]: For program point L665(lines 665 669) no Hoare annotation was computed. [2018-01-21 08:37:48,919 INFO L401 ceAbstractionStarter]: For program point L667'(line 667) no Hoare annotation was computed. [2018-01-21 08:37:48,919 INFO L401 ceAbstractionStarter]: For program point L643'(line 643) no Hoare annotation was computed. [2018-01-21 08:37:48,919 INFO L404 ceAbstractionStarter]: At program point L654'''(lines 654 657) the Hoare annotation is: true [2018-01-21 08:37:48,920 INFO L401 ceAbstractionStarter]: For program point L650(line 650) no Hoare annotation was computed. [2018-01-21 08:37:48,920 INFO L401 ceAbstractionStarter]: For program point L656(line 656) no Hoare annotation was computed. [2018-01-21 08:37:48,920 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 626 672) no Hoare annotation was computed. [2018-01-21 08:37:48,920 INFO L401 ceAbstractionStarter]: For program point L654(lines 654 657) no Hoare annotation was computed. [2018-01-21 08:37:48,920 INFO L401 ceAbstractionStarter]: For program point L658(lines 658 661) no Hoare annotation was computed. [2018-01-21 08:37:48,920 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 626 672) the Hoare annotation is: true [2018-01-21 08:37:48,921 INFO L404 ceAbstractionStarter]: At program point L633'''''(lines 633 640) the Hoare annotation is: true [2018-01-21 08:37:48,921 INFO L401 ceAbstractionStarter]: For program point L656'(line 656) no Hoare annotation was computed. [2018-01-21 08:37:48,921 INFO L401 ceAbstractionStarter]: For program point L630'''(line 630) no Hoare annotation was computed. [2018-01-21 08:37:48,921 INFO L401 ceAbstractionStarter]: For program point L662''(lines 662 663) no Hoare annotation was computed. [2018-01-21 08:37:48,921 INFO L401 ceAbstractionStarter]: For program point L658''''(lines 658 661) no Hoare annotation was computed. [2018-01-21 08:37:48,921 INFO L404 ceAbstractionStarter]: At program point L637'(line 637) the Hoare annotation is: true [2018-01-21 08:37:48,922 INFO L401 ceAbstractionStarter]: For program point L665'(line 665) no Hoare annotation was computed. [2018-01-21 08:37:48,922 INFO L401 ceAbstractionStarter]: For program point L633'''(line 633) no Hoare annotation was computed. [2018-01-21 08:37:48,922 INFO L401 ceAbstractionStarter]: For program point L670(line 670) no Hoare annotation was computed. [2018-01-21 08:37:48,922 INFO L401 ceAbstractionStarter]: For program point L641'(line 641) no Hoare annotation was computed. [2018-01-21 08:37:48,922 INFO L401 ceAbstractionStarter]: For program point L641'''(line 641) no Hoare annotation was computed. [2018-01-21 08:37:48,922 INFO L401 ceAbstractionStarter]: For program point L666'(line 666) no Hoare annotation was computed. [2018-01-21 08:37:48,922 INFO L401 ceAbstractionStarter]: For program point L654'(line 654) no Hoare annotation was computed. [2018-01-21 08:37:48,927 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:37:48,927 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:37:48,927 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:37:48,927 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:37:48,928 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:37:48,928 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:37:48,928 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:37:48,928 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:37:48,928 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:37:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-01-21 08:37:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:37:48,932 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:48,933 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:37:48,933 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:37:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash 188257, now seen corresponding path program 1 times [2018-01-21 08:37:48,941 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:48,964 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:48,964 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:48,964 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:48,964 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:37:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:37:49,023 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:37:49,028 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:37:49,034 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:37:49,034 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:37:49,034 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:37:49,035 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:37:49,035 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:37:49,035 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:37:49,035 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:37:49,035 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:37:49,035 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:37:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-01-21 08:37:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 08:37:49,040 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:49,040 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:37:49,040 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:37:49,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1932365681, now seen corresponding path program 1 times [2018-01-21 08:37:49,041 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:49,042 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,042 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:49,042 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,043 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:37:49,068 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:37:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:37:49,181 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:37:49,182 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:37:49,182 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:37:49,185 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:37:49,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:37:49,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:37:49,197 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 2 states. [2018-01-21 08:37:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:37:49,218 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2018-01-21 08:37:49,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:37:49,219 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 08:37:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:37:49,226 INFO L225 Difference]: With dead ends: 116 [2018-01-21 08:37:49,226 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 08:37:49,228 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:37:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 08:37:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-21 08:37:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-21 08:37:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2018-01-21 08:37:49,258 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 26 [2018-01-21 08:37:49,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:37:49,258 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2018-01-21 08:37:49,258 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:37:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2018-01-21 08:37:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 08:37:49,259 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:49,259 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:37:49,260 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:37:49,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1521926025, now seen corresponding path program 1 times [2018-01-21 08:37:49,260 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:49,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,261 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:49,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,261 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:37:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:37:49,352 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:37:49,361 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:37:49,368 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:37:49,368 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:37:49,382 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:37:49,382 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:37:49,382 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:37:49,383 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:37:49,383 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:37:49,383 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:37:49,383 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:37:49,383 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:37:49,383 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:37:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-01-21 08:37:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 08:37:49,386 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:49,386 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] [2018-01-21 08:37:49,386 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:37:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1812064646, now seen corresponding path program 1 times [2018-01-21 08:37:49,386 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:49,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,387 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:49,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,388 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:37:49,398 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:37:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:37:49,413 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:37:49,413 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:37:49,413 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:37:49,413 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:37:49,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:37:49,414 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:37:49,414 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 2 states. [2018-01-21 08:37:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:37:49,422 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2018-01-21 08:37:49,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:37:49,422 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-01-21 08:37:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:37:49,424 INFO L225 Difference]: With dead ends: 116 [2018-01-21 08:37:49,424 INFO L226 Difference]: Without dead ends: 59 [2018-01-21 08:37:49,425 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:37:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-21 08:37:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-21 08:37:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-21 08:37:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2018-01-21 08:37:49,431 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 24 [2018-01-21 08:37:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:37:49,432 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2018-01-21 08:37:49,432 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:37:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2018-01-21 08:37:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 08:37:49,434 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:49,434 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:37:49,434 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:37:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash 314432500, now seen corresponding path program 1 times [2018-01-21 08:37:49,435 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:49,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,436 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:49,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,436 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:37:49,457 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:37:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:37:49,643 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:37:49,643 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:37:49,643 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:37:49,644 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:37:49,644 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:37:49,644 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:37:49,645 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 6 states. [2018-01-21 08:37:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:37:49,954 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2018-01-21 08:37:49,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:37:49,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-21 08:37:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:37:49,956 INFO L225 Difference]: With dead ends: 118 [2018-01-21 08:37:49,957 INFO L226 Difference]: Without dead ends: 114 [2018-01-21 08:37:49,958 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-21 08:37:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-21 08:37:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2018-01-21 08:37:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-21 08:37:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2018-01-21 08:37:49,970 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 36 [2018-01-21 08:37:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:37:49,971 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2018-01-21 08:37:49,971 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:37:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2018-01-21 08:37:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-21 08:37:49,972 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:49,972 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, 1, 1, 1, 1, 1, 1] [2018-01-21 08:37:49,973 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:37:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash 721961098, now seen corresponding path program 1 times [2018-01-21 08:37:49,973 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:49,974 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,974 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:49,974 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:49,974 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:37:50,000 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:37:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:37:50,246 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:37:50,247 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:37:50,248 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 44 with the following transitions: [2018-01-21 08:37:50,249 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [25], [46], [48], [51], [57], [76], [77], [78], [82], [84], [87], [97], [99], [102], [110], [117], [119], [123], [125], [128], [130], [131], [132], [133], [134], [138], [139], [141], [147], [148], [160], [161], [162] [2018-01-21 08:37:50,310 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:37:50,310 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